Computer Networks and the Internet

Question 1

What is packet switching?

Answer 1

A method where end systems exchange messages by breaking long messages into smaller chunks called packets

Question 2

What are the two predominant types of packet switches?

Answer 2

• Routers
• Link-layer switches

Question 3

What is store-and-forward transmission?

Answer 3

A method where a packet switch must receive the entire packet before it can begin to transmit the first bit onto the outbound link

Question 4

In a simple network with a router, what must the router do before transmitting a packet?

Answer 4

Buffer the entire packet’s bits after receiving them

Question 5

Fill in the blank: In packet switching, messages can contain _______.

Answer 5

[data or control functions]

Question 6

True or False: The router can start transmitting bits before it receives the entire packet.

Answer 6

False

Question 7

What is the role of a router in a packet-switching network?

Answer 7

To switch incoming packets onto outgoing links

Question 8

What does it mean for a router to ‘process’ a packet?

Answer 8

To analyze and route the packet before forwarding it to the next link