ISM 4220 EXAM 1 QUESTIONS AND ANSWERS
Telegraph - Answers - A telegraph is any apparatus or process to conveymessages
over long distances with nointermediary messenger.
Hydraulic Telegraph - Answers - A more sophisticated visualmedium which relied on a
fire tohave the viewer open the drain,and then stop it. Agreed uponsignals at various
water depthmade it one of the moresophisticated earlycommunication methods.
Semaphore - Answers - A semaphore system creates a visual signal thatcan be
transmitted over long-distances. Somesemaphore systems are still in use today
asbackups when radio communication fails.
Chappe Semaphore Telegraph - Answers - A relatively modern system
(opticaltelegraph) that used a network oftowers to transmit messages. Cutfour days into
two hours.
Heliograph - Answers - A relatively modern visualcommunication technology thatused
directed flashes of light andmorse code to transmit messages.Used into the 20th
century as itrequired little investment intoinfrastructure.
What are the properties of Messages - Answers - 1. Confidentiality
2. Integrity
3. Authenticity
Crimean War - Answers - Considered by many to be one of the first modern wars. The
first inthe telegraph era, which cut the time for news to reach home countriesto mere
hours.• Informed public opinion like never before. Some historians attributethis to
bringing down the UK's government due to the reporting ofpoor conditions of their
soldiers.
Civil War - The Union - Answers - • 300 miles of telegraph wire at the start• 15,000 miles
by the end
Telegraph Infrastructure - Answers - Use to be ran above ground with utility poles along
the road, now they are undersea cables
The Transatlantic Cable - Answers - The first successful message was sent in1858.
They threw a parade for it in NewYork City.While a massive accomplishment, thelow
voltage made messages extremelydifficult to decipher, and the line onlylasted about a
month and a half.
, World War I - Zimmerman Telegram - Answers - • A diplomatic proposal proposed by
German that would have hadMexico invade the U.S.• Not considered seriously by the
Mexican government.• A major contributor to why the U.S. decided to join World War I.
James Clerk Maxwell - Answers - Used the Maxwell Equation and stated that magnets
interfere with electronics
Heinrich Hertz - Answers - He proved that the existence of electromagnetic waves
based off Maxwell's Work. This is why Hertz (Hz) is named after him
Equation to find Hetz (f) from time - Answers - T = 1/t
Equation to find time from Hertz - Answers - 1/f
What is the time for 0.5 hertz - Answers - 2 seconds
What is the time for 1 hertz - Answers - 1 second
what is the time for 2 hertz - Answers - 0.5 seconds
What happens as Hertz Increase? - Answers - The amount of time decreases
Westerm Union - Answers - Dominated the telegraph service in the 19th and early 20th
centuries by creating the first transontinental telegraph line in the US. This telegraph
replaced the pony express. They built infrastructure (poles, wires) making the "Internet"
at the time.
Gugliemo Marconi - Answers - Made the first radio transmission in 1895 and began the
range 2 miles onward, in 1902 he made a transmission from canada across the Atlantic
and recieved a Nobel Prize in Physics
Reginald Fessenden - Answers - Made the first transmission of speech via radio in 1900
and the first two way communication accross the Atlantic in 1906
What is the radio Spectrum - Answers - 3 Hz to 3,000 Ghz
What is the lowes frequencies used for? - Answers - Submarines
What are higher frequenceies used for? - Answers - Mobile and Wi-Fi signals
Radar - Answers - An influential radio-basedtechnology, especially inWW2.Used by
ships, air trafficcontrol, and weather stations.
ARPANet - Answers - Created by the US department of Defense and was the first
network of networks. In 1982 the TCP/IP protocol was standardized
Telegraph - Answers - A telegraph is any apparatus or process to conveymessages
over long distances with nointermediary messenger.
Hydraulic Telegraph - Answers - A more sophisticated visualmedium which relied on a
fire tohave the viewer open the drain,and then stop it. Agreed uponsignals at various
water depthmade it one of the moresophisticated earlycommunication methods.
Semaphore - Answers - A semaphore system creates a visual signal thatcan be
transmitted over long-distances. Somesemaphore systems are still in use today
asbackups when radio communication fails.
Chappe Semaphore Telegraph - Answers - A relatively modern system
(opticaltelegraph) that used a network oftowers to transmit messages. Cutfour days into
two hours.
Heliograph - Answers - A relatively modern visualcommunication technology thatused
directed flashes of light andmorse code to transmit messages.Used into the 20th
century as itrequired little investment intoinfrastructure.
What are the properties of Messages - Answers - 1. Confidentiality
2. Integrity
3. Authenticity
Crimean War - Answers - Considered by many to be one of the first modern wars. The
first inthe telegraph era, which cut the time for news to reach home countriesto mere
hours.• Informed public opinion like never before. Some historians attributethis to
bringing down the UK's government due to the reporting ofpoor conditions of their
soldiers.
Civil War - The Union - Answers - • 300 miles of telegraph wire at the start• 15,000 miles
by the end
Telegraph Infrastructure - Answers - Use to be ran above ground with utility poles along
the road, now they are undersea cables
The Transatlantic Cable - Answers - The first successful message was sent in1858.
They threw a parade for it in NewYork City.While a massive accomplishment, thelow
voltage made messages extremelydifficult to decipher, and the line onlylasted about a
month and a half.
, World War I - Zimmerman Telegram - Answers - • A diplomatic proposal proposed by
German that would have hadMexico invade the U.S.• Not considered seriously by the
Mexican government.• A major contributor to why the U.S. decided to join World War I.
James Clerk Maxwell - Answers - Used the Maxwell Equation and stated that magnets
interfere with electronics
Heinrich Hertz - Answers - He proved that the existence of electromagnetic waves
based off Maxwell's Work. This is why Hertz (Hz) is named after him
Equation to find Hetz (f) from time - Answers - T = 1/t
Equation to find time from Hertz - Answers - 1/f
What is the time for 0.5 hertz - Answers - 2 seconds
What is the time for 1 hertz - Answers - 1 second
what is the time for 2 hertz - Answers - 0.5 seconds
What happens as Hertz Increase? - Answers - The amount of time decreases
Westerm Union - Answers - Dominated the telegraph service in the 19th and early 20th
centuries by creating the first transontinental telegraph line in the US. This telegraph
replaced the pony express. They built infrastructure (poles, wires) making the "Internet"
at the time.
Gugliemo Marconi - Answers - Made the first radio transmission in 1895 and began the
range 2 miles onward, in 1902 he made a transmission from canada across the Atlantic
and recieved a Nobel Prize in Physics
Reginald Fessenden - Answers - Made the first transmission of speech via radio in 1900
and the first two way communication accross the Atlantic in 1906
What is the radio Spectrum - Answers - 3 Hz to 3,000 Ghz
What is the lowes frequencies used for? - Answers - Submarines
What are higher frequenceies used for? - Answers - Mobile and Wi-Fi signals
Radar - Answers - An influential radio-basedtechnology, especially inWW2.Used by
ships, air trafficcontrol, and weather stations.
ARPANet - Answers - Created by the US department of Defense and was the first
network of networks. In 1982 the TCP/IP protocol was standardized
