Complete List of Computer Ports with Types, Uses and Examples (2026)

Key takeaways

• Hardware ports are physical sockets, while network ports like 22 or 443 are numbers identifying services in TCP/IP, so confirm which one you mean.
• USB-C is only a connector shape, so check whether it carries Thunderbolt, USB4 or display signals before expecting a given speed.
• Legacy ports such as VGA, serial DB-9 and PS/2 still appear on lab and industrial gear, so keep the right adapters.

Use this page as a reference: modern ports first, with real speed figures, then a complete table of legacy connectors, then how to identify the ports on your own machine and keep them secure.

Hardware ports vs network ports: which do you mean?

This article covers hardware ports, the physical connectors on a computer. The word "port" also means a network port, a number such as 22 (SSH) or 443 (HTTPS) that identifies a service in TCP/IP. They are unrelated. If you need port numbers, see our list of common TCP and UDP ports.

Hardware ports fall into a few groups:

• Data and peripheral: USB-A, USB-C, Thunderbolt, eSATA, FireWire
• Display: HDMI, DisplayPort, DVI, VGA
• Network and communication: RJ-45 Ethernet, RJ-11, SFP, serial console
• Audio: 3.5 mm jack, optical (TOSLINK), RCA
• Legacy: PS/2, parallel, SCSI, game port, Apple-specific connectors

Which ports are on a modern laptop or PC?

Most laptops sold today have USB-C, at least one USB-A, HDMI and a headphone jack. Desktops add Ethernet, more USB and DisplayPort on the graphics card.

USB versions and names explained

USB-C is a connector shape, not a speed. A USB-C port can be as slow as USB 2.0 or as fast as USB4. The USB Implementers Forum (USB-IF) now asks makers to label ports by speed, such as "USB 10Gbps", because the old version names confused buyers. The USB-IF naming guidelines map old names to new ones.

Power is separate from data speed. With USB Power Delivery, a USB-C port can charge a laptop at up to 240 W, but only if the charger, cable and laptop all support that level.

USB-C vs Thunderbolt: what is the difference?

Thunderbolt uses the same USB-C connector but guarantees a higher minimum feature set. Any Thunderbolt 4 port supports 40 Gbps, two 4K displays and PCIe devices, while a plain USB-C port might support none of that. Thunderbolt 5, announced by Intel in 2023, doubles the base bandwidth to 80 Gbps and can boost to 120 Gbps for displays, according to Intel's Thunderbolt overview. Look for the lightning-bolt icon next to the port.

Display ports: HDMI vs DisplayPort vs VGA

For a modern monitor, use DisplayPort or HDMI; use VGA only when an old projector leaves you no choice. HDMI is standard on TVs and projectors and carries audio. DisplayPort is common on PC monitors and graphics cards and handles high refresh rates well. The HDMI Forum released HDMI 2.2 in 2025 with up to 96 Gbps, though devices that use it are only starting to appear.

Network and communication ports

The RJ-45 Ethernet jack is the port you will use most in networking work. A few others matter in labs and data centres:

• RJ-45 (8P8C): wired Ethernet. "8P8C" means 8 positions, 8 contacts.
• RJ-11 (6P2C or 6P4C): telephone lines and old dial-up modems. Smaller than RJ-45.
• SFP / SFP+: slots on switches and servers that take fibre or copper transceiver modules.
• Console port: on routers and switches, an RJ-45 or USB port that gives command-line access. From a laptop you connect with a USB-to-serial adapter and a console (rollover) cable. This is why serial knowledge still matters for anyone studying for the CCNA 200-301.
• F-connector (coax): screw-on connector for cable TV and cable broadband modems.

Audio ports

• 3.5 mm jack: analogue headphones, speakers and microphones. Some laptops use one combo jack for headset and mic.
• Optical (TOSLINK): digital audio carried as light, used with soundbars and home theatre receivers.
• Coaxial S/PDIF and RCA: digital or analogue audio on phono connectors, mostly on desktop sound cards and AV equipment.

Complete list of legacy and specialist ports

You won't find these on a new laptop, but you will on old servers, lab kit, industrial machines and in certification exams.

How to identify the ports on your computer

The quickest way is to check the icon next to each port and then confirm in software.

1. Read the icons. "SS" means SuperSpeed USB (5 Gbps or more), a lightning bolt means Thunderbolt, a "D" shape means DisplayPort, and a battery or plug icon means the port can charge.
2. Check the spec sheet. Search your exact model number on the maker's support site. It lists every port and its speed.
3. On Windows, open Device Manager and expand "Universal Serial Bus controllers" and "Display adapters".
4. On Linux, list USB devices with the speed each one negotiated:

lsusb -t # 480M = USB 2.0, 5000M = 5 Gbps, 10000M = 10 Gbps
lspci | grep -i -E "usb|thunderbolt"
boltctl list # Thunderbolt devices, where bolt is installed

On macOS, open System Information and look under USB and Thunderbolt/USB4.

Common mistakes and quick fixes

• Monitor not detected over USB-C: the port or cable may not support video (DisplayPort Alt Mode). Check the spec sheet and use a cable rated for video.
• External SSD slower than expected: it is probably plugged into a USB 2.0 port or using a USB 2.0 cable. Run lsusb -t or check the port icon.
• Laptop charging slowly: the charger or cable is rated below what the laptop needs.
• 4K at 120 Hz not working: the HDMI cable or port is an older version. You need HDMI 2.1 (or DisplayPort 1.4 or later) at both ends.
• No Ethernet link: check the link light, try another cable and confirm the switch port is enabled.

Why physical ports matter in cybersecurity

Every physical port is a way into a machine, so security teams control them. Common risks include:

• Malicious USB devices that pretend to be keyboards and type commands, such as the tool covered in our explainer on Rubber Ducky USB and how to defend against it.
• Data leaks through pen drives copied without permission.
• Direct memory access (DMA) attacks through Thunderbolt and other PCIe-capable ports on unattended, logged-in machines.
• "Juice jacking" risk from public USB charging points.

Defences are straightforward: disable unused ports in the BIOS/UEFI, enforce USB device control through endpoint policy, turn on Kernel DMA Protection where the hardware supports it, lock screens when you step away, and use your own charger instead of public USB points.

Next step

Pick up your own laptop, match every port to the tables above, and confirm their speeds with lsusb -t or System Information. Once the physical side is clear, move on to the logical side of networking with our guide to the 20 most common network ports.

Related reading

• How does a computer network work and what are the key components that enable network communication?
• What is Raspberry Pi Used For, How to Use It, and Real-Time Examples for Programming and Ethical Hacking | Raspberry Pi Explained
• A Beginner’s Guide to Computer Networking | Learn Basics, Components & Setup