20 / 21 - FTP, 22 - SSH / SFTP, 23 - Telnet, 25 - SMTP, 548 - AFP, 53 - DNS, 80 - HTTP, 443 - HTTPS, 110 - POP3, 143 - IMAP, 3389 - RDP, 137 / 138 / 139 - NetBIOS, 445 - SMB / CIFS / Samba, 67 / 68 - DHCP, 389 - LDAP, 161 / 162 - SNMP, 427 - SLP, 69 - TFTP, 514 - Syslog,

CompTIA A+ | Port to Protocol

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