ITT640 Part 1

Who demonstrated wireless telegraphy using EM waves in 1897?

• Nikola Tesla

• Heinrich Hertz

• Guglielmo Marconi

• Jagadish Bose

The work of Heinrich Hertz was mainly on:

• Frequency hopping

• Microwave transmission

• Electromagnetic wave transmission

• Optical fiber

Who invented the method for changing frequencies to avoid interference?

• Edison

• Tesla

• Marconi

• Lamarr

What early wireless technology did Hedy Lamarr help develop?

• Infrared

• Bluetooth

• Frequency hopping

• GPS

Which protocol in ALOHAnet inspired CSMA/CD?

• OSI Layer 3

• TCP

• ALOHA

• IPv4

What does the term “Wi-Fi” stand for?

• Wireless Fidelity

• Wireless Interference

• It’s just a brand name

• Wireless Integration Function

What year did IEEE ratify the original 802.11 standard?

• 1991

• 1997

• 2001

• 1989

The Wireless Ethernet Compatibility Alliance (WECA) is now called:

• IEEE

• Wi-Fi Tech

• Wi-Fi Alliance

• Wireless Group

When did ALOHAnet emerge?

• 1990

• 1940

• 1970

• 1985

Spread spectrum technology was first used:

• In 1980s

• During World War II

• In 1995

• For 5G