About this Study Set
This study set covers Telecommunications through
25 practice questions.
A collection of factual questions regarding the history, standards, and technical specifications of telecommunications. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 25 questions from the
Telecommunications History and Technical Milestones study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
In what year was the first commercial Transatlantic telephone cable, TAT-1, inaugurated?
-
A
1952
-
B
1956
-
C
1960
-
D
1964
2
What is the maximum frequency range typically associated with the 'Ka-band' used in satellite communications?
-
A
1-2 GHz
-
B
8-12 GHz
-
C
26-40 GHz
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D
70-100 GHz
3
Who is credited with the 1876 patent for the telephone, assigned patent number 174,465?
-
A
Alexander Graham Bell
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B
Elisha Gray
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C
Antonio Meucci
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D
Thomas Edison
4
The GSM standard, originally defined in 1987, stands for what specific historical name?
-
A
Global System for Mobile Communications
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B
General System for Messaging
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C
Group Special Mobile
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D
Global Standard for Modulation
5
How many bits are in a standard IPv4 address?
6
In which decade was the first successful commercial fiber optic link installed in Chicago by Bell Labs?
-
A
1960s
-
B
1970s
-
C
1980s
-
D
1990s
7
The Shannon-Hartley theorem relates the channel capacity to which two variables?
-
A
Voltage and Current
-
B
Bandwidth and Signal-to-Noise Ratio
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C
Resistance and Frequency
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D
Latency and Packet Loss
8
Which company launched the Telstar 1 satellite, the first active communications satellite, in 1962?
-
A
AT&T
-
B
NASA
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C
Intelsat
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D
Hughes Aircraft
9
What is the standard baud rate for the original RS-232 serial communication protocol designed for modems?
-
A
300 baud
-
B
1200 baud
-
C
9600 baud
-
D
19200 baud
10
The ARPANET, the precursor to the modern Internet, sent its first host-to-host message in what year?
-
A
1965
-
B
1969
-
C
1973
-
D
1983
11
What is the common frequency, in Gigahertz, of the unlicensed ISM band used by standard Wi-Fi (IEEE 802.11b/g)?
-
A
2.4 GHz
-
B
3.5 GHz
-
C
5.8 GHz
-
D
10 GHz
12
In the OSI model, which layer is responsible for routing and logical addressing (Layer 3)?
-
A
Data Link
-
B
Network
-
C
Transport
-
D
Session
13
The first SMS message was sent in December 1992; what were the words of the message?
-
A
Hello World
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B
Merry Christmas
-
C
Test Message
-
D
Signal Clear
14
How many channels were available in the original NMT (Nordic Mobile Telephone) system launched in 1981?
15
What is the typical width, in MHz, of a standard television channel in the PAL broadcasting system?
-
A
5 MHz
-
B
6 MHz
-
C
7 MHz
-
D
8 MHz
16
The 'Erlang' is a unit of measurement used in telecommunications to define what?
-
A
Signal interference
-
B
Data throughput
-
C
Offered traffic load
-
D
Latency
17
Which protocol, finalized in 1983, became the standard for data exchange on ARPANET, replacing NCP?
-
A
HTTP
-
B
TCP/IP
-
C
FTP
-
D
SMTP
18
In the context of optical fiber, what does the abbreviation 'SMF' stand for?
-
A
Standard Multimode Fiber
-
B
Single Mode Fiber
-
C
Signal Modulation Frequency
-
D
Synchronous Modular Frame
19
What is the nominal characteristic impedance, in Ohms, of standard coaxial cable used in video and RF applications?
-
A
50 Ohms
-
B
75 Ohms
-
C
100 Ohms
-
D
300 Ohms
20
The 'Moore's Law' observation was first published by Gordon Moore in what year?
-
A
1955
-
B
1965
-
C
1975
-
D
1985
21
Which organization, established in 1865, is the oldest international organization for telecommunications?
-
A
ITU
-
B
IEEE
-
C
ISO
-
D
ETSI
22
How many pins are in a standard RJ-45 connector used for Ethernet networking?
23
The 5G standard (IMT-2020) was officially defined by the ITU in which year?
-
A
2015
-
B
2017
-
C
2019
-
D
2021
24
What is the maximum effective range, in meters, of a Class 2 Bluetooth device?
-
A
1 meter
-
B
10 meters
-
C
50 meters
-
D
100 meters
25
The Morse code distress signal 'SOS' was officially adopted internationally in what year?
-
A
1901
-
B
1906
-
C
1912
-
D
1918
