An achievement in providing worldwide Internet security was the signing of certificates associated with
which of the following protocols?

A.
TCP/IP

B.
SSL

C.
SCP

D.
SSH

Explanation:
SSL (Secure Sockets Layer) is used for establishing an encrypted link between two computers, typically a
web server and a browser. SSL is used to enable sensitive information such as login credentials and credit
card numbers to be transmitted securely.
Incorrect Answers:
A: TCP/IP (Transmission Control Protocol/Internet Protocol) is a layered suite of protocols used to enable
network communications between computers. All communications over the Internet between a Web
browser and a Web server use TCP/IP. HTTP and SSL run in the Application layer of the TCP/IP protocol
suite. TCP/IP itself does not use digitally signed certificates.
C: SCP (Secure Copy) uses SSH (Secure Shell) to copy files between computers using a secure encrypted
connection. SSH uses public and private keys in a similar way to SSL to encrypt the connection, however
SCP/SSH are not the protocols used to provide the “worldwide Internet security” that this question is
asking about.
D: SSH (Secure Shell) is commonly used to log into a remote machine and execute commands over a
secure encrypted connection. SSH uses public and private keys in a similar way to SSL to encrypt the
connection. However SSH is not the protocol used to provide the “worldwide Internet security” that this
question is asking about.

https://www.digicert.com/ssl.htm