Which of the following protocols is considered to be connectionless?

A.
ICMP

B.
TCP

C.
SSL

D.
VPN

Explanation:
ICMP is a protocol within the TCP/IP protocol suite that provides IP
node information at the Network layer. While its job, particularly in the case of
its role in the PING utility, is often to determine a devices connection state, it
is considered a "connectionless" protocol in that it deals only with messaging and
status checking.