2025/2026 CCNA {Cisco Certified Network Associate} EXAM 100+ QUESTIONS AND CORRECT ANSWERS WELL EXPLAINED

2025/2026 CCNA {Cisco Certified Network
Associate} EXAM 100+ QUESTIONS AND CORRECT
ANSWERS WELL EXPLAINED
The Core Topics covered

i. Networking Fundamentals.
ii. IPv4/IPv6.
iii. Routing.
iv. Switching.
v. NAT.
vi. VLANS.
vii. ACLs.
viii. Network Security.

100+ QUESTIONS AND ANSWERS

1. Which of the following devices operates at Layer 2 of the OSI model?

A. Router
B. Switch
C. Hub
D. Firewall
Answer: B. Switch
Explanation: Switches operate at Layer 2 (Data Link Layer), forwarding frames based on MAC
addresses.




2. Which command displays the IP address assigned to an interface on a Cisco router?

A. show ip route
B. show ip interface brief
C. show interfaces status
D. show running-config


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,2025/2026 CCNA {Cisco Certified Network
Associate} EXAM 100+ QUESTIONS AND CORRECT
ANSWERS WELL EXPLAINED
Answer: B. show ip interface brief
Explanation: This command provides a concise summary of interfaces and their assigned IP
addresses.




3. Which protocol is used to automatically assign IP addresses to devices in a
network?

A. DNS
B. DHCP
C. ARP
D. ICMP
Answer: B. DHCP
Explanation: DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses
to hosts.




4. What is the default administrative distance of a static route in Cisco routers?

A. 0
B. 1
C. 90
D. 110
Answer: B. 1
Explanation: Static routes have an administrative distance of 1, making them highly preferred.




5. Which of the following is a valid IPv6 address?

A. 192.168.1.1
B. FE80::1
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,2025/2026 CCNA {Cisco Certified Network
Associate} EXAM 100+ QUESTIONS AND CORRECT
ANSWERS WELL EXPLAINED
C. 255.255.255.255
D. 172.16.0.1
Answer: B. FE80::1
Explanation: IPv6 addresses use hexadecimal notation with colons; FE80::1 is a link-local IPv6
address.




6. The purpose of the ARP protocol is to:

A. Map MAC addresses to IP addresses
B. Map IP addresses to MAC addresses
C. Assign dynamic IP addresses
D. Forward packets to routers
Answer: B. Map IP addresses to MAC addresses
Explanation: ARP (Address Resolution Protocol) resolves IP addresses to their corresponding
MAC addresses.




7. Which layer of the OSI model is responsible for routing?

A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
Answer: C. Layer 3
Explanation: Routing is a function of the Network Layer (Layer 3) using logical IP addresses.




8. Which cable type is used to connect two switches directly?



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, 2025/2026 CCNA {Cisco Certified Network
Associate} EXAM 100+ QUESTIONS AND CORRECT
ANSWERS WELL EXPLAINED
A. Straight-through
B. Cross-over
C. Roll-over
D. Coaxial
Answer: B. Cross-over
Explanation: Cross-over cables connect similar devices like switch-to-switch or router-to-router.




9. The command enable secret is used to:

A. Set a console password
B. Set a privileged EXEC mode password (encrypted)
C. Set a user EXEC password
D. Enable SSH
Answer: B. Set a privileged EXEC mode password (encrypted)
Explanation: enable secret encrypts the privileged mode password, offering more security.




10. Which of the following is a class B IP address?

A. 10.0.0.1
B. 172.16.0.1
C. 192.168.0.1
D. 224.0.0.5
Answer: B. 172.16.0.1
Explanation: Class B IP addresses range from 128.0.0.0 to 191.255.255.255.




11. What is the subnet mask of a /26 network?



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