Computer networks 1st class
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I do not have any questions. This document provides an introduction to computer networks including basic concepts, goals of networking, a course outline on networking topics, a brief history of computer networks, definitions of what a computer network is, goals of computer networks, applications of computer networks, and network hardware and software components.
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Classification of computer networks
This document classifies and describes different types of computer networks:
- Personal area networks (PANs) connect devices within 10 meters and include mobile devices and laptops.
- Local area networks (LANs) connect computers within a small area like a school or office building covering up to 1 kilometer. Data is stored on a central server.
- Metropolitan area networks (MANs) connect computers across an entire city or campus within a 10 kilometer range using protocols like Frame Relay and fiber optic cables.
- Wide area networks (WANs) connect local networks across states and countries using technologies like telephone lines and radio waves, and are widely used in business and education to share files among users.
Hub, switch, router, bridge, Network Equipment
This document provides information about common networking devices:
- A hub physically connects devices on a local area network (LAN) but cannot detect MAC addresses or improve network performance.
- A switch can detect specific connected devices by MAC address, perform error checking, and improve network performance compared to a hub.
- A router operates at the network layer and is used to connect local area networks, detecting both IP addresses and MAC addresses.
- A bridge and repeater both operate at the data link layer, with a bridge able to filter by MAC address and connect two LANs using the same protocol, while a repeater regenerates weak signals on the same network.
Hardware and network project
This document outlines a 2-hour professional development training for K-12 teachers to learn about hardware, networks, and their impact on classroom instruction. The training will include a lecture on basic computer parts and operating systems, networks and their types, and advantages of school networks. Teachers will then discuss these topics in groups and complete an assessment test. Special needs of participants will be addressed to help all teachers understand.
GRE & Computer Network.
This document discusses computer networks and their components. It begins by defining a computer network as a set of devices connected through communication channels or links. It notes that networks allow devices like computers and printers to interact. The document then lists some common network components like NICs, switches, cables, hubs, and routers. It provides more detail on NICs, explaining that they have a MAC address and support transfer rates up to 1000 Mbps. The document concludes by thanking the reader.
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Mountain High School has around 800 students and 45 staff members. It aims to utilize technology to improve engagement. Its computer network includes a local area network connecting all classrooms and facilities on campus through Ethernet cables. This LAN is connected to the district's wide area network and the Internet through the school's router and connection to an Internet service provider. Key hardware includes network interface cards, Ethernet jacks, cables, switches, and a router. The network allows students and staff to access the Internet, library resources, and printers. Some rooms also have wireless connectivity for certain devices.
Open Systems Interconnection
The OSI model is a conceptual framework that characterizes computing functions into a set of rules to support interoperability between networking systems. It divides network communication processes into seven smaller layers - physical, data link, network, transport, session, presentation, and application layer. Each layer has a specific role like the physical layer deals with transmission of raw bits, the network layer handles routing between devices, and the application layer supports programs that use the network. The model allows networks with different hardware and software to communicate in a standard way.
Networks Topology
Topology defines the structure and interconnections of network components. There are two types: physical topology depicts the geometric layout, while logical topology shows the signal pathways regardless of physical structure. Common network topologies include bus, star, ring, and tree, with each having advantages like cost-effectiveness, easy troubleshooting, and reliability, but also disadvantages such as cable requirements, single point of failure, or difficult reconfiguration.
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Classification of computer networks
This document classifies and describes different types of computer networks:
- Personal area networks (PANs) connect devices within 10 meters and include mobile devices and laptops.
- Local area networks (LANs) connect computers within a small area like a school or office building covering up to 1 kilometer. Data is stored on a central server.
- Metropolitan area networks (MANs) connect computers across an entire city or campus within a 10 kilometer range using protocols like Frame Relay and fiber optic cables.
- Wide area networks (WANs) connect local networks across states and countries using technologies like telephone lines and radio waves, and are widely used in business and education to share files among users.
Hub, switch, router, bridge, Network Equipment
This document provides information about common networking devices:
- A hub physically connects devices on a local area network (LAN) but cannot detect MAC addresses or improve network performance.
- A switch can detect specific connected devices by MAC address, perform error checking, and improve network performance compared to a hub.
- A router operates at the network layer and is used to connect local area networks, detecting both IP addresses and MAC addresses.
- A bridge and repeater both operate at the data link layer, with a bridge able to filter by MAC address and connect two LANs using the same protocol, while a repeater regenerates weak signals on the same network.
Hardware and network project
This document outlines a 2-hour professional development training for K-12 teachers to learn about hardware, networks, and their impact on classroom instruction. The training will include a lecture on basic computer parts and operating systems, networks and their types, and advantages of school networks. Teachers will then discuss these topics in groups and complete an assessment test. Special needs of participants will be addressed to help all teachers understand.
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This document discusses computer networks and their components. It begins by defining a computer network as a set of devices connected through communication channels or links. It notes that networks allow devices like computers and printers to interact. The document then lists some common network components like NICs, switches, cables, hubs, and routers. It provides more detail on NICs, explaining that they have a MAC address and support transfer rates up to 1000 Mbps. The document concludes by thanking the reader.
Transmission Mode (Simplex, Half Duplex, Full Duplex), Device, Switch, Hub, R...
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Device
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Mountain High School has around 800 students and 45 staff members. It aims to utilize technology to improve engagement. Its computer network includes a local area network connecting all classrooms and facilities on campus through Ethernet cables. This LAN is connected to the district's wide area network and the Internet through the school's router and connection to an Internet service provider. Key hardware includes network interface cards, Ethernet jacks, cables, switches, and a router. The network allows students and staff to access the Internet, library resources, and printers. Some rooms also have wireless connectivity for certain devices.
Open Systems Interconnection
The OSI model is a conceptual framework that characterizes computing functions into a set of rules to support interoperability between networking systems. It divides network communication processes into seven smaller layers - physical, data link, network, transport, session, presentation, and application layer. Each layer has a specific role like the physical layer deals with transmission of raw bits, the network layer handles routing between devices, and the application layer supports programs that use the network. The model allows networks with different hardware and software to communicate in a standard way.
Networks Topology
Topology defines the structure and interconnections of network components. There are two types: physical topology depicts the geometric layout, while logical topology shows the signal pathways regardless of physical structure. Common network topologies include bus, star, ring, and tree, with each having advantages like cost-effectiveness, easy troubleshooting, and reliability, but also disadvantages such as cable requirements, single point of failure, or difficult reconfiguration.
COMPUTER NETWORK
Computer networks allow computers and devices to connect and share resources. There are three main types of networks - local area networks (LANs) which connect devices in a small geographic area like a home or office, metropolitan area networks (MANs) which connect devices in a city or town, and wide area networks (WANs) which connect devices across large geographic areas like countries. Network topology refers to how computers are arranged and connected in a network, with common topologies including bus, star, and ring configurations.
Using computer networks as facility to share information
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This document discusses the four main types of computer networks: local area networks (LANs), personal area networks (PANs), metropolitan area networks (MANs), and wide area networks (WANs). LANs connect computers within a small area like a building using technologies like Ethernet. PANs connect personal devices within 30 feet of an individual. MANs interconnect multiple LANs within a larger area like a city using technologies like Frame Relay. WANs extend over large geographical areas like states or countries using technologies like fiber optic cables and satellites.
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A network consists of two or more computers linked together to share resources. Computers can be connected through cables, wireless connections, or infrared light beams. There are two main types of networks: a local area network (LAN) which connects computers within a small area, and a wide area network (WAN) which connects networks across larger geographic areas.
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Network Topology
The document discusses different network topologies including bus, ring, star, tree, mesh, and hybrid topologies. It describes the key characteristics of each topology such as their advantages and disadvantages. It also defines common networking devices like hubs, switches, routers, repeaters, and brouters explaining their basic functions.
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This document provides an overview of computer network classification. It discusses four main types of computer networks:
1) Local Area Network (LAN) which connects devices within a small physical area like a home, office, or school.
2) Metropolitan Area Network (MAN) which connects devices within a larger area like a city or campus.
3) Personal Area Network (PAN) which connects devices centered around an individual person's workspace.
4) Wide Area Network (WAN) which connects multiple LANs over a broad geographic distance using technologies like telephone lines or satellites.
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Chapter – 1
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2. The document then discusses peer-to-peer and client-server networks as well as common topologies like bus, star, and ring. It also covers the TCP/IP model and layers, addressing, routing, and flow control in networks.
3. Examples of network types, applications, and switching techniques are given. Comparisons between top
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The document discusses computer networks and data communication. It defines a computer network as connecting two or more computers together to share resources. Data communication is the transfer of information between a source and receiver. Networks use various mediums like cables, radio frequencies, and fiber optics to transmit data. Common networks include local area networks (LANs) that connect devices within a small area, metropolitan area networks (MANs) that connect LANs within a city, and wide area networks (WANs) that connect LANs across large geographical areas. The document also discusses social networks, peer-to-peer file sharing, webinars, and podcasts as examples of sharing information over computer networks.
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This note is about the basic introduction of computer networks. It contains a detailed description of computer network, ARPANET, goals of computer network, application of computer network and details about networking hardware & software components.
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A network connects two or more computers to share data and resources electronically. It allows computers to communicate through devices like routers, cables, switches, and servers. Key components of a school network include servers, switches, routers, firewalls, and an internet connection from the district office to individual schools and classrooms. A network in a classroom helps teachers and students share files, access the internet, use online tools for attendance and grading, and communicate via email or phones.
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This document discusses the four main types of computer networks: local area networks (LANs), personal area networks (PANs), metropolitan area networks (MANs), and wide area networks (WANs). LANs connect computers within a small area like a building using technologies like Ethernet. PANs connect personal devices within 30 feet of an individual. MANs interconnect multiple LANs within a larger area like a city using technologies like Frame Relay. WANs extend over large geographical areas like states or countries using technologies like fiber optic cables and satellites.
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This document discusses internet connections and protocols. It explains that an internet connection requires a computer, telephone line, modem, and internet service provider (ISP). The ISP maintains the user's account using a unique username and password. Common web browsers like Chrome, Firefox, and Internet Explorer are used to access websites by entering URLs. Protocols like TCP/IP, HTTP, HTTPS, FTP, Telnet, and SMTP allow devices to communicate over the internet and transfer files and emails. TCP/IP breaks data into packets and ensures intact delivery. HTTP is used for communication between web servers and clients, while HTTPS provides security. FTP transfers files, Telnet enables remote login, and SMTP transfers emails between systems.
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This document provides an overview of a data communications course, including information about the professor, textbook, lecture notes, and course outline. It covers topics like the definition of data communications, the five components of a data communication system, direction of data flow (simplex, half-duplex, and full-duplex), different network types (LAN, MAN, WAN, internetwork), physical network topologies (mesh, star, bus, ring, hybrid), categories of networks, a brief history of the Internet, protocols, standards and standards organizations.
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This document provides an introduction to computer networks. It defines data communication as the exchange of data between two devices via transmission medium. It presents a simplified data communication model including the message, sender, medium, receiver, and protocol. It explains that point-to-point communication is not practical for distant or large sets of devices, so a communications network is used instead. Networks allow for better connectivity, communication, sharing of resources, and overcome geographic limits to access remote data with the goal of universal communication between any devices. Networks can also be classified based on transmission media, size, management method, and topology.
Classification computer network
This document provides an overview of computer network classification. It discusses four main types of computer networks:
1) Local Area Network (LAN) which connects devices within a small physical area like a home, office, or school.
2) Metropolitan Area Network (MAN) which connects devices within a larger area like a city or campus.
3) Personal Area Network (PAN) which connects devices centered around an individual person's workspace.
4) Wide Area Network (WAN) which connects multiple LANs over a broad geographic distance using technologies like telephone lines or satellites.
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This document discusses various networking protocols and technologies. It describes common network protocols like IP, TCP, UDP, FTP, and HTTP that define rules for communication between devices. It also explains protocols like DHCP that assign IP addresses and AppleTalk for Apple networks. The document outlines different internet connection types including dial-up, DSL, Wi-Fi, and defines the World Wide Web as a system of interconnected sites that allows sharing of text, images and other media through the internet. It provides brief descriptions of common internet tools for email, messaging, file transfer, cloud computing, telephony, video conferencing and online discussion forums.
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Data communication involves transmitting data over communication lines like telephone or cable lines. The basic elements of any communication system are a sender who creates the message, a medium that transmits the message, and a receiver who receives the message. A computer network is a collection of connected computers and devices that allows users to communicate with each other and share resources. The main benefits of a computer network are communication between users anywhere in the world at low cost, sharing of resources like printers and scanners, sharing of software stored centrally, and sharing of data between authorized users on the network.
Communication through computer networks
The document discusses communication and computer networks. It defines communication as the transfer of messages between a sender, message, medium, and receiver. It then defines computer networks as interconnections between computers over small or large geographic areas using wires or wireless. It proceeds to discuss different types of communication channels for wired (twisted pair cable, coaxial cable, optical fiber cable) and wireless (infrared, Bluetooth, Wi-Fi) networks. It also defines local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs) based on their geographic coverage and provides examples. Finally, it briefly discusses LAN topologies, intranets, and extranets.
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This lecture covers data communication and networks. It defines data communication as the exchange of information between entities using a transmission medium. The textbook and key terms are introduced. The history of data communication from the telegraph to modern networks is discussed. Components of a data communication system include messages, senders, receivers, medium, and protocols. Local and remote data communication are defined. The lecture concludes with definitions of additional terms like session and node.
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The ARPANET was the first wide-area packet switching network and helped establish the TCP/IP protocol suite that became the technical foundation for the Internet. A computer network connects computers together to share resources like access to the Internet, printers, or file servers. Computer networks aim to share resources, improve performance, ensure reliability, increase scalability, and provide security. Common applications of computer networks include business, communication, e-commerce, home automation, and mobile use.
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Note1
1. ARPANET was the first wide-area packet switching network and helped establish the TCP/IP protocol, laying the foundation for the modern Internet.
2. A computer network connects computers together to share resources like access to the Internet, printers, and file servers. The Internet itself can be considered a large computer network.
3. The goals of computer networks are to share resources between connected computers, ensure high performance for multiple users, provide reliability through alternative data communication paths, increase scalability by adding more processors, and provide security to protect data from unauthorized access.
PST SC015 Chapter 3 Internet Technology (I) 2017/2018
This document discusses network topologies. It describes the bus, star, and ring network topologies. In a bus network, all computers and devices connect to a single central backbone cable. Data travels along the cable in both directions to all devices, but each device only accepts data addressed to it. Advantages are low cost and easy addition/removal of devices. A disadvantage is a cable break disables the whole network. Star and ring topologies are also introduced. The document focuses on network fundamentals including concepts, architectures, and layouts.
UNIT 4 computer networking powerpoint presentation .pdf
This document provides an overview of computer networking concepts. It defines a computer network as multiple computers connected together to share information and resources. The document discusses different types of networks including LAN, MAN, WAN and internetworks. It describes key network features like performance, reliability, security and expandability. The document also covers network topologies, advantages and disadvantages of networks, and provides examples of mesh, star, tree and bus topologies.
Introduction to Networks & Networking Concepts
The document provides an overview of computer networks and networking concepts. It defines what a computer network is, discusses the key components of networks including hardware, software, media and design. It also covers different types of networks like LANs, WANs and MANs. The document discusses peer-to-peer and client-server network models and the roles of clients, servers and network services. It provides examples of specialized servers like file servers, mail servers and web servers. Finally, it discusses factors to consider when selecting the right type of network.
Networking Fundamentals.ppt
This document provides an overview of networking fundamentals including network history, topologies, protocols, and devices. It discusses the evolution of networks from standalone computers connecting via modems to today's large networks. It describes common network topologies like bus, star, and ring. The document outlines the OSI and TCP/IP models and explains the functions of common networking devices like hubs, bridges, routers, and gateways. It also covers wired media like coaxial cable and fiber optic cable as well as wireless networking standards.
CSIT108 Module-2.ppt
This document discusses computer networks and their components. It defines a computer network as a collection of connected computers and devices that allows users to share hardware, software and data. The document outlines the key components required for a network, including network interface cards, hubs, switches, routers, and wireless access points. It also discusses the advantages of resource sharing and file sharing through networks, as well as some disadvantages like security issues and virus spreading.
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Management information system. Computer network , network in large companies. TCP/IP , functions of the modem, types of network , client server vs peer to peer. the internet and the internet technology ,
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The OSI model defines a framework for network communication consisting of 7 layers: physical, data link, network, transport, session, presentation, and application layer. Each layer has a specific function and communicates with its corresponding layer in another computer through defined protocols. The OSI model aims to guide network engineers and developers in building robust and interoperable networks and applications.
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Simplex, half duplex, and full duplex are three types of data transmission modes in computer networks. Simplex mode allows data transmission in one direction only, half duplex allows data flow in two directions but only one direction at a time, and full duplex allows simultaneous two-way transmission between two nodes. The document provides an overview of different transmission modes in computer networks for educational purposes.
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Computer hardware refers to the physical parts of a computer system, including components like the central processing unit, monitor, keyboard, and mouse. Firmware is a type of software that provides instructions stored in hardware like a computer's BIOS to operate the hardware. Software is comprised of programs and applications like operating systems, office suites, and web browsers that are run by computer hardware using instructions from firmware.
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This document provides information about common networking devices:
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This document classifies and describes different types of computer networks:
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Syllabus
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Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
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Computer networks 1st class
- 1. Computer Networks 1st Class Lesson Title Introduction to Computer Networks: Basic concept of Computer networks Goals of networking Pranab Bandhu Nath Senior Lecturer CSE Department City University, Dhaka E-mail: bandhutuhin@gmail.com web: www.ictdictionary.com Facebook Page: facebook.com/bandhutuhin YouTube: www.youtube.com/bandhutuhin
- 2. Computer Networks Syllabus • Please Follow the Course Outline. Here I will show you the advanced network syllabus as well. By following this course outline you can work professionally in any Networking industries. • Physical Layer- Cables, topology, Transmission modes, Encoding, Lan, Devices, Modulation • Data Link – Mac Protocols, Switches, Ethernet frame, Error Control Stop and wait, Go Back and selective Repeat. • Network- IPV4, IPV6,IP Addressing, Routing Protocols, IPV4 and IPV6 Header, • Transport- UDP, Headers, TCP • Session • Presentation • Application • Network Security
- 3. Computer Network History 18th Centuries: Watt's Steam Engine. Optical Telegraph. ... The Lightning Rod. 19th Centuries: Telegraph – 1837,Telephone - 1876. Electric Battery - 1800.Camera – 1888 Typewriter - 1867. 20th Centuries: Radio ,Television, The Personal Computer. Information Gathering, Processing and Distribution 21st Centuries: Satellites, Fiber Optics, Internet
- 4. What is Computer Network? • A computer network is a set of computers connected together for the purpose of sharing resources. The most common resource shared today is connection to the Internet. Other shared resources can include a printer or a file server. The Internet itself can be considered a computer network
- 5. Goals of Computer Network • Sharing Resources from one Computer to another Computer over a network • Performance by measuring the speed of data transmission with number of users, connectivity and the software used • Reliability makes easy to use an alternative source for data communication in case of hardware failure or connectivity issues • Scalability increases the system performance by adding more processors • Security is the main characteristics of Computer network where you can take necessary steps for protecting your data from unauthorized access
- 6. Application of Computer Network • Business Applications • Communication Medium • e-commerce • Home Applications • Electronic commerce • Mobile Users
- 7. Network Hardware & Software • There are two component of Computer Network • 1. Hardware Equipment 2. Software 3. Cables and Connectors Hardware: NIC, Server, Client, Peers, Transmission, Medium, Router, Bridge, Hub, Switches, Gateway, Repeaters Software: Network Operating System, Protocols Switches (TCP/IP, OSI) Cables and Connectors: Twisted pair cable Coaxial cable Fiber-optic cable
- 8. "Do you have any questions?"