David Newman
Internetworking equipment and security products
More about Newman's lab
Recent tests and articles
Network Test founder David Newman has been breaking computer networks for 20 years. Today he is a frequent speaker at industry conferences and an active participant in the IETF (Internet EngineeringTask Force). As a member of Network World's Lab Test Alliance, Newman has conducted numerous tests of network infrastructure and security devices. He also is the author of RFCs 2647 and 3511, the IETF specifications for firewall performance testing, as well as RFC 4814 on the contents of test traffic. Prior to founding Network Test, Newman served for nearly 10 years as director of lab testing for Data Communications magazine.
Newman is a graduate of the Johns Hopkins University and New York University.
Recent tests and articles by David Newman:
It's still early in the game for unified communications
Apr. 28, 2008
Unified communications offers the potential for anywhere, anytime connectivity between employees and the enterprise. But as the InteropLabs hotstage team found in piecing together more than a dozen commercial and open- ...
Unified communications: Is your network ready?
Apr. 28, 2008
Here are five questions for enterprise network managers to bear in mind when considering UC deployment:
Interop Labs: Network engineers focus on NAC, UC products
Apr. 28, 2008
In early April, in a drafty warehouse in Belmont, California, dozens of network engineers attempted to piece together hundreds of commercial and open source products as part of the 2008 Interop Labs initiative.
Most switches help in complying with secure management best practices
Mar. 24, 2008
In assessing switch management and security, we sought to answer three questions: Did devices follow current best practices by default? Could users configure switches to follow these best practices? And could switches ...
Features abound in latest and greatest access switch models
Mar. 24, 2008
While this test's key takeaway may be the big differences in new features, the good news is that, with a very few exceptions, all switches support the same basic L2/L3 functions
NAC/802.1X support in access switches is all over the map
Mar. 24, 2008
Many switches today support 802.1X authentication, a basic building block in NAC. The key question is what kind of access authenticated users can expect. In the six-test scenarios we developed for this project, we ...
Multicast performance differentiates access switches
Mar. 24, 2008
Once upon a time, layer-2 unicast performance tests would have produced by far the most important results, but that's changed. Measuring unicast throughput on all ports, once considered the acid test for access switches ...
Switch usability centers on CLI comfort zone
Mar. 24, 2008
Any assessment of switch usability is necessarily subjective. While there are some objective measures that can be applied (for example, it might take 17 steps to enable SSH on one switch, and only five on another), ...
Alcatel-Lucent wins green bragging rights in switch test
Mar. 24, 2008
With electric bills in large data centers topping $1 million per month, power consumption is a major concern. Using Fluke 322 and Fluke 335 clamp meters, we measured each switch's power draw, both when idle and again ...
How we tested the switches
Mar. 24, 2008
We assessed switches with 10 sets of tests covering L2 and L3 unicast performance; IGMP group multicast capacity; L2 and L3 multicast performance; NAC/802.1X; storm control; power consumption; switch manageability, ...
Breaking the standards
Mar. 24, 2008
In what's becoming something of a tradition in Network World tests, this project turned up design flaws in two standards: IEEE 802.1X authentication, which we tested in a NAC context, and IETF RFC 3918 covering ...
Cisco's virtual switch smashes throughput records
Jan. 03, 2008
Virtualization, long a hot topic for servers, has entered the networking realm. With the introduction of a new management blade for its Catalyst 6500 switches, Cisco can make two switches look like one while ...
How we tested Cisco's VSS
Jan. 03, 2008
We assessed VSS performance with three sets of tests measuring fabric bandwidth and delay, failover times, and unicast/multicast performance across a network backbone.
Review: 10Gig Ethernet access switch shootout
Mar. 24, 2008
Review: Who's got the fastest firewall?
Dec. 10, 2007
As a follow-up to Network World's previous rounds of baseline Unified Threat Management testing, we conducted a second high-speed test of only the firewalls shipping within the UTM boxes. These subsequent firewall tests ...
5 ways to turbocharge WAN applications
Sep. 27, 2007
The performance benefits from application acceleration are real — provided you understand what the technology can and can't do for your network.
WAN acceleration offers huge payoff
Aug. 13, 2007
After seven months of pounding on application-acceleration gear from Blue Coat, Cisco, Riverbed and Silver Peak, we can actually attest that these devices really work. With an average acceleration gain of 5 to 10 times ...
How we tested application-acceleration devices
Aug. 13, 2007
We tested application acceleration devices for performance, features, manageability and usability.
What About SSL?
Aug. 13, 2007
At first glance, encrypted Secure Sockets Layer traffic wouldn't seem like an obvious candidate for application acceleration, given its lack of compressibility and the invisibility of contents to optimization engines. ...
A buyer’s checklist for application acceleration
Aug. 13, 2007
Based on seven months of testing WAN-optimization products, Network World Lab Alliance Tester David Newman offers six tips on what to look for in a product that will boost enterprise application performance across the ...
Scaling and securing VoIP
May. 16, 2007
VoIP vendors say they deliver scalability and security. And InteropLabs (iLabs) testing mostly proved them right in multivendor settings. But testing also revealed some implementation gotchas in both of those areas, and ...
Breaking the standards
Nov. 06, 2006
We are used to breaking products in lab testing, but this time we broke 802.11 itself. Our tests uncovered a design flaw in the Wi-Fi protocol that affects performance testing, not just for current 802.11a/g products, ...
View from the Labs: Wi-Fi Scalability
Nov. 06, 2006
Keith Shaw talks with Network Lab Alliance member David Newman about his recent test of wireless gear including how it was tested, who came out on top and what flaw in the 802.11 standard was found.
A test of NAC appliance performance
Dec. 04, 2006
Line-rate performance may be a given in Layer-2/3 switches, but what about the NAC devices that sit alongside them? To find out, we loaded up the ConSentry and Nevis devices with the kind of Windows application traffic ...
How we conducted Wi-Fi scalability test
Nov. 06, 2006
The "enterprise" in "enterprise Wi-Fi scalability" implies a larger system than a handful of access points, each supporting a few clients. Accordingly, we asked each participating vendor to supply 25 access points, at ...
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