Question: Ping Doesn’t Work in a Simple Network
After reviewing this simple #CCNA question, I wondered if it was too difficult. But it’s a blog – we can always discuss the pieces. Today’s post has a multi-choice question about troubleshooting a seemingly simple problem: two hosts on the same switch, designed to be in the same VLAN, cannot ping each other. The interfaces are up/up – what’s wrong? Question is here today, answers in a few days.
The figure shows a simple small network in which all users should be in the same VLAN. A network engineer just connected to SW1’s console and issued a show interfaces command. The command lists a line status and line protocols status of “up” for both ports F0/7 and F0/8. However, when the user of host A issues a ping command listing host B’s IP address, the ping fails. Choose all answers which, if true, would definitely cause A to not be able to ping B?
A. F0/7 is configured to be in VLAN 2, and F0/8 has no configuration related to its VLAN assignment
B. Host A is configured with IP address 10.1.1.1, and host B is configured with IP address 10.2.2.2
C. A show interfaces vlan 1 command lists a line protocol of administratively down
D. Host A uses mask 255.255.255.0, and host B uses mask 255.255.255.128
E. Port security on SW1’s port F0/7 matches traffic from only one MAC address, namely host A’s MAC address