Really i am a newbie about networking.I have seen some details about sync and async serial,but i am still not clear what is the diffrence between sync and async serial? And who can tell me the diffrent use of them? Do they just link WAN?
The following is what i extracted from cisco.com.
1: Synchronous serial interfaces on serial WAN interface cards
Interface speed: up to 2.0 Mbps (T1/E1); synchronous serial protocols: PPP, HDLC, LAPB, IBM/SNA; synchronous serial WAN services: Frame Relay, X.25, SMDS; synchronous serial interfaces supported on the WIC-1T, WIC-2T, and WIC-2A/S cards: V.35, EIA/TIA-232, EIA/TIA-449, X.21, EIA-530
2:Asynchronous serial interfaces on serial WAN interface cards
Interface speed: up to 115.2 kbps; Asynchronous serial protocols: Point-to-Point Protocol (PPP), Serial Line Internet Protocol (SLIP); asynchronous interface: EIA/TIA-232
