Q: LAN Switching Logic
To get your #CCENT and #CCNA, you must have the skill to predict how switches forward Ethernet frames. This skill goes beyond a simple generic list of actions like forward/filter/flood. This next question gives you another chance to build those skills by applying those basic rules to another scenario. Enjoy!
The figure shows a small enterprise network. The switches all have default configuration, unless otherwise noted in the question. The PCs have been configured, as well as the routers, so that it is possible for all hosts to ping each other. That also means that all the cabling shown in the figure works, and all interfaces are up.
On the left side of the figure, all switch interfaces default to be in the same VLAN (VLAN 1). Similarly, on the right, all devices sit in the same VLAN (VLAN 2).
Switch SW1 receives an Ethernet frame from host A. This frame is destined for host C, whose MAC address is 0200.CCCC.CCCC. SW1 has all default configuration, and it has not learned any dynamic entries for any tables yet. Host C reacts to the receipt of this first frame by sending back some reply, with that Ethernet frame using host A’s MAC address as the destination MAC address. That 2nd frame arrives back at host A. Which of the following are true statements about interfaces out which this 2nd Ethernet frame (the one sent by host C to host A) will be forwarded? (Note to all: the bold text fixes an original mistake in this post. Frame 1: A sends to C. Frame 2: C sends to A. The question now correctly asks about frame 2.)
A. SW1 F0/1
B. SW1 F0/2
C. SW1 G0/1
D. SW2 G0/2
E. SW2 F0/9
F. SW1 G0/2