200-301 Question 91
Select 3A company is configuring a private network for its internal systems and wants to use private IPv4 addressing. Which of the following IP addresses can be used within their private network?
- A
192.168.10.15
- B
10.0.0.254
- C
172.16.5.1
- D
203.0.113.5
- E
8.8.8.8
Show answer and explanation
Correct answers: A, B, C
Explanation
Private IPv4 addresses are defined in RFC 1918 and fall within specific ranges: 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255. These addresses are reserved for private use and cannot be routed on the public internet. Options 192.168.10.15, 10.0.0.254, and 172.16.5.1 fall within these ranges and are thus valid choices for private networks.
- A. Correct.
192.168.10.15 is part of the private IP range 192.168.0.0 to 192.168.255.255, which is reserved for private use.
- B. Correct.
10.0.0.254 falls within the private IP range 10.0.0.0 to 10.255.255.255, making it valid for internal networks.
- C. Correct.
172.16.5.1 is part of the private IP range 172.16.0.0 to 172.31.255.255, which is designated for private use.
- D. Incorrect.
203.0.113.5 is part of the public IP address space and is not designated for private use. It is part of the TEST-NET-3 block used for documentation.
- E. Incorrect.
8.8.8.8 is a public IP address used by Google's public DNS servers and cannot be used in a private network.