vectors] Can an FTP protocol be breached?

Yes, the File Transfer Protocol (FTP) can be breached using various techniques. Standard FTP, as defined in RFC 959, is inherently insecure because it transmits authentication credentials (username and password) and data in cleartext. This makes it highly vulnerable to sniffing attacks, where an attacker can intercept the traffic and capture the credentials. It is also susceptible to brute-force attacks, packet capture, and port stealing, making it an outdated and insecure protocol for transferring sensitive data without additional security layers like FTPS or SFTP.

A. This is factually incorrect. Standard FTP is widely recognized in the cybersecurity community as an insecure protocol due to its lack of encryption.

C. While social engineering is a valid attack vector, it is only one method. The protocol itself has technical vulnerabilities that can be exploited directly.

1. Postel, J., & Reynolds, J. (1985). RFC 959: File Transfer Protocol. Internet Engineering Task Force (IETF). Section 5.1 discusses the user authentication process, which does not specify encryption.

2. University of California, Berkeley. CS 161: Computer Security, Lecture Notes on Network Security. The course materials frequently cite FTP as a classic example of an insecure protocol that transmits credentials in the clear, making it vulnerable to eavesdropping.

3. Forouzan, B. A. (2013). Data Communications and Networking (5th ed.). McGraw-Hill. Chapter 26, "Multimedia," often discusses FTP and its security limitations in university networking courses.