Simple reports of snakes biting humans may be misleading, as even the most deadly snakes often (perhaps 15 to 50 percent of the time) do not inject venom when they bite humans if restrained or attacked, and even if venom is injected it may be released in minimal quantities.
â¢On switches running the IP base or IP services feature set, use the sdm prefer vlan global configuration command only on switches intended for Layer 2 switching with no routing. When you use the VLAN template, no system resources are reserved for routing entries, and any routing is done through software.
Synchronous Data Link Control (SDLC) Although a subset of HDLC, SDLC was developed by IBM before HDLC, and was the first link layer protocol based on synchronous, bit-oriented operation. IBM defined SDLC for managing synchronous serially transmitted bits over a data link, and these links can be full/half-duplex, switched or unswitched, point-to-point, point to multipoint or even looped.