Wireshark Interview Questions

The following are some interview questions on wireshark which you can expect for a networking interview

1. How would you setup wireshark to monitor packets passing through an internet router

A system on the network can be configured and setup with wireshark. The appropriate port on the switch to which the system and internet router is connected can be configured for port mirroring. All packets passing through the switch interface to the router can be mirrored to the system on which wireshark is setup.
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Ebook – Wireshark Tutorials for Network Administrators


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2. Can wireshark be setup on a Cisco router

Wireshark is an executable. It can be setup on operating systems like windows and linux. It cannot be setup on a Cisco router , as it runs a proprietary operating system on which additional tools or software cannot be installed.

3. Is it possible to start wireshark from command line on Windows

Yes, it is possible to start using the appropriate executable on Windows which is wireshark.exe

4. A user is unable to ping a system on the network. How can wireshark be used to solve the problem.

Ping uses ICMP. Wireshark can be used to check if ICMP packets are being sent out from the system. If it is sent out, it can also be checked if the packets are being received.
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Ebook – Wireshark Tutorials for Network Administrators


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5. Which wireshark filter can be used to check all incoming requests to a HTTP Web server

HTTP web servers use TCP port 80. Incoming requests to the web server would have the destination port number as 80. So the filter tcp.dstport==80.

6. Which wireshark filter can be used to monitor outgoing packets from a specific system on the network.

Outgoing packets would contain the IP address of the system as it’s source address. So assuming that the IP address of the system is 192.168.1.2, the filter would be ip.src==192.168.1.2

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