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

Ngày tải lên: 01/09/2013, 10:30

Ngày tải lên: 19/06/2014, 10:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 18/02/2014, 04:20

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

Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 21/06/2014, 23:20

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

... 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