Computer Networking
The IEEE 802 project of the 1980s involved further defining the lower two layers of the OSI model. A number of standards were agreed upon during that time. Which of the following is the standard for Ethernet?

802.3
802.2
802.6
802.5
802.4

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Computer Networking
Which of the following summation operations is performed on the bits to check an error-detecting code?

Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions
Checksum
Attenuation
Coder-decoder
Codec

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Computer Networking
Bulletin board system

converts analog signals to digital signals
is a modem capable of accepting commands
None of these
is a public access message system
converts digital signals to analog signals

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