Soft Loop & Hard Loop?

[rgrcommo]

Could someone please tell me the difference for these? What does it realy mean when someone says " You can perform a soft loop". Any info would be great regarding this hard/soft loops.

[tepatel]

Here is the link which explains that it detail..

http://www.cisco.com/warp/public/471/hard_loopback.html

Thanks..Tejal

[rgrcommo]

thanks!

[james.chan]

Basically, Soft loop is a logical loop on the CSU/DSU and Hardware loop is a loop back connecter with WAN interface ,for example, V.35.

[o.hassairi]

in the above url we read: Note: All loopback testing is done with hdlc encapsulation.

does this mean we can't make a soft loop with PPP encapsulation?