Which protocol is commonly utilized to invoke a web service?

Show Answers

Transmission Control Protocol (TCP)Hypertext Transfer Protocol (HTTP)Simple Mail Transfer Protocol (SMTP)Simple Object Access Protocol (SOAP)File Transfer Protocol (FTP)

Explanation

SOAP (Simple Object Access Protocol) is the protocol specifically designed for calling and exchanging information with web services, making it the correct choice. TCP and HTTP are underlying protocols, while SMTP is used for email, and FTP is for file transfers.