Palo Alto Networks (PANW) Certified Cybersecurity Entry-level Technician (PCCET) Practice Exam

Which one of these applications can be used as a tunnel for other applications?

1. A. Telnet

2. B. SMTP

3. C. HTTPS

4. D. SSH

The correct answer is: D. SSH

SSH, or Secure Shell, serves as a secure channel over an unsecured network in a client-server architecture. It provides a mechanism for securely accessing network devices and servers while allowing for the tunneling of other types of network traffic through its secure connection. One of the key features of SSH is its ability to create secure tunnels for applications that do not have their own encryption protocols. This means that you can use SSH to encapsulate and protect the data transmitted by other applications, making it a valuable tool for secure communication in various contexts, such as transferring files or managing remote servers. The other options listed—Telnet, SMTP, and HTTPS—do not function as tunnels for other applications in the same way. Telnet is known for being unencrypted and lacks the capability to tunnel other applications securely; SMTP is primarily used for sending emails and does not offer network tunneling features; while HTTPS (HTTP Secure) provides secure communication on the web, it is not designed for use as a generic tunneling protocol for other applications. Thus, SSH is distinctly important in this context for its tunneling capabilities.