Cisco 200-125 Exam

Refer to the exhibit. In this VLSM addressing scheme, what summary address would be sent from router A?

  • A. /16
  • B. /20
  • C. /24
  • D. /16
  • E. /17
  • F. /16
Answer: Option A.

Router A receives 3 subnets:, and All these 3 subnets have the same form of 172.16.x.x so our summarized subnet must be also in that form -> Only A, B or.
The smallest subnet mask of these 3 subnets is /18 so our summarized subnet must also have its subnet mask equal or smaller than /18.
-> Only answer A has these 2 conditions ->

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