JUNIPER NETWORKS CERTIFIED ASSOCIATE (JNCIA-
JUNOS) EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWER) Q&A
2027|INSSTANT DOWNLOAD PDF
1. What is the primary purpose of Junos OS?
A. To provide an operating system for networking devices
B. To provide desktop applications
C. To manage databases
D. To compile programming languages
Answer: A. To provide an operating system for networking
devices
Rationale: Junos OS provides the software environment used to
operate and manage Juniper networking devices.
2. Which Junos component is responsible for routing protocols
and maintaining routing information?
A. Forwarding plane
B. Routing Engine
C. Packet Forwarding Engine
D. Interface driver
Answer: B. Routing Engine
Rationale: The Routing Engine runs routing protocols,
maintains routing tables, and handles control-plane functions.
,3. Which component is primarily responsible for forwarding
packets?
A. Routing Engine
B. CLI
C. Packet Forwarding Engine
D. Configuration database
Answer: C. Packet Forwarding Engine
Rationale: The Packet Forwarding Engine performs high-speed
packet forwarding based on forwarding information.
4. Which command displays operational information about
the device?
A. configure
B. show
C. set
D. commit
Answer: B. show
Rationale: The show command is extensively used in
operational mode to inspect system and network status.
5. Which Junos CLI mode is used to make configuration
changes?
,A. Operational mode
B. Configuration mode
C. Shell mode
D. Monitor mode
Answer: B. Configuration mode
Rationale: Configuration changes are made after entering
configuration mode with the configure command.
6. Which command enters configuration mode?
A. edit
B. configure
C. set-config
D. config-start
Answer: B. configure
Rationale: The configure command moves the user from
operational mode into configuration mode.
7. What command saves candidate configuration changes and
activates them?
A. save
B. apply
C. commit
D. activate
, Answer: C. commit
Rationale: Junos uses a candidate configuration model.
Changes become active when successfully committed.
8. What is the purpose of the candidate configuration?
A. It stores temporary configuration changes before activation
B. It stores routing packets
C. It stores interface statistics
D. It replaces the forwarding table
Answer: A. It stores temporary configuration changes before
activation
Rationale: Administrators can modify the candidate
configuration and review it before committing.
9. Which command displays differences between the
candidate and active configurations?
A. show compare
B. show difference
C. compare configuration
D. diff-config
Answer: A. show compare
Rationale: show compare displays changes made to the
candidate configuration relative to the active configuration.
JUNOS) EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWER) Q&A
2027|INSSTANT DOWNLOAD PDF
1. What is the primary purpose of Junos OS?
A. To provide an operating system for networking devices
B. To provide desktop applications
C. To manage databases
D. To compile programming languages
Answer: A. To provide an operating system for networking
devices
Rationale: Junos OS provides the software environment used to
operate and manage Juniper networking devices.
2. Which Junos component is responsible for routing protocols
and maintaining routing information?
A. Forwarding plane
B. Routing Engine
C. Packet Forwarding Engine
D. Interface driver
Answer: B. Routing Engine
Rationale: The Routing Engine runs routing protocols,
maintains routing tables, and handles control-plane functions.
,3. Which component is primarily responsible for forwarding
packets?
A. Routing Engine
B. CLI
C. Packet Forwarding Engine
D. Configuration database
Answer: C. Packet Forwarding Engine
Rationale: The Packet Forwarding Engine performs high-speed
packet forwarding based on forwarding information.
4. Which command displays operational information about
the device?
A. configure
B. show
C. set
D. commit
Answer: B. show
Rationale: The show command is extensively used in
operational mode to inspect system and network status.
5. Which Junos CLI mode is used to make configuration
changes?
,A. Operational mode
B. Configuration mode
C. Shell mode
D. Monitor mode
Answer: B. Configuration mode
Rationale: Configuration changes are made after entering
configuration mode with the configure command.
6. Which command enters configuration mode?
A. edit
B. configure
C. set-config
D. config-start
Answer: B. configure
Rationale: The configure command moves the user from
operational mode into configuration mode.
7. What command saves candidate configuration changes and
activates them?
A. save
B. apply
C. commit
D. activate
, Answer: C. commit
Rationale: Junos uses a candidate configuration model.
Changes become active when successfully committed.
8. What is the purpose of the candidate configuration?
A. It stores temporary configuration changes before activation
B. It stores routing packets
C. It stores interface statistics
D. It replaces the forwarding table
Answer: A. It stores temporary configuration changes before
activation
Rationale: Administrators can modify the candidate
configuration and review it before committing.
9. Which command displays differences between the
candidate and active configurations?
A. show compare
B. show difference
C. compare configuration
D. diff-config
Answer: A. show compare
Rationale: show compare displays changes made to the
candidate configuration relative to the active configuration.
