2. METROPOLITAN AREA NETWORKS Legacy MAN Protocols and service SONET/SDH Fiber Channel Fiber Didributed Data Interface service Switched Multimegabit Data service Metropolitan Area Ethernet Gigabit Ethernet Ethernet (10G)
5. MAN technologies are borrowed from both the LAN and WAN and work primarily at the data layer Data Link Layer Hop-to-Hop delivery
6. The following are typical application for a MAN: LAN to LAN connectivity Storage area networks Telemedicine Delay-sensetive data such as Voip and video conferencing Low bit-rate synhronnous and asynchronous data such as telemetry alarm service WAN accces service High bit-rate data such as video on demand Traditional data and voice leased-line service
7. -Deliver bandwidht on demand simple increments that are readily configurable -Provide high reliability equivalent SONET/SDH -Offer simple and fast provosioning-Offer tiered service with traffic classified and segmented on a per user-or per-f -Provide SLA s with guaranteed latency jitter and packet loss-Enforce policy.-Provide end-to end security. -Provide usage-based billing LAGENCY MAN PROTOCOLS AND SERVICES:Fibre channel is a broandband protocol that is optimized for SAN s FDDI is the most fully developed of the alternatives but it is on the downward slope of its life cycle.
8. SONET/SDHThe fixed bandwith of SONET/SDH result in wasted capacity with either method.An entireOC-24 (1224Gbps)for example is reguired to carry gigabit Ethernet SONET/SDH channel runs at 1.7mbps and the next higher increment jumps to 51.48Mbps.(Figure32-1)
11. 10G Ethernet The supported ranges are: 1310 nm serial PMD for single-mode fiber up to 10 km 1550 nm serial PMD for single-mode fiber up to 40 km 850 nm serial PMD for multimode fiber up to 300 m 1310 nm serial wide wave division multiplexing (WWDM) PMD forsingle-mode fiber up to 10 km or multimode up to 300 m
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13. References Data communication lesson The Irwin Handbook of Telecommunications book www.google.com
