wireless metropolitan area network ppt

Ngày tải lên: 19/06/2014, 08:20

... WMAN? • Wireless metropolitan area networks (WMANs) – Provide wireless connectivity across a substantial geographical area such as a large city • WMANs primary goals – Extend wired networks ... Wireless Communications Wireless Metropolitan Area Networks 14 Multichannel Multipoint Distribution Service (MMDS) • Multichannel multipoint distribution service (MMDS) – Fixed broadband wireless ... size can have a radius of up to 35 miles (56 kilometers) 2 Objectives • Explain why wireless metropolitan area networks (WMANs) are needed • Describe the components and modes of operation of a...

Ngày tải lên: 13/09/2012, 10:52

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Ngày tải lên: 01/08/2014, 07:21

... faceplate 6644 1 152-XX 2 outlet labeling areas and 2 individual port ID areas 4-port faceplate 6644 1 154-XX 2 outlet labeling areas and 4 individual port ID areas CopperTen ™ 4-port staggered ... TNSCSFPSO4-YY 2 Includes: 2 outlet labeling areas and 4 individual port ID areas. 6-port faceplate 6644 1 156-XX 2 outlet labeling areas and 6 individual port ID areas Dual-gang flush mount faceplates ... w . a d c . c o m • + 1 - 9 5 2 - 9 3 8 - 8 0 8 0 • 1 - 8 0 0 - 3 6 6 - 3 8 9 1 Work Area Solutions Work Area Solutions Category 6A Modular Jacks *Replace XX with: 01 = White 06 = Blue 02...

Ngày tải lên: 24/01/2014, 15:20

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Ngày tải lên: 06/03/2014, 15:21

... can be implemented to increase network security. There are two primary types of IDS: network based and host-based. The network based system acts similarly to a network level firewall. It cannot ... information about the network con- figuration. Authentication, especially of exter- nal BACnet users. Network Layer Attacks I-Am-Router- To -Network The I-Am-Router-To -Network message can ... traffic across the untrusted network (LAN/Internet). • As a router, separates the trusted network from the untrusted and thus can act as a BACnet firewall, performing network layer or application...

Ngày tải lên: 14/03/2014, 22:20

... CONTINUED GROWTH In Washington Metropoligan Area THE FUTURE OF THE WASHINGTON METROPOLITAN AREA DISTRICT: The SBA Washington Metropolitan Area District Office serves the District of Columbia, ... Sustainability: The Washington Metropolitan Area employs more environmental scientists than any other area. This region is a close second to the New York metropolitan area in the absolute number ... Statistics, a the Washington Metropolitan Area employs a higher percentage of “knowledge workers” than any other area in the United States. Specifically, 24.3% of the area s workforce are employed...

Ngày tải lên: 15/03/2014, 21:20

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Ngày tải lên: 08/08/2014, 21:20

... using SIR • Then they shift to FIR speed Wireless Communications Low Rate Wireless Personal Area Networks 2 Objectives • Describe a wireless personal area network (WPAN) • List the different WPAN ... work • Describe the security features of low-rate WPAN technology 3 What is a WPAN? • Wireless personal area network (WPAN) – Group of technologies that are designed for short- range communications – Eliminates ... devices • Include – Bluetooth – 802.15.4 (ZigBee) 12 Bluetooth Protocol Stack (continued) 14 Bluetooth Protocol Stack (continued) • Network topologies (continued) – Scatternet • Group of piconets in which connections exist between...

Ngày tải lên: 13/09/2012, 10:52

... corrected – Also called error correction (FEC) Wireless# Guide to Wireless Communications 26 Mesh Networking (802.15.5) (continued) Wireless# Guide to Wireless Communications 28 How UWB Works • UWB ... are present in the same order in every frame Wireless# Guide to Wireless Communications 15 802.15.3 Network Topology (continued) Wireless# Guide to Wireless Communications 27 Ultra Wide Band (UWB) • Allows ... and storage Wireless# Guide to Wireless Communications 32 How UWB Works (continued) Wireless# Guide to Wireless Communications 18 Additional MAC Layer Functionality (continued) Wireless Communications Chapter...

Ngày tải lên: 13/09/2012, 10:52

... wired network interface port • AP functions – Wireless communications base station – Bridge between the wireless and wired networks 6 Wireless Network Interface Card (continued) 5 Wireless Network ... of 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 ... communicate among themselves Wireless Communications Wireless Local Area Networks 4 WLAN Components • Minimal hardware needed for a WLAN – Computer – ISP – Wireless network interface card – Access...

Ngày tải lên: 13/09/2012, 10:52