MazoCardsJavaScript Array Methods
Core JavaScript array methods every frontend developer should recognize quickly.
Programming flashcards
Common TCP and UDP Ports
Common TCP and UDP port flashcards for networking, sysadmin, and CompTIA-style review.
#networking#ports#tcp#udp
About this deck
This common TCP and UDP ports deck helps learners memorize service names and default port numbers used in networking, troubleshooting, and certification review.
The deck focuses on practical ports such as SSH, DNS, DHCP, HTTP, HTTPS, SMTP, IMAP, LDAP, SMB, RDP, PostgreSQL, MySQL, Redis, MongoDB, and more.
41cards
Beginner to intermediate networkinglevel
networking students, sysadmins, developers, and certification learnersaudience
What you will learn
- Common TCP and UDP service ports.
- Protocol names that appear in networking exams and troubleshooting.
- Which services use TCP, UDP, or both.
- A quick reference base for firewall rules and service discovery.
How to study this deck
- Study service to port first, then reverse the direction mentally from port to service.
- Group ports by topic: web, mail, file sharing, directory services, databases, and remote access.
- Pair memorization with real tools such as netstat, ss, nmap, or firewall rules when practicing hands-on.
Scope
This deck covers common defaults. Real services can run on nonstandard ports, so use it as study material rather than a production audit checklist.
Review notes
Network port list last reviewed for public SEO pages on 2026-07-06.
All 41 cards in this deck
| Front | Back |
|---|---|
| FTP data | TCP 20 |
| FTP control | TCP 21 |
| SSH | TCP 22 |
| Telnet | TCP 23 |
| SMTP | TCP 25 |
| DNS | TCP/UDP 53 |
| DHCP server | UDP 67 |
| DHCP client | UDP 68 |
| TFTP | UDP 69 |
| HTTP | TCP 80 |
| POP3 | TCP 110 |
| NNTP | TCP 119 |
| NTP | UDP 123 |
| Microsoft RPC | TCP 135 |
| NetBIOS name service | UDP 137 |
| NetBIOS datagram service | UDP 138 |
| NetBIOS session service | TCP 139 |
| IMAP | TCP 143 |
| SNMP | UDP 161 |
| SNMP trap | UDP 162 |
| LDAP | TCP/UDP 389 |
| HTTPS | TCP 443 |
| SMB over TCP | TCP 445 |
| SMTPS | TCP 465 |
| Syslog | UDP 514 |
| SMTP submission | TCP 587 |
| IPP printing | TCP 631 |
| LDAPS | TCP 636 |
| IMAPS | TCP 993 |
| POP3S | TCP 995 |
| Microsoft SQL Server | TCP 1433 |
| Oracle Database listener | TCP 1521 |
| NFS | TCP/UDP 2049 |
| MySQL | TCP 3306 |
| RDP | TCP/UDP 3389 |
| PostgreSQL | TCP 5432 |
| VNC | TCP 5900 |
| Redis | TCP 6379 |
| HTTP alternate | TCP 8080 |
| HTTPS alternate | TCP 8443 |
| MongoDB | TCP 27017 |
Frequently asked questions
Is this useful for CompTIA Network+ style study?
Yes. Common service ports are a frequent networking study topic, although learners should still follow their official exam objectives.
Does DNS use TCP or UDP?
The deck lists DNS as TCP/UDP 53 because both can be used depending on the query and transfer type.
Are these ports always fixed?
No. They are common defaults. Administrators can configure many services to use different ports.
Is the Common TCP and UDP Ports flashcard deck free?
Yes. You can study it free in your browser on MazoCards. Create a free account to save progress, track streaks, and sync across devices.
More Programming flashcards
Git Commands Cheat Sheet
Common Git commands for everyday development, commits, branches, and debugging history.
Python Basics: Syntax & Data Types
A friendly Python starter deck covering variables, collections, functions, and control flow.
React Hooks Essentials
Core React hooks and when to use them in modern component code.
SQL Basics: Queries & Joins
Essential SQL concepts for reading data, filtering rows, and joining tables.
CSS Flexbox and Grid
CSS layout flashcards covering Flexbox, Grid, alignment, tracks, gaps, and responsive patterns.
Start studying Common TCP and UDP Ports
Study these 41 cards free, then create an account to save your progress and build a streak.