Ports and Protocols Flashcards
File Transfer Protocol (FTP)
Ports 20, 21
FTP provides basic method of transferring files.
Secure Shell (SSH)
Port 22
SSH secure control of remote systems.
Telnet
Port 23
Telnet used to remotely connect to another system.
Simple Mail Transfer Protocol (SMTP)
Port 25
SMTP is used when sending email.
Domain Name System (DNS)
Port 53
DNS provides address to name resolution.
Dynamic Host Configuration Protocol (DHCP)
Ports 67, 68
DHCP is used to assign IP address to network hosts.
Hypertext Transfer Protocol (HTTP)
Port 80
HTTP is used by web browsers and web servers to exchange web pages.
Post Office Protocol 3 (POP3)
Port 110
POP3 is used to get email from a remote server to a local client over an IP connection.
Network Basic Input/Output System (NetBIOS) over TCP/IP (NetBT)
Ports 137, 139
Port 139 is used to establish the connection between two computers.
Port 137 is used to transfer data.
Internet Message Access Protocol (IMAP)
Port 143
IMAP allows access to email from different locations.
Simple Network Management Protocol (SNMP)
Ports 161, 162
SNMP is used to monitor and manage network devices.
Port 161 is used by the SNMP manager to query agents
Port 162 is used by agents to send alerts to the SNMP manager
Lightweight Directory Access Protocol (LDAP)
Port 389
LDAP is the protocol used to access Network information such as usernames, passwords, computer accounts, group policies, and other user and device information across the network.
Hypertext Transfer Protocol over Secure Socket Layer (HTTPS)
Port 443
Referred to as HTTP over SSL, HTTPS is a secure form of HTTP that uses TLS to encrypt all communication.
Server Message Block (SMB)/Common Internet File System (CIFS)
Port 445
SMB enables the sharing of folders and printers on the network.
Remote Desktop Protocol (RDP)
Port 3389
RDP is a proprietary Microsoft protocol that allows a user to view and use the graphical desktop of a remote computer system as if they were sitting in front of it.
