Data Communication and Networking in English Session 3
Short Question
Q#32: What is different between base-band and board band transmission?
Ans: Base band:
Ans: Base band:
Transmission of digital or analog signal without modulation, using a low-pass channel.
Board band Transmission:
Board band Transmission:
Transmission of signals using modulation of a higher frequency signal. The term implies a wide-bandwidth data combined from different sources.
Q#33: What is signals?
Ans: In electronics, a signal is an electric current or electromagnetic field and TD bank routing number used to convey data from one place to another. The simplest form of signal is a direct current (DC) that is switched on and off; this is the principle by which the early telegraph worked. More
Ans: In electronics, a signal is an electric current or electromagnetic field and TD bank routing number used to convey data from one place to another. The simplest form of signal is a direct current (DC) that is switched on and off; this is the principle by which the early telegraph worked. More
Q#34: What is piggy backing?
Ans: The inclusion of acknowledgment on a data frame. Piggybacking is a bi-directional data transmission technique in the network layer (OSI model). It makes the most of the sent data frames from receiver to emitter, adding the confirmation that the data frame sent by the sender was received successfully (acknowledgement).
Ans: The inclusion of acknowledgment on a data frame. Piggybacking is a bi-directional data transmission technique in the network layer (OSI model). It makes the most of the sent data frames from receiver to emitter, adding the confirmation that the data frame sent by the sender was received successfully (acknowledgement).
Q#35: Draw the model of data communication?
Ans:
Q#36: What is flow control?
Ans: A technique to control the rate of flow of frames (packets or messages). Different data-link-layer protocols use different strategies for flow control.
Ans: A technique to control the rate of flow of frames (packets or messages). Different data-link-layer protocols use different strategies for flow control.
Q#37:.Compare analog and digital signals?
Ans: Analog signals: A continuous waveform that changes smoothly over time
Digital signals: A discrete signal with a limited number of values.
Ans: Analog signals: A continuous waveform that changes smoothly over time
Digital signals: A discrete signal with a limited number of values.
Q#38: Define Attenuation?
Ans: Attenuation is a general term that refers to any reduction in the strength of a signal. Attenuation occurs with any type of signal, whether digital or analog. Sometimes called loss, attenuation is a natural consequence of signal transmission over long distances.
Ans: Attenuation is a general term that refers to any reduction in the strength of a signal. Attenuation occurs with any type of signal, whether digital or analog. Sometimes called loss, attenuation is a natural consequence of signal transmission over long distances.
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