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The OSI Model

  • November 01, 2007 01 Nov'07

    Mobile TV slowly becoming a reality for American cellular subscribers

    Mobile TV rollouts continue moving forward with the major service providers, despite some daunting challenges.

  • November 01, 2007 01 Nov'07

    MPLS implementation gotchas

    In this tip on controlling and implementing multiprotocol label switching (MPLS), learn how to eliminate network latency without getting caught in an SLA with a bad service provider.

  • October 31, 2007 31 Oct'07

    Networks in need of a green thumb

    Network power consumption comes in many forms. In part two of SearchNetworking.com's two-part question-and-answer, Gary Audin, president of network consulting firm Delphi Inc., discusses the networking devices that are the biggest power drain and ...

  • October 30, 2007 30 Oct'07

    Green networking: Selling the idea to executives

    Gary Audin knows the network consumes a lot of power. But Audin, president of network consulting firm Delphi Inc., also has some radical ideas that could change that and cut network-related power consumption to a fraction of what it is today. And ...

  • October 23, 2007 23 Oct'07

    What's the opposite of networking?

    Last night I was watching Attack of the Show again and they mentioned a site called BuzzFeed, which picks up the latest and greatest Web trends and conversations and compiles them all with an ...

  • October 12, 2007 12 Oct'07

    Bizarro VoIP: Is it evil? Do you care?

    Recently, Tom Keating at TMC wrote in his blog about Digium acquiring Switchvox, a proprietary Asterisk-based VoIP solution. Keating had interviewed Asterisk inventor and Digium CTO, Mark Spencer, ...

  • October 12, 2007 12 Oct'07

    Is NAC stuck in the mud?

    Around this time last year, network access control (NAC) was the be-all, end-all for network security. Performing pre- and post-admission checks on devices before allowing them access to the ...

  • October 11, 2007 11 Oct'07

    In a cellular world, landline telecoms struggle to define themselves

    As their markets shrink, landline companies shift their focus from POTS to a more integrated approach.

  • October 09, 2007 09 Oct'07

    Network management shortcuts -- Tools and frameworks

    In the new e-book "The Shortcut Guide to Network Management for the Mid-Market," author Greg Shields outlines real-world technologies, processes and guiding steps to help network engineers and IT managers implement effective network management with ...

  • October 09, 2007 09 Oct'07

    Can AT&T's VDSL compete in a fiber world?

    AT&T's VDSL and Verizon's fiber strategies are both tailored to their markets, but both face high hurdles.

  • October 04, 2007 04 Oct'07

    The "other" kind of networking

    For about as long as routers, switches and cables have been connecting critical functions of the business network, people have been using that same technology to connect socially -- whether for ...

  • October 02, 2007 02 Oct'07

    World Cyber Games' network is 'organized chaos'

    An enterprise-grade network was built by ProCurve Networking by HP last week for the World Cyber Games in Seattle. It offers thousands of gamers uninterrupted access.

  • October 02, 2007 02 Oct'07

    IPv6 network's a go for Verizon, others

    IPv6 has become a focus for Verizon and other service providers as IPv4 addresses disappear.

  • September 20, 2007 20 Sep'07

    Multimedia, IMS focus for F5 traffic management

    Multimedia services and IMS traffic management for service providers have become a bit easier with F5 BIG-IP Local Traffic Manager (LTM).

  • September 12, 2007 12 Sep'07

    Core network switch rounds out ProCurve's architecture

    ProCurve Networking by HP launched a new core switch that the vendor and experts said will round out its core-to-edge offerings.

  • September 11, 2007 11 Sep'07

    Telco fiber deployments threaten cable operators

    Telecom fiber deployments for services like video and IPTV could threaten the incumbent cable providers as telcos strive to become multiple service operators (MSOs), according to a recent iSuppli report.

  • September 06, 2007 06 Sep'07

    Network performance problem diagnosis must be proactive

    Diagnosing network performance problems must be more proactive and not hinge on end-user complaints, a new study found. And companies need to fix those performance issues faster.

  • August 28, 2007 28 Aug'07

    FMC, IMS on telecom carrier roadmaps

    FMC and IMS are top of the to-do lists of service providers that are trying to differentiate themselves from the competition, according to a recent Infonetics Research study.

  • August 12, 2007 12 Aug'07

    What is Cisco LEAP/EAP?

    Learn about Cisco's LEAP or wireless EAP, which provides authentication between a wireless client and a WLAN access point using rotating WEP keys.

  • July 30, 2007 30 Jul'07

    Using a packet sniffer for network packet analysis

    A packet sniffer may seem like a humble addition to a network professional's toolkit, but when used correctly, packet sniffers (also known as protocol analyzers) can home in on any number of network problems. "Practical Packet Analysis: Using ...

  • July 19, 2007 19 Jul'07

    Wireless interference can be frustrating (and fun?)

    Wireless interference can sap Wi-Fi connectivity on the WLAN, but there are ways to avoid it.

  • July 16, 2007 16 Jul'07

    Verizon buys Cybertrust, boosts security profile

    Verizon finalized its acquisition of Cybertrust last week, increasing the telecom carrier's security expertise and service offerings.

  • July 15, 2007 15 Jul'07

    Municipal Wi-Fi projects provide wireless broadband

    Municipal Wi-Fi projects in Chicago, Seattle and San Francisco have helped residents gain broadband access.

  • July 14, 2007 14 Jul'07

    Boeing beefs up its extranet with MPLS

    The jet manufacturer says it's moving away from frame relay and ATM to MPLS to increase service to extranet partners, cut costs and increase internal productivity.

  • July 10, 2007 10 Jul'07

    Cisco networking certification targets entry level

    Cisco networking certifications are targeting a new entry-level set with the CCENT certification. Cisco is also adding new elements to its CCNA offering.

  • July 10, 2007 10 Jul'07

    Fiber optic network security a necessity

    Fiber optic networks require security measures to ward off fiber taps and intrusions.

  • June 30, 2007 30 Jun'07

    T1 or wireless? T1 is far more reliable

    Some say fixed wireless is as secure and reliable as high-speed wired service, but one company explains why, for now, it relies on T1 links and uses wireless only in emergencies.

  • June 20, 2007 20 Jun'07

    SonicWall acquisition could hurt Aventail users

    SonicWall acquired Aventail last week, vaulting itself into a larger SSL VPN market, but some warn that Aventail users could take a hit.

  • June 13, 2007 13 Jun'07

    NetFlow network monitoring tools go with the 'flow'

    Network monitoring tool makers are again hyping the use of NetFlow data, promising better network and applications visibility.

  • June 06, 2007 06 Jun'07

    Network access controlled via biometrics

    Fingerprint readers, a form of biometrics, have been used to protect data and endpoints, but now IT is using the security technology to control network access.

  • May 30, 2007 30 May'07

    Security, wireless, VoIP, WAN optimization top Interop want lists

    Security, wireless, VoIP and WAN optimization were key areas of interest for many attendees of Interop Las Vegas 2007, as two separate surveys found.

  • May 21, 2007 21 May'07

    Microsoft, TCG partner on network access control; Cisco takes own route

    Microsoft and Trusted Computing Group today released a new network access control (NAC) specification for interoperability between their NAC and TNC solutions.

  • May 16, 2007 16 May'07

    Retrospective network analysis goes portable

    Retrospective network analysis goes portable with GigaStor Portable from Network Instruments.

  • April 26, 2007 26 Apr'07

    WEP: Wireless security's broken skeleton in the closet

    WEP for wireless security was cracked again recently. Though many will say WEP is obsolete, many companies still use it.

  • April 04, 2007 04 Apr'07

    Windows Vista: Cause to rethink WAN optimization

    Microsoft Windows Vista and Longhorn Server include significantly improved WAN optimization and performance-enhancing technologies, which could make buying a WAN optimization appliance unnecessary and introduce interoperability challenges.

  • March 22, 2007 22 Mar'07

    802.11n will require upgrades

    802.11n, the new Wi-Fi standard on the cusp of being ratified by the IEEE, offers greater throughput and better range than other standards but may require companies to upgrade their wireless network infrastructure.

  • February 28, 2007 28 Feb'07

    SSL VPN secures distributed construction company

    SSL VPN for remote access was necessary for Barton Malow, a massive construction company.

  • February 22, 2007 22 Feb'07

    Network hardware sales up

    WAN optimization, router and switch sales all saw growth in 2006, according to recent studies by Infonetics Research.

  • February 15, 2007 15 Feb'07

    Network hacking for dummies: Not just for dummies anymore

    Network security is achievable if network pros gain control and test their systems, says author Kevin Beaver in his new book Hacking For Dummies, 2nd Edition.

  • February 14, 2007 14 Feb'07

    Networking certifications help engineer excel

    Pursuing a networking career takes a special breed. Here, we profile a senior engineer who left his previous job behind to begin a networking career with the help of Cisco certifications.

  • February 08, 2007 08 Feb'07

    Open source network monitoring and management tools

    Open source network monitoring is catching on, and in some ways it rivals the likes of IBM Tivoli and HP OpenView, among other major players.

  • February 07, 2007 07 Feb'07

    NAC RFPs: Questions to ask

    Network access control (NAC) is still confusing technology. Here are a few questions to ask in your NAC RFP to ensure you get what you want out of a solution.

  • January 25, 2007 25 Jan'07

    Remote access and remote support free up network pros

    Remote access and remote support have freed up the networking staff at a sprawling medical campus.

  • January 11, 2007 11 Jan'07

    WAN optimization staves off bandwidth upgrade

    WAN optimization has given Columbia Forest Products enough of a boost to avoid a bandwidth upgrade for six years.

  • January 10, 2007 10 Jan'07

    Network security -- Taking the layered approach

    Network security is tricky business. In his new book Hack the Stack, author and security expert Michael Gregg outlines how to secure the network using the OSI model.

  • January 03, 2007 03 Jan'07

    Scan your network for devices

    There are dozens of different devices that can link to the network. SecureWave recently released a free tool that allows network administrators to determine which devices have been hooked up and when.

  • December 06, 2006 06 Dec'06

    CCNA: Earn more by knowing more

    Many already in the networking and telephony field feel they don't need to get CCNA certified, but participants in SearchNetworking.com's CCNA Video Mentor contest expressed not only their desire to obtain CCNA certification, but their desperation ...

  • November 08, 2006 08 Nov'06

    Wireless technology: Five myths debunked

    Cisco, along with Forrester Research, recently issued a report calling most wireless LAN fears mere myths, and a campus-wide, all-wireless deployment appears to prove that theory.

  • November 07, 2006 07 Nov'06

    NAC and endpoint security frameworks: Which way to go?

    We've all heard about the Cisco and Microsoft initiatives for NAC, plus the standards-based Trusted Network Connect. What's the difference between these approaches and which, if any, should you choose to secure your endpoints and keep your local ...

  • November 03, 2006 03 Nov'06

    Network access control: Should you implement now?

    Implementing network access control (NAC) is a big step, and deciding whether and when to start is daunting. Networking experts say the sooner the better, but before going into NAC full throttle, enterprises must first determine their motivation.

  • October 26, 2006 26 Oct'06

    Defending an expansive definition of NAC

    There is a good bit of controversy about what constitutes a complete NAC solution. Broadening our definition and expectations will enable networking pros to tightly integrate NAC into the IT infrastructure and leverage it as a true access control ...

  • October 11, 2006 11 Oct'06

    A remote worker can threaten network security

    Remote workers are wreaking havoc on their networks. A recent study commissioned by Cisco found that teleworkers are putting security at risk.

  • October 05, 2006 05 Oct'06

    Cisco's Information Security Specialist Certification

    Cisco dishes up an entry-level security certification that meets tough government security standards.

  • October 04, 2006 04 Oct'06

    Cisco, Cognio team up on Wi-Fi interference detection

    Cisco and Cognio have partnered to troubleshoot and diagnose problems on the Wi-Fi network.

  • September 26, 2006 26 Sep'06

    Open source router on par with Cisco, users say

    To avoid paying top dollar for Cisco routers, two users say Vyatta's Open Flexible Router is a viable alternative to the proprietary norm, with pluses and minuses, of course.

  • September 25, 2006 25 Sep'06

    WAN optimization: Making the business case

    WAN optimization promises boosted data throughput and faster network response times. That, coupled with the prospect of saving money, often makes the business case for WAN optimization nearly a no-brainer.

  • September 21, 2006 21 Sep'06

    WAN optimization strategies: Making the right decision

    WAN optimization products are flooding the market, and choosing one can be tricky. We examine the options and see how a few companies with different needs found the right technology to solve their WAN traffic problems.

  • September 18, 2006 18 Sep'06

    Citrix tackles WAN optimization, application acceleration

    Citrix yesterday unveiled WAN optimization tools and an enhanced Web application delivery system at Interop New York. Both are said to speed applications over the network.

  • September 16, 2006 16 Sep'06

    TCP/Internet Protocol and OSI

    This explains the layers in TCP/IP and the OSI model, and what the differences are.

  • September 07, 2006 07 Sep'06

    Cisco, SAP team-up marries network with risk management

    Cisco and SAP team up to market governance, risk and compliance (GRC) and networking combo. The application/networking vendor relationship highlights SONA's first major proof point to networking professionals.

  • August 24, 2006 24 Aug'06

    Microsoft and Cisco ready to demo NAP/NAC

    There is harmony at last between two high-tech elephants. At a Boston security conference, Microsoft and Cisco will demonstrate how their competing security technologies will co-exist.

  • August 22, 2006 22 Aug'06

    Network visibility thwarts crime, identifies unwanted traffic

    Networking monitoring tools have helped Vanderbilt University's network team to uncover unwanted and troubling traffic. In some cases, the tools have turned the team into crime fighters.

  • August 09, 2006 09 Aug'06

    Network Defenders

    The mission of our Network Defenders series is to provide user stories in which networks were breached or broken by a security threat, and then later fixed with various technology solutions that improved the level of enterprise security. These users...

  • August 04, 2006 04 Aug'06

    Cisco security flaw under scrutiny

    Cisco continues to investigate a potential PIX firewall flaw, but it and other vendors say sharing security information quickly and indiscriminately is always the best policy.

  • July 26, 2006 26 Jul'06

    Network policy: 'No wireless' restriction enforced at Blue Cross

    Blue Cross of Idaho had a "no wireless" policy on paper but never really enforced it -- until a team of auditors said the company had better do something.

  • July 19, 2006 19 Jul'06

    Cisco's NAC play: Good for users, or just for Cisco's bottom line?

    Expert opinion on how subtle moves in Cisco's NAC department suggest that the company wants to be a major security player -- selling lots and lots of equipment in the process.

  • July 19, 2006 19 Jul'06

    Cisco NAC appliance secures enterprise networks

    Cisco NAC as a framework is a daunting task. But it was made easier with its latest NAC 4.0 appliance, which analysts say can ease the NAC transition for network engineers.

  • July 13, 2006 13 Jul'06

    News briefs: Cisco security facelift; new WAN probe; bandwidth management

    Cisco upgraded its Network Admission Control (NAC) appliance and rolled out two Adaptive Security appliance models. New WAN probe from Network Instruments provides historical analysis. Bandwidth-management tool introduced by Blue Coat.

  • June 22, 2006 22 Jun'06

    VoIP protocol insecurity

    Like many Internet protocols, SIP was designed with simplicity, not security, in mind. And, although H.323 was created to meet broader goals, security issues have plagued it as well. Expert Lisa Phifer examines some of the vulnerabilities in this ...

  • June 14, 2006 14 Jun'06

    Cisco looks ahead with services aggregation vision

    At Interop Las Vegas, Cisco Systems Inc. announced several key enhancements to its 7200 Services Aggregation Router, boosting its capabilities to harness at headquarters the deployed base of integrated services routers (ISR) at branch offices.

    ...

  • June 06, 2006 06 Jun'06

    SSL VPN use fueled by security needs

    A poll of 250 small, midsized and large companies conducted by Infonetics Research found that security is still the biggest driver for deploying SSL VPNs.

  • June 01, 2006 01 Jun'06

    Security flap opens financial services firm's eyes

    Thomas Weisel Partners, a financial services firm, caught a bug; a worm really. But now they monitor network traffic more closely to ensure it doesn't happen again.

  • May 30, 2006 30 May'06

    Virtualization, Cisco chop one network into many

    Philips Research Laboratories already had a pretty impressive network, but when the Netherlands-based firm had to partition it and give a host of other companies access, that's when things got interesting.

  • May 24, 2006 24 May'06

    Gartner: WiMax all hype, VoIP for real

    At its annual Symposium event, Gartner explained why over-hyped networking technologies like VoIP and MPLS will pan out and why WiMax and EV-DO are likely to flame out.

  • May 24, 2006 24 May'06

    Net Intelligence

    A call for IPS, network behavioral technology consolidation

  • May 24, 2006 24 May'06

    Net Intelligence column: A call for IPS, network behavior consolidation

    Networking professionals stand to benefit from consolidation under way in the overcrowded security market as intrusion prevention providers, under competitive pressure to advance their application infrastructures, are integrating network behavioral ...

  • May 15, 2006 15 May'06

    Wired, wireless access control unified with HP ProCurve module

    HP ProCurve today announced a module to its 5300 switch that unifies the wired and wireless networks and makes them centrally manageable.

  • May 11, 2006 11 May'06

    Words to Go: VoIP

    This handy, printable glossary will assist you with terminology related specifically to voice over IP.

  • May 09, 2006 09 May'06

    NAC, IDS cure medical school's security woes

    UMass Medical School has courses on illnesses, but what happens if the network gets sick? The school has taken steps to ensure that won't happen.

  • May 04, 2006 04 May'06

    Security is the name of the game at Interop

    Messaging security was a hot Interop topic, rivaled only by every other aspect of security. Vendors rolled out wares to protect messaging systems and other points on the network.

  • April 27, 2006 27 Apr'06

    Secure LAN switch locks out threats

    ConSentry leads the pack with a switch that combines policy-based security technology with standard switching. Security threats are thwarted and contained at the network edge with combo gear.

  • April 24, 2006 24 Apr'06

    Gartner underscores five overblown threats

    Two Gartner analysts debunk five overhyped security risks they claim are causing companies to miss out on some key emerging technologies.

  • April 24, 2006 24 Apr'06

    Network pros sound off on open source

    Earlier this year, we asked for your input about using open source software and tools for networking tasks. I was thrilled to receive such an overwhelming response from our readership. Here are just a few excerpts:

  • April 18, 2006 18 Apr'06

    News briefs: WildPackets, Cisco, FreeWave and Trapeze in the news

    WildPackets' Apdex rates the quality of user experience; Cisco released a multi-service module for Catalyst 6500 switches; FreeWave 900MHz radio provides a range of more than 60 miles; and Trapeze demos seamless mobility.

  • April 18, 2006 18 Apr'06

    Splunk + Nagios = quick data center troubleshooting

    A lack of prescience in Splunk's spunky search-based troubleshooting tool limited its usage to after-the-fact diagnosis. Adding Nagios, the mighty open source monitoring tool, puts Splunkers one step ahead in the data center troubleshooting race, ...

  • March 16, 2006 16 Mar'06

    Making the SSL VPN decision: What you should know and ask

    A renewed interest in SSL VPNs prompted Forrester Research to pose three deployment-determining questions to prospective buyers before they plunk down any cash.

  • March 09, 2006 09 Mar'06

    All-in-one, branch-office box ready to roll

    Cutting down clutter and costs in the branch office isn't always easy, but one vendor says it has a branch-in-a-box appliance that can take the place of several appliances and rival a few popular multi-function routers.

  • March 08, 2006 08 Mar'06

    Quote of the day

    Quote of the day

  • March 02, 2006 02 Mar'06

    Staying apps aware keeps Continental in the air

    Three years after getting slammed by the SQL Slammer worm, Continental's network is secure. ConSentry Network's role-based provisioning technology keeps apps, users in check.

  • March 01, 2006 01 Mar'06

    Monitoring goes out-of-band

    A new data access switch from Gigamon boosts the number of SPAN ports on the network for out-of-band monitoring.

  • February 15, 2006 15 Feb'06

    Flood of NAC products toughens security decisions

    The continuing flood of network access control products is forcing networking pros to weigh all of the options before securing their networks.

  • February 08, 2006 08 Feb'06

    New WLAN survey, analyzer tools kill dead spots

    AirMagnet this week announced a pair of tools it says can ease wireless site surveys and also find more than a dozen different devices that could be running interference, virtually eliminating dead zones.

  • January 25, 2006 25 Jan'06

    Tick, tick, boom: NAC market ready to explode

    By 2008, the market for NAC enforcement tools will see astonishing growth, hitting $3.9 billion, suggests an Infonetics study.

  • January 17, 2006 17 Jan'06

    Analyst debunks network QoS myths

    QoS is sometimes a necessary evil. But despite a decade in use, many network pros are baffled by it. Here, analyst Robert Whiteley debunks the biggest network QoS myths.

  • January 03, 2006 03 Jan'06

    Survey: Managers crave automated management tools

    A recent survey by Uplogix found 70% of IT executives want automated control over fault diagnosis and recovery tools.

  • December 22, 2005 22 Dec'05

    How's it looking next year? Pretty good, says Cisco

    The pre-2006 word from Cisco is the IT spending lull is petering out. The challenge ahead is getting users to learn to spend money again after so many years of serious belt tightening.

  • December 05, 2005 05 Dec'05

    Cisco offers gear trade-ins, incentives

    Aging equipment and advancing technologies have fueled the need for network upgrades. A program offered by Cisco hopes to ease the financial pain of the transition.

  • November 14, 2005 14 Nov'05

    NetFlow analyzers moving upstream

    As bandwidth consumption and application performance continue to be hot topics, vendors are announcing enhancements to their NetFlow readers and analyzers.

  • November 10, 2005 10 Nov'05

    Voices of Authority: Network planning, management saves money

    Looking ahead at what your network needs could save mountains of cash. SearchNetworking.com expert Carrie Higbie explains some ways to cut costs and get maximum network performance.

  • November 08, 2005 08 Nov'05

    Sniffer updates nothing to sneeze at

    To prove the company is back, Network General this week announced enhancements to its Sniffer line, adding application performance analysis to its network monitoring tools.

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