NET+ Port Numbers - Review Flashcards
PORT 443?
HTTPS (Hypertext Transfer Protocol Secure) over SSL/TLS
TCP over:
- SSL = Secure Socket Layer Encryption
- TLS = Transport Layer Security Encryption
PORT 20?
FTP (File Transfer Protocol)
TCP:
- 20 = Used for Data transmission via upload or download.
- 21 = Used to Connect, Start, and Control FTP Sessions.
PORT 389?
LDAP (Lightweight Directory Access Protocol)
TCP - For accessing and maintaining distributed Directory information services over an Internet Protocol (IP) Network.
Port 636 - LDAP TCP over SSL Encryption, nonstandard of LDAP.
PORT 110?
POP3 (Post Office Protocol version 3)
TCP - Receives email from Servers.
Port 995 = POP3 over TLS Encryption
PORT 1521?
Oracle SQL (Structured Query Language)
TCP
MySQL = TCP 3306
SQL Server = TCP 1433
PORT 88?
Kerberos
TCP/UDP - Computer-Network authentication protocol that works on the basis of Tickets to allow nodes communicating over a non-secure Network to prove their identity to one another in a secure manner.
PORT 123?
NTP (Network Time Protocol)
UDP - Network Time synchronization services.
PORT 69?
TFTP (Trivial File Transfer Protocol)
UDP - Very simple File Transfer Protocol, quick and easy to setup. Not used to transfer over the Internet, used in LANs.
PORT 22?
SSH (Secure Shell)
TCP - Encrypted - Remote Login Service.
PORT 53?
DNS (Domain Name Service)
UDP
TCP - For large transfers.
- Resolves Frequently Qualified Domain Names (FQDNs) to IP Addresses.
- Reverse DNS resolves IP Addresses to FQDNs.
PORT 21?
FTP (File Transfer Protocol)
TCP:
- 21 = Used to Connect, Start, and Control FTP Sessions.
- 20 = Used for Data transmission via upload or download.
PORT 5900?
VNC (Virtual Network Computing)
TCP - Cross-platform Remote Desktop Tool.
PORT 445?
SMB (Server Message Block)
TCP - Network File Sharing Protocol that allows applications on a computer to read and write to files and to request services from Server programs in a computer Network.
PORT 3306?
MySQL (Structured Query Language)
TCP
Oracle SQL = TCP 1521
SQL Server = TCP 1433
PORT 80?
HTTP (Hypertext Transfer Protocol)
TCP - World Wide Web, Web server Communications - unsecured.
PORT 23?
Telnet
TCP - Remote Console Access/Login Service - “in-the-clear” communication, no encryption.
PORT/s 5060 & 5061?
SIP (Session Initiation Protocol)
TCP/UDP - Signalling protocol used for initiating, maintaining, modifying and terminating real-time unified communication sessions between IP devices.
PORT 143?
IMAP (Internet Message Access Protocol)
TCP - Receives email with Management Features from Multiple Clients.
Port 993 = IMAP over TLS Encryption
PORT 25?
SMTP (Simple Mail Transfer Protocol)
TCP - Server to Server SENDing/Transfer of Email
Port 587 is used for SMTP over TLS Encryption.
PORT/s 161 & 162?
SNMP (Simple Network Management Protocol)
UDP:
161 = Sends commands to gathers statistics from Network Devices.
162 = Alerts and Notifications from SNMP managed Network Devices.
Versions:
- v1 = “in the clear”, No Encryption
- v2 = Still “in the clear”, No Encryption but allowed BULK Transfers.
- v3 = Encrypted, Authentication, with Message Integrity.
PORT 514?
Syslog
UDP - Standard for Message Logging, usually a central log collector where logs are consolidated (SIEM).
SIEM = Security Information Event Manager
PORT 3389?
RDP (Remote Desktop Protocol)
TCP - Desktop Share from a Remote Location.
PORT/s 67 & 68?
DHCP (Dynamic Host Configuration Protocol)
UDP - Automatic configuration of IP Addresses, Subnet Mask, and other configuration settings.
- 67 = Servers Listening
- 68 = Clients Listening
Dynamic = Pooled = Lease Times
DHCP Reservations = Addresses are assigned by MAC Addresses in the DHCP Server. (Reserved)
PORT 636?
LDAPS (Lightweight Directory Access Protocol Secure)
TCP - over SSL encryption
Nonstandard implementations of LDAP with Encryption.
Port 389 is the TCP unencrypted LDAP.
PORT 993?
IMAP over TLS Encryption
TCP over TLS Encryption
Port 143 = IMAP unencrypted
PORT 1433?
SQL Server (Structured Query Language)
TCP - Database Access
Oracle SQL = TCP 1521
MySQL = TCP 3306
PORT 587?
SMTP over TLS Encryption (Simple Mail Transfer Protocol)
TCP using TLS Encryption for Server to Server email SENDing/Transfers.
Port 25 = SMTP unencrypted
PORT 995?
POP3 over TLS Encryption (Post Office Protocol version 3)
TCP over TLS Encryption
Port 110 = POP3 unencrypted
PORT 520?
RIP (Routing Information Protocol)
- is one of the oldest distance-vector routing protocols which employs the hop count as a routing metric.
- prevents routing loops by implementing a limit on the number of hops allowed in a path from source to destination.
- The largest number of hops allowed for RIP is 15, which limits the size of networks that RIP can support.
- UDP PORT/s 520 (Messages) & 521 (Updates)
