CCNA Interview Questions and Answers 2018

CCNA Interview Questions and Answers 2018

Are you preparing for a CCNA interview in 2018? Do you want to ensure that you have all the necessary knowledge and skills to ace your interview? In this blog post, we will provide you with a comprehensive list of CCNA interview questions and answers that were commonly asked in 2018. By going through these questions and understanding the provided answers, you will be well-prepared for any CCNA interview you may face.

1. What is the difference between a router and a switch?

A router and a switch are both networking devices, but they serve different purposes. A router connects multiple networks and routes packets between them, while a switch connects devices within a network and forwards packets between them.

2. What are the different types of routing protocols?

There are several types of routing protocols, including:

  • Static Routing – Manual configuration of routes
  • Dynamic Routing – Routes are learned and updated automatically
  • Distance Vector Routing – Routes are based on distance and direction
  • Link-State Routing – Routes are based on the knowledge of the complete network topology
  • Hybrid Routing – Combines aspects of both distance vector and link-state routing

3. Explain the process of subnetting.

Subnetting is the division of a network into smaller subnetworks or subnets. It involves borrowing bits from the host portion of an IP address to create subnetwork addresses. The subnet mask is used to determine the network and host portions of an IP address. Subnetting allows for efficient utilization of IP addresses and better network management.

There are two methods of subnetting:

  • Variable-Length Subnet Masking (VLSM) – Allows for subnetting a network with different-sized subnets
  • Classless Inter-Domain Routing (CIDR) – Allows for hierarchical addressing and variable-length subnets

4. What is VLAN and how does it work?

A VLAN (Virtual Local Area Network) is a logical grouping of devices in a network, regardless of their physical locations. It allows for the segmentation of a network into multiple broadcast domains, improving security and performance.

VLANs work by adding an additional tag to Ethernet frames, indicating the VLAN membership of the frame. Switches use this tag to forward frames only to the devices in the same VLAN, preventing unnecessary broadcast traffic.

5. Describe the OSI model and its layers.

The OSI (Open Systems Interconnection) model is a conceptual framework used to understand and describe how different networking protocols interact. It consists of seven layers, each with its own specific functions:

  1. Physical Layer – Deals with the transmission of unstructured raw data over physical media
  2. Data Link Layer – Provides error-free transfer of data frames between nodes on the same network
  3. Network Layer – Handles addressing, routing, and packet forwarding
  4. Transport Layer – Ensures reliable and error-free end-to-end data transfer
  5. Session Layer – Establishes, manages, and terminates communication sessions
  6. Presentation Layer – Formats and translates data for presentation to the application layer
  7. Application Layer – Supports communication services for network applications

These are just a few examples of the CCNA interview questions and answers for 2018. To get the full list along with detailed explanations, don’t forget to check out our complete CCNA Interview Questions and Answers Guide.

Remember, preparation is the key to success in any interview. Good luck with your CCNA interview!

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