[2004-05-24] The Cisco Three-Layered Hierarchical Model
Cisco has defined a hierarchical model known as the hierarchical internetworking model. This model simplifies the task of building a reliable, scalable, and less expensive hierarchical internetwork because rather than focusing on packet construction, it focuses on the three functional areas, or layers, of your network:

[2004-05-24] Cabling Cisco Devices
Unshielded Twisted Pair (UTP) is a cable that has four pairs of wires twisted inside it to eliminate electrical interference. UTP cables are connected using RJ-45 connectors that have eight connector pins. The data equipment that is used for internetworking is classified as Data Terminal Equipment (DTE e.g. router interfaces) and Data Communication Equipment (DCE e.g. A WAN connects DTEs through DCE network).

[2004-05-24] Selecting Cisco Products
You must understand the business requirements of the network before buying a product. Based on the requirements, you can select the appropriate Cisco products.

[2004-05-21] Integrating/Improving Performances of Tomcat and IIS on Windows Server
IIS is Microsoft's Internet Information Server running on Windows Servers family. Tomcat is world wide used web server built on Java platform for JSP/Servlets. Due to ease of operating and maintaining IIS in windows environment, we still prefer to buy the windows server and run IIS for websites and by default we run Tomcat on port 8080 as the default installation.

[2004-05-07] Installing MRTG on a Windows Platform
MRTG is the most popular open source performance measuring tool being used around the world today. While MRTG is open source, it has been widely adopted by major companies everywhere who use it to measure network performance and adherence to SLAs, among other things. For an interesting snapshot of who is using MRTG, and for what purpose, go to MRTG's "Where, What, How" page and have a look at some of the interesting things MRTG is being used to track. Although MRTG started out as an application to measure network performance on routers (MRTG stands for "Multi Router Traffic Grapher"), it is being used today to graph everything from traffic jams in the Netherlands to the local temperature in Wroclaw. If you can provide a numeric value to MRTG, it can produce a graph of it.

[2004-05-04] Layer 2 Switching and Bridging
Any look at network switching concepts will ultimately lead to a discussion about network bridging, and vice versa. At the end of the day, the roles played by a bridge and a switch are more or less identical - they help to break a network up into a number of smaller collision domains. Recall from earlier in the series that a collision domain is simply a group of computers amongst which data collisions can occur. For example, when connecting systems using a hub, all systems are considered to be part of the same collision domain, since the hub will simply forward data out all ports, with no regard for where the actual destination host is located.


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