CCNA Exams Questions and Answers – 2015

CCNA Exams Questions and Answers – 2015

Are you preparing for the CCNA certification exam? In this blog post, we will provide you with a comprehensive set of CCNA exam questions and answers from the year 2015. These questions will test your knowledge and help you assess your readiness for the exam. Let’s dive in!

Question 1

What are the primary functions of a router in a network?

Answer: Routers perform the following key functions in a network:

  • Packet forwarding: Routers forward packets from one network to another based on the destination IP address.
  • Path selection: Routers determine the best path for data packets to reach their destination using routing protocols.
  • Network addressing: Routers assign network addresses to devices and enable communication between different networks.

Question 2

What is the purpose of subnetting?

Answer: Subnetting is the process of dividing a network into smaller subnetworks, known as subnets. The main purpose of subnetting is:

  • Efficient utilization of IP addresses: Subnetting allows for the conservation of IP addresses by creating smaller subnets.
  • Enhanced network performance: By dividing a network into subnets, network traffic can be localized, reducing congestion and improving overall performance.
  • Improved network security: Subnetting helps in isolating different parts of a network, allowing for better control and security of data.

Question 3

What is the difference between TCP and UDP?

Answer: TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are both transport layer protocols, but they have some fundamental differences:

  • Reliability: TCP provides reliable data delivery by using error detection, retransmission of lost packets, and flow control. UDP, on the other hand, does not guarantee reliable delivery.
  • Connection-oriented vs. connectionless: TCP is connection-oriented, meaning a connection is established before data transfer. UDP is connectionless, allowing for simpler and faster data transmission.
  • Order of delivery: TCP ensures that data packets are delivered in the correct order, while UDP does not guarantee the order of delivery.

Question 4

What are the advantages of using VLANs (Virtual Local Area Networks)?

Answer: VLANs offer several advantages in network management:

  • Improved network performance: By dividing a large Layer 2 network into smaller VLANs, network traffic can be controlled and isolated, leading to enhanced performance.
  • Enhanced security: VLANs provide segmentation, allowing for better control over network access and improved security by isolating sensitive data.
  • Flexibility and scalability: VLANs allow for logical grouping of devices based on functions or departments, making it easier to manage and scale the network as per the organization’s needs.

This is just a small sample of the CCNA exam questions from 2015. By practicing with more questions and understanding the concepts behind them, you can greatly increase your chances of success in the CCNA certification exam. Best of luck with your preparations!

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