Chapter 21
1. C. All the listed answers include the range of all three subnets, except for 10.3.64.0 255.255.224.0, which implies an address range of 10.3.64.0–10.3.95.255. Of the other three answers, 10.3.64.0 255.255.192.0 is the smallest range (10.3.64.0–10.3.127.255). It also happens to be the smallest single summary route that includes all three subnets listed in the question.
2. C and D. 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 of these answers include all the address ranges listed in the question. 10.1.32.0 255.255.224.0 implies a range of 10.1.32.0–10.1.63.255, which includes all addresses listed in the question. 10.1.55.0 ...
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