Mastering CCNA: Test Your Knowledge with These MCQs and Answers

Are you on a quest to earn your Cisco Certified Network Associate (CCNA) certification? If so, you're in for a rewarding journey that can open doors to exciting career opportunities in the world of networking. To help you prepare effectively for the CCNA exam, we've put together a collection of Multiple Choice Questions (MCQs) along with detailed answers. These questions cover various CCNA topics, ensuring you have a comprehensive understanding of the material.

1. Which layer of the OSI model is responsible for data encryption and decryption?

a) Physical Layer

b) Data Link Layer

c) Network Layer

d) Presentation Layer

Answer: d) Presentation Layer

Explanation: The Presentation Layer is responsible for data encryption and decryption, ensuring that data is presented in a readable format.

2. What is the purpose of the ARP (Address Resolution Protocol)?

a) To map IP addresses to MAC addresses

b) To route data packets across the network

c) To encrypt data transmissions

d) To establish VPN connections

Answer: a) To map IP addresses to MAC addresses

Explanation: ARP is used to map an IP address to its corresponding MAC address in a local network.

3. Which routing protocol uses the DUAL algorithm?

a) RIP

b) OSPF

c) EIGRP

d) BGP

Answer: c) EIGRP

Explanation: Enhanced Interior Gateway Routing Protocol (EIGRP) uses the DUAL (Diffusing Update Algorithm) to calculate routing tables.

4. What is the default administrative distance for OSPF (Open Shortest Path First)?

a) 90

b) 110

c) 120

d) 170

Answer: b) 110

Explanation: OSPF has a default administrative distance of 110.

5. Which subnet mask is used for a Class B IP address with subnetting?

a) 255.255.0.0

b) 255.255.255.0

c) 255.0.0.0

d) 255.255.255.255

Answer: a) 255.255.0.0

Explanation: A Class B IP address with subnetting typically uses a subnet mask of 255.255.0.0.

6. What is the purpose of the VLAN (Virtual Local Area Network)?

a) To segment a physical network into multiple logical networks

b) To connect multiple geographically distant networks

c) To provide wireless connectivity

d) To filter incoming traffic

Answer: a) To segment a physical network into multiple logical networks

Explanation: VLANs are used to create logical network segments within a physical network.

7. Which protocol operates at the Transport Layer of the OSI model?

a) HTTP

b) ICMP

c) SMTP

d) TCP

Answer: d) TCP

Explanation: Transmission Control Protocol (TCP) operates at the Transport Layer of the OSI model.

8. What is the maximum number of hosts in a /27 subnet?

a) 16

b) 32

c) 64

d) 128

Answer: b) 32

Explanation: A /27 subnet has 32 available host addresses.

9. Which type of firewall operates at the Application Layer of the OSI model?

a) Stateful firewall

b) Packet-filtering firewall

c) Proxy firewall

d) NAT firewall

Answer: c) Proxy firewall

Explanation: Proxy firewalls operate at the Application Layer and provide a high level of security by inspecting and filtering application-layer traffic.

10. What is the primary function of a router in a network?

a) To connect devices within the same network segment

b) To filter incoming traffic

c) To forward data between different network segments

d) To provide wireless access

Answer: c) To forward data between different network segments

Explanation: Routers are responsible for forwarding data between different network segments, making routing decisions based on destination IP addresses.

Conclusion:

These CCNA MCQs and answers cover a range of topics, helping you test your knowledge and prepare for the CCNA certification exam. Remember that continuous practice and hands-on experience are key to mastering networking concepts.

Good luck with your CCNA journey, and don't forget to explore further resources and study materials to enhance your understanding. You can also check out the JobsJaano website for more CCNA-related resources to boost your preparation. Happy studying!