A network administrator wants to have the same network mask for all networks at a particular small site. The site has the following networks and number of devices: The network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?

IT Questions Bank › A network administrator wants to have the same network mask for all networks at a particular small site. The site has the following networks and number of devices: The network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?

Question:
A network administrator wants to have the same network mask for all networks at a particular small site. The site has the following networks and number of devices:

P phones – 22 addresses
PCs – 20 addresses needed
Printers – 2 addresses needed
Scanners – 2 addresses needed

The network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?

255.255.255.0
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252

Explanation: If the same mask is to be used, then the network with the most hosts must be examined for the number of hosts, which in this case is 22 hosts. Thus, 5 host bits are needed. The /27 or 255.255.255.224 subnet mask would be appropriate to use for these networks.

Exam with this question: CCNA 1 (v5.1 + v6.0) Chapter 8 Exam Answers
Exam with this question: CCNA 1 v7.0 Final Exam Answers