Sem 1 Ch 5
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This document provides an overview of cabling LANs and WANs with three key points: 1. It describes different cabling media like UTP and the straight-through and crossover cables used to connect devices on a LAN. 2. It discusses LAN segmentation using bridges, hubs and switches to reduce collisions and improve performance. Switches allow intelligent forwarding of frames to specific segments. 3. It compares peer-to-peer and client/server network models, noting that client/server scales better and provides more centralized management and security for larger networks.
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Circuit switch network
1) A switched network consists of interconnected switches that create temporary connections between devices linked to the switch. Multiple cables can connect devices to a switch to enable communication.
2) A switch works by flooding frames to all ports initially, then learning MAC addresses of devices and forwarding subsequent frames only to the relevant port, avoiding collisions. In contrast, a hub only floods frames.
3) A circuit-switched network is a set of switches connected by physical links, where each link is divided into channels. It establishes a dedicated connection between stations using one or more links and channels. The connection remains for the duration until one party signals teardown.
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A network switch receives incoming data packets and redirects them to their destination on a local area network (LAN) instead of broadcasting to all devices like a hub. There are two main types of switches - unmanaged switches which cannot be configured and are used for simple networks, and managed switches which provide advanced features like quality of service, remote management, and virtual LANs for larger networks. Layer 2 switches use MAC addresses to segment traffic while layer 3 switches can route between VLANs using IP addresses. Smart switches have some management capabilities but lack advanced features of full managed switches.
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Computer networks allow computers to exchange information by connecting them through a single technology. In a client-server model, more powerful servers store and maintain centralized information, while less powerful clients access information from the server. Peer-to-peer networks have no fixed clients or servers - all computers can communicate directly. Networks can be classified by their transmission technology (broadcast, point-to-point, multicast) and scale (personal area network to wide area network). Common networking devices include repeaters, hubs, bridges, switches and routers that operate at different layers of the networking protocol stack.
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1) A switched network consists of interconnected switches that create temporary connections between devices linked to the switch. Multiple cables can connect devices to a switch to enable communication.
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3) A circuit-switched network is a set of switches connected by physical links, where each link is divided into channels. It establishes a dedicated connection between stations using one or more links and channels. The connection remains for the duration until one party signals teardown.
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A network switch receives incoming data packets and redirects them to their destination on a local area network (LAN) instead of broadcasting to all devices like a hub. There are two main types of switches - unmanaged switches which cannot be configured and are used for simple networks, and managed switches which provide advanced features like quality of service, remote management, and virtual LANs for larger networks. Layer 2 switches use MAC addresses to segment traffic while layer 3 switches can route between VLANs using IP addresses. Smart switches have some management capabilities but lack advanced features of full managed switches.
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Routers are networking devices that forward packets between logical networks. They are used to extend or segment large internetworks and connect TCP/IP networks and local area networks to the Internet. Routers have advanced features for quality of service, traffic filtering, and encryption. Switches offer intelligence beyond basic hubs and can read MAC addresses to selectively forward frames to specific ports. Bridges divide a network into segments and filter traffic between segments based on MAC addresses. Gateways connect networks that use different protocols by operating at the network layer.
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This document provides an overview of computer networks and their basic components. It discusses how networks connect devices like computers, printers and servers to allow sharing of resources. Local area networks (LANs) connect devices within a building, while wide area networks (WANs) span greater distances. The two main types of networks are peer-to-peer and client-server. Client-server networks have centralized data storage on servers for easier management. Network topologies like star, bus and ring determine how data flows. Key network components include network interface cards, hubs, switches, bridges, routers and gateways. The document also describes the CSMA/CD and token ring access methods for transmitting data over the network.
Hcs Topic 4 Networks V2
The document discusses four main types of computer networks: local area networks (LANs), wide area networks (WANs), the Internet, and intranets. It compares the characteristics of these networks such as transmission media, bandwidth, geographical spread, and functions. Common network devices like hubs, switches, and routers are also explained. Legal issues regarding computer networks like privacy, copyright infringement, and data protection are outlined.
Hcs Topic 4 Networks V2
The document discusses four main types of computer networks: local area networks (LANs), wide area networks (WANs), the Internet, and intranets. It compares the characteristics of these networks such as transmission media, bandwidth, geographical spread, and functions. Common network devices like hubs, switches, and routers are also explained. Legal issues regarding computer networks like privacy, copyright, and data protection are outlined.
Hcs Topic 4 Networks V2
The document discusses four main types of computer networks: local area networks (LANs), wide area networks (WANs), the Internet, and intranets. It compares the characteristics of these networks such as transmission media, bandwidth, geographical spread, and functions. Common network devices like hubs, switches, and routers are also explained. Legal issues regarding computer networks like privacy, copyright infringement, and data protection are outlined.
Computer networking
Networking involves connecting two or more computers or electronic devices to share information. The main advantages of networking are the ability to share files, hardware, websites and programs between devices. The main disadvantages include the risk of the entire system crashing if the network server fails and potential slowdowns from high network usage. Common network types are LANs which connect devices in a local area like a home or office, and WANs which connect multiple LANs over a wider area. Key networking hardware includes servers to store and share information, workstations to access the server, and switches, routers and other devices to facilitate communication between devices on the network.
unit5-190409094326.pdf
A hub is a networking device that connects multiple devices on a local area network (LAN). It receives data packets through one port and broadcasts them to all other ports so all connected devices can see the packets. Hubs operate in half duplex mode and have no bandwidth management or collision detection. Switches are more advanced devices that can connect more devices than hubs. Switches have buffers and port-to-MAC address tables that allow them to send frames to specific ports faster than hubs. Routers connect multiple networks like LANs and WANs. Routers use IP addresses to route packets between networks and can run routing protocols to dynamically learn routes.
Network Connecting Devices UNIT 5
Network devices like hubs, switches, and routers connect computers in a network and help manage traffic flow. Hubs broadcast all received data to all ports but have limited bandwidth. Switches can connect more devices than hubs and have features like VLANs. Routers connect different networks and use IP addresses to direct traffic. Other devices like firewalls, VPNs, and IDS/IPS provide network security functions.
An Approach for Enhanced Performance of Packet Transmission over Packet Switc...
With the increased use of real time applications, there is a need for improved network traffic and bandwidth management. Switches are being used by computer networks for enabling connection between those hosts which are not connected by a direct link. When two or more than two host attempt to transmit packet at the same time, collision in data packets occurred. In this paper an optimized performance of local area network in terms of collision count and some other parameter have been investigated using simulation model. Simulation results have been obtained in different network scenarios by varying the number of devices in the network.
Osi model with neworking overview
This document provides an overview of networking concepts including the OSI model layers, network types, and networking devices. It describes the responsibilities and issues handled at each OSI layer, from the physical layer transmitting raw bits to the application layer running application-specific protocols. It also covers topics like addressing schemes, modes of service, and how devices like repeaters, bridges, routers, and gateways operate to connect different network types.
Osimodelwithneworkingoverview 150618094119-lva1-app6892
This document provides an overview of networking concepts including the OSI model layers, network types, and networking devices. It describes the responsibilities and issues handled at each OSI layer, from the physical layer transmitting raw bits to the application layer running application-specific protocols. It also covers topics like addressing schemes, modes of service, and how devices like repeaters, bridges, routers, and gateways operate to connect different network types.
Osimodelwithneworkingoverview 150618094119-lva1-app6892
This document provides an overview of networking concepts including the OSI model layers, network types, and networking devices. It describes the responsibilities and issues handled at each OSI layer, from the physical layer transmitting raw bits up to the application layer. It also covers topics like network addressing, modes of service, and how devices like repeaters, bridges, routers, and gateways operate to connect different networks.
Networking And Telecommunications
The document discusses networking and telecommunications. It provides an overview of network basics including why organizations use networks, advantages of networks over standalone computers, and common network types including local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). It also covers network architectures, topologies, protocols, media, and security considerations.
Computer Networking 2
1. The document provides an overview of computer networking concepts including network topologies, hardware, and protocols. It defines local area networks (LANs), wide area networks (WANs), and metropolitan area networks (MANs). It also discusses network interfaces, switches, hubs, bridges, and routers.
2. The different network topologies - bus, star, ring, and mesh - are explained along with their advantages and disadvantages. Star and bus are most common due to being cheap and easy to install while providing fault tolerance.
3. Switches are more intelligent than hubs and allow each connected device to achieve full bandwidth, while hubs share bandwidth between all devices.
Networking devices
This document discusses different types of internetworking devices used to connect local area networks (LANs). It describes hubs, bridges, switches and routers in increasing order of complexity. Hubs simply repeat and broadcast data to all ports, while bridges learn and filter traffic between connected LANs. Switches operate similarly to bridges but provide dedicated connections for each workstation. Routers connect distinct networks like a LAN to the Internet, and make routing decisions based on IP addresses. The document outlines reasons for interconnecting LANs and the functions of various internetworking devices.
Similar to Sem 1 Ch 5 (20)
An Approach for Enhanced Performance of Packet Transmission over Packet Switc...
An Approach for Enhanced Performance of Packet Transmission over Packet Switc...
Osimodelwithneworkingoverview 150618094119-lva1-app6892
Osimodelwithneworkingoverview 150618094119-lva1-app6892
Osimodelwithneworkingoverview 150618094119-lva1-app6892
Osimodelwithneworkingoverview 150618094119-lva1-app6892
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Sem 1 Ch 5
- 1. CCNA 1 v3.0 Module 5 Cabling LANs and WANs .
- 2. Objectives
- 3. LAN and Physical Layer
- 4. LAN and Physical Layer
- 5. Ethernet Media and Connector Requirements
- 7. UTP Implementation 8 7 6 5 4 3 2 1 Male component
- 8. UTP Implementation Female component JACK
- 9. UTP Implementation Back view of Jack
- 14. Repeaters
- 18. Bridges
- 21. Switches
- 22. Switches
- 26. Peer-to-Peer
- 28. Peer-to-Peer
- 30. Client/Server
- 33. Client/Server
- 37. Routers and Serial Connections
- 38. Routers and Serial Connections
- 41. Routers and DSL Connections
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