Which graphical packet capture and protocol analysis tool captures live traffic or reads capture files and decodes protocols in detail?

Which graphical packet capture and protocol analysis tool captures live traffic or reads capture files and decodes protocols in detail?

• A. TDR
• B. arp
• C. Light Meter
• D. Wireshark

Answer: (D)

Wireshark is a graphical packet analyzer that captures live network traffic or opens capture files and then decodes the traffic protocol by protocol, showing the detailed fields of each layer. This lets you see exactly what’s happening in a communication—Ethernet, IP, TCP/UDP, and application protocols like HTTP, DNS, or TLS—down to the individual bytes. You can inspect how a handshake unfolds, what data is exchanged, and how streams are reassembled, which is essential for troubleshooting, security analysis, and performance tuning. The other options don’t provide this capability: a Time Domain Reflectometer locates faults in cables, ARP is simply a protocol for address mapping, and a light meter measures physical light. So the best tool for graphical capture and in-depth protocol decoding is Wireshark.

Wireshark is a graphical packet analyzer that captures live network traffic or opens capture files and then decodes the traffic protocol by protocol, showing the detailed fields of each layer. This lets you see exactly what’s happening in a communication—Ethernet, IP, TCP/UDP, and application protocols like HTTP, DNS, or TLS—down to the individual bytes. You can inspect how a handshake unfolds, what data is exchanged, and how streams are reassembled, which is essential for troubleshooting, security analysis, and performance tuning. The other options don’t provide this capability: a Time Domain Reflectometer locates faults in cables, ARP is simply a protocol for address mapping, and a light meter measures physical light. So the best tool for graphical capture and in-depth protocol decoding is Wireshark.