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A Cisco router feature with
which disparate environments can be integrated into a single, high-speed,
enterprise-wide network. Native Synchronous Data Link Control (SDLC) traffic
can be passed through point-to-point serial links with other protocol traffic
multiplexed over the same links. Cisco routers can also encapsulate SDLC frames
inside IP datagrams for transport over arbitrary (non-SDLC) networks. Replaces
proxy polling. See also proxy polling.
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