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wide area networks ppt

Describe wireless wide area networks (WWANs) and how they are used

Describe wireless wide area networks (WWANs) and how they are used

Kĩ thuật Viễn thông

... 8-PSK–CDMA2000 1xRTT•Operates on two 1.25 MHz -wide frequency channels•Supports 144 Kbps packet data transmission2Objectives•Describe wireless wide area networks (WWANs) and how they are used•Describe ... pager, satellite telephone, and location services41Summary•In cellular telephone networks, the coverage area is divided into sections called cells•Cellular technology generations–First ... Mbps for a stationary user•3G network technologies–CDMA2000 1xEVDO•For 2.5G CDMA2000 1xRTT networks 25Binary Runtime Environment for Wireless (BREW)•BREW is a thin software environment–Very...
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Tài liệu Wide Area Networks doc

Tài liệu Wide Area Networks doc

Quản trị mạng

... 31© 2000, Cisco Systems, Inc. www.cisco.comKeep All Graphics Inside This Boxecon_0481_09_010 .ppt QoS ReviewQoS ReviewIP TrafficVoIP HTTP FTPPackets are:Marked (colored) at ingress at network ... 49© 2000, Cisco Systems, Inc. www.cisco.comKeep All Graphics Inside This Boxecon_0481_09_010 .ppt PQ-WFQ (IP RTP Priority)PQ-WFQ (IP RTP Priority)WFQInterface3 33 32 24 3 2 1 1VV4 44 ... 30© 2000, Cisco Systems, Inc. www.cisco.comKeep All Graphics Inside This Boxecon_0481_09_010 .ppt Application TrafficApplication TrafficApp Tier 1 Tier 2 Tier 3 Tier 4MarketData256 kbpsper...
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Tài liệu Enterprise Data Center Wide Area Application Services (WAAS) Design Guide pptx

Tài liệu Enterprise Data Center Wide Area Application Services (WAAS) Design Guide pptx

Quản trị mạng

... 95134-1706 USAEnterprise Data Center Wide Area Application Services (WAAS) Design GuideThis document offers guidelines and best practices for implementing Wide Area Application Services (WAAS) ... TrafficServer to Client TrafficWAE FarmVLAN 28VLAN 2959867 31Enterprise Data Center Wide Area Application Services (WAAS) Design GuideOL-12934-01 Design and Implementation DetailsFor ... %LINK-5-CHANGED: Interface Loopback0, changed state to administratively down 45Enterprise Data Center Wide Area Application Services (WAAS) Design GuideOL-12934-01 Implementation DetailsNote that the...
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Tài liệu Chapter11 Wide Area Networking Protocols pptx

Tài liệu Chapter11 Wide Area Networking Protocols pptx

Chứng chỉ quốc tế

... s0/0 Chapter11 Wide Area Networking Protocols Introduction to Wide Area Networks WAN 是覆盖地理范围相对较为广阔的数据通信网络,它一般是利用公共载体(比如电信公司)提供的设备进行传输.WAN 技术运行在 OSI 的最下 3 层 广域网 (Wide Area Network,WAN)的一些术语 ... Mode,ATM):国际电信联盟电信标准委员会(ITU-T)制定的信元(cell)中继续标准.ATM 使用固定长度的 53 字节长的信元方式进行传输,ATM 网络的面向连接的 Cabling the Wide Area Network Cisco 的串行连接支持几乎所有类型的 WAN 服务.HDLC,PPP 和帧中继使用相同的物理层定义的接口,但是和 ISDN 的不一样.我们先来回顾下...
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Low Rate Wireless Personal Area Networks

Low Rate Wireless Personal Area Networks

Kỹ thuật lập trình

... shift to FIR speedWireless CommunicationsLow Rate Wireless Personal Area Networks 2Objectives•Describe a wireless personal area network (WPAN)•List the different WPAN standards and their ... work•Describe the security features of low-rate WPAN technology 3What is a WPAN?•Wireless personal area network (WPAN)–Group of technologies that are designed for short-range communications–Eliminates...
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High Rate Wireless Personal Area Networks

High Rate Wireless Personal Area Networks

Kĩ thuật Viễn thông

... a nanosecond long–Signal spreads over a very wide frequency band•In the UWB case, the signal spreads over a band that is at least 500 MHz wide –Orthogonal frequency division multiplexing ... Layer Functionality (continued)Wireless CommunicationsChapter 6High Rate Wireless Personal Area Networks Wireless# Guide to Wireless Communications 36Competition Among WPAN Standards•IEEE ... to Wireless Communications 28How UWB Works•UWB PHY–Digital signals need to be spread over a wide band•Using techniques such as FHSS or DSSS–UWB uses short analog pulses for signaling•Does...
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Wireless Local Area Networks

Wireless Local Area Networks

Kỹ thuật lập trình

... wireless 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 ... wireless clients can only communicate among themselvesWireless CommunicationsWireless Local Area Networks 4WLAN Components•Minimal hardware needed for a WLAN–Computer–ISP–Wireless network ... motherboard3WLAN Applications•Wireless networks are increasing in popularity•Installing cabling is inconvenient and very expensive–Wireless networks solve this problem•With a wireless...
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Wireless Metropolitan Area Networks

Wireless Metropolitan Area Networks

Kĩ thuật Viễn thông

... easily incorporate WiMAX networks 3What is a WMAN?•Wireless metropolitan area networks (WMANs)–Provide wireless connectivity across a substantial geographical area such as a large city•WMANs ... to an entire area with only a few radio transmitters–MMDS cell size can have a radius of up to 35 miles (56 kilometers)2Objectives•Explain why wireless metropolitan area networks (WMANs) ... wired networks beyond a single location•Without the expense of high-speed cable-based connections–Extend user mobility throughout a metropolitan area –Provide high-speed connections to areas...
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Tổng quan về mạng WAN (Wide Area Netwwork) - Phần mềm Cool Chat

Tổng quan về mạng WAN (Wide Area Netwwork) - Phần mềm Cool Chat

Kĩ thuật Viễn thông

... nam l mt yu t ht sc quan trng. Gii phỏp mng WAN ( Wide Area Network - Mng din rng ) c ỏp dng. Chỳng cú nhim v kt hp tt c cỏc mng LAN (Local Area Network ) xa li thnh mt mng duy nht cú ng truyn...
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Personal Area Networks (PANs)

Personal Area Networks (PANs)

Kỹ thuật lập trình

... C. and Heile R. F. Paving the Way for Personal Area Network Standards: anOverview of the IEEE P802.15 Working Group for Wireless Personal Area Networks, IEEE Personal Commu-nications, February, ... and Personal Digital Assistants (PDAs).Wireless Networks3 16Figure 11.14 Main differences between HomeRF versions 1.2 and 2.011Personal Area Networks (PANs)11.1 Introduction to PAN Technology ... collocated networks by checking the access code field on thereceived packets which is different for every piconet, as we explain later. However, when alarge number of piconets coexist in the same area, ...
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