JUNIPER NETWORKS CERTIFIED ASSOCIATE (JNCIA-
JUNOS) EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2027
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1. What operating system is used by Juniper Networks routers
and switches?
A. IOS
B. JUNOS
C. NX-OS
D. EOS
Correct Answer: B. JUNOS
Rationale: JUNOS is the network operating system used across
Juniper Networks routing and switching platforms.
2. Which component of JUNOS is responsible for maintaining
routing information?
A. Forwarding plane
B. Control plane
C. Management plane
D. Data plane
Correct Answer: B. Control plane
Rationale: The control plane runs routing protocols and
maintains routing information used to build forwarding tables.
,3. Which JUNOS component forwards packets toward their
destinations?
A. Routing Engine
B. Control plane
C. Forwarding plane
D. Configuration database
Correct Answer: C. Forwarding plane
Rationale: The forwarding plane performs packet forwarding
based on forwarding-table information.
4. What is the primary function of the Routing Engine (RE)?
A. Forward user packets
B. Run routing protocols and manage the system
C. Provide physical Ethernet connectivity
D. Encrypt all packets
Correct Answer: B. Run routing protocols and manage the
system
Rationale: The Routing Engine provides control-plane functions,
including routing protocols and system management.
5. Which component typically performs high-speed packet
forwarding on a Juniper device?
A. Routing Engine
B. Packet Forwarding Engine
C. Console server
D. Configuration database
,Correct Answer: B. Packet Forwarding Engine
Rationale: The Packet Forwarding Engine handles packet
forwarding using information supplied by the control plane.
6. Which command displays the current active configuration in
JUNOS?
A. show route
B. show interfaces
C. show configuration
D. show system
Correct Answer: C. show configuration
Rationale: show configuration displays the active configuration
hierarchy.
7. Which command enters configuration mode from
operational mode?
A. configure
B. edit
C. set
D. commit
Correct Answer: A. configure
Rationale: The configure command moves the user from
operational mode into configuration mode.
8. What command activates a candidate configuration?
A. activate
B. commit
, C. apply
D. enable
Correct Answer: B. commit
Rationale: commit validates and activates the candidate
configuration.
9. Which JUNOS mode is indicated by a prompt ending in >?
A. Configuration mode
B. Shell mode
C. Operational mode
D. Root mode
Correct Answer: C. Operational mode
Rationale: JUNOS operational mode normally uses a > prompt.
10. Which prompt normally indicates configuration mode?
A. user@host>
B. user@host#
C. user@host$
D. user@host%
Correct Answer: B. user@host#
Rationale: A # prompt indicates configuration mode in JUNOS.
11. Which command displays the routing table?
A. show route
B. show interfaces
C. show arp
D. show chassis
JUNOS) EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2027
|INSTANT DOWNLOAD PDF
1. What operating system is used by Juniper Networks routers
and switches?
A. IOS
B. JUNOS
C. NX-OS
D. EOS
Correct Answer: B. JUNOS
Rationale: JUNOS is the network operating system used across
Juniper Networks routing and switching platforms.
2. Which component of JUNOS is responsible for maintaining
routing information?
A. Forwarding plane
B. Control plane
C. Management plane
D. Data plane
Correct Answer: B. Control plane
Rationale: The control plane runs routing protocols and
maintains routing information used to build forwarding tables.
,3. Which JUNOS component forwards packets toward their
destinations?
A. Routing Engine
B. Control plane
C. Forwarding plane
D. Configuration database
Correct Answer: C. Forwarding plane
Rationale: The forwarding plane performs packet forwarding
based on forwarding-table information.
4. What is the primary function of the Routing Engine (RE)?
A. Forward user packets
B. Run routing protocols and manage the system
C. Provide physical Ethernet connectivity
D. Encrypt all packets
Correct Answer: B. Run routing protocols and manage the
system
Rationale: The Routing Engine provides control-plane functions,
including routing protocols and system management.
5. Which component typically performs high-speed packet
forwarding on a Juniper device?
A. Routing Engine
B. Packet Forwarding Engine
C. Console server
D. Configuration database
,Correct Answer: B. Packet Forwarding Engine
Rationale: The Packet Forwarding Engine handles packet
forwarding using information supplied by the control plane.
6. Which command displays the current active configuration in
JUNOS?
A. show route
B. show interfaces
C. show configuration
D. show system
Correct Answer: C. show configuration
Rationale: show configuration displays the active configuration
hierarchy.
7. Which command enters configuration mode from
operational mode?
A. configure
B. edit
C. set
D. commit
Correct Answer: A. configure
Rationale: The configure command moves the user from
operational mode into configuration mode.
8. What command activates a candidate configuration?
A. activate
B. commit
, C. apply
D. enable
Correct Answer: B. commit
Rationale: commit validates and activates the candidate
configuration.
9. Which JUNOS mode is indicated by a prompt ending in >?
A. Configuration mode
B. Shell mode
C. Operational mode
D. Root mode
Correct Answer: C. Operational mode
Rationale: JUNOS operational mode normally uses a > prompt.
10. Which prompt normally indicates configuration mode?
A. user@host>
B. user@host#
C. user@host$
D. user@host%
Correct Answer: B. user@host#
Rationale: A # prompt indicates configuration mode in JUNOS.
11. Which command displays the routing table?
A. show route
B. show interfaces
C. show arp
D. show chassis
