A network administrator is designing an IPv4 addressing scheme and requires these subnets. Which combination of subnets and masks will provide the best addressing plan for these requirements?

IT Questions BankCategory: CCNAA network administrator is designing an IPv4 addressing scheme and requires these subnets. Which combination of subnets and masks will provide the best addressing plan for these requirements?
A network administrator is designing an IPv4 addressing scheme and requires these subnets. Which combination of subnets and masks will provide the best addressing plan for these requirements? 1ITExamAnswers Staff asked 8 months ago

Question:
A network administrator is designing an IPv4 addressing scheme and requires these subnets.

1 subnet of 100 hosts
2 subnets of 80 hosts
2 subnets of 30 hosts
4 subnets of 20 hosts

Which combination of subnets and masks will provide the best addressing plan for these requirements?

  • 9 subnets of 126 hosts with a 255.255.255.128 mask
  • 3 subnets of 126 hosts with a 255.255.255.192 mask
    6 subnets of 30 hosts with a 255.255.255.240 mask
  • 3 subnets of 126 hosts with a 255.255.255.128 mask
    6 subnets of 30 hosts with a 255.255.255.224 mask
  • 1 subnet of 126 hosts with a 255.255.255.192 mask
    2 subnets of 80 hosts with a 255.255.255.224 mask
    6 subnets of 30 hosts with a 255.255.255.240 mask

Explanation: VLSM Calculator Online

A network administrator is designing an IPv4 addressing scheme and requires these subnets. Which combination of subnets and masks will provide the best addressing plan for these requirements? 2

IPv4 subnets that require 100 and 80 hosts are provided by creating subnets of 126 usable addresses, each of which requires 7 host bits. The resulting mask is 255.255.255.128.

Subnets that require 30 and 20 hosts are provided by creating subnets of 30 usable addresses, each of which requires 5 host bits. The resulting mask is 255.255.255.224.

Creating nine subnets, each consisting of 126 usable addresses, would waste large numbers of addresses in the six smaller subnets.

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