Matching Pairs Ports Matching GameOnline version Match the port with its description in this interactive game about computer ports by Corinna Viruete 1 Simple Mail Transfer Protocol (SMTP) 2 Domain Name System (DNS) 3 Secure Shell (SSH) 4 Hypertext Transfer Protocol over Secure Socket Layer (HTTPS) 5 Dynamic Host Configuration Protocol (DHCP) 6 Network Basic Input/Output System (NetBIOS) over TCP/IP (NetBT) 7 Lightweight Directory Access Protocol (LDAP) 8 Simple Network Management Protocol (SNMP) 9 Telnet 10 Internet Message Access Protocol (IMAP) 11 Post Office Protocol 3 (POP3) 12 Remote Desktop Protocol (RDP) 13 File Transfer Protocol (FTP) 14 Hypertext Transfer Protocol (HTTP) 15 Server Message Block (SMB)/Common Internet File System (CIFS) 143 389 110 3389 20, 21 67, 68 80 443 137, 139 445 25 22 161, 162 53 23