Imagine an enterprise network that is composed of 3 branch locations and one main office. Each location has its own LAN and the LANs are interconnected by WAN connections. Also, there are two WAN links that provide the Internet access through an ISP. Answer all questions based on the figure.

-If PC3 transmits an IP packet to the Database Server via R3 and R1, how many different data link source addresses are used before the packet arrives at the Database Server? (Assume that a WAN link also needs a data link address.)
A) 1
B) 2
C) 3
D) 4
E) 5

Question

Imagine an enterprise network that is composed of 3 branch locations and one main office. Each location has its own LAN and the LANs are interconnected by WAN connections. Also, there are two WAN links that provide the Internet access through an ISP. Answer all questions based on the figure.
 
-If PC3 transmits an IP packet to the Database Server via R3 and R1, how many different data link source addresses are used before the packet arrives at the Database Server? (Assume that a WAN link also needs a data link address.)
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Quizplus · Accepted Answer

The data link source address is used to identify the source of a data link frame. In this case, the packet is transmitted from PC3 to the Database Server via R3 and R1. Therefore, the data link source address of PC3 is used on the link between PC3 and R3, the data link source address of R3 is used on the link between R3 and R1, and the data link source address of R1 is used on the link between R1 and the Database Server. Thus, a total of 3 different data link source addresses are used before the packet arrives at the Database Server.

Imagine an Enterprise Network That Is Composed of 3 Branch