A router has two FastEthernet interfaces and needs to connect to four vlans in the local network. How can you accomplish this task, using the fewest physical interfaces and without decreasing network performance?
A.
Add two more FastEthernet interfaces.
B.
Add a second router to handle the vlan traffic.
C.
Use a hub to connect the four vlans with a FastEthernet interface on router.
D.
Implement a router-on-a-stick configuration.
I have checked the answer to this question on several sites/dumps and they all say D is correct. However, in a Router-On-Stick scenario, the network may face congestion problems on the sub-interface as it if now feeding four networks and hence, this will affect network operation performance. I think every one is neglecting the “without decreasing the network performance” phrase, so I believe the correct answer is A. Although the question also says “using the fewest physical interfaces” and some may still believe D is correct. Yes, D gives you the fewest number of ports, but does it give you no performance affected? How do you know how many hosts hanging off each sub-interface, what if 1000 host per network? Sameway, A doesn’t give you the minimum number of interfaces (4 is actually the maximum!!). Ideas?