click below
click below
Normal Size Small Size show me how
IT3 1: Networks
Topic 1 Networks
Term | Definition |
---|---|
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. |