1) Which of the following fields of a packet does a network router extract information from?

a) the network-layer and transport layer fields

b) only the network-layer fields

c) all of the fields of a packet

2) Which of the following does the IP service provide?

a) None, IP is an unreliable service

b) Orderly delivery of segments

c) Guaranteed segment delivery 3) Which of the following services does UDP provide?

a) Integrity checks

b) Process-to-process data delivery

c) Orderly delivery of packets