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13 Cards in this Set

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What is a Network
A network is a group of computers connected together
What does a Network allow computers to do?

Communicate


Share files


Share software


Share peripherals

LAN


Local Area Network




A network which spreads across one geographical site.

WAN


Wide Area Network




A network which spreads across multiple geographical sites.

Hardware to connect a LAN

Network cards


Cables


Server


---------------------------------------------


Wireless access points


Wireless transmitters/receivers


Sever

Hardware to connect WAN

Modem to send/receive the data


Telephone lines or satellites



Network Security

LANs are said to be more secure as they are far less subject to interception




A wireless connection is much less secure than a wired connection

Serial Transmission

Transmits data between devices one bit at a time down a single wire

Parallel Transmission
Transmits multiple bits of data using more than one wire

Simplex

Data is only ever sent in one direction

(Full) Duplex

When data is sent in both directions

Half Duplex

Data can be passed in both directions but only one direction at a time

Bit rate

The number of bits that can be sent in one second