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Juniper JN0-690 Exam Syllabus Topics:

Juniper Junos Troubleshooting Sample Questions:

1. Click the Exhibit button.
-- Exhibit -=================== Bootstrap installer starting =================== Initialized the environment Routing engine model is RE-S-1800x4 Discovered that flash disk = ad0 , hard disk = ad1 mount: /dev/ad1s1f : Invalid argument ERROR: mount_partition: Mount /dev/ad1s1a /mnt failed You are now in a debugging subshell (you may not see a prompt)... # -- Exhibit -
During the boot of your MX480, you see the output shown in the exhibit. Which three statements are true? (Choose three.)

A) Running fsck on the partition might resolve the boot problem.
B) You must swap the Routing Engine over to the backup slot to get it to boot properly.
C) The boot failed because one of the file systems is in an inconsistent state.
D) The Routing Engine cannot mount the partition to complete booting.
E) The boot failed because a USB drive has been inserted into the device.

2. You are asked to provide an audit trail for all user activity on your Junos device.
Which syslog configuration statement accomplishes this task?

A) user * {
any any;
}
file messages {
any notice;
authorization info;
}
B) user * {
any emergency;
}
file messages {
any notice;
authorization info;
}
file interactive-commands {
interactive-commands any;
}
C) user * {
any any;
}
file messages {
any info;
authorization info;
}
D) user * {
any emergency;
}
file messages {
any notice;
authorization info;
}
file audit-commands {
authorization any;
}

3. An OSPF neighbor is stuck in the Exchange state.
Which condition would cause this to happen?

A) a mismatched IP subnet
B) a mismatched area
C) a mismatched MTU
D) mismatched authentication

4. Which three statements are correct about ARP related troubleshooting? (Choose three.)

A) The monitor traffic interface <interface-name> command can be used to watch ARP packets.
B) An individual ARP entry can be cleared using the clear arp hostname command.
C) There are no default ARP policers on any devices running the Junos OS.
D) Most devices that run the Junos OS allow you to specify a manual ARP entry.
E) The clear arp command also clears the IPv6 neighbor cache.

5. Two neighboring routers running OSPF were configured with the same router ID by mistake.
Which OSPF operational mode command would report the number of hello packets received with the local router's router ID?

A) show ospf log
B) show ospf route
C) show ospf statistics
D) show ospf io-statistics

Solutions: