Relevant Questions for CCNA Exam with Answers

Relevant Questions for CCNA Exam with Answers

Preparing for the CCNA exam can be a challenging task, as it covers a wide range of networking topics. To help you
with your preparation, we have compiled a list of relevant questions along with their answers. Read on to enhance
your CCNA knowledge and boost your chances of success in the exam.

1. What is the purpose of subnetting in networking?

Answer: Subnetting is the process of dividing a network into smaller subnetworks called subnets. It helps in
improving network efficiency, reducing network congestion, and enhancing security by isolating different network

2. Explain the OSI model and its layers.

Answer: The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of
a communication system. It consists of seven layers:

  1. Physical layer
  2. Data link layer
  3. Network layer
  4. Transport layer
  5. Session layer
  6. Presentation layer
  7. Application layer

Each layer performs specific tasks to ensure efficient communication between network devices.

3. What is the purpose of the ARP protocol?

Answer: The Address Resolution Protocol (ARP) is used to map an IP address to a physical (MAC) address on a local
network. It enables devices to communicate with each other over Ethernet by associating IP addresses with
corresponding MAC addresses.

4. How does VLAN improve network performance?

Answer: Virtual Local Area Networks (VLANs) are used to segment a network into multiple logical networks,
enhancing scalability, reducing broadcast traffic, and improving security. By isolating traffic between VLANs,
network performance can be optimized, and bandwidth can be efficiently allocated.

5. What is the purpose of NAT in networking?

Answer: Network Address Translation (NAT) allows multiple devices in a private network to share a single public
IP address when accessing the internet. It acts as a mediator by translating private IP addresses into public IP
addresses and vice versa.

6. Explain the difference between TCP and UDP.

Answer: Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) are the two main transport layer
protocols. TCP provides reliable, connection-oriented communication, ensuring data delivery and error
correction. UDP, on the other hand, is connectionless and provides faster, but less reliable, communication for
applications such as video streaming and online gaming.

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