JNCIA-ER Preassessment Exam.

1. Which directory is used to store the three most recent configuration rollback files?(A)

A. /config
B. /var/tmp
C. /var/home
D. /config/rollback
2. What will load a factory default configuration onto your router if you do not have access to the router CLI?(D)

A. Press the power button for less than 5 seconds.
B. Press the power button for more than 5 seconds.
C. Press the configuration button for less than 5 seconds.
D. Press the configuration button for more than 5 seconds.
3. Which three daemons are contained in the JUNOS software? (Choose three.)(B C D)

A. VPN
B. Chassis
C. Management
D. Routing Protocol
4. Which CLI command displays the time the router last booted?(D)

A. show time
B. show clock
C. show system boot
D. show system uptime
5. Which represents a valid method for obtaining an IP address during an autoinstallation process?(D)

A. RIP
B. BGP
C. OSPF
D. DHCP
6. Which CLI command displays the hardware currently installed in the router?(C)

A. show chassis alarms
B. show system hardware
C. show chassis hardware
D. show system environment
7. Which two statements regarding the JUNOS software user authentication methods are correct? (Choose two.)(A B)

A. All users must be configured locally on the router.
B. Multiple authentication methods can be configured.
C. Only one authentication method can be configured.
D. Multiple users can authenticate using a common local user account.
8. Which CLI command displays any active alarms on the router?(B)

A. show system alarms
B. show chassis alarms
C. show system environment
D. show chassis environment
9. Which major J-Web menu should you use to send an ICMP echo request packet to a neighboring router?(C)

A. Monitor
B. Manage
C. Diagnose
D. Configuration
10. What is one way to activate the rescue configuration on a J-series router?(C)

A. Issue the load rescue command.
B. Issue the commit rescue command.
C. Issue the rollback 1 command and commit.
D. Issue the rollback rescue command and commit.
11. Why would you apply an import policy to a protocol?(D)

A. to restrict traffic that enters your router
B. to redistribute routes between protocols
C. to modify route properties of routes you send to other routers
D. to modify route properties of routes received from other routers
12. Which CLI command displays the current RIP configuration on a J-series router?(D)

A. show protocols rip
B. show configuration rip
C. show rip configuration
D. show configuration protocols rip
13. To observe trace output on the terminal screen in real time, what command must be executed?(D)

A. debug
B. monitor start
C. terminal monitor
D. Trace file
14. Where do you configure a RIP neighbor in the CLI?(D)

A. under [routing rip neighbor]
B. under [protocols rip neighbor]
C. under [routing rip group "group-name" neighbor]
D. under [protocols rip group "group-name" neighbor]
15. Which J-Web window pane allows you to view and manage licenses?(B)

A. Monitor
B. Manage
C. Diagnose
D. Configuration
16. Which type of routing protocol is RIP?(D)

A. link state
B. path vector
C. policy based
D. distance vector
17. When using the J-Web interface to configure RIP, which two policies are automatically configured by the router? (Choose two.)(C D)

A. Import policy to block RIP routes.
B. Import policy to block direct routes.
C. Export policy to advertise RIP routes.
D. Export policy to advertise direct routes.
18. Where do you configure static routes in the Junos CLI?(D)

A. under [static route]
B. under [protocols static]
C. under [policy-options static]
D. under [routing-options static]
19. Which CLI command displays routes received from a RIP neighbor?(D)

A. show rip route "neighbor"
B. show rip receive-route "neighbor"
C. show route protocol rip "neighbor"
D. show route receive-protocol rip "neighbor"
20. Which protocol family must be configured on an interface to allow ICMP traffic to be received?(B)

A. ip
B. inet
C. icmp
D. management
21. Which statement describes the function of a routing policy?(D)

A. It controls the size of routing protocol packets.
B. It allows routing protocols to be auto configured.
C. It allows for the configuration and management of user permissions.
D. It controls routing information transferred in and out of the routing table.
22. A JUNOS router has a packet filter configured under [edit firewall family inet]. Which two statements accurately reflect the operation of this packet filter? (Choose two.)(B C)

A. It maintains protocol state.
B. It does not maintain protocol state.
C. It processes packets independently of a particular flow.
D. It processes packets within the context of a particular flow.
23. Why would you apply an export policy to a routing protocol?(B)

A. to allow a route to be accepted into your routing table
B. to allow a route to be advertised out of your routing table
C. to allow a route to have a higher metric in your routing table
D. to prevent a route from entering your routing table
24. Which CLI command displays all static routes in the routing table?(D)

A. show static all
B. show route static
C. show static route
D. show route protocol static
25. Which routing technology is often used when a customer is single-homed to a service provider?(B)

A. RIP
B. BGP
C. Static
D. OSPF