Essential Network Concepts Part 1
Welcome to article number 4 in my Cisco CCNA in 15 minutes a week series. This week's article begins the move beyond network models and into actual networking concepts. Prior to getting into the details of Cisco devices and their configuration, you'll need a solid fundamental understanding of not only network concepts, but also technologies, protocols, and equipment. This article will be the first of a few that will begin covering some of these critical areas; this particular article provides an overview of basic network equipment.
Directory:
> Articles > Network Systems
Date: 2004-02-27
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Neglect and Misunderstanding of Backups
I had a call this week from a client who needed a file restored from backup. I had set them up with DVD-RAM and a Supertar a year ago, and had labeled five cartridges with Mon, Tues, etc. I know that (or thought I knew) they followed this rotation for a while, because I had used the previous day's backup to restore files for them earlier this year.
Directory:
> Articles > Network Systems
Date: 2004-02-23
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SME Server Local Networks and VPN's
The SME Server (formerly E-Smith) normally rejects attempt to send mail outside of its own domain if you are connecting from somewhere other than the local lan. This is correct behaviour; otherwise anyone could use your server as a mail relay and you'd become an inadvertent spammer rather quickly.
Directory:
> Articles > Network Systems
Date: 2004-02-23
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Performance Optimizing Syslog Server
We are quite often asked how many syslog message per second MonitorWare Agent can receive. The answer is not as simple as it may look. It largely depends. So I finally thought I write this brief article on the factors that influence syslog server performance. Obviously, you can also use it as a rough guide to optimizing your setup.
Directory:
> Articles > Network Systems
Date: 2004-02-19
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Xinetd
Xinetd is a replacement for inetd, which was the original Unix super-daemon used to start network services on demand. The reason for inetd goes back to days of low memory and poor memory management: you didn't want to keep a service running in memory if it was infrequently used. One process (inetd) would listen for connections on appropriate ports, and fire off the appropriate service when a request came in.
Directory:
> Articles > Network Systems
Date: 2004-02-19
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Tightvnc, Chicken of the VNC
VNC is "Virtual Network Computing" and is a crossplatform method of allowing remote access to desktops (Windows or Unix/Linux, Mac and others)). It is conceptually like using Terminal Services or PcAnywhere etc for Windows but is license free and of course capable of serving Linux/Unix machines also.
Directory:
> Articles > Network Systems
Date: 2004-02-12
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Understanding Network Models - The Cisco Network Design Model
This article focuses on another important network model, the Cisco hierarchical network design model. Very different that the OSI model, this model is used as the basis for designing Cisco networks for security and performance. The article provides an overview of the roles and responsibilities of each of the model's 3 layers.
Directory:
> Articles > Network Systems
Date: 2004-02-05
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