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