Which of the following summarized subnets is not a valid summary that - ProProfs
     

Which of the following summarized subnets is not a valid summary that includes subnets 10.1.55.0, 10.1.56.0, and 10.1.57.0, mask 255.255.255.0?



A. 10.0.0.0 255.0.0.0
B. 10.1.0.0 255.255.0.0
C. 10.1.55.0 255.255.255.0
D. 10.1.48.0 255.255.248.0
E. 10.1.32.0 255.255.224.0

This question is part of

CCENT/CCNA ICND2 CHAPT. 4 & 5

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1 Answer

John Smith

John Smith

Answered on Sep 08, 2016

10.1.55.0 255.255.255.0-2. 10.1.48.0 255.255.248.0-10.0.0.0 255.0.0.0 implies a range of all addresses that begin with 10, and 10.1.0.0 255.255.0.0 implies a range of all addresses that begin with 10.1, so both these answers include all the address ranges listed in the question. 10.1.32.0 255.255.224.0 implies a range of 10.1.32.010.1.63.255, which includes all addresses listed in the question. 10.1.55.0 255.255.255.0 implies a range of only 10.1.55.010.1.55.255, which does not include all addresses. 10.1.48.0 255.255.248.0 implies a range of 10.1.48.010.1.55.255, which omits two of the subnets listed in the question.

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