Category: CCNA

Cisco Certified Network Associate certification resources

DataLink and Network Layer Addresses
CCNA May 27, 2019

Master Data Link and Network Layer Addresses in 2025: A Complete Guide

Data Delivery from the source device to a destination device is the primary responsibility of the network layer and data link layer. Protocols at both layers contain a source and destination address, but their addresses have different purposes. Understanding data link and network layer addresses is crucial for mastering communication between devices. These addresses—MAC at...
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CCNA May 27, 2019

Transmission Control Protocol (TCP)

The Transmission Control Protocol (TCP) is a network communication protocol designed to send data packets over the Internet. It is a transport layer protocol in the OSI model. It creates a connection between remote computers by transporting and ensuring the delivery of messages over supporting networks and the Internet. When the application layer requires sending...
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Diagram of network devices including hub, gateway, router, repeater, bridge, and switch with labeled illustrations
CCNA May 27, 2019

Network Devices: A Complete Guide to Understanding and Choosing the Right Hardware for Your Network

In 2025, network devices will remain the unsung heroes of our hyper-connected world. From streaming your favorite shows to powering global enterprises, these devices ensure seamless data flow, robust security, and reliable connectivity. Whether you’re a tech enthusiast, an IT professional, or a business owner optimizing your infrastructure, understanding network devices is key to unlocking...
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CCNA May 24, 2019

Understanding Network Protocols in 2025: A Comprehensive Guide

When two humans talk to each other, they may have to use the same language, but they generally understand each other without having to adhere to rigid rules of grammar or formal language frameworks. Computers, on the other hand, have everything openly defined and structured. If computers wish to communicate with one another, they have...
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Hazards
CCNA May 17, 2019

What are the Hazards of Copper Media

All types of copper cables are vulnerable to fire and electrical hazards. Fire hazards exist since cable insulation and sheaths may be flammable or produce toxic fumes when heated or burned. Building authorities or organizations may specify related safety standards for cabling and hardware installations. Electrical hazards are a potential problem because copper wires can...
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