In two-way communication, wherever a frame is received, the receiver waits and does not send the control frame (acknowledgment or ACK) back to the sender immediately. The receiver waits until its network layer passes in the next data packet. The delayed acknowledgment is then attached to this outgoing data frame. This technique of temporarily delaying the acknowledgment so that it can be hooked with the next outgoing data frame is known as piggybacking.Read More


The software utility Cron is a time-based job scheduler in Unix-like computer operating systems. Users that set up and maintain software environments use Cron to schedule jobs (commands or shell scripts) to run periodically at fixed times, dates, Read More