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(A+) Common Ports

Common TCP and UDP Ports (A+)

tcp/20 File Transfer Protocol (FTP) Active Mode Data
tcp/21 File Transfer Protocol (FTP) Control
tcp/22 Secure Shell (SSH)
tcp/23 Telecommunication Network (Telnet)
tcp/110 Post Office Protocol v3 (POP3)
tcp/143 Internet Message Access Protocol v4 (IMAP4)
tcp/25 Simple Mail Transfer Protocol (SMTP)
udp/53 Domain Name System (DNS)
tcp/80 Hypertext Transfer Protocol (HTTP)
tcp/443 Hypertext Transfer Protocol Secure (HTTPS)
tcp/3389 Remote Desktop Protocol (RDP)
udp/137 NetBIOS name services (nbname)
udp/138 NetBIOS datagram service (nbdatagram)
tcp/139 NetBIOS session service (nbsession)
tcp/445 Server Message Block (SMB) (Also CIFS)
tcp/548 Apple Filing Protocol (AFP)
tcp/427 Service Location Protocol (SLP)
udp/427 Service Location Protocol (SLP)
tcp/53 Domain Name System (DNS)
udp/67 Dynamic Host Configuration Protocol (DHCP)
udp/68 Dynamic Host Configuration Protocol (DHCP)