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:
How we tested the WLAN gear
Oct. 27, 2008
We assessed enterprise-grade 802.11n systems in terms of pure 802.11n throughput and latency; mixed-mode (802.11n plus both 802.11g and 802.11a clients) throughput and latency; "WiMix" traffic handling, which comprises ...
Siemens: Wins green competition
Oct. 27, 2008
Efficient power usage is the biggest differentiator between the Siemens HiPath and other enterprise 802.11n systems.
802.11n gear 10 times faster than current Wi-Fi offerings
Oct. 27, 2008
Instead, Network World set up the largest public 802.11n test ever conducted. We invited all enterprise Wi-Fi vendors to supply not one but eight 802.11n access points, along with controllers if needed.
Big players missing in action
Oct. 27, 2008
Almost as notable as the remarkable results in this test are some of the big names that didn't show up: Major WLAN vendors Aruba, Cisco and Trapeze all declined to participate in this project.
Vendors take different approaches to WLAN design
Oct. 27, 2008
Architecturally, we saw multiple approaches to wireless LAN design.
Throwing lots of traffic types into the WiMiX shows 11n gear adept at handling voice and ...
Oct. 27, 2008
While our single frame size throughput and latency tests are useful in describing system limits, they are not representative of what's actually seen on enterprise networks in everyday use.
Motorola: Novel architecture opens the door to WiMAX
Oct. 27, 2008
Motorola probably wishes we'd tested its AP-7131 just a few weeks later. We hit a few performance issues with the software image Motorola supplied, including one that prevented us from measuring throughput of short ...
Bluesocket: Best overall product
Oct. 27, 2008
Bluesocket's BlueSecure system is a good choice for enterprises looking to keep a lid on latency and jitter – both concerns with real-time voice and video.
Aerohive: Fast, but a little rough around the edges
Oct. 27, 2008
Like many relatively new products, Aerohive's HiveAP 340 showed both extreme promise and a few rough edges.
Cisco Nexus 7000 aims for data center dominance
Sep. 01, 2008
Building a big data center and looking for a switch to match? How do 256 10G Ethernet ports and nearly 1.7 terabits of capacity sound?
How we tested Cisco's switch
Sep. 01, 2008
We assessed the Cisco Nexus 7000 in six areas: high availability (HA) and resiliency; performance with layer-2 traffic, layer-3 IPv4 traffic, and IPv4 multicast traffic; features; and manageability and usability. A ...
Juniper switch proves to be credible choice
Jul. 14, 2008
Cisco take note: Juniper's new EX 4200 switch not only fills a hole in a leading competitor's product line, but also represents a credible alternative for enterprise access switching.
How we tested Juniper's switch
Jul. 14, 2008
We assessed Juniper's new enterprise switch using the same methodology we previously used to test other vendors' access switches. The one exception, as noted below, was in our use of IGMPv2 instead of IGMPv3 this time ...
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:
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- ...
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.
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
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 ...
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), ...
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 ...
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 ...
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 ...
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 ...
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 ...
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