200-301 Question 92
Select 3A network administrator is designing an internal corporate network using private IPv4 addresses. Which of the following IP address ranges can be used for this purpose?
- A
10.0.0.0 to 10.255.255.255
- B
172.32.0.0 to 172.47.255.255
- C
192.168.0.0 to 192.168.255.255
- D
172.16.0.0 to 172.31.255.255
- E
127.0.0.0 to 127.255.255.255
Show answer and explanation
Correct answers: A, C, D
Explanation
Private IPv4 addresses are defined by RFC 1918 and are used for internal networks. The valid private address ranges are 10.0.0.0 to 10.255.255.255 (Class A), 172.16.0.0 to 172.31.255.255 (Class B), and 192.168.0.0 to 192.168.255.255 (Class C). These addresses are not routable on the public internet and are intended for use within private networks.
- A. Correct.
This is a valid private IPv4 address range defined by RFC 1918 for Class A private networks.
- B. Incorrect.
This range is not part of the private IPv4 address space. The valid range for Class B private addresses is 172.16.0.0 to 172.31.255.255.
- C. Correct.
This is a valid private IPv4 address range defined by RFC 1918 for Class C private networks.
- D. Correct.
This is a valid private IPv4 address range defined by RFC 1918 for Class B private networks.
- E. Incorrect.
This range is reserved for loopback addresses and cannot be used as private IPv4 addresses.