Subnetting - Technical MCQs

Q1:

On a VLSM network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?

A /27

B /28

C /29

D /30

ANS:D - /30

A point-to-point link uses only two hosts. A /30, or 255.255.255.252, mask provides two hosts per subnet.