2.4 Common TCP/UDP Ports Flashcards
What does TCP and UDP stand for?
Transmission Control Protocol (TCP) is two-way communication.
Sends data in packets, which don’t have to be in order and can verify that data was received (or resend).
User Datagram Protocol (UDP) is one way, sends data without checking to verify it was received.
What is FTP?
File Transfer Protocol, uses tcp/20 and tcp/21.
Used to send/receive files between systems.
What is SSH?
Secure Shell, uses tcp/22
Used for Encrypted access/communication to console.
What is Telnet
Telecommunication Network, uses tcp/23.
Used for un-encrypted access to console.
What is SMTP?
Simple Mail Transfer Protocol, uses tcp/25.
Used to transfer email between Email Servers.
What is DNS Protocol?
Domain Name System (protocol), uses tcp/53 and udp/53.
Used to Convert a Domain Name into an IP Address.
What is HTTP?
Hyper-Text Transfer Protocol, uses tcp/80.
Used for Web Server communication.
What is HTTPS?
Hyper-Text Transfer Protocol Secure, uses tcp/443.
Used for Secure Web Server communication.
What is POP3?
Post Office Protocol v3, uses tcp/110.
Used to Receive email to an Email Client.
What is IMAP4?
Internet Message Access Protocol v4, uses tcp/143.
Used as the newer Email Client protocol.
What is RDP?
Remote Desktop Protocol, uses tcp/3389.
Protocol for Remote Desktop functionality.
What is NetBIOS Name Service?
Used to find, register, and remove Windows Services by name.
uses udp/137
What is NetBIOS Datagram Service?
Used for Windows Connectionless data transfer, uses udp/138
What is NetBIOS Session Service?
Used for Windows Connection-Oriented data transfer, uses tcp/139
What is SLP?
Service Location Protocol, uses tcp/427 and udp/427.
Used to Find Mac OS Services by Name.
Populates list of available devices.
