Remote Access and Mail Protocols
Meet SSH, Telnet, SMTP, and other key service protocols.
Managing and Mailing Remotely
Beyond the web, technicians rely on protocols for remote management and email. This lesson covers SSH, Telnet, RDP, and the mail trio of SMTP, POP3, and IMAP.
Each has a standard port and a security profile you should commit to memory for the exam.
SSH on Port 22
SSH (Secure Shell) provides an encrypted command-line connection to a remote device. It uses TCP port 22.
SSH is the standard for securely managing servers, switches, and routers. All commands and credentials are encrypted, making it safe to use even across untrusted networks.
All lessons in this course
- TCP vs UDP at a Glance
- What Port Numbers Are For
- Web and File Transfer Protocols
- Remote Access and Mail Protocols