WorksheetsData Comm 4
Total questions: 20
Worksheet time: 15mins
Based on the image, IFMMP is the (a) .
Based on the image, HELLO is the (a) .
If the encryption key is [letter + 1], what is the ciphertext if the plaintext is 'SECRET'?
(a)
If the decryption key is [letter - 1], what is the plaintext if the ciphertext is 'GJFTUB'?
(a)
It also known as a shared key or private key algorithm, uses the same key for encryption and decryption.
Symmetric encryption
Asymmetric encryption
Hashing is a two-way function that includes encryption and decryption.
TRUE
FALSE
State one usage of encryption and decryption.
What is the difference between channelization and multiplexing?
Give one application of channelization.
Give one importance of channelization.
In channelization protocols, what's the purpose of a guard band?
In this channelization protocol, the stations share the channel's bandwidth time-wise. Every station is allocated a fixed time to transmit its signal.
FDMA
TDMA
CDMA
In this channelization protocol, the stations share the channel's bandwidth time-wise. Every station is allocated a fixed time to transmit its signal.
FDMA
TDMA
CDMA
It is a transmission technique of combining multiple signals into one signal over a shared medium.
channelization
multiplexing
A voltage or a current is an example of a/an ____ signal.
digital
analog
It is used when bandwidth of the medium is greater than the combined bandwidths of the signals to be transmitted.
WDM
FDM
Synchronous TDM
Asynchronous TDM
Multiplexing and demultiplexing involve optic signals transmitted through fiber-optic cable.
WDM
FDM
Synchronous TDM
Asynchronous TDM
Each device is alloted with a fixed time slot, regardless of device has any data to transmit or not. The number of time slots is equal to the number of devices.
WDM
FDM
Synchronous TDM
Asynchronous TDM
Give one benefit of multiplexing.
Give one application of multiplexing.
