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EC-Council

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.

Sniffing

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)
  • A
    88% (29)
  • B
    3% (1)
  • C
    3% (1)
  • D
    6% (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.

ANetwork tapCorrect

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.

BLayer 3 switch

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.

CNetwork bridge

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.

DApplication firewall

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

Topics

#Wireshark#network tap#packet capture#traffic sniffing

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