Sckc | Network Topology | Section 6 Chapter 32

Front 1

What is a Local Area Network?

Back 1

Several computing devices located on a singlesite/ building connected together via cables.

Front 2

Explain what a bus topology is?

Back 2

A network that uses a single cable to connectcomputers together.

Front 3

What arethe advantages of a bus topology?

Back 3

• Inexpensiveto install (Doesn’t require additionalhardware)
  
• Newdevices easily added (With no networkdisruption)
• Wellsuited for small network (That don’trequire high speeds)
  

Front 4

What are the disadvantages of a bus topology?

Back 4

• Whenthe main able fails, the whole network goes down
• Limitationon cable length
• Inheavy traffic, performance degrades
• Lowsecurity – All devices see traffic
  

Front 5

What does CSMA/CD stand for?

Back 5

CollisionSense Multiple Access with Collision Detection

Front 6

Explain the principles of CSMA/ CD.

Back 6

Iftwo devices are transmitting at the same time, the carrier sense scheme detectsand both devices will stop transmitting. They then both wait for a random time,before trying to re-transmit.

Front 7

What is a star topology?

Back 7

A type of network in which all the devices are connected to one central device.

Front 8

What are the advantages of the star topology?

Back 8

• Each device can transmit at different speeds
• Constant performance, even under load
• No collision of data
• System is more secure; Each message can only be viewed by the device it was intended for
• Simple to add new stations
• If one cable malfunctions, it only takes down that device instead of the whole network

Front 9

What are the disadvantages of the star topology?

Back 9

• If the central device goes down, the whole network goes down
• Maybe more costly to install; Extra cables