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Summary A* 9618/ 9608 Chapter 2: Communication
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In-depth notes on paper 1 of the CIE 9618 Computer Science A Level/ AS Level. Revised off only my concise notes to achieve my A*. Covers chapter 2
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2 CommunicationNetworks
State which topology would be used as part of a wireless network
A star topology - all devices are connected through a central Wireless
Access Point (WAP) which broadcasts signals.
LANS:
Devices connected over a small geographical area
Uses dedicated/company-owned infrastructure
LAN hardware:
Cables (aka network media)
Copper /coaxial
Fibre Optic
Much faster transmission (than ethernet)
Signals don’t fade
Transmission at speed of light
Expensive
Easily damaged (delicate + not robust)
Difficult installation
Ethernet/ twisted pair
Most common in LAN
Cheap
Easy to install
Bend and manipulate
Robust
Hub
2 Communication 1
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