Sounds right to me. Well, except for the part about just using one wire. Take UTP and Ethernet, for example. There's a pair of wires for transmit. But it's still not parallel communication.
Priscilla At 07:41 PM 4/16/02, Chuck wrote: >hey, Cil, I'm asking because I don't know, but aren't all links serial by >nature - be they ATM or ethernet or token ring or whatever. IE data is >placed onto and taken from the wire one bit at a time? > >parallel printing used eight wires for transmitting of data ( plus other >wires for control ) and if memory serves, had a limited distance - 25 feet >tops IIRC. > >if we look at al other technologies, they are all based on a single transmit >wire and a single receive wire - hence the one bit at a time limitation. > >is my thinking accurate? > >Chuck > >""Priscilla Oppenheimer"" wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > WANs (and LANs) use serial communication (one bit at a time). The only > > thing I can think of that uses parallel communication is old-style >printers. > > > > A serial interface can still be very fast. On the WAN side, RS-232 only > > supported speeds up to 64 Kbps. But RS-449 supports speeds up to 2 Mbps. > > Most WAN interfaces support RS-499, which is known as EIA/TIA-499 today. > > And then there's also HSSI which is 52 Mbps, and probably others that I > > can't think of off the top. > > > > Priscilla > > > > At 07:01 PM 4/16/02, rtiwari wrote: > > >Why WAN connection is called serial link. Is it same like > > >RS-232 serial link. If it's same then at a time we can transmit > > >only one bit.In this case WAN link will be having slower > > >bit transmission. > > >or WAN - serial link and RS-232 serial link are different. > > >Please reply > > >-Ravi > > ________________________ > > > > Priscilla Oppenheimer > > http://www.priscilla.com ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41682&t=41670 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
