What is the private IP address range for Class B?

• A. 10.0.0.0 through 10.255.255.255
• B. 172.16.0.0 through 172.31.255.255
• C. 192.0.0.0 through 192.0.0.255
• D. 198.51.100.0 through 198.51.100.255

Answer: (B)

Private IPv4 addresses are reserved for use inside local networks. There are three blocks defined for private use: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. For Class B private addressing, the range is 172.16.0.0 to 172.31.255.255 because the /12 subnet includes all addresses from 172.16.x.x up to 172.31.x.x. This is specifically the private block assigned to Class B networks. The other options either belong to other private classes (like 10.0.0.0.0/8) or are not private ranges at all (for example, 192.0.0.0/24 and 198.51.100.0/24 are reserved/test/documentation ranges).