Todays enterprise network is heavily focused on providing as near to 100% uptime as possible. Newer technologies such as virtualization and server clusters have been a focal point in achieving this level of service for some time now. However, an often missed opportunity to provide that level of service exists in the core of your infrastructure. Many medium size organizations will implement a server monitoring resource to measure and track the uptime on their core applications and infrastructure servers such as DHCP, DNS, SharePoint, Active Directory, and so on. Often times this monitoring server is located within the data center, and likely on the same subnets as the servers themselves. This can quickly skew your uptime numbers in the sense of “can my users reach the servers?”. While true, the uptime of the servers may be near 100% from the standpoint of the monitoring system, that does not indicate the ability for your users to reach the servers, or in the same concept, your servers to reach your users. Enter default gateway redundancy.
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In my chase for CCNP I came across virtual links while studying for the CCNP ROUTE exam. When I first read through the concept I was slightly lost during the description. However, upon a couple of runs through a lab it became clear on how easy the were. Before I list the condensed two step (or focus points if you will) to look at let’s look at what a virtual link is and why we would use it.
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I often get asked what the best way to study for an Information Technology certification is and what it entails. Throughout my career I have taken a number of certification and have developed a strategy that has been working for me with relatively good success for quite some time. While I understand that everyone has a diferrent learning style, and learns at a different pace, I believe many of the concepts can be adjusted to the individual. In fact, my process relies upon creating a timeline based on your own learning goals. In this article I am going to outline my certification preparation techniques and some of the tools I use to accomplish my training. Most of the tools I use are no-cost freeware and readily available on the internet. A quick google search should suffice in obtaining most of them.
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