As e-commerce continues to proliferate and deliver profitable results, more business is being done online. The growing adoption of online retailing, Internet banking, cloud-based data storage and other commercial services represents a natural evolution of Internet use. For online businesses, however, any downtime can dramatically impact the bottom line. As a result, the growing scale […]

In this article I’ll describe a few ways to verify over the network if a remote TCP port on a host is open or not. This is a popular troubleshooting method to identify if a specific service or application is running on a remote server or computer. As you might know already, when an application […]

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are both Layer 4 transmission protocols in the OSI model. However, these two protocols are quite different. From a high level view you could say that TCP is reliable and UDP is unreliable. Why then would we use UDP? UDP Characteristics Due to UDP being able […]

CIDR was invented to facilitate better and more efficient allocation of IP addressing and especially IPv4 addresses which started running out pretty fast when the whole Internet accelerated its pace during the last 2-3 decades. What is Classless Inter-Domain Routing (CIDR) As you know, an IPv4 address consists of 32 bits and is represented as […]

If you have studied the OSI model with its 7 Layers that describe communication on computer network systems, you should know that the Ethernet standard lies in Layer 1 (Physical) and Layer 2 (Data-Link) of the OSI model.  In this article we will focus on the physical (Layer 1) part of Ethernet, which mainly focuses […]

Networking is at the center of all information sharing and Internet activities, and most homes and businesses have some sort of networking technology used for internet access and for enabling the business communications and functions. However, many people struggle with some of the fundamental concepts involved in computer networking. Both Local-Area Networks, or LANs, and […]

The internet and intranet are closely related terms. Some individuals may get these terms confused or use them interchangeably. While there are similarities, the internet and intranet are used for very different purposes. What Is an Internet Network? When you visit a website or use a mobile app that requires an internet connection, you are […]

Computer networks keep changing the way we live and do things in the 21st century. This is because virtually every computing activity or information sharing we do today depends on one form of network or another. The Internet is a very good example of a computer network that allows users to get information from any […]

Computer networking has been around for several decades, which is the backbone of what we all know as the Internet today. The Internet is simply a network of networks, which means there is no such thing as a standalone computer on a network. For a user or host computer to participate in data and resource […]

As Network Engineers we need to be versatile and troubleshooting-savvy in our work environment. In addition to having strong knowledge of networking protocols and commands on network devices (routers, switches, firewalls etc) we need also to have very good knowledge of IP and other networking related commands on end-point devices such as Windows computers, Linux […]

My name is Harris Andrea and I would like to extend a warm welcome to you. About me in a few words. Let me tell you a story. When I was in my last year in University (in the late 90’s) I had to take some courses around TCP/IP and computer networking. That was the […]