Using Wireshark filtering, you want to see all traffic except IP address 192.168.142.3. Which of the following is the best command to filter a specific source IP address?

Using Wireshark filtering, you want to see all traffic except IP address 192.168.142.3. Which of the following is the best command to filter a specific source IP address?

• A. ip.src ne 192.168.142.3
• B. ip.src != 192.168.142.3
• C. ip.addr != 192.168.142.3
• D. not ip.src 192.168.142.3

Answer: (A)

The idea is to filter by the source IP and exclude that particular address. Using the source field with a “not equal” operator does exactly that: ip.src ne 192.168.142.3 returns all packets whose source IP is anything except 192.168.142.3, so you see traffic from all other sources. The ne form is a common, clear way to express “not equal” in Wireshark display filters. While ip.src != 192.168.142.3 would also work in many cases, the given expression uses the canonical ne syntax, which is why it’s the best choice here. Using ip.addr != 192.168.142.3 would filter out packets where either end matches that IP, not just the source, and not ip.src 192.168.142.3 lacks proper syntax for the filter language.

The idea is to filter by the source IP and exclude that particular address. Using the source field with a “not equal” operator does exactly that: ip.src ne 192.168.142.3 returns all packets whose source IP is anything except 192.168.142.3, so you see traffic from all other sources. The ne form is a common, clear way to express “not equal” in Wireshark display filters. While ip.src != 192.168.142.3 would also work in many cases, the given expression uses the canonical ne syntax, which is why it’s the best choice here. Using ip.addr != 192.168.142.3 would filter out packets where either end matches that IP, not just the source, and not ip.src 192.168.142.3 lacks proper syntax for the filter language.