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Network Cabling
The cross-over (or crossover) CAT5 UTP cable has to be one of the most used cables after the classic straight-thru cable. The cross-over cable allows us to connect two computers without needing a hub…
Network Fundamentals
Power over Ethernet (PoE) was invented by PowerDsine back in 1997 and the first power injector (Midspan) was installed in 1998! Many manufacturespartnered with PowerDsine to make useof this innovatio…
Routing
This article explains how OSPF uses Link State Advertisement (LSA) to exchange information about the network topology between routers. When a router receives an LSA, it is stored in the Link-State Da…
Network Protocol Analyzers
Troubleshooting network problems can be a very intensive and challenging process. Intermittent network problems are even more difficult to troubleshoot as the problem occurs at random times with a ra…
Network Protocols
Our previous article was an Introduction To The ISDN Protocol. This article dives a bit deeper by examining ISDN Layers, Protocols & Components. ISDN uses circuit-switching to establish a physic…
Windows Servers
If your organization is planning to migration from a Hyper-V virtualization environment to VMware then this FREE webinar is just for you. Aimed toward Hyper-V and VMware admins this webinar will cov…
Network Fundamentals
A Denial of Service (DoS) attack is a malicious attempt to disrupt the normal functioning of a website, server or network by flooding it with traffic or overloading its resources. The aim of such an…
ICMP Protocol
The Internet Control Message Protocol (ICMP), is a very popular protocol and actually part of an Internet Protocol (IP) implementation. Because IP wasn't designed to be absolutely reliable, ICMP came…
Linux - Unix
When you are using Vim, you want to know three things - getting in, moving about and getting out. Of course, while doing these three basic operations, you would like to do something meaningful as wel…
Windows Workstations (XP, 7, 8, 10, 11)
Not many people are aware that Windows 7 has built-in capabilities that allow it to be transformed into a perfectly working access point so that wireless clients such as laptops, smartphones and othe…
Cisco Services & Technologies
This article extends our DMVPN article series by answering common questions regarding the differences between Single Tier Headend and Dual Tier Headend architectures. When hearing the DMVPN terms si…
Routing
This article covers basic OSPF concepts and operation. We explain how OSPF works, how OSPF tables are built on an OSPF-enabled router and their purpose (Neighbour Table, Topology Table, Routing Table…

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