November 2008

November 30, 2008 30 Nov'08
Why do Linksys WMP300N wireless cards have three antenna connectors?

Before you make a larger antenna for your wireless network card, know how the Linksys WMP300N connects to its antenna, and understand why it has three connectors. Continue Reading
November 28, 2008 28 Nov'08
Can building T3 lines using satellite be cheaper than a carriers'?

Would building your own T3 leased line be cheaper than a standard carrier's service? Our networking fundamentals expert explains this and how a large capacity link reacts over satellite communication, in this Ask the Expert response. Continue Reading
November 27, 2008 27 Nov'08
Internet Routing in Space (IRIS)

Internet Routing in Space in Space, also known as (IRIS), is a project being conducted by the U.S. Department of Defense to place an IP (Internet protocol) router on a geostationary satellite... (Continued) Continue Reading

November 26, 2008 26 Nov'08
Wireless LAN investment chugs along during recession

A worsening economy hasn't dampened enterprise interest in wireless LAN investment. Companies will turn to the technology to save money and improve productivity during hard times. Continue Reading
November 25, 2008 25 Nov'08
HP ProCurve could threaten Cisco's dominance

The New York Times has an interesting article about the rise of ProCurve, Hewlett Packard's networking division. Gartner analyst Mark Fabbi told the Times that Procurve's revenue has grown by 40% ... Continue Reading
November 24, 2008 24 Nov'08
Five things network administrators do to mess up their enterprises' virtualization

Network monitoring authority Paessler PRTG has seen the good, bad and ugly of network designs that prevent monitoring a system, which is why their product line solutions cover everything from ... Continue Reading
November 24, 2008 24 Nov'08
Differences between WLANs, Wi-Fi and WiMax

Wireless networking expert Lisa Phifer explains the differences between WLAN, WiMax and Wi-Fi and provides an excellent tutorial on what separates Wi-Fi from WLAN. Continue Reading
November 21, 2008 21 Nov'08
Microsoft offers free certification exam retake

Can't afford to get certified? Well, these days, with an even more competitive job market, you can't afford not to be. The good news is that Microsoft is giving you two incentives to certify for ... Continue Reading
November 20, 2008 20 Nov'08
phase-change cooling (vapor cooling)

Phase-change cooling, also called vapor cooling, is a microprocessor-cooling technology that works according to the same principles as a conventional refrigerator, freezer or air conditioner. The principal components of a phase-change cooling system... Continue Reading
November 20, 2008 20 Nov'08
Network consolidation in data centers essential to reducing costs

The next generation of data center design puts a focus on speedier, better-managed networks to do more work at half the price. Continue Reading

November 19, 2008 19 Nov'08
Return-all-values script: Managing Windows networks using scripts, Part 13

One way to manage your Windows network is through scripts. The particular workhorse script described in this tip can return all values of all properties of a specific instance of a Windows Management Instrumentation (WMI) class to give you useful ... Continue Reading
November 18, 2008 18 Nov'08
HTTP error code troubleshooting, Part 2: How to use IIS tool WFetch

You can understand what's causing an HTTP error by looking at the error code, but sometimes that's not enough. In this tip, learn how to use network analysis tool WFetch, from Microsoft's Internet Information Services (IIS) 6.0 Resource Kit, to ... Continue Reading
November 18, 2008 18 Nov'08
During a recession, align the network with business priorities

During the recession, network managers should align the network with corporate goals to survive budget cuts. At the Gartner Enterprise Networking and Communications Summit, an analyst lays out a blueprint for success. Continue Reading
November 17, 2008 17 Nov'08
LANs vs. WLANs: Which network designs are used for each company size?

Which network design is easier to implement, LANs or wireless LANs? Our network administration expert explains this and which designs best fit particular functions and areas of your organization. Continue Reading
November 13, 2008 13 Nov'08
Poor data-loss prevention practices almost cost Intel a billion

While Intel's network security logged meticulous employee access data, red flags weren't raised to stop one potential thief until he had made off with the data. Continue Reading
November 12, 2008 12 Nov'08
More than 1 million DNS servers still vulnerable to Kaminsky

More than 1.3 million DNS servers are still exploitable by the Kaminsky vulnerability, according to new research from vendors Infoblox and DNSstuff. Continue Reading
November 12, 2008 12 Nov'08
How can I block my competitor's IP address range from my website?

Are you looking for free network tools to find an IP address range? This advice from our security expert shows you whois tools available to you and then explains how to block these ranges from viewing your Web resources, in this expert response. Continue Reading
November 11, 2008 11 Nov'08
Best practices for securing your wireless LAN

Perhaps the biggest network security concern for many enterprises is securing a wireless local area network (WLAN). This three-part expert lesson provides best practices for securing a WLAN in the enterprise. Lesson 1 focuses on methods of ... Continue Reading
November 10, 2008 10 Nov'08
cognitive radio (CR)

Cognitive radio (CR) is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied ones... (Continued) Continue Reading
November 10, 2008 10 Nov'08
Peltier effect

The Peltier effect is a temperature difference created by applying a voltage between two electrodes connected to a sample of semiconductor material. This phenomenon can be useful when it is necessary to transfer heat from one medium to another on a ... Continue Reading