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?

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Last Updated on April 13, 2020 by Admin

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:IP 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?

  • 255.255.255.240
  • 255.255.255.0
  • 255.255.255.192
  • 255.255.255.224
  • 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.

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