Practice Example #4B: 255.255.254.0 (/23)

Written on 11:36 by Ahmet Emir


  • Subnets? 27 = 128.
  • Hosts? 29 – 2 = 510.
  • Accurate subnets? 256 – 254 = 0, 2, 4, 6, 8, etc., up to 254.
  • Advertisement abode for anniversary subnet?
  • Accurate hosts?

172.16.0.0 = Network address

255.255.254.0 = Subnet mask

Subnet 0.0 64.0 128.0 192.0

First host 0.1 64.1 128.1 192.1

Last host 63.254 127.254 191.254 255.254

Broadcast 63.255 127.255 191.255 255.255

Subnet 0.0 16.0 32.0 48.0

First host 0.1 16.1 32.1 48.1

Last host 15.254 31.254 47.254 63.254

Broadcast 15.255 31.255 47.255 63.255

130 Chapter 3  Subnetting, VLSMs, and Troubleshooting TCP/IP

The afterward table shows the aboriginal bristles subnets, accurate hosts, and advertisement addresses in a

Class B 255.255.254.0 mask:

Subnet 0.0 2.0 4.0 6.0 8.0

First host 0.1 2.1 4.1 6.1 8.1

Last host 1.254 3.254 5.254 7.254 9.254

Broadcast 1.255 3.255 5.255 7.255 9.255

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