312-50V11 · Question #317
When using Wireshark to acquire packet capture on a network, which device would enable the capture of all traffic on the wire?
The correct answer is A. Network tap. A network tap passively copies all traffic on a wire segment, making it the ideal tool for comprehensive packet capture with Wireshark.
Question
When using Wireshark to acquire packet capture on a network, which device would enable the capture of all traffic on the wire?
Options
- ANetwork tap
- BLayer 3 switch
- CNetwork bridge
- DApplication firewall
How the community answered
(33 responses)- A88% (29)
- B3% (1)
- C3% (1)
- D6% (2)
Why each option
A network tap passively copies all traffic on a wire segment, making it the ideal tool for comprehensive packet capture with Wireshark.
A network tap (Test Access Point) is a passive hardware device inserted inline on a network segment that creates an exact copy of all passing traffic and forwards it to a monitoring port. Unlike port mirroring or SPAN, a tap captures every packet bidirectionally without introducing latency or dropping packets under load. This makes it the standard tool for full-fidelity packet capture in professional network analysis.
A Layer 3 switch routes packets between subnets but does not inherently copy all traffic to a capture interface - it would require SPAN port configuration and still may miss traffic on other segments.
A network bridge forwards frames between two network segments based on MAC addresses but does not duplicate traffic to an out-of-band monitoring interface.
An application firewall inspects and filters traffic at Layer 7 but is not designed to passively mirror all wire traffic to a packet capture tool.
Concept tested: Network tap usage for passive packet capture
Source: https://www.wireshark.org/docs/wsug_html_chunked/ChCapCaptureFiles.html
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