CCNA Exam Questions and Answers 2019 – Blog

CCNA Exam Questions and Answers 2019

Are you preparing for the CCNA exam in 2019? Get ready for success! In this blog post, we have compiled a comprehensive set of CCNA exam questions and provided detailed answers to help you ace your test. Whether you are a novice or have some networking experience, these questions will test your knowledge and provide you with valuable insights into the topics covered in the exam.

1. What is the purpose of a subnet mask in networking?

A subnet mask is used to divide an IP network into subnetworks, known as subnets. It helps determine the network and host portions of an IP address. By applying a subnet mask to an IP address, you can identify which part of the address represents the network and which part represents the host.

2. Explain the difference between a hub and a switch.

A hub is a simple networking device that broadcasts incoming data packets to all connected devices, regardless of their destination. In contrast, a switch is an intelligent device that examines the destination MAC address of each packet and forwards it only to the specific device to which it is addressed. This makes switches more efficient and secure compared to hubs.

3. What are the main benefits of using VLANs (Virtual Local Area Networks)?

VLANs offer several advantages in network administration, including:

  • Enhanced security: VLANs can isolate traffic between different departments or user groups, reducing the risk of unauthorized access.
  • Better performance: By dividing a network into smaller broadcast domains, VLANs reduce network congestion and improve overall performance.
  • Simplified management: VLANs make it easier to manage and configure logical groups of devices, even if they are physically dispersed.

4. What is the purpose of the Spanning Tree Protocol (STP) in a network?

The Spanning Tree Protocol is used to prevent loops in a network topology. It identifies redundant paths and blocks them, ensuring there is only one active path between any two network devices. By eliminating loops, STP enhances network stability and prevents broadcast storms.

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