Which action does the ping 172.18.1.1 size 5 command perform?（）

A.It sends only five ping requests to the 172.18.1.1 destination.

B.It sends a continuous ping with a packet length of five bytes to the 172.18.1.1 destination.

C.It sends five rapid ping requests to the 172.18.1.1 destination.

D.It sends a continuous rapid ping with a packet length of five bytes to the 172.18.1.1 destination.