Q1

Consider a simple network topology in which there are four routers (A, B, C, D). The first 3 are connected to each other in a ring (A-B-C-A), while the fourth is connected to C through a point-to-point link (C-D). If the hosts use a flooding algorithm and router A sends a packet to D, how many copies of the same packet will be delivered to router D?

• A) 1
• B) And proportional to the value of the Time To Live field in the package.
• C) 2
• D) 3
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Q2

A packet with IP address 90.80.70.193 will have a longest match in which of the following lines belonging to a routing table?

• A) 90.80.70.0/25
• B) 90.80.70.0/24
• C) 90.80.70.128/26
• D) 90.80.70.64/26
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