gcse

Question 1

Explain why the TCP/IP model uses layers

Answer 1

A layer can be changed and removed without effecting other layers

Question 2

Give two reasons why protocols have layers

Answer 2

• Each layer is independent
• One layer can be changed without effecting other layers

Question 3

Definition of layer

Answer 3

A davion of network functionality

Question 4

One advantage of using layers to construct network protocols

Answer 4

• One layer can be taken out to be changed without effecting other layers
• It is self-contained

Question 5

advantages of star topology

Answer 5

• No data collisions can occur
• Cheap
• Reliable as if one device fails then all the others will still work

Question 6

Disadvantages of star topology

Answer 6

• the whole network fails if the switch fails
• a wired star topology requires a lot of cable

Question 7

Advantages of a mesh topology

Answer 7

• multiple connections mean each node can transmit and receive from more than one node at a time
• New nodes can be added without interrupting other nodes

Question 8

Disadvantages of mesh topology

Answer 8

• Many connections require a lot of maintenance
• Hard to set up as high number of connections needed