Secure Network Protocols

Question 1

Telnet

Answer 1

Telnet (Telecommunication Network)

A legacy network protocol for bidirectional text-based communication over TCP/IP. Lacking encryption, it transmits data (including credentials) in plaintext, making it highly vulnerable to interception. Deprecated in favor of SSH (Secure Shell) for remote administration.

Question 2

IMAPS

Answer 2

IMAPS (Internet Message Access Protocol Secure)

A encrypted version of the Internet Message Access Protocol (IMAP), securing email retrieval between clients and servers. Operates on TCP port 993, leveraging TLS/SSL to protect credentials and message content from interception. Replaces legacy IMAP (port 143) as the modern standard for secure email access.

Question 3

SRTP

Answer 3

SRTP (Secure Real-Time Transport Protocol)

A encryption protocol for securing real-time audio/video streams (e.g., VoIP, video conferencing). It adds confidentiality (AES encryption), authentication (HMAC-SHA1), and replay protection to RTP packets, preventing eavesdropping and tampering. Defined in RFC 3711, it’s mandatory for modern secure communication apps.