JN0-690 Online Practice Questions and Answers

In the Junos OS, which type of file dumps the program's environment in the form of memory pointers, instructions, and register data to a file in the event of a panic or other serious malfunction?

A. log file

B. backup file

C. configuration file

D. core file

Which statement is correct about troubleshooting?

A. You must always have a complete understanding of the problem before you begin gathering any information.

B. You must be sure the problem will be resolved before attempting a potential solution.

C. The problem must be reproducible before attempting a potential solution.

D. Establishing a network baseline is important to help understand when something is not working.

Which two Junos OS commands are helpful in confirming whether an Object Identifier (OID) has recorded the correct data? (Choose two.)

A. show snmp mib get

B. show snmp statistics

C. show snmp v3

D. show snmp mib walk

A technician has reported an alarm on your device running the Junos OS. You suspect it is due to the temperature in the rack. Which two commands will confirm your suspicion? (Choose two.)

A. show chassis alarms

B. show chassis firmware

C. show chassis hardware

D. show chassis environment

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 was administratively disabled.

C. The interface is in promiscuous mode and sees frames addressed to all physical addresses on the medium.

D. The interface link layer received its own frames.

Which two tools will help determine the path of a routing loop? (Choose two.)

A. traceroute

B. traceoptions

C. routing table data

D. SNMP

You have configured and successfully committed the configuration for nonstop active routing (NSR). Which command would you use to determine if NSR is operating correctly?

A. Use the show system synchronization command on the master and the backup Routing Engines.

B. Use the show task replication command only on the master Routing Engine.

C. Use the show task replication command on the master and the backup Routing Engines.

D. Use the show system synchronization command only on the master Routing Engine.

Click the Exhibit button.

-- Exhibit -user@router> show system users 9:28PM up 2 days, 3:02, 2 users, load averages: 0.06, 0.13, 0.09 USER TTY FROM LOGIN@ IDLE WHAT lab u0 - 9:13PM - -cli (cli) admin p0 10.210.15.30 9:45PM - -cli (cli) -- Exhibit -Referring to the exhibit, which two statements are true? (Choose two.)

A. The admin user is connected through a console session.

B. The admin user is connected through a Telnet or SSH session.

C. Both user sessions will be cleared after issuing the command request system logout terminal.

D. The lab user's session will be cleared after issuing the command request system logout user lab.

Click the Exhibit button. -- Exhibit -user@R1> show route 2.2.2.2

user@R1> show route forwarding-table destination 2.2.2.2

Routing table: default.inet Internet: Destination Type RtRef Next hop Type Index NhRef Netif 2.2.2.2/32 user 1 17.1.1.2 ucst 642 9 xe-1/1/0.0

-- Exhibit -

Referring to the exhibit, which statement is true about transit traffic sent to 2.2.2.2?

A. R1 will discard the packet.

B. R1 will forward the packet.

C. R1 will redirect the packet to the Routing Engine.

D. R1 will reject the packet.

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 traffic with destination address 5.5.5.5.

B. R1 will drop all OSPF packets.

C. R1 will drop all non-TCP transit traffic.

D. R1 will accept telnet traffic.

E. R1 will drop all BGP packets.