Chapter Five. TCP/IP Routing and Addressing
Objectives
1.2 Identify commonly used TCP and UDP default ports
TCP ports
FTP – 20, 21
SSH – 22
TELNET – 23
SMTP – 25
DNS – 53
HTTP – 80
POP3 – 110
NTP – 123
IMAP4 – 143
HTTPS – 443
UDP ports
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