Multiple Choice
Physical layer provides
A) mechanical specifications of electrical connectors and cables
B) electrical specification of transmission line signal level
C) specification for IR over optical fiber
D) all of the mentioned
Correct Answer:

Verified
Correct Answer:
Verified
Q15: Wireless transmission can be done via<br>A)radio waves<br>B)microwaves<br>C)infrared<br>D)all
Q16: 1 TeraHertz =<br>A)1000000 Hz<br>B)1000000000 Hz<br>C)1000000000000 Hz<br>D)None of
Q17: Transmission data rate is decided by<br>A)network layer<br>B)physical
Q18: Analog to digital conversion can be done
Q19: Ethernet uses a _ physical address that
Q20: A single channel is shared by multiple
Q21: Which address is used in an internet
Q22: QAM combines<br>A)ASK and FSK<br>B)FSK and PSK<br>C)ASK and
Q23: NRZ L and NRZ I differ in<br>A)synchronization<br>B)transition<br>C)Both
Q24: The frequency of the modulated signal is