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Questions and Answers
Guard bands are required for AM or FM radio stations.
True
Each signal in Time-Division Multiplexing transmits 2 units every 3T seconds.
False
A T-1 carrier carries Digital Signal 2 (DS-2) that combines 24 voice channels into a digital stream.
False
The bit rate for T-1 carrier system is 1.544 Mbps.
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Telephone subscribers are connected directly to Toll CO in the network structure.
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Framing is not required for telephone digital transmission.
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TV stations do not require guard bands.
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Twisted Pair Cables can achieve significant savings by combining many signals into one.
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Reliable communications are possible if the transmission rate R is less than the channel capacity C.
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Frequency-Division Multiplexing involves dividing channels into time slots instead of frequency slots.
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The formula for Shannon Channel Capacity C is C = Bc log2 (1 + SNR) bps.
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Multiplexing always involves using multiple cables for data transmission.
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In Frequency-Division Multiplexing, individual signals occupy frequency slots, not time slots.
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Bandwidth Bc and Signal-to-Noise Ratio (SNR) are the factors that determine the Shannon Channel Capacity C.
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Circuit switching involves establishing a dedicated communication channel before data transfer begins.
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Hierarchical networks are known for their complex routing mechanisms.
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Delay in circuit-switched networks does not include connection establishment time.
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The formula for connection establishment time in circuit-switched networks is 2τ + 2 Tsg.
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Transmission time is inversely proportional to data rate in circuit-switched networks.
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Connection tear-down time in circuit-switched networks is equal to the propagation time τ.
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The signaling network in circuit-switched networks does not involve intelligence inside the network.
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