October 3, 2023
October 3, 2023
October 3, 2023
###### JNU PhD CS 2019
October 3, 2023
 Question 3
If two communicating stations X and Y are linked through two intermediate routers, r1 and r2; then determine the number of times each packet visits Network Layer (NL) and Data Link Layer (DLL) for single transmission from X to Y.
 A NL – 4, DLL – 4 B NL – 4, DLL – 3 C NL – 4, DLL – 6 D NL – 2, DLL – 6
Question 3 Explanation:
Each router will contain two DLL since it has two interfaces and one network layer. Each host or station will contain one network layer and one data link layer. So the total no. of data link layer will be 2(from stations) + 4(from routers) = 6. No. of network layers will be 2(from stations) + 2(from routers) = 4.
Question 3 Explanation:
Each router will contain two DLL since it has two interfaces and one network layer. Each host or station will contain one network layer and one data link layer. So the total no. of data link layer will be 2(from stations) + 4(from routers) = 6. No. of network layers will be 2(from stations) + 2(from routers) = 4.