简单介绍参考，
Various TCP and UDP ports - GeeksforGeeks
列表如下，
PORTServiceDescriptionTransport Protocol7EchoPort just echoes whatever is sent to it. This feature can be used in many attacks, such as Smurf/Fraggle.TCP and UDP20 /21File Transfer Protocol (FTP)Port used by FTP protocol to send data to the clientTCP22Secure Shell (SSH)Used as secure replacement protocol for TelnetTCP and UDP23TelnetPort used by Telnet to remotely connect to a workstation or server(unsecured)TCP25Simple Mail Transfer Protocol (SMTP)Used to send E-Mail over internetTCP53Domain Name System (DNS)Port for DNS requests, network routing, and zone transfersTCP and UDP67 /68Dynamic Host Configuration Protocol (DHCP)Used on networks that do not use static IP address assignment.UDP80Hypertext Transfer Protocol (HTTP)Used for browsing web-pages on a browserTCP110Post Office Protocol (POP3)Port used to retrieve complete contents of a server mailboxTCP143Internet Message Access Protocol (IMAP4)Internet Message Access Protocol (IMAP4) is a new protocol to read an email with a wider range of operationsTCP and UDP194Internet Relay Chat Protocol(IRC)allows communication in form of text between multiple parties, one or more clients can connect to a centralized server.TCP and UDP443HTTP with Secure Sockets Layer (SSL)Port used for secure web trafficTCP and UDP3389Remote Desktop Protocol(RDP)Port used by remote desktop to remotely manage other windows systemTCP and UDP更多详情参考，
https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
