Hi all, Can anyone tell me that : if I set link delay to 5 ms, how long the distance of this link? Does anyone know that in NS, how long of the link delay per one kilometer? Can I use light speed to calculate the link distance if I know link delay? Thanks in advance. Pennatee. -- Ms. Pennatee Rohitsatian Master Student, Telecommunication Program. Asian Institute of Technology (AIT), Thailand. --