A Ruckus Over WLAN Testing
A competitive review of WLAN products at Syracuse University stirred up controversy because of a vendor’s involvement in the tests. But the real question is, are they testing the right things?
Data Centers: Get 'Em Hotter and Wetter
Data centers can run hotter and with more humidity than traditionally thought, according to a recent report from The Green Grid. This will reduce energy consumption and cut operating costs, but long-held myths might stand in the way.
OpenStack: An Overview
OpenStack is a continually evolving initiative to enable the deployment of cloud computing services using open source software. We’ll examine the most recent release of the platform, called Folsom, which adds two new modules for networking and block storage.
Why We Need Network Abstraction
Highly virtualized data centers are exposing cracks in traditional network constructs such as VLANs. New approaches that abstract the physical network, including network overlays, are key to providing flexibility and scale.
802.11ac: 5 Steps to Prepare for Next-Gen WLANs
The 802.11ac wireless standard will be ratified in 2013, and pre-standard consumer hardware is on the market. Follow these five steps to prepare now for the day when 802.11ac comes knocking.
Holiday Gift Guide
It's the time of the season to make a list and check it twice. We've assembled a holiday wish list for work and play, including tools to improve your mobile life, gaming gadgets, and tablet alternatives for those who already have, or don't want, an Apple in their stockings.
Few Enterprises Move At The Speed Of Social
Part of the challenge of social business is matching speeds between enterprises and organizations like Facebook with a "move fast and break things" philosophy, says Hearsay Social CTO Steve Garrity.
Dear Cisco, Please Don't Screw Up Meraki
Cisco’s $1.2 billion acquisition of competing WLAN vendor Meraki has me worried that Meraki’s top-notch tech support and customer responsiveness will get lost inside Cisco’s big-network culture.
Wireless for Beginners Part 3: Getting the Signal
WLAN radio signals can be affected by a variety of factors, including encoding algorithms, physical obstacles and interference. This post outlines common problems that can affect signal performance.
SDN Is Business, OpenFlow Is Technology
Software-defined networking (SDN) and OpenFlow aren’t the same thing. We’ll clarify the technical differences and discuss a more important distinction: SDN emphasizes applications that drive network usability and business requirements, while OpenFlow is a technology to link an SDN controller and network devices.
Packets Are the Past, Flows Are the Future
Networking has focused for years on speeds and feeds: how many packets you can handle and how many ports per device. But hosts and applications work with flows, which will force the network to adapt. Here’s why.
Xirrus Adds Application Control To WLAN Arrays
Xirrus will add deep packet inspection to its wireless arrays to let administrators prioritize, block or limit bandwidth based on specific applications. Xirrus’ claim to be the first WLAN vendor to do so don’t ring true, but it’s still a good idea.
Big Switch's OpenFlow Controller Guns for SDN Leadership
Big Switch Networks, an ambitious start up in software-defined networking (SDN), has launched a new controller and a pair of networking applications that have the potential to drive OpenFlow-based networks into the mainstream.
3 Virtual LAN Tips For SMBs
Virtual LANs aren't just for large organizations with multiple departments. Consider these three scenarios for how they might benefit smaller office environments.
HP EVI vs. Cisco OTV: A Technical Look
HP's Ethernet Virtual Interconnect (EVI) connects data centers at Layer 2 to support virtual machine mobility between data centers. We'll see how it stacks up to VPLS and Cisco's OTV.
Business Is Losing The App Usability Battle
Traditional business applications don’t fare well compared to consumer options. Is it time for companies to focus more on the user experience and less on application performance?
Skype In The Workspace: 3 Key Facts
Microsoft's popular Skype videoconferencing service officially goes social with a professional network for SMBs. Here's what you need to know.
HP Upgrades Mobile Thin Clients
HP adds bigger displays and more processing power to its notebook-like mt40 mobile thin client, as well as the ability to image wirelessly.
Storage Hypervisors Vs. Software Defined Storage
New technologies are emerging to streamline storage environments. Whether you call those technologies storage virtualization, storage hypervisors or software defined storage, IT still has to be persuaded to embrace them.
What WAN Optimization Can Teach SDN About Tunneling
Network tunnels used to have a bad reputation, but the rise of software-defined networking (SDN) and network virtualization is changing that. WAN optimization, which uses tunnels, may offer insights that IT can apply to SDN.
Wireless for Beginners Part 2: Avoiding Collisions
Wireless networks must avoid collisions to ensure packets reach their destination. This post reviews CSMA/CA and RTS/CTS techniques that let wireless devices share common airspace without disrupting traffic.
How To Speak Data Center: kWh to BTUs
IT professionals who want proper power and cooling for their gear need to be comfortable with terms and calculations used by data center facilities pros. Lesson two: how to convert units of power into units of energy.