Interface Information

A

The correct answer to this question is A. show interfaces extensive.

The show interfaces extensive command is used to display detailed information about the status, properties, statistics, errors, and CoS packet counters for all interfaces configured on a Juniper Networks device. This command provides a comprehensive view of the operational status of each interface, including the following:

1. Interface type and name
2. Physical and operational status of the interface
3. Current configuration settings for the interface
4. Input and output traffic statistics, including bytes and packets
5. Error statistics, including CRC errors and framing errors
6. CoS packet counters, including the number of packets in each forwarding class and queue

The show interfaces command, on the other hand, displays a summary of interface information, including the interface name, status, protocol, and input/output packet statistics, but does not provide as much detail as the show interfaces extensive command.

The show configuration interfaces command displays the configuration settings for all interfaces, including the interface type, name, and configuration options, but does not provide any operational status or statistics.

The show interface status command displays a summary of interface status, including the interface name, status, protocol, and input/output packet statistics, but does not provide as much detail as the show interfaces extensive command.

In summary, the show interfaces extensive command is the most appropriate command for viewing detailed interface status, properties, statistics, errors, and CoS packet counters on a Juniper Networks device.