Computer Ports and Connectors Notes for SSC Exams

Computer ports are asked in SSC Computer Knowledge as short and direct questions on the name, the full form or the use of a port. These computer ports and connectors notes for SSC list every important port with its use and practice questions. Read it with the Input and Output Devices Notes and Computer Hardware Components Notes notes.

What Is a Port?

• A port is a socket on the computer where an external device is connected.
• A connector is the plug at the end of the cable that fits into the port.
• Ports are of two types: serial ports (data goes one bit at a time) and parallel ports (many bits go together).

Important Ports and Their Uses

USB Facts

• USB was developed by a team led by Ajay Bhatt (an Indian-American engineer at Intel).
• A USB port supports plug and play and hot swapping, which means that a device can be connected without restarting the computer.
• USB types include Type-A, Type-B, Micro-USB and Type-C (reversible).

Wireless Connections

• Bluetooth is a short-range wireless technology (about 10 metres) for headphones, speakers and mouse.
• Wi-Fi connects devices to a wireless network and the internet.
• Infrared needs a direct line of sight, like a TV remote.
• NFC (Near Field Communication) works at a very short distance and is used for contactless payments.

Video Ports Compared

USB Standards and Connector Types

• Type-A is the standard rectangular port of computers.
• Type-B is the squarish port of printers and scanners.
• Mini-USB and Micro-USB are small ports of old phones and cameras.
• Type-C is the small oval and reversible port of modern phones and laptops; it supports fast charging (USB Power Delivery).
• USB can supply power of 5 volts (and more with Power Delivery) to charge the devices.
• A USB hub adds more USB ports to a computer.

Network and Communication Ports

Audio, Storage and Other Ports

Terms Related to Ports

• Female connector has holes (socket); male connector has pins (plug).
• Plug and play means the computer detects the device automatically.
• Hot swapping means connecting or removing a device while the computer is running (USB).
• A docking station adds many ports to a laptop.
• A port replicator and a dongle (a small device that adds a port or a feature) are used with laptops.
• Port numbers in networking (such as 80 for HTTP and 443 for HTTPS) are logical ports and not physical ones.

Important Questions Explained

Question 1: What is the full form of USB?
Answer: Universal Serial Bus.

Question 2: Which port carries both video and audio to a TV?
Answer: HDMI.

Question 3: Which port is used to connect a computer to a LAN cable?
Answer: The Ethernet (RJ-45) port.

Question 4: Which port connects an older keyboard and mouse?
Answer: The PS/2 port.

Question 5: Who led the team that developed USB?
Answer: Ajay Bhatt, at Intel.

Question 6: Which wireless technology is used for short distances between headphones and a phone?
Answer: Bluetooth.

Quick Tips to Remember

• Link HDMI with video and audio, and VGA with old analog monitors.
• Remember RJ-45 with the Ethernet and LAN cable.
• Remember USB as the most common port and Type-C as the reversible one.
• Remember the PS/2 colours: purple for the keyboard and green for the mouse.
• Remember plug and play for USB.

Common Mistakes to Avoid

• Writing the full form of USB as Universal Service Bus.
• Confusing HDMI (digital) with VGA (analog).
• Mixing the serial and parallel ports.
• Writing Bluetooth as a wired technology.
• Confusing the Ethernet port with the telephone port.

Quick Revision Points

• USB = Universal Serial Bus; plug and play.
• HDMI = video and audio; VGA = analog video.
• RJ-45 = Ethernet port.
• Serial port sends one bit at a time; parallel sends many.
• Bluetooth is short-range wireless.

Practice Questions With Answers

1. What is the full form of USB?
   Answer: Universal Serial Bus (Plug and play).
2. Which port carries both audio and video?
   Answer: HDMI (Digital).
3. Which port is used for a LAN cable?
   Answer: Ethernet (RJ-45) (Network).
4. Which port connects an older monitor with 15 pins?
   Answer: VGA (Analog).
5. Which port was used for older printers?
   Answer: Parallel port (25 pins).
6. Which port is used for a keyboard and a mouse in older computers?
   Answer: PS/2 (Purple and green).
7. Which technology works at a short range using radio waves?
   Answer: Bluetooth (About 10 metres).
8. What is the full form of HDMI?
   Answer: High-Definition Multimedia Interface (Digital).
9. Which USB type is reversible?
   Answer: USB Type-C (Can be plugged both ways).
10. Which port connects a hard disk inside the computer?
    Answer: SATA (Serial ATA).

More Practice Questions With Answers

1. Which USB version has the speed of 480 Mbps?
   Answer: USB 2.0 (High-Speed).
2. Which USB port is reversible?
   Answer: Type-C (Modern phones).
3. Which port has 15 pins and carries analog video?
   Answer: VGA (Blue connector).
4. Which port carries video and audio in one cable?
   Answer: HDMI (Digital).
5. What is the 25-pin port of old printers called?
   Answer: Parallel port (LPT).
6. Which cable connects a computer to a LAN?
   Answer: RJ-45 (Ethernet).
7. Which port is used for a telephone line?
   Answer: RJ-11 (Modem).
8. What is the port number of HTTPS?
   Answer: 443 (Logical port).
9. Which slot is used to install a graphics card?
   Answer: PCIe (Internal).
10. What is connecting a device while the PC is on called?
    Answer: Hot swapping (USB).
11. What colour is the USB 3.0 port usually?
    Answer: Blue (5 Gbps).
12. What is a small device that adds a port to a laptop called?
    Answer: Dongle (Adapter).

How to Practise This Chapter

1. Read the tables once and learn the key facts by heart.
2. Revise the quick revision points the next day.
3. Attempt the practice questions above without looking at the answers.
4. Solve a full SSC CGL Tier 1 mini mock to test your general awareness.
5. Check the previous year papers to see how SSC asks computer questions.

Related Notes and Practice Papers

• Input and Output Devices Notes
• Computer Hardware Components Notes
• Computer Network Notes
• Computer Knowledge Notes for SSC
• SSC CGL Tier 1 Mini Mock

Explore More SSC Subjects

SSC exams test many subjects, so connect this topic with the related subjects below:

• General Science Notes
• General Awareness Notes
• Quantitative Aptitude Notes
• Reasoning Notes
• Electrical Engineering (SSC JE) Notes
• All SSC subjects and notes

Frequently Asked Questions

What is a computer port?

A port is a socket on a computer where an external device is connected.

What is the full form of USB?

USB stands for Universal Serial Bus.

What is HDMI used for?

HDMI carries digital video and audio to a TV, a monitor or a projector.

What is the difference between serial and parallel ports?

A serial port sends one bit at a time, while a parallel port sends many bits at the same time.

What is an Ethernet port?

An Ethernet (RJ-45) port connects a computer to a wired network using a LAN cable.

What is VGA?

VGA is the Video Graphics Array, a 15-pin analog port for older monitors.

What is plug and play?

Plug and play means that a device works when it is connected without installing anything manually.

Who developed USB?

USB was developed by a team led by Ajay Bhatt at Intel.

How many questions come from ports in SSC exams?

Usually one question comes from the ports and connectors.

What is the difference between a port and a connector?

A port is the socket on the computer, while a connector is the plug on the cable that fits into it.

What is the speed of USB 3.0?

USB 3.0 has a maximum speed of 5 Gbps and its port is usually blue.

What is a dongle?

A dongle is a small device that plugs into a port to add a feature or a connection, such as a Wi-Fi dongle.