Which address range of the first octet is assigned to a TCP/IP class C network?

A.
1-64

B.
64-126

C.
128-191

D.
192-223

Explanation:
Industry Standard Architecture – Student Guide 2 – Page 45
Class Address range Default Subnet IP address Subnet mask
A 1 – 126 Network.host.host.host 255.0.0.0
B 128 – 191 Network.network.host.host 255.255.0.0
C 192 – 223 Network.network.network.host 255.255.255.0