Q1

Two hosts A and B belong to the same physical network and have IP addresses 80.60.6.55/21 and 80.60.2.114/22, respectively.

• A) A directly communicates with B but B needs a router to reach A.
• B) B directly communicates with A but A needs a router to reach B.
• C) They both can only communicate by means of a router.
• D) A directly communicates with B and viceversa.
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Q2

The smallest aggregation (i.e., the longest prefix) that can contain the IP ranges 100.90.80.32/27 and 100.90.80.40/29 is:

• A) 100.90.80.32/27
• B) 100.90.80.32/26
• C) 100.90.80.32/28
• D) 100.90.80.40/29
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Q3

Identify the only valid Network IP among the following:

• A) 10.20.30.0/22
• B) 30.32.34.36/29