9tut CCNA 200-125 Questions and Answers

9tut CCNA 200-301-dumps/”>9tut CCNA 200-125 Questions and Answers! Whether you are preparing for your CCNA certification or looking to enhance your networking knowledge, this comprehensive guide will provide you with the necessary insights to succeed.

Question 1: What is a MAC address?

A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communication at the data link layer of a network segment.


MAC addresses are assigned to NICs (Network Interface Cards) and are used for device identification at the link layer of the OSI model. They consist of six groups of two hexadecimal digits (0-9, A-F), separated by colons or hyphens. For example, 00:1A:2B:3C:4D:5E. MAC addresses allow communication between devices on the same network segment.

Question 2: What is the difference between a hub and a switch?

A hub and a switch are both network devices used to connect devices within a network, but they operate in different ways.


A hub is a basic device that receives data packets from one port and broadcasts them to all other ports, regardless of the destination. This leads to collisions and limits network performance. On the other hand, a switch intelligently forwards data packets to the specific port where the destination device is connected, enhancing network performance and reducing collisions.

Question 3: What is the purpose of VLANs?

Virtual Local Area Networks (VLANs) play a crucial role in network segmentation and improving network efficiency.


VLANs allow network administrators to logically group devices together on the same physical network infrastructure, even if they are physically connected to different switches. This segmentation helps in improving network performance, reducing broadcast traffic, enhancing network security, and simplifying network management.

Question 4: What is the default gateway?

The default gateway acts as the intermediary device used by hosts to send packets to destinations outside of their own subnet.


The default gateway is typically the IP address of the router interface that connects the local network to other networks or the internet. When a host wants to reach a destination outside of its own subnet, it sends the packet to the default gateway, which then takes care of forwarding it to the appropriate destination.

Question 5: Explain the difference between TCP and UDP.

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are two main transport layer protocols used in computer networks.


TCP provides reliable, connection-oriented communication with error-checking mechanisms, guaranteed delivery, and ordered packet transfer. It is best suited for applications that require data integrity, such as web browsing and file transfer. UDP, on the other hand, is connectionless and provides fast, low-overhead communication without error-checking or guaranteed delivery, making it ideal for real-time applications like video streaming and online gaming.

These were just a few questions and answers related to the CCNA 200-125 exam and networking concepts. Remember to study thoroughly and practice regularly to successfully pass your exam and excel in your networking career.

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