Data Communications

Question 1

Is the process of sending digital information (usually in binary form) between two or more points

Answer 1

Data Communications

Question 2

Is the movement of encoded information by means of communication techniques

Answer 2

Data Communications

Question 3

it is the information that is stored in digital form (i.e information that has been processed, organized and stored).

Answer 3

Data

Question 4

Advantages of Digital Signals

Answer 4

easier to multiplex
easier to integrate into a switching system
easier to interface with other digital equipment
better noise immunity
better performance
easier to encode, decode, encrypt and scramble

Question 5

Disadvantages of Digital Signals

Answer 5

Have a Larger Bandwidth
Require Synchronization
Additional equipment
Not commonly compatible with existing equipment
Require ADC/DAC
Restricted in wired topology

Question 6

Signals, whether Voice , Video, or Binary , transmitted directly over a Cable are known as

Answer 6

Baseband Signals

Question 7

Signals that involve a modulated carrier are known as

Answer 7

Broadband Signals

Question 8

In 1832, He developed the first successful and practical data communication systems known as the TELEGRAPH

Answer 8

Samuel Morse

Question 9

In 1833, He Developed an unusual system based on a five-by-five matrix representing 25 letters. The idea was to send message over a single wire

Answer 9

Carl Friedrich Gauss

Question 10

In 1844 , First telegraph line was established between Baltimore and Washington D.C, the first message is

Answer 10

What hath God wrought!

Question 11

In 1874, She invented the telegraph multiplexer which allowed up to six different telegraph machines to be transmitted simultaneously over a single wire.

Answer 11

Emily Baudot

Question 12

In the 1930, a German engineer , demonstrated a computing machine.

Answer 12

Konrad Zuis

Question 13

In 1940, Company is given the credit for the first special purpose computer using electromechanical relays for performing logical operations

Answer 13

Bell telephone

Question 14

In 1946 , both developed the ENIAC computer

Answer 14

John Adam Presper Eckert and John Mauchley

Question 15

In 1949, they developed the first all-electronic diode-based computer capable of executing stored programs

Answer 15

US National Bureau of Standards

Question 16

In 1951, _____ computer was built by Remington Rand Corporation and was the first mass-produced electronic computer

Answer 16

UNIVAC Computer

Question 17

In 1970, ______ microcomputers were introduced

Answer 17

microprocessor-controlled microcomputers

Question 18

It creates set of rules and standards for graphics , document exchange, and provides models for equipment and system compatibility , quality enhancement , improved productivity, and reduced cost.

Answer 18

ISO
(International Organiztion for Standardization)

Question 19

formerly known as the Consultative Committee for International Telephony and Telegraphy (CCITT) , is now the standards organization for United Nations to develop the recommended set of rules for telephone and data communications

Answer 19

ITU-T
International Telecommunication Union - Telecommunication

Question 20

ITU-T developed __ Series for modem interfacing and data transmission over telephone lines

Answer 20

V Series

Question 21

ITU-T developed __ Series for data transmission over public digital networks, e-mail and directory services

Answer 21

X Series

Question 22

ITU-T developed __ and __ Series for ISDN and Broadband ISDN (Information Superhighway)

Answer 22

I and Q Series

Question 23

Three Sectors of ITU

Answer 23

ITU-T (Telecommunications Sector)
ITU-R (Radio Communication Sector)
ITU-D (Development Sector)

Question 24

it is the world’s largest professional society, which was founded in the United States and is comprised of electronics, computer and communications engineers

Answer 24

IEEE (Institute of Electrical and Electronics Engineers)

Question 25

it developed and standardized most of the widely used LAN Protocols

Answer 25

IEEE 802 Committee

Question 26

It is the official standards agency for the United States representative for ISO

Answer 26

American National Standard Institute (ANSI)

Question 27

It is a non profit U.S. trade association that established and recommends industrial standards.
It Developed the RS(recommended standard)
series of standards for data and telecommunications, and also sets the 568 Building Cabling Standards for twisted pair cables.

Answer 27

Electronics Industries Association
(EIA)

Question 28

It is the leading trade association in the communications and information technology industry

Answer 28

Telecommunications Industry Association
(TIA)

Question 29

It was originally formed to oversee ARPANET (advance research project agency network), and now it is a technical advisory group of the internet society

Answer 29

Internet Architecture Board (IAB)

Question 30

It is the large international community of network designers, operators, vendors , and researches concerned with the evolution of the Internet Architecture and the smooth operation

Answer 30

Internet Engineering Task Force
(IETF)

Question 31

It research of the importance of the evolution of the internet by creating focused, long term and small research groups working on topics related to Internet protocols.

Answer 31

Internet Research Task Force (IRTF)