The OSI Model
- May 05, 2011
Deciding when and how to convert IPv4 to IPv6, service providers face numerous technical and business issues; find out what matters most in this Q&A.
- April 28, 2011
With virtual appliances, enterprises can move network services from dedicated network appliance hardware into the virtual environment.
- April 13, 2011
In his series offering Cisco ASA firewall advice, Fast Packet blogger Brandon Carroll explains the new Cisco ASA 8.4 feature, Stateful Failover with Dynamic Routing Protocols.
- March 30, 2011
Virtualization can be effective and easy to deploy, but that's sort of the problem. Fast Packet blogger Josh Stephens explains how this simplicity can lead to virtual machine sprawl.
- March 09, 2011
Asked multiple times at the Cisco Partner Summit last week what the channel and users should do about the fact that Cisco switches are more expensive than the competition, Cisco execs basically ...
- February 22, 2011
It’s hard enough to grapple with disaster recovery in a physical environment, but when it comes to virtual servers, virtualization backup and recovery become even more difficult. Fast Packet blogger Josh Stephens tells you how to handle ...
- February 16, 2011
With its new network security architecture, SecureX, Cisco tries to transcend next-generation firewall hype by focusing on more than application awareness. It's all about the context of who, what, where, when and how network connections are ...
- February 10, 2011
Server admins swear by long-distance vMotion and the ability to move applications dynamically across data centers, but this only results in traffic trombones and lots of other network nightmares. Fast Packet blogger Ivan Pepelnjak explains why.
- February 04, 2011
When a large school system launched a Web-facing student information server, its IT organization deployed its first hardware load balancers within its data center network.
- January 28, 2011
Is TRILL a "terrible idea?" Does Shortest Path Bridging rule? I have no clue. TRILL (Transparent Interonnection of Lots of Links) and 802.1aq (AKA Shortest Path Bridging or SPB) are very similar ...
- January 27, 2011
Wireless IPS has traditionally policed Wi-Fi frequencies for wireless LAN security threats, such as rogue and misconfigured access points, but many enterprises need these products to look beyond Wi-Fi into interfering activity from cellular networks...
- January 26, 2011
Before you throw more hardware at preventing latency, try improving 10 Gigabit Ethernet performance by fine tuning what you already have. Fast Packet blogger Michael J. Martin explains how.
- January 11, 2011
If you run into BGP peering problems because of a Cisco ASA or PIX firewallin the middle, there are a few simple command line fixes that will quickly solve the problem. Fast Packet blogger Brandon Carroll explains.
- December 01, 2010
The rapid rise of enterprise guest wireless networks and public Wi-Fi hotspots are only leading to anti-social behavior and a host of WLAN security problems that include identity snooping using Firesheep. Opening up guest networks and public Wi-Fi ...
- November 03, 2010
40 GbE will make its way into data center networks as enterprises adopt large numbers of racks with 10 GbE server connectivity. 10 Gigabit servers will drive up port density and eventually force enterprises to take the 40 GbE plunge.
- October 28, 2010
Even after most major carriers launch 4G networks based on Long-Term Evolution (LTE), service providers are still going to have to support subscribers on 2G/3G legacy networks for years to come.
- October 26, 2010
Network security hardware and software vendors are offering enterprises options to consolidate network security infrastructure so that they can reduce management overhead and power consumption in the data center. But enterprises must avoid adding ...
- October 07, 2010
Cisco's Borderless Networks strategy promises customers a new paradigm for supporting enterprise mobility and ensuring mobile network security. However, network engineers are struggling to understand how a seemingly disparate collection of products ...
- October 06, 2010
VDI performance problems can plague global deployments, thanks to latency. But WAN optimization, QoS and WAN monitoring tools can help VDI over the WAN.
- September 23, 2010
Application-aware firewalls enhance network security by offering deeper visibility, but enterprises will hang on to old-style firewalls.
- September 17, 2010
Forrester Research Inc. is proposing a new mantra for IT security. In his report "No More Chewy Centers: Introducing the Zero Trust Model of Information Network Security," Forrester analyst John ...
- September 09, 2010
Replacing its WAN with a private fiber optic ring network, the city of Alexandria, La, laid the foundation for a Wi-Fi-based wireless mesh network and improved its security and compliance posture.
- August 27, 2010
Virtual Private LAN Service (VPLS) enables multipoint-to-multipoint communication over carrier-based MPLS/IP networks, basically enabling enterprises to extend LAN segments over long distances. In ...
- August 18, 2010
A crackdown on Facebook and IM usage revealed a gaping WAN security hole for one enterprise. Users had been swapping corporate data via peer-to-peer (P2P) file-sharing sites, leading its WAN pros to block P2P traffic and redirect users to the ...
- August 11, 2010
The crew of ABC's Extreme Makeover: Home Edition built a new Wi-Fi network with outdoor wireless access points. It travels with them across the country.
- June 23, 2010
CCIE recertification can be onerous for high-level engineers who no longer have hands-on technology roles. Cisco's CCIE Emeritus program offers these veterans the opportunity to stay connected to the program without having to obtain CCIE ...
- June 22, 2010
40 and 100 Gigabit Ethernet ratification means that vendors can roll out standardized 40 and 100 GbE switching products with enormous speed, but users are likely to hold off until prices come down and the need for performance is greater.
- June 17, 2010
The Transparent Interconnection of Lots of Links (TRILL) protocol is a pending IETF standard that could eliminate spanning tree protocol from standard data center network design. Vendors like Brocade are already staking their future on it.
- June 16, 2010
Enterprise network management software vendors are retooling their products for service delivery management. Service assurance products from NetScout, CA and others are combining network management with other IT management tools to give enterprises ...
- June 03, 2010
Server virtualization has forced network vendors to reinvent the data center network. Everyone has his own vision of how to deliver a network that is optimized for virtual data centers. Enterprises should think twice about just going with their ...
- May 27, 2010
Braindumps, testkings, proxy testers and collusion -- the methods that people use to cheat on network certification exams hurt the reputation of Cisco certifications and other vendor training programs. But networking pros who put in the necessary ...
- May 11, 2010
Industrial wireless outdoor mesh will increase in importance as enterprises look for ways to wirelessly connect carpeted offices to far-flung industrial locations. The Aruba-Azalea Networks acquisition could help companies that have struggled with ...
- May 05, 2010
Although the PCI DSS wireless guidelines released last year sought to dispel any confusion about wireless LAN security risks, enterprises are still neglecting security requirements and falling prey to old WLAN wives' tales. Hiding SSIDs isn't enough.
- April 28, 2010
Data center network architecture is heading for a reckoning, according to vendors at Interop. During a panel session dubbed "Why the Network Must Fundamentally Change," vendors like Cisco, Juniper and HP predicted a data center with a flat Layer 2 ...
- April 13, 2010
The FCoE data center offers enterprises the opportunity to converge data and storage traffic on a single network infrastructure. Most experts see data center network convergence as an opportunity to reduce cost and complexity within servers and ...
- March 31, 2010
Vendors have been slow to deliver next-generation firewalls, but Gartner's Magic Quadrant for enterprise firewalls says that is about to change. Enterprises need an intelligent firewall that has IPS capabilities and application visibility.
- March 31, 2010
Company CTO and founder Dr. David Hughes shares the story behind Silver Peak WAN acceleration products in this interview with SearchEnterpriseWAN.com. If you want to learn how Silver Peak differs from the rest of the WAN optimization market, read ...
- March 16, 2010
The physical appearance of wireless LAN access points is becoming more important for enterprises. Meru Networks has launched a new family of subtle and compact access points with internal antennas, which will allow at least one hotel to adopt voice ...
- March 04, 2010
A growing airport reinvented its network troubleshooting methodology and approach to IP address management by scrapping a network management product that wasn't working out and replacing it with SolarWinds' Orion product suite.
- February 03, 2010
Users are breaking their silence about widespread but illicit use of Cisco IOS emulators without software licenses in home labs now that Cisco Systems' latest version of its operating system, IOS 15, threatens to crack down on them.
- December 18, 2009
The Avaya-Nortel acquisition was one of the more notable top networking stories of 2009, marking the end of a legacy player and a questionable beginning for Avaya as it struggles with whether to integrate the Nortel data networking portfolio.
- December 16, 2009
Deploying a group of Palo Alto next-generation firewalls allowed IDT Corp. to decommission dozens of weak legacy firewalls and simplify WAN security management.
- December 02, 2009
CableOrganizer.com asked me to review a few products as part of a data theft prevention promotion they were advertising. One such appliance was a USB port block. You may be wondering why you would ...
- November 19, 2009
Enterprises with extremely high uptime requirements for their data center networks will spend the extra money on out-of-band network management. The New York Stock Exhange (NYSE Euronext) has built a Force10 network to manage its Juniper production ...
- October 29, 2009
Next-generation firewalls are getting plenty of hype, but not many vendors have completely solved the firewall architecture challenges involved in combining firewalls with IPS and other network security functions.
- September 24, 2009
The number of devices in enterprise networks is growing, but the size of the network engineering teams is not. Engineers need to turn to network automation, standardization and network management outsourcing to keep on top of things.
- September 23, 2009
With 802.11n ratification and a higher volume of sales, wireless LAN prices are about to drop. Aruba Networks is first to market with its new low-cost AP-105 access point, but others are sure to follow.
- June 10, 2009
Firewall vendor Palo Alto Networks has added quality of service and traffic shaping capabilities to its firewall operating system. The new features transform the notion of the traditional firewall into a WAN management technology.
- May 20, 2009
Aruba Networks announced this morning that it will now offer lifetime warranties on all its indoor wireless LAN access points. This will provide some nice investment protection to customers. It's ...
- May 13, 2009
Aruba Networks introduces Virtual Branch Network, a portfolio of remote networking products that gives teleworkers and small branch offices secure and simple access to the corporate network.
- April 30, 2009
Aruba Networks emails me quite often with wireless LAN customer wins. Either it is signing more customers than other WLAN vendors, or it simply publicizes its wins more often. Usually I don't ...
- March 12, 2009
With this first entry in a new series about network problem users, SearchNetworking.com looks at the Internet Novice. Though well-meaning, Internet novices can pose a significant threat to the corporate network. Education and smart policies can ...
- March 11, 2009
Ruckus Wireless introduced beamforming to 802.11n wireless LAN, taking aim at the RF management techniques of Cisco and other rivals.
- February 18, 2009
WAN optimization and acceleration appliances, notably Riverbed's Steelhead appliances, can now accelerate SSL encrypted traffic, ensuring secure travel across the WAN.
- February 10, 2009
When Station Casinos built its newest property, Aliante Hotel & Casino, a new computing model for slot machines forced the company to deploy a network that was 10 times bigger than anything it had built before. Find out how it was done and how the ...
- February 05, 2009
A new appliance from Packet Design gives enterprises visibility into their service providers' MPLS networks. With MPLS WAN Explorer, companies can make sure that providers are delivering proper service levels and the right network architecture
- January 22, 2009
WAN optimization heavyweight Riverbed Technology gobbled up Mazu Networks this week for just $25 million in cash. Mazu is a privately held company that sells network behavior analysis (NBA) tools ...
- September 30, 2008
Christmas is coming a little early this year (don't you hate how it creeps up on you?) for Aruba customers. The WLAN equipment company announced the availability of their Adaptive Radio Management ...
- June 24, 2008
In this Q&A, Nicholas Doggett offers his advice on how organizations can better plan, design and implement their wireless networks and learn what pitfalls they should avoid.
- June 05, 2008
Distributed antenna systems can help simplify wireless deployments, particularly for those charged with managing multiple systems.
- May 05, 2008
Aruba Networks is one of the top WLAN infrastructure vendors in the market. The last time I checked, they were second to the titan in the market, Cisco. A lot of vendors see the coming generation ...
- November 13, 2007
Proper revenue assurance can help limit the amount of money lost to faulty billing systems, redundantly provided services and fraud.
- November 08, 2007
Core network services, like DNS and DHCP, are critical for network and applications performance, but many companies are still taking an ad hoc approach.
- November 01, 2007
Mobile TV rollouts continue moving forward with the major service providers, despite some daunting challenges.
- October 23, 2007
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 ...
- August 28, 2007
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
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
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 10, 2007
Fiber optic networks require security measures to ward off fiber taps and intrusions.
- June 06, 2007
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.
- January 03, 2007
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.
- October 11, 2006
Remote workers are wreaking havoc on their networks. A recent study commissioned by Cisco found that teleworkers are putting security at risk.
- October 10, 2005
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 14, 2004
The vendors are enhancing end-point security to help their joint customers keep networks virus-free, but one expert says only Cisco shops running Tivoli can benefit.
- October 12, 2004
Marrying wireless LAN and VoIP technology isn't easy, but one expert says that with enough effort and expertise, they can live a long, happy life together. However, one admin isn't so sure.
- July 13, 2004
Test your security knowledge by having some fun with this word search and enter our contest for your chance to win a free security book.
- June 16, 2004
Because your cyberdefenses are bound to be compromised eventually, your security strategy must include processes and technologies to contain the damage.
- February 17, 2004
Cisco catches up to the industry by supporting the IEEE's 802.3af power over Ethernet standard in several of its Catalyst switch lines, paving the way for a new generation of cheaper, more advanced PoE-enabled gear.
- October 22, 2003
A firewall is a set of related programs, located at a network gateway server, that protects the resources of a private network from users from other networks. (The term also implies the security policy that is used with the programs.) An enterprise ...
- August 26, 2003
Learn about protocol negotiation in Microsoft's The large installed base of CIFS (Common Internet Filesharing System) protocol suite.
- August 20, 2003
This chapter describes the common types of network media, including twisted-pair cable, coaxial cable, fiber-optic cable, and wireless.
- June 06, 2003
This chapter excerpt explains the layers of the OSI model, switching, TCP, UDP, and VRRP.
- March 21, 2003
This chapter excerpt focuses on quality of service (QoS) in traffic engineering, specifically covering the DiffServ architecture and interaction, EXP for packet forwarding, the Modular QoS CLI, and the emerging DiffServ-Aware Traffic Engineering ...
- January 08, 2003
In this article on IPv6 addressing, learn about address types, address prefixes, special addresses and more.
- December 19, 2002
An overview of what's new in IPv6 with Silvia Hagen, author of IPv6 Essentials.
- September 16, 2002
The Internet has quickly exceeded expectations, and IPv4, which was released in 1980, is creaking. This article from IT-Director.com explains the problems, and looks toward IPv6 and the benefits it offers.
- August 21, 2002
Security is the Achilles' heel of wireless local are networks, but also one of its best opportunities.
- May 07, 2002
HyperTransport adds networking extensions
- April 17, 2001 17 Apr'01