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Juniper JN0-690 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| System Monitoring and Diagnostics | - Logs, traces, and system alarms - Performance and connectivity analysis tools |
| Services and Protocol Troubleshooting | - VPN and tunnel troubleshooting - NAT and firewall filter behavior |
| Interface and Layer 2 Troubleshooting | - VLAN and switching issues - Interface status and error diagnosis |
| Layer 3 Routing Troubleshooting | - BGP troubleshooting - Static routing and route lookup issues - OSPF troubleshooting |
| Routing Policy and Filter Issues | - Filter evaluation and debugging - Policy application and route selection |
| Junos OS Fundamentals and Architecture | - System operation and maintenance basics - Junos OS process architecture and components |
Juniper Junos Troubleshooting Sample Questions:
Question 1
Click the Exhibit button.
-- Exhibit -
May 20 22:27:04.010297 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area 0.0.0.0) May 20 22:27:04.010320 Version 2, length 44, ID 10.10.10.1, area 0.0.0.1 May 20 22:27:04.010342 checksum 0x166d, authtype 0 May 20 22:27:04.010365 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 May 20 22:27:04.010387 dead_ivl 40, DR 192.168.0.2, BDR 0.0.0.0 May 20 22:27:07.891698 OSPF periodic xmit from 192.168.0.1 to 224.0.0.5 (IFL 2684276180 area
0.0.0.0)
May 20 22:27:12.749988 OSPF packet ignored: area mismatch (0.0.0.1) from 192.168.0.2 on intf ge-1/1/2.0 area 0.0.0.0 May 20 22:27:12.750071 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area
0.0.0.0) May 20 22:27:12.750095 Version 2, length 44, ID 10.10.10.1, area 0.0.0.1 May 20 22:27:12.750116 checksum 0x166d, authtype 0 May 20 22:27:12.750139 mask 255.255.255.252, hello_ivl 10, opts 0x12, prio 128 May 20 22:27:12.750161 dead_ivl 40, DR 192.168.0.2, BDR 0.0.0.0 May 20 22:27:14.393182 OSPF rcvd Hello 192.168.0.2 -> 224.0.0.5 (ge-1/1/2.0 IFL 343 area
0.0.0.0) May 20 22:27:14.393262 Version 2, length 44, ID 10.10.10.1, area 0.0.0.0 May 20 22:27:14.393284 checksum 0x0, authtype 0 May 20 22:27:14.393307 mask 255.255.255.252, hello_ivl 50, opts 0x12, prio 128 May 20 22:27:14.393368 dead_ivl 200, DR 0.0.0.0, BDR 0.0.0.0 May 20 22:27:14.393399 OSPF packet ignored: our router ID received from 192.168.0.2 on intf
ge-1/1/2.0 area 0.0.0.0 -- Exhibit -
Referring to the exhibit, which two OSPF adjacency problems are present? (Choose two.)
A. area number mismatch
B. area type mismatch
C. hello interval mismatch
D. duplicate router ID
Question 2
You suspect that your router is missing the .0/24 routes for your local network. You first want to look for the routes on the control plane before troubleshooting the data plane.
Which operational mode command should you issue?
A. show arp
B. show route
C. show route flow validation table
D. show route forwarding-table
Question 3
Which command would be helpful in determining the time at which the protocols started?
A. show system uptime
B. show route
C. show chassis hardware
D. show configuration
Question 4
Click the Exhibit button.
-- Exhibit -user@host > show chassis craft-interface
Front Panel System LEDs: Routing Engine 0 1
OK * . Fail . * Master * .
Front Panel Alarm Indicators:
Red LED .
Yellow LED *
Major relay .
Minor relay *
Front Panel FPC LEDs:
FPC 0 1 2 3 4 5 6 7 8 9
Red . . . . . . . . . . Green * * . . . . . . * * CB LEDs:
CB 0 1
Amber . . Green * *
PS LEDs: PS 0 1 2 3 4 5 6 7 8
Red . . . . . . . . . Green . . . . * * * * *
Fan Tray LEDs: FT 0 1 2 3
Red . . . . Green * * * *
Front Panel SFB LEDs: SFB 0 1 2 3 4 5 6 7
Red . . . . . . . . Green * * * * * * * *
Front Panel Chassis Info: Chassis Number 0x0 Chassis Role S
-- Exhibit -
Referring to the exhibit, which statement is true?
A. Routing Engine 1 is OK, the red LED is lit, and the minor alarm relay is on.
B. Routing Engine 1 has failed, yellow LED is lit, and the major alarm relay is on.
C. Routing Engine 1 is OK, the red LED is lit, and the major alarm relay is on.
D. Routing Engine 1 has failed, yellow LED is lit, and the minor alarm relay is on.
Question 5
Which three commands will provide details about CPU utilization on a line card? (Choose three.)
A. request pfe execute target fpc1 command "show arp"
B. show chassis fpc
C. show chassis hardware
D. request pfe execute target fpc1 command "show thread"
E. request pfe execute target fpc1 command "show sched"
Solutions:
| Question 1 Answer: A,D | Question 2 Answer: B | Question 3 Answer: A | Question 4 Answer: D | Question 5 Answer: B,D,E |
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