COMPTIA A+, Core 1, Memorize

Port 20

TCP, FTP Data, File Transfer Protocol

Port 21

TCP, FTP Control, File Transfer Protocol

Port 22

TCP, SSH, Secure Shell

Port 23

TCP, Telnet

Port 25

TCP, SMTP, Simple Mail Transfer Protocol

Port 53

UDP, DNS, Domain Name System

Port 67

UDP, DHCP Server, Dynamic Host Config Protocol

Port 68

UDP, DHCP Client, Dynamic Host Config Protocol

Port 80

TCP, HTTP, Hyper Text Transfer Protocol

Port 110

TCP, POP3, Post Office Protocol

Port 137, 139

UDP, NetBIOS

Port 143

TCP, IMAP4, Internet Mail Access Protocol

Port 161

UDP, SNMP Query, Simple Network Management Protocol

Port 162

UDP, SNMP Trap, Simple Network Management Protocol

Port 389

TCP, LDAP, Lightweight Directory Access Protocol

Port 443

TCP, HTTPS, Hyper Text Transfer Protocol Secure

Port 445

TCP, SMB, Server Message Block

Port 3389

TCP, RDP, Remote Desktop Protocol