Protocols & ports Flashcards
Protocols and the ports they function on.
File Transfer Protocol (FTP)
Makes files available for download across a network. Port 20 for data connection and 21 for control connection.
Secure Shell (SSH)
Makes a secure connection to the command line interface of a server on port 22.
Telnet
Makes an unsecure connection to the command line interface of a server on port 23.
Simple Mail Transfer Protocol (SMTP)
Transfer email messages across networks. IT finds the recipient IP or DNS server based on the domain name. Port 25 unsecure and port 587 for secured.
Domain Name System (DNS)
Facilitates identification of hosts by name alongside IP addressing. Port 53
Dynamic Host Control Protocol (DHCP) server
Provision an IP address configuration to clients. Port 67
DHCP Client
Request a dynamic IP address configuration from a server. Port 68
HyperText Transfer Protocol (HTTP)
Provision unsecure websites and web services. Port 80
Post Office Protocol (POP3)
Retrieve email messages from a server mailbox. Port 110 unsecure and port 995 secured.
NetBIOS over TCP/IP
Support networking features of legacy Windows versions. Port 137-139
Internet Mail Access Protocol (IMAP)
Read and manage mail messages on a server mailbox. Port 143 unsecured and port 993 secured.
Simple Network Management Protocol (SNMP)
Query status information from network devices. Port 161
Lightweight Directory Access Protocol (LDAP)
Query information about network users and resources. Port 389
HTTP Secure (HTTPS)
Provision secure websites and services. Port 443
Server Message Block (SMB)
Implement Windows-compatible file and printer sharing services on a local network (also sometimes referred to as Common Internet File System [CIFS]). Port 445
Remote Desktop Protocol (RDP)
Make a secure connection to the graphical desktop of a computer. Port 3389
