CCNA Question of the Week

In this weekly series, Jill Liles posts questions and answers to help readers prepare for the CCNA exam.

You work for Global Knowing Ledges. You have configured the addressing for the perimeter router. You used the network 172.16.0.0 255.255.0.0. You subnetted 4 bits. You used the zero subnet. How many subnets were created, and how many hosts per subnet were created?

  1. 14 subnets and 4094 hosts
  2. 4 subnets and 256 hosts
  3. 16 subnets and 4096 hosts
  4. 16 subnets and 4094 hosts
  5. 14 subnets and 4096 hosts

 

The correct answer is D.

This class B address with 4 subnet bits will have a mask of /20 or 255.255.240.0. The 4 subnet bits create 2^4 = 16 subnets. The remaining 12 host bits create (2^12) – 2 = 4094 hosts per subnet.

 

Related Courses:
ICND1 — Interconnecting Cisco Network Devices 1
ICND2 — Interconnecting Cisco Network Devices 2
CCNAX — CCNA Boot Camp v1.1

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