Final answer:
Cheryl is most likely using HTTP (Hypertext Transfer Protocol) while browsing the Web, which is different from FTP, SMTP, or SNMP, since HTTP is designed for retrieving web content.
Step-by-step explanation:
When Cheryl is browsing the Web, she is most likely using the HTTP (Hypertext Transfer Protocol). HTTP is the foundational protocol used for transmitting web pages over the internet. It is the protocol that enables users to connect to web servers to retrieve web content, such as HTML pages, which can then be displayed by a web browser.
Other protocols like FTP (File Transfer Protocol) are used for the transfer of files between computers on a network, SMTP (Simple Mail Transfer Protocol) is used for sending emails, and SNMP (Simple Network Management Protocol) is used for network management, which are not typically used for browsing the web.