2.0 Networking Ports Flashcards
The Three Port Groups
Well-Known Ports, Registered Ports, Dynamic or Private Ports
Well-Known Ports
Ports 0 to 1023 are considered well-known and are assigned by the internet. Assigned Number Authority (IANA), ports 23, and 443
Dynamic or Private Ports
Ports 49152 to 65535 can be used by an application without being registered with IANA
FTP
File Transfer Protocol (FTP): Provides insecure (no encryption) file transfers between a client and a server on a computer network, ports 20, and 21.
Ports 20,21
File Transfer Protocol (FTP)
SSH
Secure Shell (SSH): Provides secure remote control of another machine using a text-based environment (command-shell), port 22, REMOTE ACCESS
Port 22
Secure Shell (SSH), and Secure File Transfer Protocol (SFTP).
SFTP
Secure File Transfer Protocol (SFTP): Provides secure (encrypted) file transfers, port 22.
Telnet
Telnet: Provides insecure (no encryption) remote control of another machine using a text-based environment similar (command prompts) to SSH but came out first., port 23, REMOTE ACCESS
Port 23
Telnet
DNS
A computer system that translates human-readable domain names into numerical IP address, allowing users to access websites by providing the correct network location. Uses port 53. The phonebook for the internet.
Port 53
The Domain Name System (DNS) primarily uses UDP port 53 for communication, although it can utilize TCP port 53 in certain situations
DHCP
Dynamic Host Configuration Protocol (DHCP): Automatically provides network parameters, such as assigned IP address, subnet mask, default gateway, and the DNS server, ports 67, and 68.
Ports 67, and 68
Dynamic Host Configuration Protocol (DHCP).
TFTP
Trivial File Transfer Protocol (TFTP): A connectionless protocol that uses UDP as its transport, port 69.
Port 69
Trivial File Transfer Protocol (TFTP)
HTTP
Hypertext Transfer Protocol (HTTP): Used for insecure (no encryption) web browsing the data communication for the worldwide web, port 80, WEB SERVERS.
Port 80
Hypertext Transfer Protocol (HTTP).
POP3
Post Office Protocol Version Three (POP3): Used for receiving incoming emails. Is old but still used today, port 110, EMAIL SERVERS.
Port 110
Post Office Protocol (POP3).
NetBIOS
Network Basic Input/Output System (NetBIOS): Used for file or printer sharing in a window network, ports 137, and 139.
Ports 137, and 139
NetBIOS
IMAP
Internet Mail Application (IMAP): A newer method of retrieving incoming emails which improves upon the older POP3. Allows the ender to use and manipulate the email message, port 143, EMAIL SERVERS
Port 143
Internet Mail Application (IMAP)
SNMP
Simple Network Management Protocol (SNMP): Used to collect data about network devices and monitor their status, ports 161, 162, NETWORK MONITORING SERVERS.
Ports 161, and 162
Simple Network Management Protocol (SNMP)
LDAP
Lightweight Directory Access Protocol (LDAP): Used to provide directory services to your network, port 389, port 636, encrypted, AAA SERVERS
Ports 389
Lightweight Directory Access Protocol (LDAP)
HTTPS
Hypertext Transfer Protocol - Secure (HTTPS): Used as a secure and encrypted version of web browsing, port 443, WEB SERVERS.
Port 443
Hypertext Transfer Protocol- Secure (HTTPS).
SMB
Server Message Block (SMB): Used for windows file and printer sharing services, and other types of communication between different devices on our network. Used with NetBIOS, port 445.
Port 445
Server Message Block (SMB).
RDP
Remote Desktop Protocol (RDP): Provides graphical remote control of another client or server. And provides a full graphical user interface, port 3389, REMOTE ACCESS.
Port 3389
Remote Desktop Protocol (RDP).
VNC
Virtual Network Computing (VNC): Designed for thin client architectures, port 5900.
Port 5900
Virtual Network Computing (VNC).
Registered Ports
Ports 1024 to 49151 are considered registered and are usually assigned to proprietary protocols. Registered ports are assigned to companies through IANA.
