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COMPUTER NETWORKS - II

OXALISS INTERNATIONAL SCHOOL (CBSE ), THATCHUR Mrs. GOMATHI M M.TECH., B.Ed., PGT / COMPUTER SCIENCE

NETWORK DEVICES

To communicate data through different transmission media and to configure networks with different functionality, we require different devices like Modem, Hub, Switch, Repeater, Router, Gateway, etc. Computer Network Devices (youtube.com)

ETHERNET CARD

• (^) Ethernet card, also known as Network Interface Card (NIC card in short) is a network adapter used to set up a wired network. It acts as an interface between computer and the network.

RJ

RJ 45 or Registered Jack-45 is an eight-pin connector that is used exclusively with Ethernet cables for networking.

An Ethernet hub (Figure 10.11) is a network device used to connect different devices through wires. Data arriving on any of the lines are sent out on all the others

SWITCH

A network switch connects network devices (printers, computers, and wireless devices/access points, and enables users to exchange data packets.

GATEWAY

• (^) A gateway is a node considered as the entrance point to other networks, so that different networks can communicate with each other.
• (^) It connects different network follows different protocols and different properties.
• (^) Gateway can be any software, hardware or combination of both.
• (^) Gateway can acts as a proxy server or firewall.
• (^) Generally Router is used as Gateway device in Computer Network.

BRIDGE

A network bridge is a device that divides a network into segments. Each segment represent a separate collision domain, so the number of collisions on the network is reduced. Also, because each collision domain has its own separate bandwidth, a bridge also improves the overall network performance.

NETWORK PROTOCOLS

Network Protocols - YouTube