CCENT Question 103: IPv4 ARP Tables

Here’s another #CCENT question that makes you think about both layer 2 and 3. PC1 and PC2 successfully connect to a web server. What ARP table entries should exist at the end of that process?

The Scenario: Question 103

(Ongoing numbering of questions to prevent sanity; you can ignore the number.)

In this scenario, PC4 acts as a web server, with users sitting at PC1 and PC2. The figure shows IPv4 addressing information, and pseudo-MAC addresses (eg, PC1-MAC for PC1’s MAC address).

 Figure 103: Network Used for Question 103

Question

The user at PC1 opens a web browser and successfully connects to the web server hosted at PC4. Immediately afterwards, PC2 does the same. All switch ports are configured to be in the default VLAN 1. Which of the following answers is accurate regarding the contents of the ARP table entries that exist to support the web connection from PC1 and/or PC2? (More than 1 correct answer may exist.)

a)     PC1 ARP table lists 10.1.2.4, MAC PC4-MAC

b)     PC2 ARP table lists 10.1.2.4, MAC R1-G0/0-MAC

c)     SW2 ARP table lists 10.1.1.1, MAC PC1-MAC

d)     PC4 ARP table lists 10.1.2.254, MAC R1-G0/1-MAC

e)     R1 ARP table lists 10.1.1.1, MAC PC1-MAC

f)      R1 ARP table lists 10.1.1.192, MAC is a MAC on SW2