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Q: Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.25.224?

  • 1
    Router(config)#ip classless
  • 2
    Router(config)#ip version 6
  • 3
    Router(config)#ip unnumbered
  • 4
    Router(config)#ip subnet-zero
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Answer : 4. "Router(config)#ip subnet-zero"
Explanation :

Answer: D) Router(config)#ip subnet-zero Explanation: A Class C subnet mask of 255.255.255.224 is 3 bits on and 5 bits off (11100000) and provides 8 subnets, each with 30 hosts. However, if the command ip subnet-zero is not used, then only 6 subnets would be available for use.

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