Question

Which of the following IP address can be used as a loop-back address?

• A. 255.255.255.255
• B. 127.0.0.1
• C. 0.0.0.0
• D. 255.255.255.0

Hint:

Always remember that **127.0.0.1** is the reserved loopback address in IPv4, commonly used to test network connectivity locally.

Answer 1

The Correct Option is B

The loopback address facilitates a computer sending network traffic to itself. For IPv4, the standard loopback address is 127.0.0.1.- 127.0.0.1 is the most frequent loopback address, designating the local machine.- 255.255.255.255 functions as the broadcast address, enabling messages to be sent to all network devices.- 0.0.0.0 is designated as the default route address.- 255.255.255.0 is a subnet mask, not a loopback address.Step 2: Conclusion.
The definitive loopback address is 127.0.0.1, utilized for testing network applications on the local machine. Consequently, the accurate response is (2) 127.0.0.1.