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When it comes to data-loss prevention, good network security can make all the difference, as Intel and its former employee, Biswamohan Pani, discovered.

Pani was indicted by a grand jury last week for allegedly stealing more than $1 billion in Intel's intellectual property after the former design engineer jumped ship to competitor AMD.

The drama began when Pani, whom Intel described in the indictment as a low-level employee, gave notice to quit his job, telling his employers that he was pursuing an opportunity with a hedge fund, although he had already been offered a position with the chipmaker's rival.

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New research has found that about 1.3 million domain name servers across the world are still exploitable by the Kaminsky vulnerability, a flaw hackers can easily use to bring down websites and email servers.

Domain name system (DNS) servers are the address books of the Internet. They translate URLs into IP addresses, allowing clients and servers to communicate across the Internet.

In July, security expert Dan Kaminsky revealed that he had discovered a flaw in the DNS protocol. The DNS flaw allows hackers to impersonate any website and trap unsuspecting users. Hackers can also use the flaw to disrupt More...

I'm having a problem with a local competitor and need to get his IP address or possibly the range he is using so that I can exclude his IP/IPs from seeing my website. I'm sure he is on a wireless network and should be able to take a laptop within range...

Does the restriction of access by MAC addresses also extend to a wired network connected to the wireless router, or does it only restrict the wireless clients? If the wireless router has access restriction based on MAC addresses, then the...

I have Exchange 2000. I didn't have any problem when I dialed up to the server to retrieve my emails before, but since I've installed my ISA server I haven't been able to retrieve them. Can you help me?

I also had another question regarding the above...

Why are patch panels required, and why are they not directly connected to switches? In a rack, there can be multiple switches with multiple ports. So routing cables from one rack to another becomes very difficult, and if you have to connect a...

I want to configure Cisco 3750 Layer 3 switch for fallback IOS booting, so that when the IOS of the switch gets corrupted it should automatically boot from the IOS kept on TFTP server. I have searched a lot on Google but I am not getting how to...

If you're looking for a new take on network security, listen to our three-part podcast series on preventing data theft and leakage with Christopher Burgess, author of the recent book, "Secrets Stolen, Fortunes Lost: Preventing Intellectual Property Theft and Economic Espionage in the 21st Century." Christopher is a senior security advisor with Cisco Systems.

In this podcast, Dennis Drogseth and Kara Gattine focus on application benchmarking and quality of experience in order to determine if networked applications are functioning optimally and users are productive.

Learn about common wireless LAN vulnerabilities and how a few best practices can change wireless LAN issues from a problem into a helpful tool for any enterprise in this 10-minute podcast with Burton Group analyst Paul DeBeasi.

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 small scale... (Continued)

Thermoelectric cooling is a way to remove thermal energy from a medium, device or component by applying a voltage of constant polarity to a junction between dissimilar electrical conductors or semiconductors...(continued)

Wi-Fi Multimedia (WMM), previously known as Wireless Multimedia Extensions (WME), is a subset of the 802.11e wireless LAN (WLAN) specification that enhances quality of service (QoS) on a network by prioritizing data packets according to four categories... (Continued)

Network Based Application Recognition (NBAR) is a mechanism that classifies and regulates bandwidth for network applications to ensure that available resources are utilized as efficiently as possible. Cisco Systems developed NBAR as part of its Content Networking platform for implementing intelligent network services... (Continued)

Cisco Certified Network Associaten (CCNA) is an entry-level certification for the Cisco certified professional program.

Deploying a wireless network can present many physical, technical and managerial challenges. Just ask Nicholas Doggett, Director of Network Architecture at the National Railroad Passenger Corporation (Amtrak). SearchNetworking.com asked Doggett how he was able to equip stations and moving trains with Wi-Fi after his case study presentation, "Improving the...

Certification still carries weight when you are looking for a networking career move, according to 'CCNA Official Exam Certification Library (CCNA Exam 640-802), 3rd Edition' author, Wendell Odom...

Wireless technology offers terrific advantages but also presents challenges to both network pros and end users. In this Q&A, John Ross -- author of "The Book of Wireless: A Painless Guide to Wi-Fi and Broadband Wireless" -- talks about trends in wireless technology and usage, and discusses some of its risks and challenges...

Most network security products focus on keeping the bad guys -- Trojans, viruses and hackers -- outside of the network, but data loss prevention (DLP) keeps the good stuff -- sensitive enterprise data -- in. With more business data leaks tainting the reputations of companies like TJX and Hannaford, it's important not only to keep your information secure but to keep it from...