80 - HTTP, 443 - HTTPS, POP3 - 110, POP3 SSL - 995, 143 - IMAP, IMAP SSL - 993, 25 - SMTP, SSH - 22, 20,21 - FTP, TELNET - 23, HTTP - Unsecured web browsing, HTTPS - Used for secure web browsing, SMTP - Used to send Emails, IMAP - Used to sync up devices with Email, Downloads an email but doesn't keep a copy on the server - POP3, Used to remote into a device using a Terminal - SSH, 53 - DNS, 67,68 - DHCP, SNMP - 161,

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