Cisco 100-105 Exam

Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three.)

  • A. 10.1.168.0
  • B. 10.1.176.1
  • C. 10.1.174.255
  • D. 10.1.160.255
  • E. 10.1.160.0
  • F. 10.1.175.255
Answer: Option A. C. D.
Explanation: 

All IP address in IP ranges between: 10.1.160.1 and 10.1.175.254 are valid as shown below Address: 10.1.160.0 00001010.00000001.1010 0000.00000000
Netmask:255.255.240.0 = 2011111111.11111111.1111 0000.00000000 Wildcard:0.0.15.25500000000.00000000.0000 1111.11111111

Which implies that –
Network: 10.1.160.0/20 00001010.00000001.1010 0000.00000000
HostMin:10.1.160.100001010.00000001.1010 0000.00000001
HostMax:10.1.175.25400001010.00000001.1010 1111.11111110
Broadcast:10.1.175.25500001010.00000001.1010 1111.11111111

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