【RenShiang Jen】評論
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【小威】評論
服務名稱協定埠號File Transfer Protocol (FTP)TCP21Secure Shell (SSH) TCP22TelnetTCP23Simple Mail Transfer Protocol (SMTP)TCP25Domain Name System (DNS)TCP/UDP53Dynamic Host Control Protocol (DHCP)UDP67、68Trivial File Transfer Protocol (TFTP)UDP69HyperText Transfer ProtocolTCP80Post Office Protocol 3 (POP3)TCP110Network Time Protocol (NTP)UDP123Internet Message Access Protocol (IMAP)TCP143Simple Network Management Protocol (SNMP)UDP161、162Secure Socket Layer (SSL)TCP443