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CompTIA Network+ N10-008 NET+ Port Numbers - Review

Information Technology29 CardsCreated 2 months ago

This flashcard set from the CompTIA Network+ N10-008 Port Numbers Review covers common ports and their functions. For example, Port 443 is used for HTTPS, securing web traffic with SSL/TLS encryption.

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PORT 443?

HTTPS (Hypertext Transfer Protocol Secure) over SSL/TLS

TCP over:

  • SSL = Secure Socket Layer Encryption

  • TLS = Transport Layer Security Encryption

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Key Terms

Term
Definition

PORT 443?

HTTPS (Hypertext Transfer Protocol Secure) over SSL/TLS

TCP over:

  • PORT 20?

    FTP (File Transfer Protocol)

    TCP:

    • 20 = Used fo...

PORT 389?

LDAP (Lightweight Directory Access Protocol)

TCP - For accessing and maintaining distri...

PORT 110?

POP3 (Post Office Protocol version 3)

TCP - Receives email from Servers.

PORT 1521?

Oracle SQL (Structured Query Language)

TCP

MySQL = TCP...

PORT 88?

Kerberos

TCP/UDP - Computer-Network authentication protocol that works on the basis of ...

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CompTIA Network+ N10-008 NET+ Port Numbers - Review
TermDefinition

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)