Ping Command Parameters for Troubleshooting MTU Issues
Question
Which two ping command parameters would be used to troubleshoot MTU issues? (Choose two.)
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.AD
The correct answers for the question are A. ping <destination> size and D. ping <destination> do-not-fragment.
Explanation: MTU stands for Maximum Transmission Unit, which is the largest packet size that can be transmitted over a network without being fragmented. MTU issues can cause problems with network performance and connectivity, especially when trying to transmit large amounts of data.
To troubleshoot MTU issues using the ping command, you can use the following parameters:
A. ping <destination> size: This parameter allows you to specify the packet size that will be sent in the ping request. By default, the ping command sends packets of 56 bytes. However, if you suspect an MTU issue, you can increase the packet size until the ping request fails. The maximum packet size that can be sent without being fragmented is the MTU size of the network path between the source and destination. For example, if the MTU size is 1500 bytes, you can use the command "ping <destination> size 1472" to send packets of 1472 bytes (1500 - 28 bytes for IP and ICMP headers).
D. ping <destination> do-not-fragment: This parameter sets the "do not fragment" flag in the IP header of the ping request. This means that if the packet size exceeds the MTU size of any network path along the way, the router will drop the packet and send an ICMP message back to the sender indicating that fragmentation is required. By using this parameter, you can determine if the MTU size is causing packet loss or connectivity issues.
C. ping <destination> verbose: This parameter provides additional information about the ping request, such as the round-trip time and the number of packets lost. However, it does not help in troubleshooting MTU issues.
B. ping <destination> rapid: This parameter sends ping requests as quickly as possible, which can help identify packet loss or latency issues. However, it does not help in troubleshooting MTU issues.
Therefore, the correct answers are A. ping <destination> size and D. ping <destination> do-not-fragment.
