Personal area networks (PANs) allow communication between devices within close proximity of an individual. There are two main types of PANs - wired and wireless. Wireless PANs (WPANs) use technologies like infrared, Bluetooth, and HomeRF to connect devices within 10 meters. Common WPAN devices include PDAs, phones, and laptops. WPANs offer advantages like easy setup and portability but have limitations such as low data rates and limited range compared to wireless local area networks. WPANs can be used in education for sharing files between devices and printing wirelessly. The future of WPANs involves using human body signals to transmit data between devices.
A storage area network (SAN) provides centralized storage for multiple servers to access over a network. SANs are useful for large networks that require more storage than a single server can offer, allowing terabytes of data to be accessible by multiple machines. The key components of a SAN include fiber channel switches that connect servers and storage devices, host bus adapters that interface storage with operating systems, and storage devices like fiber channel disks. SANs provide benefits like high storage capacity, reduced costs, increased performance, and improved backup and recovery compared to adding more individual servers. However, SANs also have disadvantages in being expensive to implement and maintain and requiring technical expertise.
A brief study on Storage Area Network (SAN), SAN architecture & its importance. It focuses on the techniques and the technologies that have evolved around SAN & its Security.
A personal area network (PAN) connects devices within an individual's immediate vicinity, such as computers and phones. There are two types of PANs: wired and wireless. Wired PANs connect devices physically using cables, while wireless PANs connect devices through infrared, Bluetooth, or home radio frequency without cables. Wireless PANs are established automatically once devices are within range of each other. PANs provide quick and easy data transfer but have limited range and compatibility between devices. They are used in applications like healthcare, transportation hubs, education, the military, homes, and offices.
This document summarizes Bluetooth security. It begins with an introduction to Bluetooth technology and its history. It then discusses Bluetooth security modes and protocols, including authentication, encryption key generation, and encryption. The document notes some of Bluetooth's most important security weaknesses, such as issues with the encryption algorithms and denial of service attacks. It concludes by listing references for further information on Bluetooth security specifications and research.
What is a network?
Need for networking
Components of Network
Types of Network
Evolution of Networking
Communication media
Data Communication Terminologies
Switching Techniques
Digital and Analog Transmission
Network Topology
Network Devices
Communication Protocols
Wireless/Mobile Computing
Computer networks and its components by narender singh sandhuNarenderSinghSandhu2
A computer network is a group of computers that are connected to each other for the purpose of communication. Networks may be classified according to a wide variety of characteristics. This article provides a general overview of types and categories and also presents the basic components of a network.
This document discusses Fibre Channel storage area networks (SANs). It covers SAN components like host bus adapters, storage arrays, switches, and cabling. Fibre Channel SAN connectivity options include point-to-point, arbitrated loop, and switched fabric. The document also examines Fibre Channel addressing, protocols, and data organization. Key topics covered include Fibre Channel protocol stack, world wide names, frame structure, and SAN management software.
A storage area network (SAN) provides centralized storage for multiple servers to access over a network. SANs are useful for large networks that require more storage than a single server can offer, allowing terabytes of data to be accessible by multiple machines. The key components of a SAN include fiber channel switches that connect servers and storage devices, host bus adapters that interface storage with operating systems, and storage devices like fiber channel disks. SANs provide benefits like high storage capacity, reduced costs, increased performance, and improved backup and recovery compared to adding more individual servers. However, SANs also have disadvantages in being expensive to implement and maintain and requiring technical expertise.
A brief study on Storage Area Network (SAN), SAN architecture & its importance. It focuses on the techniques and the technologies that have evolved around SAN & its Security.
A personal area network (PAN) connects devices within an individual's immediate vicinity, such as computers and phones. There are two types of PANs: wired and wireless. Wired PANs connect devices physically using cables, while wireless PANs connect devices through infrared, Bluetooth, or home radio frequency without cables. Wireless PANs are established automatically once devices are within range of each other. PANs provide quick and easy data transfer but have limited range and compatibility between devices. They are used in applications like healthcare, transportation hubs, education, the military, homes, and offices.
This document summarizes Bluetooth security. It begins with an introduction to Bluetooth technology and its history. It then discusses Bluetooth security modes and protocols, including authentication, encryption key generation, and encryption. The document notes some of Bluetooth's most important security weaknesses, such as issues with the encryption algorithms and denial of service attacks. It concludes by listing references for further information on Bluetooth security specifications and research.
What is a network?
Need for networking
Components of Network
Types of Network
Evolution of Networking
Communication media
Data Communication Terminologies
Switching Techniques
Digital and Analog Transmission
Network Topology
Network Devices
Communication Protocols
Wireless/Mobile Computing
Computer networks and its components by narender singh sandhuNarenderSinghSandhu2
A computer network is a group of computers that are connected to each other for the purpose of communication. Networks may be classified according to a wide variety of characteristics. This article provides a general overview of types and categories and also presents the basic components of a network.
This document discusses Fibre Channel storage area networks (SANs). It covers SAN components like host bus adapters, storage arrays, switches, and cabling. Fibre Channel SAN connectivity options include point-to-point, arbitrated loop, and switched fabric. The document also examines Fibre Channel addressing, protocols, and data organization. Key topics covered include Fibre Channel protocol stack, world wide names, frame structure, and SAN management software.
MANET is a type of mobile ad hoc network that is self-configuring and infrastructureless, allowing mobile devices to connect without wires. Nodes in a MANET can join or leave the network freely, making the network topology dynamic. Each node acts as both a host and router to forward data. MANETs support multi-hop routing to allow communication between nodes out of direct wireless range. They offer advantages like scalability, low cost, and access to information anywhere but also face challenges like variable wireless link quality, low data rates, and partitioned networks due to node movement.
This presentation gives brief description of Wi-Fi Technolgy, standards, applications,topologies, how Wi-Fi network works, security,advantages and innovations.
The document discusses IPv6 over wireless personal area networks (6LoWPAN). It describes challenges like small IPv6 and UDP packet headers not fitting in 802.15.4 frames. It overviews how 6LoWPAN compresses headers, fragments packets, and allows IPv6 networks to connect over low power wireless links. Key concepts covered are 6LoWPAN dispatch codes, frame formats, header compression principles, and fragmentation/reassembly.
Medium Access Control :-
1.Distributed Operation
2.Synchronization
3.Hidden Terminals
4.Exposed terminals
5.Throughput
6.Access delay
7.Fairness
8.Real-time Traffic support
9.Resource reservation
10.Ability to measure resource availability
11.Capability for power control
Adaptive rate control
Use of directional antennas
Department Of computer Application- Advanced computer network
Main office:
Remote locations
Branch offices:
Home offices:
Mobile users
Resource-Sharing Functions and Benefits
Network User Applications
Characteristics of a Network
Foundation
Advance Internet working
Congestion Control & Resource Allocation
Network Security
Symmetric Key Encryption
Cryptographic Building Blocks
The document discusses wireless sensor networks and describes their key characteristics. It notes that wireless sensor networks consist of low-power smart sensor nodes distributed over a large field to enable wireless sensing and data networking. The sensor nodes contain sensors, processors, memory, and radios. Wireless sensor networks can be either unstructured with dense node distribution or structured with few scattered nodes.
The term “fog computing” or “edge computing” means that rather than hosting and working from a centralized cloud, fog systems operate on network ends. It is a term for placing some processes and resources at the edge of the cloud, instead of establishing channels for cloud storage and utilization.
Bluetooth is a wireless technology that allows electronic devices to communicate within short distances without wires or cables. It was invented in 1994 by Ericsson and uses radio waves to transfer data between devices like phones, laptops, and other portable devices. Common applications of Bluetooth include file transfers, connecting peripherals, wireless headphones, and connecting to cars or home stereos for hands-free calling.
Many users of computers, tablets, smartphones, routers and other networking devices are faced with a term such as MAC address. In this presentation, we’ll explain what a MAC address is, how to get a MAC address and how to change it in on a Mac operating system.
The document discusses database issues related to mobile computing. It describes how mobile devices cache data from servers to reduce latency when the device is offline. The cached data is referred to as being "hoarded" in the device database. It discusses different database architectures including one-tier architectures where the database is specific to a mobile device and two-tier architectures involving client-server models. It also describes different cache invalidation mechanisms used to maintain consistency between cached data on devices and data on servers.
This document discusses software defined networks (SDN). SDN separates the network control plane from the data plane, allowing a control plane to control multiple devices. The SDN architecture has three layers - the infrastructure layer consists of switches and routers that collect network status and process packets, the control layer bridges the application and infrastructure layers using a high-level language and network status information, and the application layer offers services through the control layer like load balancing and security. OpenFlow is a protocol that exchanges messages between controllers and switches to implement SDN functionality. SDN provides benefits like improved performance, flexibility, and reduced costs compared to traditional networks.
Fog Computing is a paradigm that extends Cloud computing and services to the edge of the network. Similar to Cloud, Fog provides data, compute, storage, and application services to end-users. The motivation of Fog computing lies in a series of real scenarios, such as Smart Grid, smart traffic lights in vehicular networks and software defined networks.
The document provides an overview of basic networking concepts including computer networks, local area networks (LANs), wide area networks (WANs), common LAN topologies, LAN transmission methods, LAN infrastructure devices, common network cabling, Ethernet, and network models like OSI and TCP/IP. It describes key aspects of each layer in the OSI model from application to network layer.
This includes description about what is ATM, its definition, layers, applications, working procedure, format type, available data bit rates, necessity of ATM, benefits & difference between Internet & ATM Network.
This document provides an overview of basic local area network (LAN) concepts including definitions, hardware, media, and sample implementations. It defines a LAN as a group of computers and devices sharing resources within a small geographic area. Common LAN hardware includes hubs, switches, bridges, and routers which connect devices and segment traffic at different OSI model layers. Wired media include twisted pair, coaxial, and fiber optic cables while common wireless technologies are Wi-Fi and WiMax. Sample configurations show home and business LAN setups connecting devices via these components.
ABSTRACT
Cloud computing promises to significantly change the way we use computers and access and store our personal and business information. With these new computing and communications paradigms arise new data security challenges. Existing data protection mechanisms such as encryption have failed in preventing data theft attacks, especially those perpetrated by an insider to the cloud provider. For securing user data from such attacks a new paradigm called fog computing can be used. Fog Computing is a paradigm that extends Cloud computing and services to the edge of the network. Similar to Cloud, Fog provides data, compute, storage, and application services to end-users. The motivation of Fog computing lies in a series of real scenarios, such as Smart Grid, smart traffic lights in vehicular networks and software defined network .This technique can monitor the user activity to identify the legitimacy and prevent from any unauthorized user access. Here we have discussed this paradigm for preventing misuse of user data and securing information.
This document discusses different types of sensor node hardware: augmented general-purpose computers, dedicated embedded sensor nodes, and system-on-chip devices. It notes that Berkley motes have gained popularity due to their small size, open source software, and commercial availability. The document also outlines challenges in sensor network programming like event-driven execution and low-level hardware controls. It describes node-level software platforms and simulators as well as state-centric programming approaches.
This document discusses Bluetooth technology and its use in smart sensor networks. It begins with an introduction of Bluetooth and its specifications. It then explains the two main Bluetooth topologies - piconet and scatternet. Next, it describes how Bluetooth can be used to create wireless sensor networks and the roles of smart sensor nodes and the gateway. It outlines the hardware and software considerations for implementing a Bluetooth smart sensor network and the process the gateway uses to communicate with smart sensor nodes. In conclusion, it briefly discusses applications of sensor networks and factors that influence sensor network design.
A personal area network (PAN) allows communication between devices near an individual via wired or wireless connections. Wireless PANs use technologies like Bluetooth or ZigBee. Bluetooth operates in the 2.4 GHz range using frequency hopping and can connect one master device to up to 7 slave devices. ZigBee uses the IEEE 802.15.4 standard and targets low-power, low data rate, secure mesh networking applications.
MANET is a type of mobile ad hoc network that is self-configuring and infrastructureless, allowing mobile devices to connect without wires. Nodes in a MANET can join or leave the network freely, making the network topology dynamic. Each node acts as both a host and router to forward data. MANETs support multi-hop routing to allow communication between nodes out of direct wireless range. They offer advantages like scalability, low cost, and access to information anywhere but also face challenges like variable wireless link quality, low data rates, and partitioned networks due to node movement.
This presentation gives brief description of Wi-Fi Technolgy, standards, applications,topologies, how Wi-Fi network works, security,advantages and innovations.
The document discusses IPv6 over wireless personal area networks (6LoWPAN). It describes challenges like small IPv6 and UDP packet headers not fitting in 802.15.4 frames. It overviews how 6LoWPAN compresses headers, fragments packets, and allows IPv6 networks to connect over low power wireless links. Key concepts covered are 6LoWPAN dispatch codes, frame formats, header compression principles, and fragmentation/reassembly.
Medium Access Control :-
1.Distributed Operation
2.Synchronization
3.Hidden Terminals
4.Exposed terminals
5.Throughput
6.Access delay
7.Fairness
8.Real-time Traffic support
9.Resource reservation
10.Ability to measure resource availability
11.Capability for power control
Adaptive rate control
Use of directional antennas
Department Of computer Application- Advanced computer network
Main office:
Remote locations
Branch offices:
Home offices:
Mobile users
Resource-Sharing Functions and Benefits
Network User Applications
Characteristics of a Network
Foundation
Advance Internet working
Congestion Control & Resource Allocation
Network Security
Symmetric Key Encryption
Cryptographic Building Blocks
The document discusses wireless sensor networks and describes their key characteristics. It notes that wireless sensor networks consist of low-power smart sensor nodes distributed over a large field to enable wireless sensing and data networking. The sensor nodes contain sensors, processors, memory, and radios. Wireless sensor networks can be either unstructured with dense node distribution or structured with few scattered nodes.
The term “fog computing” or “edge computing” means that rather than hosting and working from a centralized cloud, fog systems operate on network ends. It is a term for placing some processes and resources at the edge of the cloud, instead of establishing channels for cloud storage and utilization.
Bluetooth is a wireless technology that allows electronic devices to communicate within short distances without wires or cables. It was invented in 1994 by Ericsson and uses radio waves to transfer data between devices like phones, laptops, and other portable devices. Common applications of Bluetooth include file transfers, connecting peripherals, wireless headphones, and connecting to cars or home stereos for hands-free calling.
Many users of computers, tablets, smartphones, routers and other networking devices are faced with a term such as MAC address. In this presentation, we’ll explain what a MAC address is, how to get a MAC address and how to change it in on a Mac operating system.
The document discusses database issues related to mobile computing. It describes how mobile devices cache data from servers to reduce latency when the device is offline. The cached data is referred to as being "hoarded" in the device database. It discusses different database architectures including one-tier architectures where the database is specific to a mobile device and two-tier architectures involving client-server models. It also describes different cache invalidation mechanisms used to maintain consistency between cached data on devices and data on servers.
This document discusses software defined networks (SDN). SDN separates the network control plane from the data plane, allowing a control plane to control multiple devices. The SDN architecture has three layers - the infrastructure layer consists of switches and routers that collect network status and process packets, the control layer bridges the application and infrastructure layers using a high-level language and network status information, and the application layer offers services through the control layer like load balancing and security. OpenFlow is a protocol that exchanges messages between controllers and switches to implement SDN functionality. SDN provides benefits like improved performance, flexibility, and reduced costs compared to traditional networks.
Fog Computing is a paradigm that extends Cloud computing and services to the edge of the network. Similar to Cloud, Fog provides data, compute, storage, and application services to end-users. The motivation of Fog computing lies in a series of real scenarios, such as Smart Grid, smart traffic lights in vehicular networks and software defined networks.
The document provides an overview of basic networking concepts including computer networks, local area networks (LANs), wide area networks (WANs), common LAN topologies, LAN transmission methods, LAN infrastructure devices, common network cabling, Ethernet, and network models like OSI and TCP/IP. It describes key aspects of each layer in the OSI model from application to network layer.
This includes description about what is ATM, its definition, layers, applications, working procedure, format type, available data bit rates, necessity of ATM, benefits & difference between Internet & ATM Network.
This document provides an overview of basic local area network (LAN) concepts including definitions, hardware, media, and sample implementations. It defines a LAN as a group of computers and devices sharing resources within a small geographic area. Common LAN hardware includes hubs, switches, bridges, and routers which connect devices and segment traffic at different OSI model layers. Wired media include twisted pair, coaxial, and fiber optic cables while common wireless technologies are Wi-Fi and WiMax. Sample configurations show home and business LAN setups connecting devices via these components.
ABSTRACT
Cloud computing promises to significantly change the way we use computers and access and store our personal and business information. With these new computing and communications paradigms arise new data security challenges. Existing data protection mechanisms such as encryption have failed in preventing data theft attacks, especially those perpetrated by an insider to the cloud provider. For securing user data from such attacks a new paradigm called fog computing can be used. Fog Computing is a paradigm that extends Cloud computing and services to the edge of the network. Similar to Cloud, Fog provides data, compute, storage, and application services to end-users. The motivation of Fog computing lies in a series of real scenarios, such as Smart Grid, smart traffic lights in vehicular networks and software defined network .This technique can monitor the user activity to identify the legitimacy and prevent from any unauthorized user access. Here we have discussed this paradigm for preventing misuse of user data and securing information.
This document discusses different types of sensor node hardware: augmented general-purpose computers, dedicated embedded sensor nodes, and system-on-chip devices. It notes that Berkley motes have gained popularity due to their small size, open source software, and commercial availability. The document also outlines challenges in sensor network programming like event-driven execution and low-level hardware controls. It describes node-level software platforms and simulators as well as state-centric programming approaches.
This document discusses Bluetooth technology and its use in smart sensor networks. It begins with an introduction of Bluetooth and its specifications. It then explains the two main Bluetooth topologies - piconet and scatternet. Next, it describes how Bluetooth can be used to create wireless sensor networks and the roles of smart sensor nodes and the gateway. It outlines the hardware and software considerations for implementing a Bluetooth smart sensor network and the process the gateway uses to communicate with smart sensor nodes. In conclusion, it briefly discusses applications of sensor networks and factors that influence sensor network design.
A personal area network (PAN) allows communication between devices near an individual via wired or wireless connections. Wireless PANs use technologies like Bluetooth or ZigBee. Bluetooth operates in the 2.4 GHz range using frequency hopping and can connect one master device to up to 7 slave devices. ZigBee uses the IEEE 802.15.4 standard and targets low-power, low data rate, secure mesh networking applications.
A Personal Area Network (PAN) allows communication between devices like phones, tablets, and computers. A wireless PAN (WPAN) uses wireless technologies like Bluetooth, Infrared, and WiFi to connect devices within 10 meters. Bluetooth creates small networks called piconets to connect keyboards, headsets, and other personal devices. Infrared uses invisible light to connect devices like phones and remotes. WiFi provides connections over larger areas of around 91 meters for sharing files between devices on a local network. WPANs offer simple setup between portable devices but have limited range and speeds compared to other wireless technologies.
This document provides an overview of wireless personal area networks (WPANs), including Bluetooth, ZigBee, and Ultra-Wideband. It describes the key features and applications of each technology, how their protocols are structured, and how they compare to each other. Bluetooth supports data rates up to 2 Mbps over short ranges and is used in devices like phones, laptops, and printers. ZigBee focuses on low power consumption and supports thousands of nodes in a mesh network for uses like smart homes and buildings. Ultra-Wideband provides high data rates over short ranges and is used in applications like TVs, DVD players, and mobile devices.
Wireless Personal Area Networks (WPAN): Lowrate amd High RateDon Norwood
This document provides an overview of wireless personal area networks (WPANs) and discusses two specific WPAN standards, 802.15.3 (WPAN-LR) and 802.15.13a (WPAN-HR). It describes the components and design considerations of wireless sensor networks, including their applications, network models, protocol stacks involving different layers, and power, mobility and task management planes. Diagrams are included illustrating a WPAN standard summary, wireless sensor network model, sensor node components, and the sensor network protocol stack.
Bluetooth is a wireless technology standard for exchanging data over short distances using short-wavelength UHF radio waves in the industrial, scientific and medical radio bands. It was created in 1994 by Ericsson to replace cables connecting devices like mobile phones, laptops, printers, and other electronic devices. Bluetooth allows for wireless connections between various devices to share information and transmit data wirelessly over short distances of around 10 meters. It uses a radio technology called frequency-hopping spread spectrum to handle interference and improve communication quality.
Presentation on 1G/2G/3G/4G/5G/Cellular & Wireless TechnologiesKaushal Kaith
This Presentation is explaining all about the Generations of Mobile or Cellular Technology (1G/2G/2.5/ 3G/4g/5G). This explain the invented details ,features,drawbacks,look of wireless models and comparison and evolution of technology from 1G to 5G and also explaining about wireless application and their services.
This document discusses wireless local area networks (WLANs) and provides recommendations for setting one up. It covers various wireless devices that can connect to a WLAN, advantages of wireless over wired connections like freedom of movement. It recommends using 802.11g adapters for best value and performance. The document provides guidelines on choosing wireless equipment, installing accessories like routers and adapters, configuring the network, and setting security measures like encryption.
This document outlines the key aspects of web crawling including the motivation, behavior, policies, scheduling, architecture, history, and practical issues of web crawlers. It notes that 5 exabytes of new information are added to the web per year, most directories no longer encourage site submission, and the bandwidth required for comprehensive crawling is expensive, making efficient crawling essential.
Intelligent web crawling
Denis Shestakov, Aalto University
Slides for tutorial given at WI-IAT'13 in Atlanta, USA on November 20th, 2013
Outline:
- overview of web crawling;
- intelligent web crawling;
- open challenges
Bluetooth is a wireless technology standard for exchanging data over short distances between fixed and mobile devices, creating personal area networks (PANs). It was created in 1994 by telecom vendor Ericsson. Bluetooth operates in the unlicensed 2.4 GHz short-range radio frequency band, using a frequency hopping spread spectrum technique to avoid interference. It defines a packet-based protocol with a master-slave structure, where one master communicates with up to 7 slaves in a piconet. Piconets can be connected to create larger scatternets. Bluetooth supports both point-to-point and point-to-multipoint connections.
The document discusses authentication protocols and digital signatures. It describes mutual authentication protocols that allow two parties to verify each other's identities and exchange session keys. It also discusses one-way authentication protocols. The document focuses on explaining the Digital Signature Standard (DSS) and the Digital Signature Algorithm (DSA). It provides details on how DSA uses public/private key pairs to generate and verify digital signatures for authenticating messages and senders.
The document discusses different types of telecommunications carriers and service providers. It describes Incumbent Local Exchange Carriers (ILECs) like AT&T and Verizon that operate as regulated monopolies, as well as Competitive Local Exchange Carriers (CLECs) that compete with ILECs. It also mentions multi-system operators (MSOs) that operate cable television systems, and various organizations and independent sales agents that sell services from telecom carriers.
I am 3rd year BE CSE student and I am more involved in the technology Augmented and virtual reality,and in future I wish to join and work in a company working in the same domain.At present I am indulged in learning process and doing projects on the same domain.
VIRTUAL SURROUNDING FACE GEOCASTING IN WIRELESS AND ADHOC SENSOR NETWORKSSiva Subramaniyan
The document proposes a new algorithm called Virtual Surrounding Face Geocasting (VSFG) to improve geocasting in wireless ad hoc and sensor networks. VSFG combines greedy face routing, face traversal, and restricted flooding using a dominating set to deliver messages to all nodes within a target region with guaranteed delivery, low transmission cost, and reduced collisions. It works in three steps: 1) forwarding the message to the boundary of a virtual surrounding face, 2) traversing the face boundaries bidirectionally, and 3) restricted flooding within the region using a dominating set.
This document summarizes Bluetooth technology. It discusses Bluetooth architecture including piconets and scatternets. It outlines several Bluetooth profiles for different applications. The document also covers advantages like eliminating wires, disadvantages like short range, security aspects, current applications, and the future scope of Bluetooth technology.
Bluetooth is a short-range wireless technology that was originally developed as a cable replacement for connecting devices. It allows for data exchange between fixed and mobile devices over short distances. Bluetooth operates in the unlicensed 2.4 GHz band and can connect up to seven devices in a piconet, with higher level scatternets supporting more devices. Advantages of Bluetooth include eliminating wires, enabling ad hoc networks, being standardized and free of charge. Disadvantages include short range, less security, and interference potential with other devices. Future versions of Bluetooth aim to improve capabilities such as security, data rates, power reduction and range.
This document provides instructions for setting up a wireless ad hoc network between two Windows 7 laptops to share files and internet access. The key steps are:
1. Create an ad hoc wireless network on one laptop and configure a WPA2 security key.
2. Join the ad hoc network from the other laptop and verify both laptops receive IP addresses on the same subnet.
3. Browse and share files between the laptops using the wireless connection.
4. Optionally, one laptop can share its wired internet connection by configuring its Ethernet interface for sharing. This allows the other laptop indirect internet access over the ad hoc wireless network.
The document discusses the roles of computers in a network as peers, clients, or servers. It also describes different network models including peer-to-peer networks (workgroups), server-based networks (domains), and hybrid networks. Peer-to-peer networks have no central server and every computer is a peer. Server-based networks divide tasks between servers that provide services and clients that request them. Hybrid networks contain elements of both peer-to-peer and server-based networks.
Ad hoc wireless networks allow devices to connect and communicate with each other without a centralized access point. Nodes in an ad hoc network relay messages through intermediate hops to reach destinations. Examples include Bluetooth networks and wireless mesh networks. Issues in ad hoc networks include medium access control, routing with mobility and bandwidth constraints, and providing quality of service guarantees.
This document discusses personal area networks (PANs). It defines a PAN as a network used for communicating among devices within a few meters of an individual. There are two main types of PANs: wired and wireless. Wireless PANs (WPANs) use technologies like infrared, HomeRF, and Bluetooth. Bluetooth has become the dominant WPAN standard. The document discusses WPAN device types, implementation issues, standards, differences from wireless local area networks, and applications of PANs in areas like education, healthcare, transportation and more.
Types of Computer Networks bba 1st sem.pptxPankaj Chandel
There are various types of computer networks available. We can categorize them according to their size as well as their purpose.
The size of a network should be expressed by the geographic area and number of computers, which are a part of their networks. It includes devices housed in a single room to millions of devices spread across the world.
Some of the most popular network types are:
PAN
LAN
MAN
WAN
The document discusses intranets and wireless networks. It defines an intranet as a private network within an organization that uses Internet standards like HTML and TCP/IP. Wireless networks allow devices to connect without wires using radio waves. Different types are described, including wireless PANs, LANs, WANs and cellular networks. Benefits of wireless networks include mobility, convenience and easy setup while avoiding wiring costs, but they can be subject to interference.
A wireless personal area network (WPAN) connects devices within a small area wirelessly, usually within 10 meters of each other. WPANs use radio frequency or infrared technology instead of wired cables. Common WPAN standards include Bluetooth, IEEE 802.15.1, and Zigbee. They allow devices like phones, headphones, cameras, and computers to connect and exchange files and data without wires. WPANs operate at low power over short ranges and complement wireless local area networks that can replace wired networks over a larger area.
9 November 1877 – 21 April 1938) was a South Asian Muslim writer,[1][2] philosopher,[3] scholar and politician,[4] whose poetry in the Urdu language is considered among the greatest of the twentieth century,[5][6][7][8] and whose vision of a cultural and political ideal for the Muslims of British Raj[9] was to animate the impulse for Pakistan.[1][10] He is commonly referred to by the honorific Allama[11] (from Persian: علامہ, romanized: ʿallāma, lit. 'very knowing, most
9 November 1877 – 21 April 1938) was a South Asian Muslim writer,[1][2] philosopher,[3] scholar and politician,[4] whose poetry in the Urdu language is considered among the greatest of the twentieth century,[5][6][7][8] and whose vision of a cultural and political ideal for the Muslims of British Raj[9] was to animate the impulse for Pakistan.[1][10] He is commonly referred to by the honorific Allama[11] (from Persian: علامہ, romanized: ʿallāma, lit. 'very knowing, most
The document discusses developments in computer networks and communications. It defines a computer network and how interconnected devices can communicate. Mobile computing allows wireless and portable access to networks through devices like laptops and smartphones. The document also describes different types of networks including personal area networks (PANs), virtual private networks (VPNs), wireless local area networks (WLANs), and WiMAX networks for broadband wireless access. New technologies continue to enhance mobile computing and internet access.
WLAN allows devices to connect to the internet and each other wirelessly using radio waves or infrared signals. It provides flexibility, portability, mobility, and ease of installation compared to wired networks. Common applications of WLAN include use in medical, education, temporary situations, airlines, and emergency centers. WLANs operate in either ad hoc mode for direct peer-to-peer connections or infrastructure mode which uses an access point to connect to other networks. Technologies used include infrared, radio waves that comply with FCC regulations, and microwaves. WAP allows access to internet content and services on mobile devices by compressing web pages for smaller screens.
The document provides an overview of the history and development of computer networks from the 18th century to present day. It specifically discusses ARPANET, the first wide-area packet switched network developed in the late 1960s that served as a prototype for today's Internet. The document also defines different types of computer networks including PAN, LAN, MAN, and WAN, and describes common network hardware devices such as hubs, switches, routers, and gateways.
The document provides an overview of computer networking concepts including:
- Common network types such as LANs, WANs, and wireless networks.
- Network devices such as switches, routers, and firewalls that connect nodes and control data flow.
- Communication protocols like TCP/IP that define rules for exchanging information over networks.
- Network topologies like bus, star, and mesh that determine the physical layout and connections between nodes.
The document provides an overview of computer networking concepts including:
- Common network types such as LANs, WANs, and wireless networks.
- Network devices such as switches, routers, and firewalls that connect nodes and control data flow.
- Communication protocols like TCP/IP that define rules for exchanging information over networks.
- Network topologies including bus, star, and mesh configurations that determine how nodes are physically connected.
The document provides an overview of computer networking concepts including:
- Common network types such as LANs, WANs, and wireless networks.
- Network devices such as switches, routers, and firewalls that connect nodes and control data flow.
- Communication protocols like TCP/IP that define rules for exchanging information over networks.
- Network topologies like bus, star, and mesh that determine the physical layout and connections between nodes.
cpct NetworkING BASICS AND NETWORK TOOL.pptrcbcrtm
The document discusses computer networking concepts including network types (LAN, WAN, MAN, etc.), components (switches, routers, firewalls, etc.), protocols (TCP/IP, Ethernet, etc.), and uses. It provides details on common network devices, media (wired and wireless), and advantages of networking such as simultaneous access and easier data backup. Network diagrams and definitions of key terms are also included to explain networking fundamentals.
introduction to computer Network-20210426203825 (1).pptgauravgoswami78
The document discusses computer networking concepts including network types (LAN, WAN, MAN, etc.), components (switches, routers, firewalls, etc.), protocols (TCP/IP, Ethernet, etc.), and uses. It provides details on common network devices like switches, routers, and firewalls. It also covers network media like wired (copper cable, fiber optic) and wireless and network protocols like TCP/IP, Ethernet, and wireless LAN standards.
The document provides an overview of computer networking concepts including:
- Common network types such as LANs, WANs, and wireless networks.
- Network devices such as switches, routers, and firewalls that connect nodes and control data flow.
- Communication protocols like TCP/IP that define rules for exchanging information over networks.
- Network topologies including bus, star, and mesh configurations that determine how nodes are physically connected.
This document provides an overview of computer networks. It defines what a computer network is and describes common network types like LANs, WANs, and wireless networks. It also discusses network devices like switches, routers, and firewalls. The document outlines different network media like wired and wireless connections. It explains common communication protocols including TCP/IP and Ethernet. Finally, it defines various network types such as personal area networks, local area networks, campus area networks, and storage area networks.
The document discusses computer networks and networking concepts. It begins by outlining the course content, which includes network types, uses of networks, network media, threats, and cloud computing. It then defines what a computer network is and describes common networking devices like switches, routers, and firewalls. The document discusses different network types including LANs, WANs, MANs, and VPNs. It also covers topics like network protocols, wireless networks, and network media such as copper cable, fiber optic cable, and wireless.
Networks are categorized based on their geographic span. A LAN connects devices within a single location like an office or building using fast networking media over short distances. A WAN spans multiple locations, is generally slower, and more expensive, connecting multiple LANs. A MAN covers an area larger than a LAN but smaller than a WAN, like a university campus or city. Wireless networks use infrastructure topologies with access points to connect to wired LANs, or ad-hoc topologies to directly connect devices without access points. Common wireless standards include 802.11, Bluetooth, and infrared.
This document provides an introduction to basic computer network concepts. It defines what a computer network is and describes different types of networks including LAN, MAN, WAN, PAN and CAN. It explains the differences between these networks in terms of geographical area covered, ownership, design/maintenance and communication medium used. The document also discusses network topologies like bus, star, ring and mesh. It describes common network devices, applications of networks for resource and information sharing, and different types of servers in a client-server network model.
1. A
SEMINAR ON
PERSONAL AREA NETWORK(PAN)
Submitted To:
Mr. RAHUL MATHUR
ECE, SLBS, JODHPUR
Submitted By:
Naveen Vyas
ROLL NO. 10ESLEC034
B.TECH. IV year ECE(B2)
2. CONTENTS
1.INTRODUCTION
2.WHAT IS PAN?
5. Implementation Issues For PAN
6. The Standards Issues Relating To WPANs
7.NEW AND LATEST RESEACH PAPER ON PAN
8. Differences Between WPANs And WLANs
4. WPAN Devices.
9. Where and How Can WPANs Be Used In Education?
11.Advantages and Disadvantages & APPLICATIONS
3.Types Of Wireless PAN’s Are Currently Available.
3. INTRODUCTION
• A computer network is a system for communicating
between two or more computers and associated devices
• A popular example of a computer network is the internet,
which allows millions of users to share information
• Computer networks can be classified according to their
size:
– Personal area network (PAN)
– Local area network (LAN)
– Metropolitan area network (MAN)
– Wide area network (WAN)
•A PAN is a network that is used for communicating among
computers and computer devices (including telephones) in close
proximity of around a few meters within a room.
4. What is PAN?
Personal Area Network
. A personal area network (PAN) could be thought of as the interconnection of devices within
the range of an individual person and nowadays typically uses wireless technology (WPAN).
. It can be used for communicating between the devices themselves, or for connecting to a larger
network such as the internet , Devices are normally within 1-10m
•PAN’s CAN BE TWO TYPES-
• WIRED
• WIRELESS
7. A Connected Small Office
T1, T3, …
Edge Server
Phone
Small
Business
Server
Ethernet
Internet Bluetooth
802.11
8. Enterprise
• Information at
your fingertips
– At meetings, in the office, on
the road
– Reliable, secure, multimedia
LAN
T1, T3, …
Proxy Server
802.11
IrDA
GPRS
Web Server
Ethernet
GPRS
Bluetooth
GPRS
Internet
9. An ISP Connected Public Space
• Discovery of proximity
services (flight schedules at
airport, mall directories, …)
T1, T3, …
Proxy Server
802.11
Phone
Bluetooth
IrDA
GPRS
Web Server
Ethernet
Internet
10. Types of Wireless Personal Area Networks are
currently available?
1.INFRARED
2.HomeRF (home radio frequency)
3.BLUETOOTH
INFRARED:1.Infrared technology is probably the best known and
most mature WPAN technology. Communication takes
place between two devices that are in line of site of
each other.
2.This means that if an object obstructs the
infrared path between the two devices the network
link will fail. Thus, infrared technology is unsuitable
for WPAN use unless both devices can be placed
close together and kept relatively static
11. INFRARED(CONTD..)
-Infrared technology has drawbacks it does have several advantages
including:
1.A relatively high data rate when compared to other WPAN
technologies (currently up to 4Mbps)
2.Being free from interference from radio technologies
3.Being cheap to install in devices
4.A lack of complicated addressing issues between devices
Infrared technology can be found in a range of devices including
PDAs, mobile phones, laptops and remote controls.
12. HomeRF (home radio frequency)
HomeRF technology can still be found in such devices as
keyboards, future development work on HomeRF products has
now stopped and thus it is unlikely that devices with this technology
will feature strongly in future WPANs.
BLUETOOTH
1.Bluetooth is a short range wireless
technology endorsed by major technology
companies and has now been accepted as
the IEEE 802.15.1 standard.
2.Bluetooth utilises the 2.45GHz radio
band and supports data rates of up to
780Kbps.
14. BLUETOOTH(CONTD..)
3. This technology was originally designed for short range wireless
connectivity between two devices replacing traditional wired solutions
and unlike infrared there doesn't have to be a clear line of sight
between Bluetooth devices.
4. Options include using Bluetooth in the same way as WLANs are used
over a distance of up to 100 metres (although data rates of Bluetooth
are significantly lower (~780Kbps)).
5.All Bluetooth devices have a minimum set of functionality that will
allow them to locate another Bluetooth device
15. 4.WPAN devices are there?
There are many devices currently on the market that have a
WPAN technology built in to them. PDAs, mobile phones and
laptops can all be bought that have inbuilt WPAN technology
(usually Bluetooth or Infra-red).
5. Implementation issues for PAN?
It is important to be clear and realistic about the tasks and
types of use for which WPANs are appropriate and those for
which they are not.
16. How easy is it to establish a PAN network?
In the case of infrared, sending data from one device to the next
usually requires the user to set the device to allow incoming infrared
beam requests.
Once another device comes in range of a network and attempts
to send data a network is established.
In the case of Bluetooth, a device is set so that it actively tries to
discover other Bluetooth devices or is set to a mode that allows
itself to be discovered by all other Bluetooth devices or chosen
devices (this depends on the manufacturer of the device though).
A network is established when a device that is seeking
another device locates another Bluetooth device.
17. In both WPAN technologies, once a network is established a
receiving device normally has to wait for the user to actively
accept incoming data before it can be viewed or stored.
Using WPAN features to connect a device to the internet:
This is another common use for WPAN especially amongst
those people who spend time away from their fixed network
connection point. A connection to the internet is made by a
WPAN device (normally a mobile phone) via GSM/GPRS.
A WPAN is then formed from this device to another
Bluetooth enabled device such as a laptop. In this way the user
can use the laptop to wirelessly gain access to the internet.
18. 6. What are the standards issues relating to WPANs
One of the main standards bodies for WPAN technologies is the IEEE
(Institute of Electrical and Electronic Engineers). This is the same body
that governs the 802.11 (Wi-Fi) standards. WPAN technology standards
governed by the IEEE come under the 802.15 umbrella.
IEEE 802.15.1
IEEE 802.15.2
IEEE 802.15.3
IEEE 802.15.3a
IEEE 802.15.4
19. 7.NEW AND LATEST RESEACH PAPER ON WPAN.
A new generation of Wireless Personal Area Networks (WPANs) is intended for high
data rate and multimedia applications. The MBOA WPAN system, which is
standardized by the Multiband OFDM Alliance (MBOA), is able to provide data rates
up to 480Mb/s over a short distance based on the Ultra-Wideband (UWB) frequency
band as well as support the Quality of Service (QoS) for both synchronous and
asynchronous traffic.
The MBOA system has been considered as one of the most potential solutions for
the Physical layer (PHY) and Medium Access Control (MAC) of the next generation of
WPANs. In addition to the high PHY data rates, the MBOA system provides also high
MAC efficiency, especially for the high speed burst transmission and frames of small
size .
20. 20
Broadband
wired &
wireless
wired &
wireless
wired &
wireless
Long range delivery
wired & wireless
wired &
wireless
wired &
wireless
Local high throughput
delivery
UWB Application Range
All this existing technologies can be replace with UWB tech
21. 8. Differences Between WPANs and WLANs.
The goal for WPANs is replacing wires between objects
that are close to each other and have a short range.
Wireless Local Area Networks (WLANs) are used as wireless
replacements for traditional Ethernet type networks and
currently have a greater data rate and range than most
WPANs.
WLANs are often associated with portable devices such
as laptops this type of network is often not considered to
be as portable as WPANs.
22. Ideally, WPANs should complement WLANs but there is
inevitably some overlap in the technologies.
For example, Bluetooth devices can be purchased that
can form a WPAN with other devices that are located within
a few metres or connected to a WLAN from distances up to
100m.
23. 9. Where and how can WPANs be used in education?
One of the common features of WPANs is that they aim to make
creating a network easy to do. Thus, WPANs often mean immediate
deployment of a dynamic network.
Examples of how WPANs can be useful within an educational
setting include:
•Exchanging information directly between PDAs
•Synchronising files between a desktop PC and a PDA
•Connecting a keyboard or mouse wirelessly to a desktop
computer
•Printing a document using a WPAN enabled printer and laptop
•Connecting a WPAN enabled mobile phone to a laptop to use the
Internet via GSM/GPRS whilst doing fieldwork.
•Dynamic network creation for group work using WPAN enabled
devices.
24. 11.Advantages and Disadvantages & APPLICATIONS.
WPANs have a number of key
advantages when used in an educational
environment:
•Dynamic network setup
•Usually quick and relatively simple to set up.
•WPAN enabled devices are usually portable.
•Typically need less technical skills to deploy
than LANs or WLANs.
25. General (rather than specific to educational use)
disadvantages of WPANs include:
•Typically have a limited range.
•Currently limited to relatively slow data rates when compared with
WLAN technologies.
•Compatibility and interoperability issues; WPAN technologies are not
usually compatible with each other. Some WPAN technologies such as
Bluetooth are known to have had interoperability issues between
devices from different manufacturers
•Devices with inbuilt WPAN technologies can be
considerably more expensive than devices without WPAN
technologies.
26. APPLICATIONS
In Medical & Hospitals
In railways and Airports station
In Organization and Companies
In Schools and College Education
In Defence And Military
In Home, Office & Small Industries
27.
28. WPAN Future
• Human body carries electrical signal
– Signal is low and unnoticeable by users
– Signal can carry data
– Information can be shared by users
– Electronic business cards
29. CONCLUSION & FUTURE DIRECTION
Just in time for the first year of
the real new millennium i.e., 2001-2100. The P802.15
Working Group is paving the way for Personal Area
Network Standards that will be - Networking the
World TM.
Wireless personal area networks will proliferate early
in the next millennium and the IEEE P802.15 Working
Group for Wireless Personal Area Networks
(WPAN’s) is providing the leadership in the IEEE 802
Standards Committees to establish open standards for
these WPAN’s
30. REFERENCES
G. R. Hiertz, Y. Zang, J. Habetha and H. Sirin, „Multiband OFDM
Alliance – The next generation of Wireless Personal Area Net-works”,
Proceedings of the IEEE Sarnoff Symposium 2005, Princeton, New
Jersey, U.S., Apr. 2005
A. Batra, J. Balakrishnan, G. R. Aiello, J. R. Foerster and A. Dabak,
„Design of a multiband OFDM system for realistic UWB channel
environments”, Microwave Theory and Techniques, IEEE
Transactions on Volume 52, Issue 9, Sept. 2004 Page(s):2123 - 2138
http://grouper.ieee.org/groups/802/15/index.html