JNCIA Practice Test Video Answers

1. A

Separating the Routing Engine and Packet Forwarding Engine ensures stability and modularity.

2. B

The ‘show route’ command displays the routing table entries.

3. B

‘Commit’ saves and applies candidate configurations.

4. B

Interface settings are defined under .

5. C

Junos uses NTP for time synchronization.

6. C

OSPF divides networks into areas to optimize routing.

7. A

‘show interfaces extensive’ displays detailed statistics.

8. B

Routing policies modify or control routing information.

9. B

BGP is used to exchange routes between autonomous systems.

10. A

Rescue configuration provides a known good recovery point.

11. A

‘save’ writes configuration to a file.

12. B

Logical interfaces are represented by names with a unit number suffix.

13. C

‘configure’ switches from operational to configuration mode.

14. B

‘rollback’ reverts configurations to a saved version.

15. A

SNMP manages and monitors network devices.

16. C

‘root’ is the default administrative account.

17. A

Authentication settings are located in .

18. B

‘show interfaces terse’ summarizes interface status and IPs.

19. A

Virtual Chassis synchronizes configurations across devices.

20. B

‘show chassis hardware’ lists system components.

21. C

The default routing instance is ‘default’.

22. C

Configuration mode allows candidate configurations.

23. B

‘system login’ defines user access and authentication methods.

24. B

RIP is a distance-vector protocol.

25. A

GRES provides redundancy for Routing Engines.

26. A

‘commit confirmed’ rolls back if not confirmed in time.

27. B

Committed configurations are stored in /config/juniper.conf.gz.

28. B

SSH uses port 22 by default.

29. C

‘accept’ permits routes in routing policy terms.

30. C

DHCP assigns IP addresses automatically.

31. B

‘show version’ displays the installed Junos software version.

32. C

Loopback interfaces are used for routing protocol testing.

33. B

Displays time since the system was last rebooted.

34. B

OSPF uses cost and bandwidth as metrics.

35. B

System logs are stored in /var/log/messages.

36. B

OSPF operates at Layer 3 of the OSI model.

37. C

BGP uses TCP port 179.

38. B

‘show system processes extensive’ provides CPU and memory details.

39. A

Apply-groups enable reusing configuration sets.

40. B

The Packet Forwarding Engine handles packet processing.

41. B

‘super-user’ class has full access rights.

42. A

VRRP provides Layer 3 redundancy for gateways.

43. B

‘show ospf neighbor’ lists OSPF adjacency information.

44. A

Displays routing policy configurations.

45. A

Routing Instances separate logical routers within a device.

46. A

LLDP discovers connected devices on Layer 2.

47. C

BGP uses path attributes instead of metrics.

48. A

The rescue configuration restores the system to a stable state.

49. A

RSTP prevents loops at Layer 2.