Question

A network administrator has been given a network of 172.16.85.0/21 and wants to know the usable range of IP addresses on that subnet. Which of the following indicates the correct IP address range?A. 172.16.80.0-172.16.85.254B. 172.16.80.0-172.16.88.255C. 172.16.80.1-172.16.87.254D. 172.16.80.1-172.16.85.255

Answer 1

Answer:

The correct answer to the following question will be option C.

172.16.80.1-172.16.87.254

Explanation:

IP Address: IP Address stands for Internet Protocol Address, a unique numerical label allotted to every computer network that are connected to the network of the computer and communicate through the internet protocol.

• An IP address can be separated by periods and having four numbers that are called Octet. Range of IP address can be from 0 to 255.
• We have to keep the first 21 bits and start setting all from the 22nd bit on to 0 (zero).

• To get the suitable and the correct range of the address, we add and subtract 1 from the given broadcast address i.e.,172.16.85.0/21.

So, option C is the right answer and no other option is usable according to the given explanation and the address given by the administrator.