lans mans and wans continued

... Authentication and Authorization in WLANs Chapter Authentication in WLANs: An Overview 2.1 Introduction 2.2 Basic Entities and Requirements in WLANs 2.2.1 Entities and Functions in a LAN and WLAN 2.2.2 ... in Wireless LANs and MANs Thomas Hardjono Lakshminath R Dondeti artechhouse.com Library of Congress Cataloging-in-Publication Data Hardjono, Thomas Security in wireless LANs and MANs / Thomas ... and then in wireless MANs This book discusses the security threats and requirements in wireless LANs and wireless MANs, with a discussion on what the original designs missed and how they were corrected...

Ngày tải lên: 25/03/2014, 12:07

... T Mansour and A Vainshtein Restricted permutations, continued fractions, and Chebyshev polynomials Electron J Combin., 7(1):#R17, 2000 [13] T Mansour and A Vainshtein Layered restrictions and ... techniques of Bandlow and Killpatrick [2] and Bandlow, Egge, and Killpatrick [1] to compute this bijection directly To define our bijection, we first need to introduce some notation For all n ≥ and all ... Claesson, and E Steingr´ a e ımsson Catalan continued fractions and increasing subsequences in permutations Discrete Math., 258:275–287, 2002 [5] T Chow and J West Forbidden subsequences and Chebyshev...

Ngày tải lên: 07/08/2014, 07:21

... the sexes and age groups (inter- Page of action period and age, p = 0.7; interaction period and sex, p = 0.2) HTLV-1 and HIV incidence by retroviral status In total, data from 835 men and 1512 ... Aids 2008, 22:1195-1202 Mansson F, Biague A, da Silva ZJ, Dias F, Nilsson LA, Andersson S, Fenyo EM, Norrgren H: Prevalence and incidence of HIV-1 and HIV-2 before, during and after a civil war ... [25,27], 1996-1998 [49] and 2006-2007 [26] These surveys are referred to as 1990, 1997 and 2007 In 1991 a cohort of HIV-positive cases and HIV-negative controls (matched by sex, age and area of living)...

Ngày tải lên: 13/08/2014, 01:20

... frequency bands Ì each station assigned fixed frequency band Ì unused transmission time in frequency bands go idle Ì example: 6-station LAN, 1,3,4 have pkt, frequency frequency bands bands 2,5,6 ... 5.5 Ethernet Ì 5.6 Hubs and switches Ì 5.7 PPP Ì 5.8 Link Virtualization: ATM and MPLS 5: DataLink Layer 5-3 Link Layer: Introduction Some terminology: “link” Ì hosts and routers are nodes Ì ... Link Layer Ì 5.1 Introduction and Ì Ì Ì Ì services 5.2 Error detection and correction 5.3Multiple access protocols 5.4 Link-Layer Addressing 5.5 Ethernet Ì 5.6 Hubs and switches Ì 5.7 PPP Ì 5.8...

Ngày tải lên: 12/09/2012, 15:06

... WAN physical layer WAN serial connections Routers and serial connections Routers and ISDN BRI connections Routers and DSL connections Routers and cable connections Setting up console connections ... wall DSL works over standard telephone lines using pins and on a standard RJ-11 connector PS… Low-pass filter (or splitter) is needed for telephone 7/19/2008 41 Routers and cable connections ... wires are grounded and are called “ring” (R1 through R4) Tip and ring are terms that originated in the early days of the telephone Today, these terms refer to the positive and the negative wire...

Ngày tải lên: 22/10/2013, 16:41

... Environment and Wireless LANs 22 Spreading and De-spreading DSSS 10 KHz bandwidth chip rate (BW) chip rate (BW) fc Transmission 10 KHz bandwidth fc Reception Baseband Information Bits Coding and Interleaving ... Spread Spectrum Wireless Environment and Wireless LANs Agenda (2) ● Wireless networks ■ Mobile wireless WANs ■ Fixed wireless WANs ■ WLANs: the 802.11 family ■ WLANs/WPANs: Bluetooth ● IEEE 802.11 ... Wireless Environment and Wireless LANs fc Interference from users within the same cell 23 Wireless Networks ● Mobile wireless WANs ● Fixed wireless WANs ● WLANs: the 802.11 family ● WLANs/WPANs: Bluetooth...

Ngày tải lên: 29/10/2013, 06:15

... system of connected LANs and its graph representation 15.15 Figure 15.9 Finding the shortest paths and the spanning tree in a system of bridges 15.16 Figure 15.10 Forwarding and blocking ports ... algorithm 15.17 Figure 15.11 Routers connecting independent LANs and WANs 15.18 15-2 BACKBONE NETWORKS A backbone network allows several LANs to be connected In a backbone network, no station is ... backbone; the stations are part of a LAN, and the backbone connects the LANs Topics discussed in this section: Bus Backbone Star Backbone Connecting Remote LANs 15.19 Note In a bus backbone, the...

Ngày tải lên: 16/02/2014, 20:20

... and WLANs 29 Wi-Fi Setup Chapter 5: LANs and WLANs 30 SECTION Using LANs D LAN Advantages and Challenges Sharing Files Sharing Printers LAN Parties Troubleshooting Chapter 5: LANs and WLANs ... switch Network router RJ45 connector Chapter 5: LANs and WLANs 17 Ethernet Setup Chapter 5: LANs and WLANs 18 Ethernet Setup Chapter 5: LANs and WLANs 19 Ethernet Setup The Network Connection ... boosts signals, or routes data to its destination Chapter 5: LANs and WLANs Network Devices Chapter 5: LANs and WLANs 5 Clients, Servers, and Peers  Network devices can function as clients or as...

Ngày tải lên: 06/03/2014, 09:21

... system using TDMA and FDMA 16.10 Figure 16.7 GSM bands 16.11 Figure 16.8 GSM 16.12 Figure 16.9 Multiframe components 16.13 Note GSM is a digital cellular phone system using TDMA and FDMA 16.14 Figure ... analog cellular phone system using FDMA 16.5 Figure 16.3 Cellular bands for AMPS 16.6 Figure 16.4 AMPS reverse communication band 16.7 Figure 16.5 Second-generation cellular phone systems 16.8 ... two moving units, called mobile stations (MSs), or between one mobile unit and one stationary unit, often called a land unit Topics discussed in this section: Frequency-Reuse Principle Transmitting...

Ngày tải lên: 06/03/2014, 12:20

... different, and none of mythology’s pantheon of mighty men are are quite so human as Odysseus and Telemachus Odysseus is known for being wise and clever He is loved and respected as a friend, husband, ... the end of twenty long years of waiting, and she is not certain her husband is alive Over one hundred handsome young men are clamoring for her attention, and she sometimes appears to be at her ... responsibilities of a host were much more than what is demanded by our contemporary culture This helps us understand the lavish treatment of Telemachus and Odysseus during their respective travels It also...

Ngày tải lên: 14/03/2014, 09:30

... and WLANs 29 Wi-Fi Setup Chapter 5: LANs and WLANs 30 SECTION Using LANs D LAN Advantages and Challenges Sharing Files Sharing Printers LAN Parties Troubleshooting Chapter 5: LANs and WLANs ... switch Network router RJ45 connector Chapter 5: LANs and WLANs 17 Ethernet Setup Chapter 5: LANs and WLANs 18 Ethernet Setup Chapter 5: LANs and WLANs 19 Ethernet Setup The Network Connection ... boosts signals, or routes data to its destination Chapter 5: LANs and WLANs Network Devices Chapter 5: LANs and WLANs 5 Clients, Servers, and Peers  Network devices can function as clients or as...

Ngày tải lên: 23/03/2014, 00:20

... (Dambeanu 1997) The So 1994 and Tooley 2003 studies were excluded because patients received non-random administration of surfactant and were then randomized to rapid extubation or continued mechanical ... PaO2 = 50 and PaCO2 = 52 (study data) Data represent mean value and standard deviation (sd) Risk of bias Early surfactant administration with brief ventilation vs selective surfactant and continued ... Harrington and RF Soll updated the search strategy TP Stevens and EW Harrington excerpted data from studies and drafted the revised review M Blennow and RF Soll checked data from identified studies and...

Ngày tải lên: 24/03/2014, 05:20

... www.cisco.com ICND v1.0a—1-30 Routers and serial connections Serial implemetation of DCE and DTE © 2000, Cisco Systems, Inc www.cisco.com ICND v1.0a—1-31 Routers and serial connections Back-to-back ... Inc www.cisco.com ICND v1.0a—1-5 Ethernet media and connector requirements © 2000, Cisco Systems, Inc www.cisco.com ICND v1.0a—1-6 Ethernet media and connector requirements © 2000, Cisco Systems, ... Systems, Inc www.cisco.com ICND v1.0a—1-32 Routers and serial connections Fixed interface © 2000, Cisco Systems, Inc www.cisco.com ICND v1.0a—1-33 Routers and serial connections Modular serial port interfaces...

Ngày tải lên: 23/05/2014, 10:16

... Waikato, New Zealand John Thompson, University of Waikato, New Zealand Stefan J Boddie, University of Waikato, New Zealand Ian H Witten, University of Waikato, New Zealand Section IV: Use and Impact ... Digital Library Development History and Landscape (2) Design Architecture and Systems (3) Implementation Issues and Challenges (4) Use and Impact (5) Users and Usability (6) Future Trends of Digital ... libraries and reviews existing standards, tools and related research topics The authors discuss advanced digital library services and highlight new challenges in metadata harvesting, search and retrieval...

Ngày tải lên: 01/06/2014, 00:46

Ngày tải lên: 12/06/2014, 11:34

... management of the City, federal and state awarding agencies and pass-through entities and the Auditor General of the State of Florida, and is not intended to be and should not be used by anyone ... management of the City, federal and state awarding agencies and pass-through entities and the Auditor General of the State of Florida, and is not intended to be and should not be used by anyone ... That Could Have A Direct and Material Effect on Each Major Federal Program and State Project and on Internal Control over Compliance in Accordance with OMB Circular A-133 and Chapter 10.550, Rules...

Ngày tải lên: 19/06/2014, 11:20

... monitoring with all the applicable rules and citations for HCD programs and/ or agreement and must ensure that program funds are used in accordance with all program rules and regulations, determine the ... determines program and financial performance and regulatory compliance and is completed in one (1) or more of the following four (4) stages: Desk Audit Compliance Review of records and files On-site ... Control Over Financial Reporting and on Compliance and Other Matters Based on an Audit of Financial Statements Performed in Accordance with Government Auditing Standards, and Independent Auditors’ Report...

Ngày tải lên: 19/06/2014, 11:20

... physical layer parameters and can be applied to all IEEE 802.11 PHY standards The parameters used in both the analytical model and our simulations follow the parameters in [6, 7] and are summarized ... standard for wireless LAN medium access control (MAC) and physical Layer (PHY) specification: higherspeed physical layer extension in the 2.4 GHz band,” IEEE 802.11b, 1999 [4] IEEE, “Ieee standard ... International Conference on Cybernetics and Information Technologies, Systems and Applications (CITSA 2005) Mr Chatzimisios is a Student Member of IEEE and IEE, and a Professional Member of ACM A...

Ngày tải lên: 23/06/2014, 00:20

... new applications and adaptations  Transport – congestion and flow control  Network – addressing and routing  Link – media access and handoff  Physical – transmission errors and interference ... ICPWC'02 26 802.11-based Wireless LANs Architecture and Physical Layer IEEE 802.11  Wireless LAN standard defined in the unlicensed spectrum (2.4 GHz and GHz U-NII bands) λ 12cm 33cm 26 MHz 902 MHz ... GHz 5.35 GHz  Standards covers the MAC sublayer and PHY layers  Three different physical layers in the 2.4 GHz band – FHSS, DSSS and IR  OFDM based Phys layer in the GHz band (802.11a) IIT...

Ngày tải lên: 31/07/2014, 11:20