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IT3 1: Networks

Topic 1 Networks

Switch Connects segments of a network together.
Router Reads the addresses of the packets and send them along a selected route.
Hub A common connection point for devices in a star network
Packet-Switching Data (content) split into packets, which can take a different route through network.
Bridge Connects two LANs of t he same type
Gateway Enables LANs to communicate with dissimilar LANs
Firewall Acts as a network filter between a LAN and external network, such as the Internet, to protect against intrusion
Repeater Acts as a signal amplifier for extending network distances
Data Collision Data collision occurs when two sets of data are detected on the network simultaneously
LAN Restricted to a small geographical area, such as a single building, site, or college campus
WAN Geographically distributed, can be world-wide
Client-server A network where several computers are connected to one or more servers, where processing and resources are shared...Preferred choice for large networks
Peer-to-Peer A small network where each computer has the same status, processing is local on a single PC, resources are shared...
Star Topology A Star topology is based around the traditional centralised server. Nodes communicate with the server via a central common connection point, such as a hub, switch or router
Bus Topology based on a single shared cable
Ring Topology The ring topology is a peer-to-peer network as it has no dedicated file server. All stations on the network have the same access rights
User Accounts Users are allocated certain ACCESS rights, which allow you to do certain things on the network
User Log Records successful and failed login attempts. Ensures only authorised users can access a network
Auditing The login procedure provides an audit trail (i.e. Makes a record of all details) of who has used what resources on the system.
Created by: mcounsell