Generalized Multiprotocol Label Switching (GMPLS) Most of the
Generalized Multiprotocol Label Switching (GMPLS) Most of the telecommunications networks have evolved to carry voice traffic and general data packets. Neither of these models is really suited to the streaming of multimedia. IP routing has evolved to use label switching, which can improve the efficiency of network communications. MPLS is a potential technology that can improve the QoS of content delivery, by allowing traffic engineering of packet routing. Generalized MPLS extends this capability to cover legacy ATM and SONET terminal equipment plus the new optical cross-connects, so that potentially IP can be transmitted directly over DWDM. The local loop There is a wide choice of connections to the Internet, split into the lower cost services for the consumer and higher capacity services for corporate systems. Services tailored to the domestic consumer, for reasons of cost, usually use existing connections. Virtually all homes have a copper pair from the telephone company, and many in metropolitan areas have a coaxial connection to the local cable television system. Both of these connections can be used to carry Internet data alongside the existing services. Wireless also offers connectivity, sometimes as a hybrid with a telephone back-channel. The enterprise user A corporate user with tens or hundreds of users will require a higher bandwidth and more reliable connection to the Internet. Traditional connections like a T-1 30 The Technology of Video and Audio Streaming IP with GMPLS fiber DWDM technology DWDM SONET ATM IP Figure 2.7 The technology migration to photonic routing.
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