CCNA Test Questions and Answers 2017

CCNA Test Questions and Answers 2017

In this blog post, we will cover some important CCNA test questions and provide answers from the 2017 exam. The Cisco Certified Network Associate (CCNA) certification is a widely recognized credential in the networking industry. Whether you are preparing for the CCNA exam or just looking to test your knowledge, these questions will help you assess your understanding of key networking concepts.

1. Question: What is the function of the Network Layer in the OSI model?

Answer: The Network Layer, or Layer 3, is responsible for logical addressing and routing. It establishes end-to-end connections and determines the best path for data to travel across different networks.

2. Question: What is the purpose of subnetting?

Answer: Subnetting allows for the division of a single network into multiple smaller subnetworks. It helps in optimizing network performance, managing IP address allocation, and enhancing network security.

3. Question: What is the difference between TCP and UDP?

Answer: TCP (Transmission Control Protocol) is a connection-oriented protocol that guarantees reliable and ordered delivery of data. It utilizes acknowledgments and retransmissions to ensure data integrity. UDP (User Datagram Protocol), on the other hand, is connectionless and does not guarantee delivery or order of data. It is commonly used for real-time applications where immediate transmission is more important than reliability.

4. Question: What is the purpose of VLANs (Virtual Local Area Networks)?

Answer: VLANs allow for logical segmentation of a physical network into multiple virtual networks. They provide improved security, better network performance, and easier management by separating broadcast domains and controlling traffic flow.

5. Question: What is the difference between a router and a switch?

Answer: A router is a networking device that operates at Layer 3 and is responsible for forwarding data packets between networks. It makes decisions based on IP addresses. A switch, on the other hand, operates at Layer 2 and is used to connect devices within a network. It uses MAC addresses to forward traffic within the same network.

6. Question: How does OSPF (Open Shortest Path First) routing protocol work?

Answer: OSPF is a dynamic routing protocol that uses the Shortest Path First algorithm to determine the best path for routing IP packets. It calculates the cost of each link based on bandwidth and selects the shortest path to a destination. OSPF also provides loop-free routing and supports load balancing.

7. Question: What are the benefits of using NAT (Network Address Translation)?

Answer: NAT allows private IP addresses to be translated into public IP addresses when communicating over the internet. It conserves IP address space, provides a level of security by hiding internal network details, and enables multiple devices to share a single public IP address.

8. Question: What is the purpose of ACLs (Access Control Lists)?

Answer: ACLs are used to control traffic flow in a network by permitting or denying packets based on specified criteria. They provide security by filtering network traffic, allowing or blocking access to network resources based on rules configured on routers or switches.

9. Question: What is the difference between static and dynamic routing?

Answer: Static routing involves manually configuring the routing table on a network device. It is suitable for small networks with a limited number of routes. Dynamic routing, on the other hand, uses routing protocols to automatically update routing tables based on network changes. It is more scalable and suitable for larger networks.

10. Question: What is the purpose of DHCP (Dynamic Host Configuration Protocol)?

Answer: DHCP is used to automatically assign IP addresses, subnet masks, and other network configuration parameters to devices on a network. It simplifies network administration by eliminating the need for manual IP address configuration on each device.

This concludes our CCNA test questions and answers blog post for 2017. We hope these questions have helped you test your knowledge and prepare for the CCNA exam. Remember to stay updated with the latest networking technologies and continue learning to thrive in the ever-evolving IT industry.

Leave a Comment