When sending encrypted traffic from firewall to firewall, why does there need to be an extra IP header? Why cannot the firewall simply encrypt the packet, leaving the source and destination as the original source and destination?

How many pairs of chromosomes do human body cells contain?

Jasper and samantha are in a robotics competition. the guidelines state that the robots should be able to move a 10-gram weight at least 2 meters and turn in a circle. jasper and samantha have already built the robot. which step of the design process should they follow next to decide whether their robot meets the minimum criteria for the competition?

Need ! will choose brainliest! discuss the role of abstraction in the history of computer software.