Exam 10: Wireless Communications Systems

Both analog and digital land-mobile systems depend on __________ to provide wide-area coverage.

What percentage of the world's population counts themselves as wireless subscribers?

The use of cryptography means that the information being transmitted over the air is _________.

_________ involves the use of directional antennas to focus energy in preferred directions at the expense of others.

_________is the reflection of radio waves striking the RFID tag and reflecting stored unique identification information back to the transmitter source.

Which of the following is the secret code used in the encryption algorithm to create cipher text and to decode (decrypt)the message?

What concept involves using a regular arrangement of transmitter-receiver systems?

What is the basis of RFID tag classification?

__________ uses a frequency-hopping spread-spectrum format.

A(n)______ radio system to make maximal use of scarce radio spectrum.

__________ often use cryptography to protect the transmitted data from eavesdropping.

Which of the following professions would most likely use a specialized land-mobile radio (SMR)?

What type of radio provides the promise that licensed and unlicensed services can coexist in the same spectrum?

What standards were developed to address key delivery problems with wireless data networks?

What is the purpose of the vocoder?

The biggest advantages of wireless accessibility are user mobility and ______________.

What signaling format does WiMAX use?

What causes Rayleigh fading,particularly in urban areas?

A "bad guy" is listening and picking up what information can be obtained from your wireless network. What type of computer attack is this considered?

What are assigned around licensed channels to minimize the possibility of interference?