Ports and Protocols Flashcards
What port is used for HTTP
Port 80
What is the number range of usable ports
Between 0 and 65,535
Ports 0 to 1023 are assigned by the Internet Assigned Numbers Authority (IANA)
Well-Known Ports
Ports 1024 to 49151 are usually assigned to proprietary protocols
Registered Ports
- Ports 49152 to 65535 can be used by any application without being
registered with IANA - Commonly used for gaming, instant
messaging, and chat
Dynamic or Private Ports
o Ports 20, 21
o Provides insecure file transfers
File Transfer Protocol (FTP)
o Port 22
o Provides secure remote control of another machine using
a text-based environment
Secure Shell (SSH)
o Port 22
o Provides secure file transfers
Secure File Transfer Protocol (SFTP)
o Port 23
o Provides insecure remote control of another machine
using a text-based environment
Telnet
o Port 25
o Provides the ability to send emails over the network
Simple Mail Transfer Protocol (SMTP)
o Port 53
o Converts domain names to IP addresses, and IP address
to domain names
Domain Name Service (DNS)
o Ports 67, 68
o Automatically provides network parameters such as
assigned IP address, subnet mask, default gateway, and
the DNS server
Dynamic Host Control Protocol (DHCP)
o Port 80
o Used for insecure web browsing
Hypertext Transfer Protocol (HTTP)
o Port 110
o Used for receiving incoming emails
Post Office Protocol Version Three (POP3)
o Ports 137, 139
o Used for file or printer sharing in a Windows network
Network Basic Input/Output System (NetBIOS)
o Port 143
o A newer method of retrieving incoming emails which
improves upon the older POP3
Internet Mail Application Protocol (IMAP)
o Ports 161, 162
o Used to collect data about network devices and monitor
their status
Simple Network Management Protocol (SNMP)
o Port 389
o Used to provide directory services to your network
Lightweight Directory Access Protocol (LDAP)
o Port 443
o Used as a secure and encrypted version of web browsing
▪ SSL (Secure Socket Layer)
▪ TLS (Transport Layer Security)
Hypertext Transfer Protocol – Secure (HTTPS)
o Port 445
o Used for Windows file and printer sharing services
Server Message Block (SMB)
o Port 3389
o Provides graphical remote control of another client or
server and provides a full graphical user interface
Remote Desktop Protocol (RDP)
