What is a Proxy Server?
A Proxy Server is a piece of software that works at the Application layer of the OSI model to increase the security of a network. A proxy server acts as an intermediary between the internal network and external networks. More ...
Packet Switching Store-and-Forward Transmission
To send a message from a source end system to a destination end system, the source breaks long messages into smaller chunks of data known as packets. Most packet switches use store-and-forward transmission at the inputs to the links. Store-and-forward transmission means that the packet switch must receive the entire packet before it can begin to transmit the first bit of the packet onto the outbound link. More ...
Web Server
A Web server is a server that it can be accessed over the Internet and runs specific services related to the Internet. The most common service running on a Web server is Web site hosting service. More ...
What is Microsoft Azure?
Microsoft Azure is a set of cloud services to help organizations meet business challenges. The services include tools for managing and deploying applications. Microsoft offers PaaS, IaaS, and SaaS to help businesses manage their technology demands. More ...
Media Access Control (MAC) Sublayer of the OSI Data Link Layer
Layer 7 of the OSI model, the Data Link layer, is concerned with the packaging of data into frames and placing those frames on the network. The Data Link layer actually consists of two sublayers, the Media Access Control layer, described here, and the Logical Link layer. More ...
What is DSL and how can it benefit my home or small business?
DSL or xDSL is a group of technologies that provide digital data transfer over the telephone network. DSL technology was originally begun as a part of the Integrated Services Digital Network (ISDN). The typical transfer speeds of DSL services range from 128 kilobits per second to 24,000 kbit/s. More ...
Network Administrator Street Smarts: A Real World Guide to CompTIA Network+ Skills
Hit the ground running with the street-smart training you'll find in this practical book. Using a "year in the life" approach, it gives you an inside look at network administration, with key information organized around the actual day-to-day tasks, scenarios, and challenges you'll face in the field. More ...
What is Cloud Computing?
You can't be sure where a specific Internet device is, it's just out there in the cloud of devices that is the Internet. An individual connected to the Internet can use an application that's in the cloud. An organization can place their data in the cloud. More ...
Definition: Cloud Computing
We keep hearing the term Cloud Computing, but what is it? Cloud Computing is a network of shared resources anywhere in the World that can be quickly provisioned in response to customer demand. More ...
Network+ Certification Exam Tutorial - How And When To Use Virtual LANs (VLANs)
From your Network+ exam studies, you know that switches forward broadcasts, and that sounds great, but that's not always a good thing. A switch can have anywhere from 12 ports to 80 or more, and by default all hosts connected to that switch are going to be in the same broadcast domain. More ...
What is an Ethernet Crossover Cable?
When connecting two computers together without a switch or router in between you need a special cable, called a crossover cable, that has the transmit wire pair swapped with the receive wire pair. More ...
Network Cabling For Beginners
Cabling is the foundation of your network, it is the medium that connects all your computers and servers together and is probably one of the most important and often overlooked items in business networks. More ...
Computer Networking Basics
A basic network consists of two or more computers connected to each other by cable. Computers that are connected to the network can send messages or email back and forth, and can share data, applications, and peripherals. More ...
