Cisco 100-105 Exam

Which router command will configure an interface with the IP address 10.10.80.1/19?

  • A. router(config-if)# ip address 10.10.80.1/19
  • B. router(config-if)# ip address 10.10.80.1 255.255.0.0
  • C. router(config-if)# ip address 10.10.80.1 255.255.255.0
  • D. router(config-if)# ip address 10.10.80.1 255.255.224.0
  • E. router(config-if)# ip address 10.10.80.1 255.255.240.0
  • F. router(config-if)# ip address 10.10.80.1 255.255.255.240
Answer: Option D.
Explanation: 

255.255.224 equal /19 in CIDR format hence the answer

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