Problem 1 and 2 for 2022 exam

Problem 1 and 2 for 2022 exam

par Jiaqi Wang,
Nombre de réponses : 2

Hi, TAs

I have two questions for 2022 exam :

1. For problem 1.3, the ARP packet source and destination IP addresses are N/A in answer. May I ask why they are N/A and if all ARP packets' source and destination IP addresses are not explicit and N/A?


2. For problem 2.2,  there are two solutions depending on the announcements were sent by routers. May I ask that in the exam, do we need to write them both or can make an assumption like B2 announces its route to A2 first, then we can write only one solution which is coherent with the assumption?


   Thank you very much for your reading. 

En réponse à Jiaqi Wang

Re: Problem 1 and 2 for 2022 exam

par Plouton Grammatikos,
Hello,
Regarding your first question, ARP works directly on top of Ethernet. It does not use an IP packet, therefore there is no source and destination IP address on ARP packets. Also see slide 44 of ip1.pdf

Regarding your second question, you should provide all possible solutions (if there are more than one) and justify them.

Best,
Plouton