Which port does the app usually connect to?
Generally, the ports connected by app are best displayed by mobile phones, tablets and computers, and it is best to manage them in a unified way. Port numbers less than 256 are commonly used. Commonly used reserved TCP port numbers are HTTP80, FTP20/2 1, Telnet23, SMTP25, DNS53, etc. Commonly used reserved UDP port numbers are DNS53, BootP67 (server) /68 (client), TFTP69, SNMP 16 1 and so on.