wide area networks for dummies

... can be configured for individual VCs • Can use different VCs for different types of traffic FRTS provides these capabilities: • Rate enforcement on a per-VC basis—the peak rate for outbound traffic ... queuing can be configured for individual VCs By defining separate VCs for different types of traffic and specifying queuing and an outbound traffic rate for each VC, bandwidth for each type of traffic ... No Support for FRF.12 Difference Between FRTS, DTS, and GTS Difference Between FRTS, DTS, and GTS Cisco has long provided support for forward explicit congestion notification (FECN) for DECnet

Ngày tải lên: 11/12/2013, 14:15

... expensive for large traffic volumes. 2. Due to large amount of control data the performance is low. Ch. 4 - WAN, Wide Area Networks 7 Frame Relay was originally conceived as a protocol for use ... 1 Ch. 4 - WAN, Wide Area Networks 1 X.25 - access 2 X.25 - connection 3 X.25 - packet format 4 X.25 - pros and cons 5 Frame Relay 6 Frame Relay - access 7 Frame Relay - frame format 8 Frame Relay ... its functionality and format. In particular, Frame Relay is a more streamlined protocol, facilitating higher performance and greater efficiency. Ch. 4 - WAN, Wide Area Networks 8 Normally Frame

Ngày tải lên: 19/10/2014, 09:06

... The Case for Virtual Local Area Networks (VLANs) 1-800-COURSES www.globalknowledge.com Expert Reference Series of White ... hub , networks became more crowded. A solution to the problem was necessary. Figur e 2. Hub-Based Twisted Pair Ethernet Ted Rohling, Global Knowledge Instructor, CISSP The Case for Virtual Local Area Networks ... Switch This also creates two IP networks or subnets. For traffic to flow between the two subnets, IP routing is required. This creates a logical separation between the networks. VLAN ports do not

Ngày tải lên: 17/01/2014, 06:20

... CONSIDERATIONS FOR STORAGE AREA NETWORKS Security Considerations for Storage Area Networks Colleen Rhodes East Carolina University Trang 2Abstract In this paper I will describe Storage Area Networks ... on how information is processed and stored Storage area network security is not only important for an organization looking out for their best interests, but it is also a responsibility for many ... securing a Storage Area Network by using best practices in setting up a SAN as well as securing the data on a day-to-day basis Trang 3Security Considerations for Storage Area Networks What is

Ngày tải lên: 14/02/2014, 16:20

... method for TXOP Exchange in wireless local area networks Takayuki Nishio1*, Ryoichi Shinkuma1, Tatsuro Takahashi1and Go Hasegawa2 Abstract We propose a TCP window-size delegation method for downlink ... TCP window size, TXOP Exchange, Wireless local area networks 1 Introduction In offices, homes, and public spaces, IEEE 802.11 wire-less local area networks (WLANs) has been extensively used to ... triple-duplicate ACKs for the provider and the client is almost twice as that for the other non-compliant STA Therefore, b should be set to(N0 ci − N0 pj )/2N0 ci 3.4 Adjusting algorithm forb We discussed

Ngày tải lên: 21/06/2014, 01:20

... Precise Clock Synchronization for Interconnected Body Area Networks David Sanchez Sanchez,1Luis Alonso,2Pantelis Angelidis,3and Christos Verikoukis4 1 Department of Information and Communication ... cited Secure time synchronization is a paramount service for wireless sensor networks (WSNs) constituted by multiple interconnected body area networks (BANs) We propose a novel approach to securely ... number of WSN nodes can range up to thousands of nodes Therefore, the WSN can occupy a huge area The WSN can be formed in public or hostile areas, where wireless communications can be easily eavesdropped,

Ngày tải lên: 21/06/2014, 05:20

... and by performing several runs The resulting performance is the maximum of the performance obtained in each runs The service graph is encoded for the GA as chromosome with| T |genes, one for every ... resources in urban sensing for new initiallyunforeseen applications [13], and similar transformationsmust not be excluded in the future Thus, the system mustallow for some flexibility in the ... pagesdoi:10.1155/2011/172831 Research Article Titan: An Enabling Framework for Activity-Aware “Pervasive Apps ” in Opportunistic Personal Area Networks Daniel Roggen,1Clemens Lombriser,1, 2Mirco Rossi,1and

Ngày tải lên: 21/06/2014, 07:20

... provided the original work is properly cited Ultrawideband (UWB) communication is a promising technology for wireless body area networks (BANs), especially for applications that require transmission ... concern for body area networks, as sampling frequencies of front-end sensors is typically less than 1 kHz For example, a heart reading using ECG requires at most 12 kbps or 12 b at 1 kHz However, for ... theorem, with an ultra-wide bandwidth, high data rate can be achieved with low transmitted power in UWB Power consumption is also a critical requirement for body area networks, as patients may

Ngày tải lên: 21/06/2014, 07:20

... wireless regional area networks (WRANs), wireless wide area networks (WWANs), wireless metropolitan area networks (WMANs), wireless local area networks (WLANs), and wireless personal area networks (WPANs) ... system goodput for the IEEE 802.11n networks In this paper, a frame-aggregated link adaptation (FALA) protocol is proposed to maximize the goodput perfor-mance for the IEEE 802.11n networks based ... standard has been used both for indoor and mobile communications The applications for WLANs include wireless home gateways, hotspots for commercial usages, and ad hoc networking for intervehicular communications

Ngày tải lên: 21/06/2014, 17:20

... distributed freely for any purposes (see copyright notice below). For information about publishing your research in EURASIP WCN go to http://jwcn.eurasipjournals.com/authors/instructions/ For information ... sends a long continuous preamble for communication as shown in Figure 11 It performs CCA before communication The average power consumption for preamble for B -MAC is calculated using ... implanted wireless sensor devices are hot research area. A specialized field called the body area networks (BAN) has emerged to support this area. Managing and controlling such a network is

Ngày tải lên: 21/06/2014, 17:20

... AWARE RF TRANSCEIVER FOR WIRELESS BODY AREA NETWORKS (WBAN) M.KUMARASAMY RAJA NATIONAL UNIVERSITY OF SINGAPORE 2011 Trang 2ENERGY AWARE RF TRANSCEIVER FOR WIRELESS BODY AREA NETWORKS (WBAN) ... Publications 109 BIBLIOGRAPHY 110 Trang 7SUMMARY Transceivers for wireless body area networks (WBAN) are expected to consume low power for long battery life or to operate from other limited power ... Characterizing PCB for the OOK transmitter Right side is for characterizing the test chip 1 and the left portion is for characterizing the rest of the two test chips Components are populated for only the

Ngày tải lên: 09/09/2015, 18:49

... Intrabody Communication System for Wireless Body Area Networks Zibo Cai College of Engineering and Science Victoria University Submitted in Fulfillment of the Requirements For the Degree of Master ... (PHY) and Medium Access Control (MAC) layers for WBAN The IEEE 802.15 Task Group 6 defines a MAC layer and a few supporting PHY layers for Body Area Networks (BAN) application in, on, or around ... which odulation (PP for binary da s a pulse in PPM system, its in OOKmbol is deter g L=4 PPM Fig.2.3 es for OOK a PTER 2 B mes could bpulse with no] For sho r consumptiothe informaPM) scheme ata

Ngày tải lên: 28/11/2015, 14:02

... thương Việt nam yếu tố quan trọng Giải pháp mạng WAN ( Wide Area Network - Mạng diện rộng ) áp dụng Chúng có nhiệm vụ kết hợp tất mạng LAN (Local Area Network ) xa lại thành mạng có đường truyền tốc ... THƯ VIỆN ĐIỆN TỬ TRỰC TUYẾN Tổng quan mạng WAN (Wide Area Network) – Phần mềm Cool Chat MỤC LỤC Lời giới thiệu Sơ đồ mạng WAN NHCT Việt Nam Các thiết

Ngày tải lên: 27/04/2013, 22:04

... wrote articles for various techie publications before moving to computer books in 1992. He’s writ- ten the Windows For Dummies series, Upgrading & Fixing PCs For Dummies, TiVo For Dummies, PCs: ... Dummies book for your business or organization, call 1-877- 409-4177, contact info@dummies.biz, or visit www.wiley.com/go/custompub. For information about licensing the For Dummies brand for products ... Trademarks: Wiley, the Wiley logo, For Dummies, the Dummies Man logo, A Reference for the Rest of Us!, The Dummies Way, Dummies Daily, The Fun and Easy Way, Dummies.com, Making Everything Easier,

Ngày tải lên: 03/08/2013, 14:10

... 1Personal Area Networks (PANs) 11.1 Introduction to PAN Technology and Applications 11.1.1 Historical Overview The concept of a Personal Area Network (PAN) differs from that of other types of datanetworks ... ability for easy and transparent informationexchange would be useful PANs aim to provide such ability in an efficient manner.There exist a number of different communication mediums to choose for implementing ... thePAN device Therefore, PAN devices should be compatible to enable information exchange in all cases Returning to the conference example, imagine two attendants wanting toexchange information, discovering

Ngày tải lên: 29/09/2013, 21:20

... technologies, in order to offer support for mobile computing applications, of perceived performance equal to those of wired communication networks Wireless Local Area Networks 271 WWW Resources ... WLAN operating area and with a little bit of luck eavesdrop on the information being exchanged. Nevertheless, for this scenario to take place, the potential intruder needs to Wireless Networks242 ... no provision for access to wired network Wireless Local Area Networks 243 Figure 9.4 WLAN topologies: ad hoc and infrastructure services that may be collocated in the geographical area in which

Ngày tải lên: 29/09/2013, 21:20

... little speakers built into their cases; desktop machines offer connectors for external audio equipment. (For more information about these connectors, see “Connect the Parts: Ports and Hubs,” ... conference calls. For some users, a microphone can serve as a replacement for, or an enhancement to, a keyboard as a way to enter text and commands. ➟ Video camera: Video cameras for computers, ... you’re willing to spend more for a high-end inkjet printer, you can get printing speeds of 20 pages per minute (or faster) for black and white and 10 to 30 seconds per page for color. In addition,

Ngày tải lên: 18/10/2013, 00:15

... specifying the name for the VLAN as "Engineering." Note: When typing in the names of VLANs, remember that name information is case sensitive 3 Create VLAN 3, specifying the name for the VLAN ... of the primary switch that you will use for the lab To successfully complete these sections, you must be able to alter the IP address configuration information on each of these PCs To complete ... Enter Selection: Set up the switches using the following configuration information: If you do not require step-by-step information on how to complete this process, then proceed to Section 1, "Configuring

Ngày tải lên: 19/10/2013, 02:15

... array of fields for the login form and echoes the fields for the form ➝75 Closes the <div> that contains the login form ➝77 Opens the <div> that contains the registration form ➝82 Begins ... allows you to format any string or number, including variable values The general format is $newvar = sprintf(“format”,$varname1,$varname2, ); where format gives instructions for the format and $varname ... offer a form for password changes ✓ Update information A member might move or change his phone number or e-mail address The application could provide a way for bers to change their own information

Ngày tải lên: 20/10/2013, 11:15