The OSI Model

  • 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 15, 2006 15 Mar'06

    Could March Madness cripple the network?

    CBS Sports this week will offer all games of the 2006 NCAA basketball tournament online as streaming video. But if end-users tune in, the network could drop out.

  • 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 07, 2006 07 Mar'06

    Public security slip forces Georgia Capitol to lock down WLAN

    More than three years after a TV news crew exposed security flaws in the WLAN at the Georgia State Capitol building, the governor's office is trying again to go wireless.

  • 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 28, 2006 28 Feb'06

    Endpoint security threats meet their match

    Securing the network at every endpoint is changing with some new products that limit, prohibit and protect endpoints and users.

  • February 20, 2006 20 Feb'06

    RSA Conference expands network security options

    Security is top of mind, a fact revealed at last week's RSA Conference. Experts spoke about growing threats and how to avoid them while vendors released products to thwart attacks.

  • 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 09, 2006 09 Feb'06

    SonicWall's e-mail security to stop spam

    SonicWall's acquisition of e-mail security vendor, MailFrontier, promises first-line defense against malicious spam attacks. MailFrontier's e-mail protection technology stops a threat at the enterprise door.

  • 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.

  • February 06, 2006 06 Feb'06

    Network General buys Fidelia, boosts monitoring capabilities

    Network General has acquired Fidelia Technology Inc., a deal the companies say will boost monitoring and analysis capabilities at the network level and beyond.

  • February 02, 2006 02 Feb'06

    WAN acceleration goes remote

    Remote workers have long been ignored in the WAN acceleration space, but one vendor is coming out with a tool to include them, which could also spark a new trend.

  • February 01, 2006 01 Feb'06

    Networking Nuggets: Wireless LAN scans, cheap VPNs, patch management and more

    Here rounds up some of the latest releases from various vendors.

  • 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 12, 2006 12 Jan'06

    Whale hybrid VPN harpoons market

    Whale Communications and Microsoft have teamed up to roll SSL VPN and IPSec VPN into one appliance, and the CIO of Regis University says he can't wait to add it to his network.

  • January 11, 2006 11 Jan'06

    Cisco Spotlight Series: Philanthropy gets plenty of bandwidth

    The need for charitable giving has perhaps never been greater than in 2005, when earthquakes, tsunamis, hurricanes and other events took a tragic toll on millions around the world. Though the tragic events have passed, the need for giving continues ...

  • January 09, 2006 09 Jan'06

    Report: Converged networks spur IP VPN growth

    Voice, video and other real-time, mission-critical applications are prompting companies to ditch their old VPNs and migrate to an IP VPN, according to a study by In-Stat/MDR.

  • 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 19, 2005 19 Dec'05

    Study: Network security market to reach $6 billion

    A pair of studies by Infonetics Research Inc. says the network security market recently topped $1 billion and in the next two years that will increase six-fold.

  • December 12, 2005 12 Dec'05

    Cisco gives experts-to-be a practice run

    Cisco today unveiled the first-ever practice tool for potential CCIE test takers. The four-hour, Web-based practice test closely mimics the extremely challenging lab test and gives test takers performance feedback.

  • December 08, 2005 08 Dec'05

    Application-aware networking to be Cisco's next big play

    Sluggish response times spur Cisco to tackle application-aware networking. The company is seeking the No. 1 market position with its new Application Networking Services.

  • 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 29, 2005 29 Nov'05

    Cherokee Nation sniffs out, snuffs WLAN troubles

    From the comfort of his truck, Jon James has found rogue and unsecured access points and has found out what is causing interruptions on the WLAN in Cherokee Nation.

  • November 17, 2005 17 Nov'05

    Voices of Authority: 'New rules' for networking, telecommunications

    Experience is the best teacher, but in networking it can be just as beneficial (and a lot less painful) to learn from the wisdom of others. In our special series, you'll hear from both practitioners and pundits about how to make the most of your ...

  • November 16, 2005 16 Nov'05

    Cisco introduces unified LAN, wireless mesh

    Cisco made truth of the rumors yesterday, introducing new WLAN products and spinning its own web of wireless mesh.

  • 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. 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.

  • November 07, 2005 07 Nov'05

    New bot may threaten Cisco routers

    The network-aware bot spreads via unpatched Windows flaws and can scope out Cisco routers running vulnerable Telnet or HTTP servers. Separately, the networking giant has fixed a problem with its IPS configuration software.

  • October 27, 2005 27 Oct'05

    Wireless LANs, the new 'secure' network

    Once thought to be extremely vulnerable to attacks, wireless LANs are gaining security traction. Learn why experts and vendors say wireless hackers are no longer an issue and why wireless networks can be more secure than wired.

  • October 26, 2005 26 Oct'05

    What you don't know can hurt you

    One industry observer warns enterprises of the dangers of being unwary or unprepared for potential cyber-attacks.

  • October 24, 2005 24 Oct'05

    Tool gives on-site management capabilities to distributed networks

    Uplogix today introduced Envoy 2.0, a management tool for distributed networks, and one company plans to use it to keep an eye on its global infrastructure.

  • October 20, 2005 20 Oct'05

    Despite boom, IP VPN cost still a hurdle

    A new study shows adoption of IP VPNs surging, but high cost continues to be an obstacle for some.

  • October 18, 2005 18 Oct'05

    Advancement to Cisco's NAC framework boosts security in LAN, wireless space

    The networking giant today announced additions to its security framework, including support for the company's popular Catalyst switches and wireless services.

  • October 17, 2005 17 Oct'05

    Boom predicted for IP telephony, wireless LAN spending

    Wireless LAN and IP telephony are already hot, but IDC expects spending to double by 2009, fueled by implementations in retail, finance, government and professional services.

  • October 10, 2005 10 Oct'05

    Analysts: 3Com trying to woo enterprises with new ad campaign

    Following strategic missteps and profitability woes, 3Com hopes a new ad campaign will remind enterprises that Cisco and HP ProCurve aren't the only vendors in town.

  • October 05, 2005 05 Oct'05

    Cisco slips in LAN switch value rating, excels overall

    A recent survey shows more organizations are dissatisfied with the cost and value of Cisco's LAN switches, while a number of competitors may be gaining ground.

  • October 04, 2005 04 Oct'05

    Cisco Spotlight Series: Service with a smile

    Gary Moore couldn't be prouder. During the past four years, the Cisco Systems Inc. senior vice president has transformed the networking giant's advanced services group from an organization that helps fix products to one that addresses what Cisco ...

  • September 27, 2005 27 Sep'05

    Cisco adds new layers to network defense

    The network giant is teaming up with Trend Micro to help companies keep worm and virus outbreaks at bay and is augmenting internal network security with new software.

  • September 26, 2005 26 Sep'05

    HP strengthens its core

    Change may be in the air at Hewlett-Packard, but its ProCurve networking group is still working to chip away at Cisco Systems with new core switches and management modules.

  • September 26, 2005 26 Sep'05

    Questions abound on ProCurve's strategy, future

    ProCurve says it's business as usual, but speculation that HP's networking group is up for sale has caused some to wonder what the future may hold for ProCurve's products and customers.

  • September 22, 2005 22 Sep'05

    Commoditization or integration?

    Is the network being commoditized? Editor Susan Fogarty offers her view on the issue.

  • September 20, 2005 20 Sep'05

    Cisco security certifications changing

    Those seeking the CCSP and specialization in VPN, firewall and IDS will soon follow different curricula that better reflect Cisco Systems' current product lines.

  • September 08, 2005 08 Sep'05

    Cisco Spotlight Series: The need for speed

    Despite the growth in networking segments like wireless, IP voice and application networking, what has driven the industry from its earliest days is the basic need to transport ever-growing amounts of data from one point to another.

    At Cisco ...

  • September 06, 2005 06 Sep'05

    Going wireless where wires rule

    Wireless technology is pushing deeper into the enterprise, but does it make sense in the data center? Despite no critical driver, experts say there are reasons why it makes sense.

  • August 31, 2005 31 Aug'05

    Time to throw all your security in one box?

    A survey shows more IT shops are considering multi-purpose security appliances. But it still may not be wise to stuff all your vendors in one box.

  • August 24, 2005 24 Aug'05

    Is Cisco still the router king?

    Juniper may be creeping into Cisco's territory, but a recent study found that while 8% of network admins were considering purchasing Juniper routers, 86% were looking to Cisco.

  • August 23, 2005 23 Aug'05

    A layered approach to network security

    With network threats on the rise, one company is using a layered approach -- antivirus, antispyware and special QoS devices -- to ward off outbreaks like Zotob.

  • August 17, 2005 17 Aug'05

    Frame relay still viable for many networks

    Once a product or technology is labeled "mature," that usually means its days are numbered. Typically, it's just a matter of time until something newer, faster and better relegates it to the scrap heap. But in the case of frame relay, that may not ...

  • August 15, 2005 15 Aug'05

    When your vendor goes down in flames

    One fire department loves its Proxim wireless videoconferencing system. However, now that Proxim is no more, it raises the question: Is sticking with a bankrupt vendor's gear an unacceptable risk?

  • August 09, 2005 09 Aug'05

    Cisco Spotlight Series: Bridging networks and applications

    CEO John Chambers says Cisco Systems Inc. hasn't taken enough risks in recent years. If that's true, then its Application-Oriented ...

  • August 04, 2005 04 Aug'05

    Is a U.S. Internet blackout possible?

    A fault in Pakistan's fiber optic cable crippled its Internet access for 12 days. Could something similar happen in the U.S.? Experts discuss the possibilities and how companies should prepare.

  • July 28, 2005 28 Jul'05

    Update: Black Hat exploit underpins need to patch

    Update -- Industry pros say even though a researcher has revealed how a malicious attacker can crash Cisco networks worldwide, the risk to corporate networks remains in question.

  • July 28, 2005 28 Jul'05

    Update: IPv6 risks may outweigh benefits

    Early adopters are transitioning to the next-generation protocol, but evidence -- including a flaw disclosed at this week's Black Hat conference -- suggests IPv6 is a potentially risky change with few benefits.

  • July 26, 2005 26 Jul'05

    Cisco invests in network management

    Cisco's $97 million purchase of network and service management vendor Sheer Networks could supplement its own "poor and generally complex" network management tools.

  • July 22, 2005 22 Jul'05

    Authentication takes a bite out of spam

    Network and messaging experts offer helpful ammunition for enterprise network managers waving the white flag in the battle against spam.

  • July 14, 2005 14 Jul'05

    Chapter of the Week - July 2005

    This month our featured chapter downloads compliment our July Theme Month on IPv6. You'll find chapters focused on IPv6 to help you stay ahead of the curve.

  • July 12, 2005 12 Jul'05

    Network devices simplifying integration, Web services security

    Cisco's planned foray into application-oriented networking helps elevate the work of the early pioneers.

  • July 06, 2005 06 Jul'05

    Is IPsec on borrowed time?

    IT professionals say SSL VPN connections are easier to secure and manage than their IPsec counterparts. But don't count IPsec out just yet.

  • June 29, 2005 29 Jun'05

    Packets that predict the future

    ClearSight says its new Packet Generator not only troubleshoots today's network problems, but can also identify future issues with infrastructure components prior to implementation.

  • June 28, 2005 28 Jun'05

    Can unified branch services rival Cisco?

    While some products offer similar functions, one analyst suggests looking under the hood for an emerging type of device that defies the boundaries of all current categories.

  • June 27, 2005 27 Jun'05

    Access points slim down for summer

    Extreme says its slimmed-down access point is easier to provision, manage and secure; industry experts explain why "thin" APs are strutting their stuff this summer.

  • June 23, 2005 23 Jun'05

    Cisco gets aggressive on emerging technologies

    The networking giant is ramping up its "emerging" technology plans, intending to release cutting-edge wares every few months for the next year.

  • June 22, 2005 22 Jun'05

    Cisco claims role of application interpreter

    Cisco released more detail Tuesday about its application-oriented networking initiative, which could shift the burden of application integration from middleware to the network.

  • June 20, 2005 20 Jun'05

    Tips for a successful wired-wireless network integration

    Tips for a successful wired-wireless network integration

  • June 20, 2005 20 Jun'05

    Vendors look to fuse wired, wireless networks

    As wireless networking vendors strive to integrate wired and wireless networks, Colubris has unveiled a product family that leverages its new vision for network unification.

  • June 07, 2005 07 Jun'05

    HP's core switch may live a shorter life

    Hewlett-Packard has updated several areas of its enterprise networking portfolio, but a strategy change by an OEM partner may mean a shorter life span for its new core switch.

  • June 06, 2005 06 Jun'05

    New enterprise gear may be 3Com's last chance

    The vendor is releasing a plethora of switching, security and management gear for large organizations, and industry observers say the products could be 3Com's last best chance for survival in the enterprise market.

  • June 01, 2005 01 Jun'05

    Cisco Spotlight Series: An afterlife for Airespace

    A little more than four months ago, networking giant Cisco Systems Inc. acquired Airespace Inc., a wireless LAN switch startup, to enhance its wireless networking products line.

    In an unusual move, Cisco assigned two individuals to lead its ...

  • May 31, 2005 31 May'05

    IDC sees bright future for network consulting

    IDC forecasts that the worldwide network consulting and integration market will enjoy steady growth during the next five years. The Framingham, Mass.-based research firm said the market will grow from $24.2 billion in 2004 to $35.8 billion in 2009....

  • May 26, 2005 26 May'05

    Cisco launches app performance strategy with FineGround buy

    To break ground in the application performance market, the networking giant is spending $70 million for vendor FineGround. One analyst says it's likely the start of a major new applications initiative for Cisco.

  • May 25, 2005 25 May'05

    Wireless in the city

    One city's technology, business and community leaders say a citywide Wi-Fi network is not only essential to the city's growth and prosperity, but can also create new revenue for businesses.

  • May 17, 2005 17 May'05

    3Com tips the rift on network security

    LAS VEGAS -- Kip McClanahan, president of 3Com Corp.'s TippingPoint division, is a 15-year veteran of the networking and software industries.

    McClanahan served as CEO at TippingPoint Technologies Inc., which 3Com officially acquired earlier this...

  • May 17, 2005 17 May'05's Cisco Spotlight Series is your window into the executive suite at Cisco Systems. Each month we'll bring you an exclusive interview with a top Cisco executive.

  • May 16, 2005 16 May'05's special coverage of Interop 2005

    If you missed our coverage of Interop 2005 and couldn't make it to Vegas, we've gathered all our articles for you in one place.

  • May 10, 2005 10 May'05

    Cisco Spotlight Series: A router for all seasons

    It's no secret that Cisco Systems Inc. is betting heavily on its line of Integrated Services Routers (ISRs). Already one of the top-selling product lines in its history, the devices are built to run simultaneous services such as data, security and ...

  • May 05, 2005 05 May'05

    Preparing for the CISSP exam

    Get a list of resources to help you prepare for the CISSP exam from your peers and experts in ITKnowledge Exchange.

  • May 04, 2005 04 May'05

    Interop 2005: Kriens articulates opportunities within natural boundaries

    In his Interop keynote, the Juniper CEO endorses industry collaboration and believes in multivendor networks, but some wonder if Kriens just wants to minimize the competition.

  • May 03, 2005 03 May'05

    Expert cautions IPsec replacement

    Is Aventail's new SSL VPN platform the key to IPsec replacement? The vendor says yes, but companies may not want to jump on the bandwagon so soon.

  • May 02, 2005 02 May'05

    Cisco brings multifunction router to the masses

    Announced this morning at Interop, Cisco's new integrated services routers enable more organizations to afford routers offering services such as security and QoS at wire speed.

  • April 28, 2005 28 Apr'05

    Chapter of the Week - May 2005

    This month we present you with our most popular chapter downloads on networking certifications. You'll find an interesting assortment of chapters on CCNA, CISSP, CWNA and CCNP certifications.

  • April 28, 2005 28 Apr'05

    Colubris wires its future to network convergence

    Colubris' new strategy focuses on integrating wired and wireless network infrastructure. It's hoping an increasing focus on network convergence will help it emerge as a competitive force in the Wi-Fi hardware market.

  • April 26, 2005 26 Apr'05

    Networking giants announce acquisitions

    To shore up prospects in growing markets, both Cisco and Nortel are making purchases in areas of increasing importance to each.

  • April 26, 2005 26 Apr'05

    Extreme puts threat mitigation in the core

    Extreme Networks says its new security paradigm -- namely placing threat mitigation in the core switch -- can keep 10 GigE links moving swiftly and eliminate inefficient in-line security devices.

  • April 21, 2005 21 Apr'05

    Industry welcomes next-gen TLS VPN

    Despite being a slow starter, the TLS protocol is taking over for SSL as the de facto VPN technology. Experts offer insight into the benefits of TLS and how it's changing network security.

  • April 18, 2005 18 Apr'05

    Cisco updates high-density enterprise router

    Almost hidden in the networking giant's latest round of carrier-class gear, the new 7604 10 Gigabit Ethernet router updates several features on the vendor's "workhorse" modular platform.

  • April 13, 2005 13 Apr'05

    IPv6 shows signs of life

    A supercomputing firm is teaming up with MCI to figure out how to make the next-generation IPv6 protocol work with legacy applications.

  • April 12, 2005 12 Apr'05

    Cisco senior VP explains unified security initiatives

    In July of last year, Cisco Systems Inc. backed up its words with actions. After claiming that the integration of its security products was a priority, the San Jose, Calif.-based vendor radically reorganized its corporate hierarchy and created the ...

  • April 11, 2005 11 Apr'05

    When router management is your worst nightmare

    Michael W. Lucas is a network engineer with decades of experience in corporate networks. Recently, Lucas authored Cisco Routers for the Desperate, which he said is "designed to be read once, and then left on top of the router until something breaks....

  • April 07, 2005 07 Apr'05

    CA to acquire Concord Communications

    With its $330 million acquisition of Concord Communications, experts say Computer Associates reestablishes itself as a competitive threat in the network management software market.

  • April 04, 2005 04 Apr'05

    Switch line offer Fast Ethernet today, GigE tomorrow

    Alcatel's new Fast Ethernet switches, which morph from Fast Ethernet to Gigabit Ethernet, allow businesses to prepare -- but not pay -- for tomorrow's speeds today.

  • March 30, 2005 30 Mar'05

    Network management outside the cocoon

    Evolution is inherent to all IT disciplines. Inertia is simply antithetical to the very concept of technology, and network management is no exception. As business needs create new demands, network managers are forced to adapt to keep pace.


  • March 29, 2005 29 Mar'05

    Gearing up for next generation of SSL VPNs

    This week Permeo debuts a Layer 5 SSL VPN, and one industry observer says it signifies a new generation of more mature, manageable, secure virtual private networking products.

  • March 28, 2005 28 Mar'05

    New switch targets data center aggregation

    Leveraging its success with Google and other high-profile customers, Force10 is launching a new 10 GigE data center aggregation switch that offers line rate switching at speeds up to 192 Gbps.

  • March 24, 2005 24 Mar'05

    Interoperability, thin APs to grow WLAN market

    A new IDC research report shows that the enterprise WLAN market was down marginally last quarter, but tight competition could mean more interoperability for customers.

  • March 21, 2005 21 Mar'05

    A better view of LAN awareness

    Visual Networks moves into the LAN market with its new suite of Ethernet appliances. With Visual's experience in sophisticated IT management issues and technologies, analysts say it has more than a chance to compete.