IP version 6 (IPv6) is the new version of the Internet Protocol (IP), intended to replace the older IPv4 which is still employed on the vast majority of Internet hosts. IPv6 increases the IP address size from 32 bits to 128 bits to support a much greater number of addressable hosts. IPv4 can support 232 […]
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In this tutorial we will see a special case of high availability scenario using HSRP with object tracking. Most modern enterprise networks in today’s deployments require some form of high availability depending on the uptime needed and the criticality of the service. The network infrastructure elements that are usually needed to be highly-availability include network […]
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There are some networking terms and concepts that are so fundamental and important that every TCP/IP networking professional must know them by heart. One of these fundamental concepts is VLAN Trunking. What is VLAN Trunking in Networking? A VLAN Trunk falls into Layer 2 of the OSI model and is related to network switching. When […]
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Network Switches form the backbone of computer networks and are one of the main building blogs of a Local Area Network (LAN). A network switch usually operates at Layer 2 of the OSI model (working with the Ethernet protocol) but there are switch models that implement also routing, which can be considered as Layer 3 […]
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Technology and IT training is booming as professionals must keep sharpening their skills and knowledge to stay competitive. However, technology is not the only field that people pursue additional knowledge and training. Many individuals want to expand their education and knowledge in a broad range of fields such as marketing, software development, information security, business, […]
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Udemy is an online course platform that lets you learn pretty much anything at any time. Once you’ve purchased a course, you get lifetime access to it so you can truly train at your own pace. People have been using this site for progressing in their current career, working towards a career change, and learning more about their […]
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One of the most useful and popular commands used on Cisco devices is the “show interface” command. It can be very useful at troubleshooting connectivity issues and physical port issues, check the status of physical ports, watch how much traffic is passing through the interface, which IP address is assigned to the interface (for Layer3 […]
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Online learning platforms exploded in popularity a few years ago. Recently, a handful of platforms have fought their way to the top in the market of MOOCs (Massive Open Online Course). Both Udemy and Coursera often come up in conversations about the best learning platforms. A given person might assume they offer a similar experience […]
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The key difference between routers and switches in TCP/IP networks is that Switches primarily function to provide Layer 2 connectivity and Routers provide Layer 3 connectivity (as described in the OSI layer model). What exactly does this mean? From a high level view it means that switches allow hosts to communicate as long as they […]
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For businesses, the task of network and IT infrastructure monitoring remains highly important. A company cannot afford to ignore the security and performance of its network and IT resources. Nagios remains one of the most popular solutions for IT infrastructure monitoring today. An entire suite of software allows businesses to take control and have visibility […]
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In this configuration tutorial I will show you how to configure a GRE tunnel between two Cisco IOS routers. One of the routers is located behind a Cisco ASA 5500 Firewall, so I will show you also how to pass GRE traffic through a Cisco ASA as well. As you might know already, GRE tunnel […]
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In these days of uncertainty around employment, IT remains a solid option for those who either have the qualifications or those who are seriously thinking about a career change. In this article I’ll discuss the best-paying jobs, both in the core networking field and in network security as well. There are many roles and job […]
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The Cisco ASA 5500 series of firewall appliances has been in the market for a long time when they replaced the older PIX hardware firewalls. The new generation of-course listens to the name ASA 5500-X which is currently in the market. However many professionals and companies still have older ASA 5500 series firewall appliances in […]
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