News

Networking and communication

August 16, 2007 16 Aug'07
Voice over IPv6: Architectures for Next Generation VoIP Networks

VoIP technolgies are not immune to system failures, from hacking to jitter, and these issues can present problems for companies who depend on their network. This chapter examines some of the issues that are faced by VoIP systems, focusing on those ...
August 15, 2007 15 Aug'07
VoIP models and services: Complete guide

With clear, concise explanations of existing VoIP business models and deployment methodologies, this guide will enable you to weigh the pros and cons of each based on your needs.
August 14, 2007 14 Aug'07
QoS -- What voice managers need to know

Quality of Service (QoS) technologies can be quite confusing between technical complexities and marketing jargon. In this tip, find out what voice managers need to know about QoS as it relates to VoIP.
August 14, 2007 14 Aug'07
Novell to acquire Senforce for endpoint security

Novell is acquiring Senforce, an early network access control supplier, to integrate its endpoint security features and develop an endpoint management suite.

August 13, 2007 13 Aug'07
Fibre-optic networks: Access network design

Fibre-optic technology in access networks is expanding due to the demand for broadband. Learn about FTTX and passive optical networking (PON) systems.
August 12, 2007 12 Aug'07
Implementing video on demand

Video on demand (VoD), in at least some of its potential service models, is perhaps the most challenging of all network applications. Implementation of VoD should be should be undertaken in three particular steps.
August 12, 2007 12 Aug'07
IPv6 from 'CCNA Portable Command Guide', Chapter 25

IPv6, 'CCNA Portable Command Guide,' Chapter 25, explains IPv6 address assignment, static routes in IPv6, IPv6 ping, IPv6 tunnels and RIPng. Learn all you need to know to pass the IPv6 questions on your Cisco Certified Network Associate exam.
August 09, 2007 09 Aug'07
NAS appliance purchase considerations

NAS appliances are frequently touted for bringing convenience and simplicity to network storage. Appliances include their own dedicated disks for storage and RAID, and most NAS appliances can be upgraded with more or larger disks for additional ...
August 09, 2007 09 Aug'07
Network navigation -- Chapter 6 of 'Microsoft Windows Vista Administration'

Microsoft introduced a new way to view and navigate a network with Windows Vista. This chapter from 'Microsoft Windows Vista Administration' examines such new network navigation tools as Network Map and Network Details. If you have several networks ...
August 09, 2007 09 Aug'07
VoIP vulnerability threatens data

VoIP vulnerabilities have now reached a level of sophistication that allows hackers to steal, view or delete data.

August 09, 2007 09 Aug'07
Network navigation -- Chapter 6 of 'Microsoft Windows Vista Administration'

Microsoft introduced a new way to view and navigate a network with Windows Vista. This chapter from 'Microsoft Windows Vista Administration' examines such new network navigation tools as Network Map and Network Details. If you have several networks ...
August 08, 2007 08 Aug'07
NAS appliance specifications

NAS appliances are noted for their convenience, offering dedicated internal storage that is relatively straightforward to identify and manage. The biggest issue for NAS appliances is avoiding network bottlenecks and supporting expansion without ...
August 08, 2007 08 Aug'07
Wi-Fi simplicity edging out Wi-Fi security

Experts say the standards are available to lock down Wi-Fi, but many network and security managers are taking an easier approach.
August 08, 2007 08 Aug'07
WLANs require investment to yield benefits, study says

WLANs require strong investments in order to yield their benefits, according to a recent study by the Aberdeen Group.
August 08, 2007 08 Aug'07
IP address depletion hastens IPv6 adoption

IPv4 IP address depletion is hastening the need to switch from IPv4 to IPv6. In this column, Loki Jorgenson explains where we are now in terms of IPv6 readiness and provides some insight on how much work network operators will face.
August 08, 2007 08 Aug'07
WLANs require investment to yield benefits, study says

WLANs require strong investments in order to yield their benefits, according to a recent study by the Aberdeen Group.
August 07, 2007 07 Aug'07
Application-aware storage promises intelligence and automation

Storage professionals overbuy both performance and capacity in an effort to forestall potential storage problems. Tiered storage was one way to address this problem -- matching storage resources and costs with the value of data. Today, storage is ...
August 06, 2007 06 Aug'07
Video networks: The fundamental structure

Video delivery, content network, IPTV, triple play -- these are just a few of the terms used today for video over broadband data networks. This concept of video networks is an increasing challenge, and like most network challenges, this one is ...
August 06, 2007 06 Aug'07
F5 buys Acopia for US$210M

F5 joins the storage market with the acquisition of file virtualisation switch company Acopia.
August 05, 2007 05 Aug'07
Windows Vista, IPv6 lead to network performance problems

Windows Vista, which runs on parallel IPv6 and IPv4 protocol stacks, can create network performance problems when used with older routers.
August 05, 2007 05 Aug'07
Understanding IMS (IP Multimedia Subsystem)

IMS (IP Multimedia Subsystem) is an emerging architectural framework, based on SIP and IP, for offering multimedia and VoIP services, as well as fixed mobile convergence. This tip explains exactly what the architecture behind IMS.
August 01, 2007 01 Aug'07
Black Hat 2007: VoIP security reaches tipping point

VoIP security is as bad today as it was a couple years ago, industry experts say. But PGP creator Phil Zimmermann thinks his new Zfone software will help turn the tide.
August 01, 2007 01 Aug'07
Cisco knocks out Avaya as IP PBX heavyweight

IP PBX adoption is rising as Cisco and Avaya square off for market dominance.
August 01, 2007 01 Aug'07
Black Hat 2007 preview: Blue Pill under scrutiny

Among the highlights at the year's most anticipated hacker event, vulnerability researchers will challenge Joanna Rutkowska's Blue Pill concept. They'll also pick apart flaws in VoIP, NAC and Web applications.
July 31, 2007 31 Jul'07
VoIP services spell trouble for telcos

The rise of VoIP is paving the way for companies that haven't traditionally sold voice services to do so. Telcos slow to move will be hard pressed to keep up
July 29, 2007 29 Jul'07
VoIP services spell trouble for telcos

The rise of VoIP is paving the way for companies that haven't traditionally sold voice services to do so. Risk-adverse telcos slow to move in this rapidly changing environment will be hard pressed to keep up with more agile competitors.
July 26, 2007 26 Jul'07
Justifying VoIP deployment without cost-analysis

VoIP and unified communications deployments remain sluggish, as network managers look for ways to justify the cost of the infrastructure and system upgrades. Non-financial return on investment (ROI) metrics can be used as a way to augment the ...
July 25, 2007 25 Jul'07
VoIP solution centre answers users' questions

A new VoIP performance management solution center on Fluke Networks' Web site helps IT professionals to answer some of their VoIP network questions.
July 25, 2007 25 Jul'07
EMC reports Clariion surge, data archiving slump

EMC's revenues are up this quarter, attributed in part to a big boost in Clariion sales, but CEO Joe Tucci is critical of the company's execution in data archiving.
July 25, 2007 25 Jul'07
Cisco issues warning for wireless LAN controller flaws

Cisco Systems is warning customers of flaws in its wireless LAN controllers that initially crippled a wireless network at Duke University.
July 23, 2007 23 Jul'07
LeftHand refreshes iSCSI SAN software

Version 7.0 of LeftHand's iSCSI SAN software contains dozens of new features, including support for four-way replication and brushed-up thin provisioning.
July 23, 2007 23 Jul'07
NAC growth sluggish as companies consider network security options

Companies are taking a wait-and-see approach, hoping the technology's maturity will make it more cost effective.
July 22, 2007 22 Jul'07
Black Hat Las Vegas 2007: Special news coverage

SearchSecurity.com covers all the controversy at this year's show with news, features, podcasts, interviews, exploits and more direct from Las Vegas.
July 19, 2007 19 Jul'07
VoIP performance testing fundamentals

This guide discusses why it is important to run regular VoIP network performance testing and some of the ways it can be done.
July 19, 2007 19 Jul'07
Wireless interference can be frustrating (and fun?)

Since Wi-Fi operates in unlicensed bands, the enterprise wireless spectrum can be shared by other, seemingly innocuous devices like Bluetooth and wireless game controllers. But interference from such devices, or from having too many devices on one ...
July 18, 2007 18 Jul'07
For Boeing, data security, network access still hazy

Boeing is trying to reshape its network security architecture to better protect sensitive systems from threats without degrading employee productivity.
July 17, 2007 17 Jul'07
Unified communications infrastructure threats and defense strategies

Unified communications systems promise exciting productivity gains for workers and cost savings for businesses, but many often underestimate the security threats facing them. John Burke outlines the threats facing unified communications and how to ...
July 17, 2007 17 Jul'07
Branch offices get security, services boost

Juniper Networks released a handful of new branch office offerings, including two new services routers, two secure services platforms and two network management appliances.
July 10, 2007 10 Jul'07
Updating a QoS strategy for VoIP traffic

Learn how to update your QoS strategy for VoIP traffic in this tip from Tom Lancaster.
July 09, 2007 09 Jul'07
Unified messaging system updates company's voicemail

Installing a new unified messaging system helped one company in its daily struggles with an outdated voicemail system.
July 04, 2007 04 Jul'07
Cisco users upbeat about security direction

Cisco customers say the vendor's security strategy is headed in the right direction, which is why they believe the networking giant's IronPort integration will be smooth sailing.
July 01, 2007 01 Jul'07
VoIP measurement boosts customer service efficiency

iSelect Technology Manager Jason Egbers says the company's new VoIP measurement tools have helped it improve contact center operations.
June 28, 2007 28 Jun'07
SIP fundamentals

Session Initiation Protocol (SIP) will allow true interoperability, eventually enabling every IP-based device and application to communicate seamlessly with one another. This guide discusses some of the basics of SIP, including vulnerabilities, ...
June 27, 2007 27 Jun'07
Instant messaging usage increase highlights need for policies

Instant messaging is a valuable business tool for some enterprises. For others, it's a security risk. Either way, a recent Burton Group report suggests that all companies should have an IM usage policy, even if they haven't deployed IM yet.
June 25, 2007 25 Jun'07
Instant messaging usage increase highlights need for policies

A Burton Group report suggests that all companies should have an IM usage policy, even if they haven't deployed IM yet
June 25, 2007 25 Jun'07
Meet Mr. Asterisk

Adam Turner meets the creator of the Asterisk open source IP PBX and explores the future of the software, which is making major enterprise inroads.
June 24, 2007 24 Jun'07
Gigabit Ethernet and 10 Gigabit Ethernet: Technology overview

This overview of Gigabit Ethernet and 10G lays the foundation for understanding Gigabit Ethernet technology and the advantages it brings to your network.
June 24, 2007 24 Jun'07
VoIP performance testing fundamentals

VoIP network performance testing can mean the difference between a VoIP system working at a high level QoS and a weak system that runs so poorly customers could take their business elsewhere. This guide discusses why it is important to run regular ...
June 21, 2007 21 Jun'07
HP users mull blade storage

HP's "blade everything" strategy is starting to emerge in storage. Users at the HP Technology Forum this week mulled the possibilities for the technology.
June 19, 2007 19 Jun'07
Securing the enterprise VoIP perimeter

How to make VoIP work without sacrificing firewalls or network perimeter security.