troubleshooting and maintaining wireless networks

... ArticleRobust and Scalable Transmission of Arbitrary 3D Models over Wireless Networks Irene Cheng, 1, 2 Lihang Ying, 2 Kostas Daniilidis, 1 and Anup Basu 2 1 Department of Computer and Information ... discuss novel strategies for wireless network management, including QoS provisioning, hybrid channel allocation, and database and location management schemes for wireless networks possibility of optimizing ... important features adds an overhead on bandwidth limited connections, in particular on wireless and mobile networks Without the between compression rate and robustness to packet loss For example,...

Ngày tải lên: 22/06/2014, 00:20

... what wireless networking is about,including a briefing on rules and regulations, safety and interfer-ence, and how antennas and cables play in the wireless world, it istime to describe the bits and ... 802.11b bandwidth This also gives you more security and con-trol over access into and through the bridge Back-Wireless Gateways and Routers Most of us started out with a wired network and migrated ... some typical wireless networks After the basics are laidout we will cover each of these in their own chapters, and includetypical software and security configurations Wireless at Home Wireless networking...

Ngày tải lên: 10/08/2014, 12:21

... available WEP keys 0, 1, 2, and 3,while most wireless devices number them 1, 2, 3, and 4 (equivalent toWindows’ 0, 1, 2, and 3, respectively) LinkSys wireless devices andWindows support entering ... into the accesspoint and all of your clients Table 7.1 provides a handy worksheet to make note of the defaultvalues that come preset in your access point and wireless cards, andyour customized ... your accesspoint and have to reset it to factory default values and start over Westill live in an age where “plug-and-play” is not a 100 percent reality,and many USB devices and Windows operating...

Ngày tải lên: 10/08/2014, 12:21

... files, decipher and edit obscure and esoteric configura-tion file parameters, learn C and shell scripting to be able to readand extract salient bits of command parameters, and do so over andover again ... survey and analyze wireless networks and securityare not equally available on all platforms The two most notableapplications for hacking or determining wireless network securitylevels—AirSnort and ... between computers and networks.The results are about a dozen programs, most of them for Linuxsystems, that can help us see, and to some extent understand, what is happening in the wireless networking...

Ngày tải lên: 10/08/2014, 12:21

... processing unit (CPU) and numeric processor using fixedaddressing and interrupt request (IRQ) 13 ■ Clock and timer resources using fixed addresses and IRQs 0 and 8 ■ Memory and device addressing ... is true even for plug-and-play/universal serial bus (USB) devices—although the rules andresults of plug-and-play and auto-configuration seem quite out oforder, random, and illogical in some cases ... of work behind the scenesand makes it easy to deal with WLAN security and access issues ISS: Wireless Scanner While you can control access to and through your WLAN, and you cansee which devices...

Ngày tải lên: 10/08/2014, 12:21

... Trang 5and Macs to obtain IP addressing, routing, and DNS informationautomatically so that you do not have to configure each and everyworkstation (Using DHCP is the default value for most PC and ... workstations and devices as necessary and verify thatthey work at accessing the Internet, that network printers can beused, servers and file shares can be accessed, etc Then begin addingyour wireless ... arenow ready to install and test a wireless client Figure 13.12 The Security dialog for the WAP11, allowing you to set the encryption level and WEP key passphrases. Installing Wireless Clients The...

Ngày tải lên: 10/08/2014, 12:21

... pin pairs 1 and 2 and 3 and 6 are necessary Pin pairs 4 and 5 (blue/white), and 7 and 8 (brown/white) are available for other uses These are the pins... let it flow, and then remove ... point and client systems. Check your wireless equipment vendor’s Web site for information about firmware or driver updates. Upcoming Standards and Trends 277 802.1x—A Security Standard for All Networks ... the current and future demands of radio spectrum use, leading to possible changes in who uses what parts of the spectrum and how. Upcoming Standards and Trends 273 Data networking over wireless...

Ngày tải lên: 10/08/2014, 12:21

... GHz band. ■ 802.11h—A future standard for wireless spectrum management. ■ 802.11i—A standard for enhancing the security of wireless local area networks (WLANs) Preceded by an interim nonstandard ... ting wireless to work on my Linux system, thanks to files and helpfrom AbsoluteValue Systems and the wlan-ng’contributions, I hadthe pleasure of trying AirSnort, NoCat, and Sputnik successfully andfound ... 18Tardis—Tardis 2000 and K9I love Tardis What else can I say For years this program has beenkeeping a variety of servers and workstations on-time and in-synchwith the National Institutes of Standards and Testing’s...

Ngày tải lên: 10/08/2014, 12:21

... Internal command—A command that loads with and is available as part of the DOS command processor program, COMMAND.COM DIR, Trang 10COPY, DEL, TYPE, and CLS are examples of some internal DOS mands Internal ... much as 32 MB ofexpanded memory Expanded memory manager (EMM)—The term often given to the software or that refers to expanded memory chips and cards See also expanded memory. Expanded memory specification ... can be loaded into some programs and DOS Extended memory specification (XMS)—A standard that defines access and control over upper, high, and extended memory on 286and higher computer systems XMS...

Ngày tải lên: 10/08/2014, 12:21

... Withouther understanding and encouragement, this work would not have come to fruition Trang 31.1 Cognitive Radio Networks 2 1.2 Cooperative Networks 3 1.3 Uncertainty models and Imperfect-CSI ... wireless communication physical signals in cognitive radio and cooper-ative wireless networks, it is also applicable to both radio and sound waves, and is of great importance in other fields like radar, ... the processing of the relay node, relay networks aredivided into three major categories: Compress and forward (CF), Amplify andforward (AF) and Decode and forward (DF) In these categories different...

Ngày tải lên: 10/09/2015, 15:50

... improving the privacy and security of tire pres-sure monitoring systems and other forthcoming in-car wireless sensor networks 1 Introduction The quest for increased safety and efficiency of au-tomotive ... reverse en-gineering and GNU Radio programming to understand and reproduce the attack The equipment used (the VTEQ VT55 and USRP attached with TVRX) is openly available and costs $1500 at current ... seskar}@winlab.rutgers.edu Abstract Wireless networks are being integrated into the modern automobile The security and privacy implications of such in-car networks, however, have are not well...

Ngày tải lên: 23/03/2014, 10:20

... Ad-Hoc Networks J.Lipman, P.Boustead, and J Chicharo A Presence System for Autonomous Networks A.Dang, and B.Landfeld Secure Routing Protocols for Mobile Ad-Hoc Wireless Networks A.A.Pirzada, and ... Eijk, M.S.Bargh, and J.Brok Trang 7H.Duong, A.Dadej, and S.GordonHandover Channel Allocation Based on Mobility Predictions A.Jayasuriya Mobility Prediction Schemes in Wireless Ad Hoc Networks PART ... ADVANCED NETWORKS Q.Fu, and J.Indulska Performance Analysis of Reliable Multicast Protocols: A Based Approach Message-J.Tovirac, W.Zhang, and S.Perreau Fair Queuing in Active and Programmable Networks...

Ngày tải lên: 18/04/2014, 11:24

... within the transmission range, and therefore secure communication is also of importance In this paper, we focus on wireless networks with energy and secrecy constraints and investigate some transmission ... nodes and relay deployment in wireless networks,” IEEE Journal on Selected Areas in Communications, vol 25, no 2, pp 306–317, 2007. [8] L Simi´c, S M Berber, and K W Sowerby, “Partner choice and ... Kramer, and N B Mandayam, “Dedicated-relay vs user cooperation in time-duplexed multiaccess networks,” IEEE Transactions on Wireless Communications In press. [15] P Youssef-Massaad, L Zheng, and...

Ngày tải lên: 21/06/2014, 05:20

... position to a new position by selecting a random direction and a random speed The node randomly and uni-formly selects its new directionθ(t) from (0, 2π] and speed v(t) from (0, Vmax] During the ... the node randomly and uniformly chooses a direction and moves along that direction until it reaches a boundary After reaching the boundary and stopping for someTpause, it randomly and uniformly ... random mobility models, Random Walk (RW) [5] and Random Direction Mobility (RDM) [3], on the performance of the Bypass-AODV routing protocol In these two models, users move individually in random...

Ngày tải lên: 21/06/2014, 11:20

... caching benefits in multihop wireless networks [8 10] In the caching-enhanced multihop wireless networks, single wireless node usually has limited space for caching and can only save part of streaming ... September 2008 [10] F Xie and K A Hua, “A caching-based video-on-demand ser-vice in wireless relay networks,” in Proceedings of International Conference on Wireless Communications and Signal Processing ... O Ruwase, and D G Andersen, “Ditto: a system for opportunistic caching in multi-hop wireless networks,” in Proceedings of the 14th Annual International Conference on Mobile Computing and Networking...

Ngày tải lên: 21/06/2014, 17:20

... experienced in wireless networks Fluctuations in network resource avail-ability, due to channel fading, variable error rate, mobility, and handoff, make QoS provisioning more complex in wireless networks ... moment and always guaranteeing a good PQoS value 2 RELATED WORK AND LITERATURE Most of the proposed solutions [8 10] for QoS guarantee in wireless networks follow a proxy-based approach, and rely ... Shah, K Chen, and K Nahrstedt, “Dynamic bandwidth management for single-hop ad hoc wireless networks,” in Pro-ceedings of the 1st IEEE International Conference on Pervasive Computing and Communications...

Ngày tải lên: 21/06/2014, 22:20

... Article On Multipath Routing in Multihop Wireless Networks: Security, Performance, and Their Tradeoff Lin Chen and Jean Leneutre Department of Computer Science and Networking, LTCI-UMR 5141 laboratory, ... risk and packet delivery ratio, which gives the theoretical limit on the security-performance tradeoff of node-disjoint multipath routing in multihop wireless networks Copyright © 2009 L Chen and ... paths to increase the fault tolerance and the resilience to attackers However, how to choose the secure and reliable paths among expo-nentially many candidates and how to allocate traffic among them...

Ngày tải lên: 21/06/2014, 23:20

... Journal on Wireless Communications and NetworkingVolume 2009, Article ID 251314, 17 pages doi:10.1155/2009/251314 Research Article On Coverage and Capacity for Disaster Area Wireless Networks Using ... very high computational complexity related work on disaster area networks, mobility model, and base station placement in wireless networks is summarized In Section 3, we describe the mobility model ... 2.1 Disaster Area Wireless Network Recently, many kinds of wireless networks have been proposed to be applied to disaster area relief operations In [3], Hiroaki et al propose and evaluate a mobile...

Ngày tải lên: 21/06/2014, 23:20

... plotted graphsand emphasizing various deviations between current andreference versions and improvements or deteriorations ofresults The ATE was build in 2000 and since then, it runsnightly and whenever ... literature), and F-score count the number of TP, FP, and FN They are used in small variation for many different tasks and will thus occur many more times in this paper For clarity and reference, the standard ... (shadow contrast levels) and handling of split andmerge situations (split metric and merge metric) 4.3.1 Chosen segmentation measure subset Due to the enormous costs and expenditure of time to...

Ngày tải lên: 22/06/2014, 00:20

... Neighborhood and Community Wireless Networks Sharing Your SOHO WLAN Open Community Wireless Networks Wireless ISPs Portal Software Summary Chapter 15 Upcoming Standards and Trends Using Radios and Resources ... Installing, Troubleshooting, and Repairing Wireless Networks This page intentionally left blank Installing, Troubleshooting, and Repairing Wireless Networks Jim Aspinwall McGraw-Hill ... Chapter xv Wireless Essentials Wireless Defined Wireless Equals Infrared Wireless Equals Radio Frequencies Wireless Networking Radio Spectrum Summary Chapter Wireless Network Criteria and Expectations...

Ngày tải lên: 10/08/2014, 12:21