Cisco Certified Network Associate
(CCNA) Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. A network engineer is designing a small enterprise LAN where multiple
departments must be logically separated while still using the same
physical switch infrastructure. The engineer configures VLANs on a
Layer 2 switch and assigns switch ports to different VLAN IDs. What is
the primary purpose of implementing VLANs in this scenario?
A. To increase the physical number of switches in the network
B. To reduce collision domains by converting switches into hubs
C. To logically segment a network and reduce broadcast domains within
the same physical infrastructure
D. To eliminate the need for IP addressing within local networks
VLANs allow network administrators to divide a single physical switched
network into multiple logical networks, improving security, reducing
broadcast traffic, and enhancing manageability without requiring
additional physical hardware.
2. A technician is troubleshooting connectivity issues between two
routers running OSPF. The routers are in the same area, but they are
not forming an adjacency. Which OSPF requirement must be met for
adjacency to establish?
,A. Routers must use different process IDs
B. Routers must have matching OSPF area IDs and compatible network
parameters such as hello/dead timers
C. Routers must be in different autonomous systems
D. Routers must disable all authentication mechanisms
OSPF adjacency requires matching area IDs, compatible timers, and
consistent configuration parameters; mismatches prevent neighbor
relationships from forming.
3. A company wants to assign IP addresses dynamically to hosts using a
centralized service. Which protocol should be implemented?
A. DNS
B. ARP
C. DHCP
D. SNMP
DHCP automatically assigns IP configuration parameters such as IP
address, subnet mask, and gateway, reducing manual configuration errors
and administrative workload.
4. A switch receives a frame with an unknown destination MAC address.
What action does the switch take?
A. Drops the frame immediately
B. Sends the frame only to the default gateway
C. Floods the frame out of all ports except the receiving port within the
same VLAN
D. Converts the frame into a broadcast packet
When the destination MAC is unknown, a switch floods the frame to all
ports in the VLAN to discover the destination device.
5. Which IPv6 address type is used for one-to-many communication?
A. Unicast
B. Anycast
C. Multicast
, D. Broadcast
IPv6 uses multicast instead of broadcast to efficiently send packets to
multiple devices simultaneously.
6. A network administrator configures a static route on a router. What is
the main advantage of static routing?
A. Automatic path selection based on network load
B. Dynamic adaptation to network topology changes
C. Low overhead and predictable routing behavior
D. Requires no configuration of next-hop addresses
Static routing provides predictable and low-overhead routing but lacks
automatic adaptability to topology changes.
7. Which layer of the OSI model is responsible for logical addressing and
routing?
A. Data Link
B. Transport
C. Network
D. Physical
The Network layer handles IP addressing and routing between different
networks.
8. A switch is experiencing loops in the network causing broadcast
storms. Which protocol prevents this issue?
A. RIP
B. STP
C. DHCP
D. NAT
Spanning Tree Protocol prevents switching loops by blocking redundant
paths.
9. What is the function of NAT in a network?
(CCNA) Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. A network engineer is designing a small enterprise LAN where multiple
departments must be logically separated while still using the same
physical switch infrastructure. The engineer configures VLANs on a
Layer 2 switch and assigns switch ports to different VLAN IDs. What is
the primary purpose of implementing VLANs in this scenario?
A. To increase the physical number of switches in the network
B. To reduce collision domains by converting switches into hubs
C. To logically segment a network and reduce broadcast domains within
the same physical infrastructure
D. To eliminate the need for IP addressing within local networks
VLANs allow network administrators to divide a single physical switched
network into multiple logical networks, improving security, reducing
broadcast traffic, and enhancing manageability without requiring
additional physical hardware.
2. A technician is troubleshooting connectivity issues between two
routers running OSPF. The routers are in the same area, but they are
not forming an adjacency. Which OSPF requirement must be met for
adjacency to establish?
,A. Routers must use different process IDs
B. Routers must have matching OSPF area IDs and compatible network
parameters such as hello/dead timers
C. Routers must be in different autonomous systems
D. Routers must disable all authentication mechanisms
OSPF adjacency requires matching area IDs, compatible timers, and
consistent configuration parameters; mismatches prevent neighbor
relationships from forming.
3. A company wants to assign IP addresses dynamically to hosts using a
centralized service. Which protocol should be implemented?
A. DNS
B. ARP
C. DHCP
D. SNMP
DHCP automatically assigns IP configuration parameters such as IP
address, subnet mask, and gateway, reducing manual configuration errors
and administrative workload.
4. A switch receives a frame with an unknown destination MAC address.
What action does the switch take?
A. Drops the frame immediately
B. Sends the frame only to the default gateway
C. Floods the frame out of all ports except the receiving port within the
same VLAN
D. Converts the frame into a broadcast packet
When the destination MAC is unknown, a switch floods the frame to all
ports in the VLAN to discover the destination device.
5. Which IPv6 address type is used for one-to-many communication?
A. Unicast
B. Anycast
C. Multicast
, D. Broadcast
IPv6 uses multicast instead of broadcast to efficiently send packets to
multiple devices simultaneously.
6. A network administrator configures a static route on a router. What is
the main advantage of static routing?
A. Automatic path selection based on network load
B. Dynamic adaptation to network topology changes
C. Low overhead and predictable routing behavior
D. Requires no configuration of next-hop addresses
Static routing provides predictable and low-overhead routing but lacks
automatic adaptability to topology changes.
7. Which layer of the OSI model is responsible for logical addressing and
routing?
A. Data Link
B. Transport
C. Network
D. Physical
The Network layer handles IP addressing and routing between different
networks.
8. A switch is experiencing loops in the network causing broadcast
storms. Which protocol prevents this issue?
A. RIP
B. STP
C. DHCP
D. NAT
Spanning Tree Protocol prevents switching loops by blocking redundant
paths.
9. What is the function of NAT in a network?
