local area networks fiber distributed data interface ethernet and token ring
Tiểu luận môn Mạng Máy Tính Token Ring – IEEE 802.5 và Fiber Distributed Data Interface (FDDI)
Ngày tải lên :
31/10/2014, 22:03
... hoạt động • Định dạng Token Frame • Cơ chế thẻ ưu tiên • Xử lý lỗi mạng • Ưu nhược điểm mạng Token Ring • Fiber Distributed Data Interface (FDDI) Giới thiệu • Mạng Token Ring IBM phát triển từ ... Do đó, thuật ngữ Token Ring dùng cho mạng Token ring IBM phát triển chuẩn IEEE802.5 1 Giới thiệu • Mạng Token Ring truyền thống hoạt động tốc độ 4Mbps 16Mbps • Thế hệ Token Ring tốc độ 4Mbps ... dây thứ cấp sử dụng để đẩy tốc độ truyền mạng lên 200 Mbps 7 Fiber Distributed Data Interface (FDDI) So sánh Token Ring FDDI: Token Ring - Dùng cặp dây xoắn 4.16 Mbps Không xác định tính ổn đinh...
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Tài liệu Ethernet Signal Preservation In Factory-Terminated Patch Cords for Local Area Networks pptx
Ngày tải lên :
19/01/2014, 05:20
... 4: The square wave of an Ethernet signal is made of many different sine waves combined together The next important thing to understand is that Ethernet expects the size and shape of the square ... 800-775-KRONE No part of this document may be reproduced without permission Ethernet signals and patch cords We pointed out that an Ethernet square wave is made up of the sum of many sine waves If anything ... be reflected back toward the source “safe” for use in Ethernet systems These lengths are 4, 7, 10 The energy can be dissipated and lost and 15 feet, respectively Other lengths from to 20 feet...
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Tài liệu Ethernet Signal PreservationIn Factory-Terminated Patch Cords for Local Area Networks ppt
Ngày tải lên :
25/01/2014, 06:24
... 4: The square wave of an Ethernet signal is made of many different sine waves combined together The next important thing to understand is that Ethernet expects the size and shape of the square ... 800-775-KRONE No part of this document may be reproduced without permission Ethernet signals and patch cords We pointed out that an Ethernet square wave is made up of the sum of many sine waves If anything ... be reflected back toward the source “safe” for use in Ethernet systems These lengths are 4, 7, 10 The energy can be dissipated and lost and 15 feet, respectively Other lengths from to 20 feet...
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Wireless Local Area Networks
Ngày tải lên :
13/09/2012, 10:52
... router, Ethernet switch, and wireless access point – Also allows Internet and printer sharing WLAN Components • Minimal hardware needed for a WLAN – – – – Computer ISP Wireless network interface ... List the components and modes of a WLAN WLAN Applications • Wireless networks are increasing in popularity • Installing cabling is inconvenient and very expensive – Wireless networks solve this ... clients and an AP • Extended Service Set (ESS) – Two or more BSS wireless networks installed in same area – Provides users with uninterrupted mobile access to the network • All wireless clients and...
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Wireless Local Area Networks
Ngày tải lên :
29/09/2013, 21:20
... type of cabling and new buildings are designed by taking into account the need for data Figure 9.2 The ETSI HIPERLAN family of standards Wireless Local Area Networks 241 applications and are thus ... is 0.5 MHz (902 MHz band) or MHz (2.4 and 5.8 GHz bands) wide In the 902 MHz bands, 52 FH channels exist of which, of which 50 must be used In the middle band and upper bands, these channel numbers ... achieves peak data rates of C/10 and a FHSS one has a peak data rate that equals its subchannel’s bandwidth, while a narrowband WLAN can achieve a peak data rate of C HIPERLAN uses narrowband modulation...
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CCNA Layer 2 Switching - Virtual Local Area Networks Lab Scenario
Ngày tải lên :
19/10/2013, 02:15
... Ethernet ports 0/1 and Ethernet 0/2 to VLAN - Engineering To assign an Ethernet port membership in a VLAN, you must enter interface configuration mode Enter interface configuration mode for Ethernet ... command interface Ethernet 0/1 10 To assign Ethernet 0/1 to VLAN 2, issue the command vlan-membership static 11 Repeat this process, assigning ports to VLANs as follows: Ethernet 0/2 to VLAN Ethernet ... Cisco router's FastEthernet interface, create a subinterface for each VLAN to be routed For each subinterface, enable ISL encapsulation using the subinterface configuration command encapsulation...
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Tài liệu The Case for Virtual Local Area Networks (VLANs) ppt
Ngày tải lên :
17/01/2014, 06:20
... of Ethernet, the reasons VLANs were introduced, and the ways that VLANs can be used You will also learn about the networking standards that address the VLAN implementation Ethernet As a local area ... organization expanded, the departments moved into two separate buildings Accounting, Personnel, IT and the Executive Suite were in one Building A and Manufacturing, Shipping and Receiving and Inventory ... As a local area networking protocol, early Ethernet was inexpensive to install and operate when compared to competing protocols such as Token Ring and Arcnet It operated as a simple bus architecture...
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Báo cáo hóa học: " TCP-based window-size delegation method for TXOP Exchange in wireless local area networks" ppt
Ngày tải lên :
21/06/2014, 01:20
... Exchange for Cooperative Bandwith Allocation in Wireless Local Area Networks IEICE Technical Report, MoMuC2010-3, 13–18 (May 2010) T Nishio, R Shinkuma, T Takahashi, N Mandayam, A Coordination ... method for TXOP Exchange in wireless local area networks EURASIP Journal on Wireless Communications and Networking 2011 2011:58 Submit your manuscript to a journal and benefit from: Convenient online ... plays a role of as mentioned in Section 1, to handle the client’s informations, such as MAC and IP address, physical transmission rate, data frame size, and throughput requirement As discussed in...
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Báo cáo hóa học: " Research Article Frame-Aggregated Link Adaptation Protocol for Next Generation Wireless Local Area Networks" pot
Ngày tải lên :
21/06/2014, 17:20
... 3/4 5/6 Data rate (Mbps) 6.5 13.0 19.5 26.0 39.0 52.0 58.5 65.0 modes are utilized including BPSK, QPSK, and M-ary QAM For BPSK and QPSK with code rate Rc = 1/2 and 3/4 (i.e., mn = 1, 2, and as ... 802.11n standard, as shown in Table 1, three different modulation EURASIP Journal on Wireless Communications and Networking Table 1: Modulation and coding schemes of the IEEE 802.11n standard MCS ... MAC service data unit (A-MSDU) and the aggregate MAC protocol data unit (AMPDU), are exploited in the current IEEE 802.11n draft Performance comparisons between IEEE 802.11, 802.11e, and 802.11n...
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Báo cáo hóa học: " Research Article Achievable Throughput-Based MAC Layer Handoff in IEEE 802.11 Wireless Local Area Networks" pptx
Ngày tải lên :
21/06/2014, 23:20
... Communications and Networking Bandwidth (Mbps) Bandwidth (Mbps) 100 10−1 0.5 Rbusy 100 10−1 10−2 101 Bandwidth (Mbps) 101 101 10−2 (a) L = 500 B and n = 10−1 0.5 Rbusy 1 (c) L = 500 B and n = 10 ... experiment and simulation studies, and Section concludes this paper Related Work and Motivation The IEEE 802.11 MAC layer handoff procedure is split into trigger, discovery, AP selection, and commitment ... ratio is given by Rbusy = ((NACK + NDATA ) · Ts + (NDATA − NACK ) · Tc )/CP where NDATA − NACK denotes the number of unacked data which is retransmitted during the channel collision, Tc In addition,...
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Tài liệu LoopStar® 711 Leveraging a Full Suite of Ethernet and TDM Services to Cost-Effectively Utilize Fiber Networks doc
Ngày tải lên :
10/12/2013, 19:15
... 711 Fiber Extension LS 711 T-1 Ethernet T-1 Ethernet 100FX LS 711 T-1 Ethernet PBX 01/06 • The LoopStar 711 allows providers to leverage and extend their footprint by delivering Ethernet and ... Leveraging a Full Suite of Ethernet and TDM Services to Cost-Effectively Utilize Fiber Networks Ethernet and Legacy Services for True Convergence Providers of all sizes and types are worried about ... existing fiber connections w w w a d c c o m • + - - - 8 • - 0 - 6 - LoopStar® 711 Leveraging a Full Suite of Ethernet and TDM Services to Cost-Effectively Utilize Fiber Networks Specifications Data...
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Tài liệu Ethernet Access for Next Generation Metro and Wide Area Networks pptx
Ngày tải lên :
21/12/2013, 06:15
... 67 Reference Material 66 67 Ethernet Access for Next Generation Metro and Wide Area Networks OL-14760-01 iii Ethernet Access for Next Generation Metro and Wide Area Networks Introduction Scope ... Precedence) markings and bandwidth allocation Ethernet Access for Next Generation Metro and Wide Area Networks 34 OL-14760-01 Scalability Considerations The number of classes and the bandwidth allocation ... firewalls, and an encrypted tunnel to a campus location Ethernet Access for Next Generation Metro and Wide Area Networks OL-14760-01 Starting Assumptions • Outside WAN interface The CE UNI interface...
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wireless ad hoc networking personal-area, local-area, and the sensory-area networks
Ngày tải lên :
01/06/2014, 11:10
... Architectures, Protocols and Standards Yan Zhang, Jijun Luo and Honglin Hu ISBN: 0-8493-7399-9 Wireless Ad Hoc Networking: Personal -Area, Local- Area, and the Sensory -Area Networks Shih-Lin Wu and Yu-Chee ... trademarks, and are used only for identification and explanation without intent to infringe Library of Congress Cataloging‑in‑Publication Data Wireless ad hoc networking : personal area, local area, and ... networking—together with its key technologies and applications over the platforms—personalarea, sensory -area, and local- area networks in a single work The book contains three parts and each part has several self-contained...
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Báo cáo hóa học: " Research Article Interference-Aware Radio Resource Management for Local Area Wireless Networks" ppt
Ngày tải lên :
21/06/2014, 05:20
... an asynchronous network and in this case interference management capability would be limited We show that in the context of data intensive local area networks, emerging and next generation wireless ... attractive in high data- rate local area networks where the overhead is well justified since the achieved gains are higher The proposed scheme is capable of adapting the spectral reuse and resource allocations ... into subframes in time domain and into subbands in frequency domain A combination of a sub-frame and a subband is called a resource block (RB) All base stations (BS) and user equipment (UE) are...
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Distributed Data Gathering in MultiSink Sensor Networks with Correlated Sources
Ngày tải lên :
14/04/2015, 14:22
... algorithm is asynchronous, distributed, and supports large-scale sensor networks with multiple sink nodes Data gathering with correlated sources in sensor networks and resource allocation with ... Lifetime Data Gathering and Aggregation in Wireless Sensor Networks Computer Networks Journal (2002) 15 Krishnamachri, B., Estrin, D., Wicker, S.: Modelling Data- centric Routing in Wireless Sensor Networks ... Effect of Partially Correlated Data on Clustering in Wireless Sensor Networks In: Proc of the IEEE International Conference on Sensor and Ad hoc Communications and Networks (SECON) (2004) 14 Kalpakis,...
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Low Rate Wireless Personal Area Networks
Ngày tải lên :
13/09/2012, 10:52
... Objectives • Describe a wireless personal area network (WPAN) • List the different WPAN standards and their applications • Explain how IrDA, Bluetooth, and ZigBee work • Describe the security features ... – And ensures that the transmissions cannot be easily intercepted and decoded 17 Summary • The most common infrared connection today is based on the IrDA standard – IrDA devices cannot send and ... the basic hardware that controls the radio transmissions functions – Data bits (0 and 1) are converted into radio signals and transmitted • Radio module – – – – A single radio transmitter/receiver...
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High Rate Wireless Personal Area Networks
Ngày tải lên :
13/09/2012, 10:52
... WPAN Standards • IEEE is currently working on two standards – IEEE 802.15.3 and 802.15.5 • IEEE 802.15.3 standard – Defines the specifications for HR WPANs supporting speeds of 11, 22, 33, and up ... Objectives • Define a high rate wireless personal area network (HR WPAN) • List the different HR WPAN standards and their applications • Explain how WiMedia and UWB work • Outline the issues facing WPAN ... audio/visual applications and the other for data transfer applications • The lower two layers of the stack (MAC and PHY) – Are implemented in hardware • 802.15.3 PHY layer – Converts data bits into a...
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Wireless Metropolitan Area Networks
Ngày tải lên :
13/09/2012, 10:52
... between the customer’s premises and an ISP • Transmission techniques – Broadband and baseband • Land-based fixed broadband wireless techniques – Free space optics (FSO) – Local multipoint distribution ... limitations Frequency sharing Security Availability of the technology 17 IEEE 802.16 (WiMAX) • Standard for wireless broadband metropolitan area networks • 802.16 supports enhancements and extensions to ... Provide broadband access to rural and remote areas 19 WiMAX Applications (continued) • Applications (continued) – WiMAX CPE devices will support TV (video), telephone (voice), and data on the same...
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Describe wireless wide area networks (WWANs) and how they are used
Ngày tải lên :
13/09/2012, 10:52
... Kbps packet data transmission 16 Third Generation Cellular Telephony • Third Generation (3G) – Intended to be a uniform and global standard for cellular wireless communication • Standard data rates ... Wireless Application Protocol (WAP and WAP Version 2) • Wireless Application Protocol (WAP) and WAP2 – Provide a standard way to transmit, format, and display Internet data • For devices such as cell ... applications Connect to corporate networks Watch television or on-demand movies Take and transmit pictures and short movies Locate family members and employees using GPS Cellular Telephone Applications (continued)...
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