JN0-102 · Question #204
When using the monitor traffic command on Junos devices, which UNIX-based utility is accessed?
The correct answer is B. tcpdump. The monitor traffic operational command on Junos devices is an interface to the tcpdump utility, allowing administrators to capture and display network packets that traverse an interface. This is a powerful tool for network analysis and troubleshooting.
Question
When using the monitor traffic command on Junos devices, which UNIX-based utility is accessed?
Options
- Asnoop
- Btcpdump
- Cmonitor
- Dtail
How the community answered
(25 responses)- A4% (1)
- B88% (22)
- C8% (2)
Why each option
The `monitor traffic` operational command on Junos devices is an interface to the `tcpdump` utility, allowing administrators to capture and display network packets that traverse an interface. This is a powerful tool for network analysis and troubleshooting.
`snoop` is a packet capture utility commonly found on Solaris systems, not typically used or wrapped by Junos for `monitor traffic`.
The `monitor traffic` command in Junos OS is a wrapper for the well-known `tcpdump` utility, which is a powerful command-line packet analyzer. It allows users to capture, display, and analyze network traffic flowing through a specific interface.
`monitor` is part of the Junos command set but is not the underlying UNIX utility itself; `monitor traffic` uses `tcpdump`.
`tail` is a UNIX command used to output the last part of files; it is not a packet capture utility.
Concept tested: Junos packet capture utility
Source: https://www.juniper.net/documentation/us/en/software/junos/system-management/topics/topic-map/monitor-traffic-packet-capture.html
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