some sample questions below -

Running the tcpdump utility

Following are examples of commands used to run the tcpdump utility:

Selecting an Interface or VLAN

The tcpdump utility’s interface or -i option accepts only one option. This option may be a numbered interface or a named Virtual Local Area Network (VLAN).

To view traffic, use the -i flag as follows:

tcpdump -i <option>

For example:

To view the traffic on a single specific interface:

tcpdump -i 2.1

To view the traffic on a specific VLAN called internal:

tcpdump -i internal