The IP address, 178.22.90.1, is considered to be in which class of
address?

A.
Class D

B.
Class C

C.
Class A

D.
Class B

Explanation:
The class A address range is 1.0.0.0 to 126.255.255.255. The class B
address range is 128.0.0.0 to 191.255.255.255. The class C address
range is from 192.0.0.0 to 223.255.255.255. The class D address range
is 244.0.0.0 to 239.255.255.255, and is used for multicast packets.
Sources: Designing Network Security by Merike Kaeo (Cisco Press,
1999) and CCNA Study Guide by Todd Lammle, Donald Porter, and
James Chellis (Sybex, 1999).