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802.11 Security: Defending the New Network Edge
White Papers There's no question that wireless LAN is getting more secure. The newly ratified 802.11i specification is going a long way towards answering the security concerns that have held back the adoption of 802.11 in the enterprise.
[February 14, 2006, 23:00]
802.11 - A Standard for the Present and Future
White Papers This paper describes IEEE 802.11 standard. The 802.11 family of specifications and 802.1X for authentication build on strong existing standards such as EAP, RADIUS, LDAP, and others to meet these needs.
[January 7, 2008, 4:02]
802.11 Wireless LAN White Paper
White Papers Wireless 802.11 specifies a 2.4 GHz operating frequency with data rates of 1 and 2 Mbps using either Direct Sequence Spread Spectrum (DSSS) or Frequency Hopping Spread Spectrum (FHSS). In 802.11 wireless LAN data is encoded using DSSS (Direct...
[November 25, 2003, 3:44]
802.11 DCF Denial of Service Vulnerabilities
White Papers This paper addresses Denial of Service vulnerabilities (DOS) in 802.11 wireless LANs that arise from the 802.11 Distributed Coordination Function (DCF). This paper demonstrates that the DCF is vulnerable to equivalent DOS attacks at both the MAC...
[October 18, 2008, 0:00]
802.11 Wireless LAN Security and the Cisco SWAN Program
White Papers Most people are now well aware of the opportunities 802.11 Wireless LAN (WLAN) networks bring. The advantages start with convenience (which does shade into higher productivity as well). Saving on wiring costs and speed of deployment are two other...
[October 1, 2008, 1:01]
Comparison of Modified Dual Queue and EDCA for VoIP Over IEEE 802.11 WLAN
White Papers The popular IEEE 802.11 WLAN today does not provide any Quality-of-Service (QoS) because of its contention-based channel access nature of the Medium Access Control (MAC). Therefore, this paper proposes a simple software upgrade-based solution...
[December 20, 2007, 0:01]
Link-Layer Fragmentation and Retransmission Impact on TCP Performance in 802.11-Based Networks
White Papers The objective of this paper is to examine the behavior of TCP in 802.11-based networks. The focus of this work is mainly on the effect of the fragmentation and frames retransmission handled at the MAC layer on the TCP end-to-end performance.
[December 20, 2007, 0:01]
LAN-Express IEEE 802.11 PCI Adapter
Downloads This package supports the following driver models:LAN-Express IEEE 802.11 PCI Adapter
[November 14, 2002, 7:00]
Protecting Transmissions When Using Power Control on 802.11 Ad Hoc Networks
White Papers This paper presents the ALCA (Asymmetric Link Collision Avoidance) protocol. ALCA was designed to deal with a known deficiency of the Basic Scheme Gomez et al.for power control in 802.11 ad hoc networks, which occurs when links become asymmetrical...
[August 23, 2007, 1:00]
The Effects of Adjacent Channel Rejection and Adjacent Channel Interference on 802.11 WLAN Performance
White Papers The escalating deployment of wireless networking technology as well as other wireless technologies in the same unlicensed spectrum is rapidly increasing the radio frequency (RF) interference for Wi-Fi (802.11) products, threatening the data...
[November 30, 2003, 21:36]
On the Performance of IEEE 802.11 Under Jamming
White Papers This paper studies the performance of the IEEE 802.11 MAC protocol under a range of jammers that covers both channel-oblivious and channel-aware jamming. The paper studies two channel-oblivious jammers: a periodic jammer that jams deterministically...
[August 23, 2007, 1:00]
Wireless Virtualization on Commodity 802.11 Hardware
White Papers This paper describes specific challenges in virtualizating a wireless network and multiple strategies to address them. Among different possible wireless virtualization strategies, the current work in this domain is focussed on a Time-Division...
[March 1, 2008, 0:02]
A Survey of MAC Protocols for Ad Hoc Networks and IEEE 802.11
White Papers This paper explains limitations of the IEEE 802.11 standard and most of the typical problems in ad hoc networks where the standard is applied. There have been many possible solutions and observations proposed in many papers.
[July 9, 2007, 23:23]
Improving IEEE 802.11 Wireless Networks With Microsoft Windows XP Service Pack 2
White Papers This webcast provides an overview of the Microsoft implementation of IEEE 802.11 wireless local area network (LAN) networking in Microsoft Windows XP Service Pack 1 (SP1). It also presents design modifications that improve the Windows wireless LAN...
[March 3, 2005, 23:00]
Enhancements of the IEEE 802.11, a MAC Protocol for Ad Hoc Network With History of Power Adjustment
White Papers This paper proposes a MAC protocol which improves disadvantages of the IEEE 802.11 DCF standard, like the blocking problem, scheduling concurrent transmissions (the hidden and exposed problem). The protocol also achieves better spatial reuse of the...
[March 25, 2008, 8:57]
Updates to Deploying Secure 802.11 Wireless Networks With Microsoft Windows
White Papers This white paper contains updates for changes in IEEE 802.11 standards and their implementation in Microsoft Windows XP, Windows Server 2003, and Windows 2000. The changes in 802.11 standards and its implementation in Windows XP, Windows Server...
[May 19, 2006, 1:00]
New Insights From a Fixed Point Analysis of Single Cell IEEE 802.11 WLANs
White Papers This paper studies a fixed point formalisation of the well known analysis of Bianchi. It provides a significant simplification and generalisation of the analysis. In this more general framework, the fixed point solution and performance measures...
[May 24, 2006, 0:00]
IEEE 802.11 Rate Adaptation: A Practical Approach
White Papers Today, three different PHYsical (PHY) layers for the IEEE 802.11 WLAN are available (802.11a/b/g); they all provide multi-rate capabilities. To achieve a high performance under varying conditions, these devices need to adapt their transmission rate...
[May 24, 2006, 1:00]
Introduction to IEEE 802.11
White Papers In 1997 the IEEE adopted IEEE Std.the first wireless LAN (WLAN) standard. This standard defines the media access control (MAC) and physical (PHY) layers for a LAN with wireless connectivity. It addresses local area networking where the connected...
[July 19, 2003, 0:00]
A Survey of QoS Enhancements for IEEE 802.11 Wireless LAN
White Papers Quality-of-Service (QoS) is a key problem of today's IP networks. In wireless environments, bandwidth is scarce and channel conditions are time-varying and sometimes highly lossy. Although IEEE 802.11 Wireless LAN (WLAN) is the most widely used...
[May 24, 2006, 1:00]
