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Chapter 3 - Subnetting and Class C Addresses

Cisco & IP Addressing
Louis D. Rossi, Louis R. Rossi and Thomas Rossi
  Copyright © 1999 The McGraw-Hill Companies, Inc.

Answers
  3.1: 25–2 = 30
  3.2: 26–2= 62
  3.3: There would be no addressing space left for hosts.
  3.4: Given a Class C address, the mask value for:
  a)2-bit mask: 255.255.255.192
  b)3-bit mask: 255.255.255.224
  c)4-bit mask: 255.255.255.240
  d)5-bit mask: 255.255.255.248
  e)6-bit mask: 255.255.255.252
  3.5:
Host Address
Class
Mask
Wire Address
Broadcast Address
194.24.64.78
C
255.255.255.248
194.24.64.72
194.24.64.79
201.10.56.34
C
255.255.255.224
201.10.56.32
201.10.56.63
192.34.23.5
C
255.255.255.252
192.34.23.4
192.34.23.7
210.10.10.134
C
255.255.255.240
210.10.10.128
210.10.10.143
223.12.4.34
C
255.255.255.248
223.12.4.32
223.12.4.39
  3.6:

 


 
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