period of a signal is 100 ms. Then the frequency The of this signal in kilohertz is ______.
10 -2
Convert the period: \(T=100\,\mathrm{ms}=0.1\,\mathrm{s}\). Hence \(f=1/T=10\,\mathrm{Hz}=10^{-2}\,\mathrm{kHz}\).
Important Questions from Physical Layer
Which of the following statement(s) is/are correct?
I. Metropolitan area network is a collection of Local area network.
II. Metropolitan area network support both data and voices transmission.
In the standard Ethernet with transmission rate of 10 Mbps, asssume that the length of the medium is 2500 m and size of a frame is 512 bytes. The propagation speed of a signal in a cable is normally 2 × 108 m/s. The transmission delay and propogation delay are
Consider the following statements regarding modems used in computer network:
S1: Modems are required when communication medium carries analog signals
S2: Modulation converts digital data into analog form
S3: Demodulation converts analog data into digital form
S4: Modems assign MAC addresses to computers.
Which statements are TRUE?
Consider the following statements about RS-232 ports and connectors.
S1: DB9 connector is associated with RS-232
S2: RS-232 uses RJ45 connector for standard serial communication
S3: RS-232 communication is point-to-point.
Which statements are TRUE?
Which of the following statements is TRUE about data transmission modes?
