CCNA Question and Answer 2015 Blog

CCNA Question and Answer 2015 Blog

Welcome to our CCNA question and answer blog for the year 2015. In this article, we will discuss various important questions and provide detailed answers related to the Cisco Certified Network Associate (CCNA) certification exam. Whether you are preparing for the exam or simply want to enhance your networking knowledge, this blog post will prove to be a valuable resource.

Question 1: What is the purpose of a MAC address?

Answer: A Media Access Control (MAC) address is a unique identifier assigned to a network interface controller (NIC) for communication on a network. It is used to ensure that data is sent to the correct destination device on a local network. MAC addresses are essential for the proper functioning of Ethernet networks.

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

Answer: A hub is a simple networking device that broadcasts incoming data packets to all connected devices, regardless of their intended destination. A switch, on the other hand, intelligently directs data packets to their intended destination based on the MAC addresses present in the packets. This enables better performance and reduces network congestion compared to a hub.

Question 3: What are the primary benefits of using VLANs?

Answer: Virtual Local Area Networks (VLANs) provide several advantages in network management and security. The main benefits include:

  • Improved network security by isolating sensitive data and restricting access
  • Enhanced network performance through traffic segmentation and reduced collision domains
  • Flexible network management, making it easier to add, move, or change devices without disruption

Question 4: Explain the difference between TCP and UDP protocols.

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

  • TCP provides reliable, connection-oriented communication with error checking, flow control, and acknowledgment mechanisms. It guarantees that data is received in the correct order.
  • UDP, on the other hand, is connectionless and provides unreliable, datagram-oriented communication. It does not include error checking or flow control mechanisms. It is commonly used for real-time applications where occasional data loss is acceptable, such as video streaming or online gaming.

Question 5: What is the purpose of a default gateway?

Answer: A default gateway is a network device that serves as an entry and exit point for traffic going to and from devices on a local network. It is typically a router that connects the local network to other networks, such as the internet. The default gateway allows devices within the local network to communicate with devices on external networks.

This blog post provides just a glimpse of the knowledge required for the CCNA certification exam. It is important to study and understand various networking concepts and technologies to succeed in the exam and build a successful career in networking.

Thank you for reading our CCNA Question and Answer 2015 blog post. Stay tuned for more informative articles.

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