The document outlines various ports and connectors found on computer CPUs, detailing their functions and types, including PS/2, USB, Ethernet, and VGA ports. Additionally, it explains the differences between physical and logical ports, along with common standards such as RS-232 and parallel ports. Various questions related to these ports and their specifications are provided to help with understanding.

1. Ports and connectors of computer
CPU ports
 Ports are located at the rear panel of CPU.
 Ports help connection of various peripherals (like keyboard, mouse, printer, scanner,
camera, speaker, microphone, audio-input, monitor, serial modem, broadband line, etc.) to
thecomputer.
 Some of the most common ports are: (i) PS/2 (Personal System 2) ports for keyboard and
mouse; (ii) RS-232 (Recommended Standard 232)/ Serial port for mouse, modem and
otherserial devices; (iii) VGA (Video Graphics Array) port for connecting monitor or
projector;(iv) Ethernet / RJ-45 (Registered Jack 45) for broadband connection; (v) USB
(UniversalSerial Bus) port for connecting printer, fax, pen drive, external hard disk, external
DVDwriter, web camera, etc.; (vi) LPT (Line Printer Terminal) port for connecting old style
dotmatrix/ line printers; (vii) 3.5mm audio jack for speaker output/ mic input; (viii) Gameport
- port for connecting joystick.
PS/2 Port :The PS/2 (Personal System/2) port, also referred to as the mouse port or keyboard
port, was developed by IBM. It is used to connect a computer mouse or keyboard to an IBM
compatible computer. The PS/2 port is a mini DIN plug that contains six pins and is still
sometimes found on all IBM compatible computers.

2. USB Port :Universal Serial Bus is an industry standard that establishes specifications for cables
and connectors and protocols for connection, communication and power supply between
computers, peripherals and other computers.
Ethernet Port :An Ethernet port (also called a jack or socket) is an opening on computer network
equipment that Ethernet cables plug into. Their purpose is to connect wired network hardware in
an Ethernet LAN, metropolitan area network (MAN), or wide area network (WAN).
Serial Port :In computing, a serial port is a serial communication physical interface through
which information transfers, either in or out, one bit at a time (in contrast with parallel port). During
most of the personal computers history, serial ports connected computers to devices such as
terminals and various peripherals.
Parallel Port :In computing, a parallel port is a type of interface found on computers (personal
and otherwise) for connecting peripherals. The name refers to the way the data is sent; parallel
ports send multiple bits of data at once (parallel communication), as opposed to serial
communication, in which bits are sent one at a time.
VGA Port :A Video Graphics Array connector is a three-row 15-pin DE-15 connector. The 15-pin
VGA connector was provided on many video cards, computer monitors, laptop computers,
projectors, and high definition television sets.

3. 1. The standard used in serial ports to facilitate communication is
a) RS-246 b) RS-HEETSON c) RS-232-C d) RST 3
Ans. c
2. Transformation between the parallel and serial ports is done with the help of
a) Flip flops b) logic circuits c) Shift registers d) peripherals
Ans. c
3. Components used to increase the flexibility of the serial ports is
a) wire used for port is changed
b) ports are made to allow different clock signals for input and output
c) the drives are modified
d) connects the new cables
Ans. b
4. Physical ports are usually referred to as _______
a) jacks b) cables c) interfaces d) hardware plugs
Ans. c
Explanation: Physical ports are connections that connect two systems for their interaction. LAN,
PS2 and DVI are example of physical ports.
5. _______ are logical numbers assigned for logical connections.
a) Logical ports b) Physical ports c) Networking cables d) IP address
Ans. a
Explanation: Logical ports are end-point to a logical connection. The numbers are pre-assigned
by IANA (Internet Assigned Numbers Authority) which ranges from 0-65536.
6. Number of logical ports ranges from ___ to _____
a) 0, 255 b) 1, 65535
c) 1, 65536 d) 0, 65536
Ans. d
7. Virtual ports help software in sharing without interference all hardware resources.
a) True b) False
Ans. a
8. _____ needs some control for data flow on each and every logical port.
a) Antivirus b) Network firewall c) Intrusion Detection Systems (IDS) d) Anti-malware
Ans. b

4. 9. The logical port is associated with the type of protocol used along with the IP address of the
host.
a) True b) False
Ans. a
10. Which of the following is the port number of FTP data?
a) 20 b) 21 c) 22 d) 23
Ans. a
11. RS-232 is a standard that applies to:
a) serial ports b) parallel ports c) small ports d) networks
Ans. a
1. There are ____ major types of ports in computers.
a) 1 b) 2 c) 3 d) 4
2. PS2 and USB are example of _______ ports.
a) Physical b) Logical c) Both A and B d) None of these
3. Logical ports are also known as ______
a) numbers ports b) virtual numbering c) virtual ports d) networking protocol ports
4. On the PC side, the printer port is a:
a) 25 pin female serial connector b) 15 pin female parallel connector
c) 25 pin male serial connector d) 25 pin female parallel connector
5. Which company developed PS/2 Ports
a) IBM b) Intel c) Airtel d) Microsoft
6. PS/2 port is also called ______
a) DVN plug
b) DIN plug
c) input plug
d) round plug
7. How many pins in PS/2 ports
a) 2 b) 4 c) 6 d) 8

5. 8. Green color PS/2 Port is used to connect
a) Mouse
b) Keyboard
c) Printer
d) Monitor
9. Purple color PS/2 Port is used to connect
a) Mouse b) Keyboard c) Printer d) Monitor
10. USB stands for_____
a) Universal serial bus
b) Universal system bus
c) Universal special bus
d) Universal small bus
11. What is the name of this port.
a) Ethernet port
b) USB port
c) HDMI port
d) Serial port
12. What is the name of this port.
a) Ethernet port b) HDMI port c) Printer Port d) eSATA port
13. Parallel port are used to connect
a) Modem b) Printer c) Monitor d) Projetor

6. 14. VGA stands for _______
a) Video game adapter b) Video Graphics Array
c) Video Graphics Adapter d) Visual Graphics Array
15. A Video Graphics Array connector is a _____ row and _____ pin
a) 3, 15 b) 2, 25 c) 1, 10 d) 6, 12
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