【单选题】End systems, packet switches, and other pieces of the Internet, run ( ) that control the sending and receiving of information within the Internet.
allows gateways to send error a control messages to other gateways or hosts
B.
provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another
C.
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem
【单选题】End systems, packet switches, and other pieces of the internet, ran ( ) that control the sending and receiving of information within the internet.