msk mbt sbn hst wmk
255 /32 0 - -
254 /31 2(128) 0 1
252 /30 4(64) 2 3
248 /29 8(32) 6 7
240 /28 16(16) 14 15
224 /27 32(8) 30 31
192 /26 64(4) 62 63
128 /25 128(2) 126 127
  • msk=last octet of sub.mask ex. 255.255.255.192
  • mbt=mask bit sbn=1st subnet address(how many on network)
  • hst=number of hosts
  • wmk=wildcard mask (last octet) ex. 0.0.0.63

Using binary notation it is easy to wrote this table upside-down.

  • sbn = 256 - msk
  • number of subnets = 256 / sbn
  • hst = sbn - 2
  • Wildcard mask = sbn - 1

Einfach nötig sonst wirds knapp mit der Zeit bei ICND 1 und 2 ;) Gefunden auf The Legendary 5 Minute Courses

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