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Juniper Junos Troubleshooting Sample Questions:

1. Click the Exhibit button.
-- Exhibit --
user@R1> show configuration interfaces lo0
unit 5 {
family inet {
filter {
input JUNOS;
}
address 5.5.5.5/32;
}
}
user@R1> show configuration firewall family inet filter JUNOS
term term1 {
from {
protocol tcp;
port [ telnet ftp ftp-data snmp ssh syslog http tacacs 64644 1024-65535 ];
}
then {
log;
accept;
}
}
term default {
then {
discard;
} } -- Exhibit -
Referring to the exhibit, which three statements are true? (Choose three.)

A) R1 will drop all BGP packets.
B) R1 will drop all non-TCP transit traffic.
C) R1 will accept telnet traffic.
D) R1 will drop all OSPF packets.
E) R1 will drop all traffic with destination address 5.5.5.5.

2. An interface on your Junos device reports a device-level flag of Loopback-detected.
What is causing this flag to be reported?

A) The link-layer protocol failed to successfully connect with the remote endpoint.
B) The interface link layer received its own frames.
C) The interface is in promiscuous mode and sees frames addressed to all physical addresses on the medium.
D) The interface was administratively disabled.

3. You have configured graceful Routing Engine switchover (GRES) on your device running the Junos OS. Which command would you run to ensure that GRES is functioning properly?

A) Issue the show system switchover command from the backup Routing Engine.
B) Issue the show system switchover command from the master Routing Engine.
C) Issue the show chassis routing-engine command from the master Routing Engine.
D) Issue the show chassis routing-engine command from the backup Routing Engine.

4. You are notified about a router reboot event.
Which command would be helpful in determining the reason for the last reboot?

A) show chassis craft-interface
B) show system snapshot
C) show chassis routing-engine
D) show system reboot

5. Which operational command would be used to display diagnostic data and alarms for 1/10/100 Gigabit Ethernet optical transceivers?

A) show chassis alarms
B) show interfaces diagnostics optics
C) show interfaces controller
D) show interfaces extensive

Solutions: