Computer Networks

801. The low frequency signal are

1. Audio
2. Video
3. Music
4. Data
5. All of these

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802. The lower layers are implemented by using ____________ with the incidence of hardware ‘reducing’ to software from layer 1 to layer 4

1. Software
2. Hardware
3. Both a & b
4. None of these

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803. The lower layers are layers

1. 1,2,3
2. 1,2,3,4
3. 1,2,3,4,5
4. 2,3,4,5,6

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804. The lowest layers of the TCP/IP establishes communication with

1. Upper layer
2. Physical media
3. Next layer
4. Protocol

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805. The MAC layer specifies how to handle

1. Synchronous data traffic
2. Asynchronous Data traffic
3. Both a & b
4. None of these

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806. The MAC sub layer is on the ____________ of the physical layer

1. Bottom
2. Mid
3. Top
4. None of these

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807. The machine code unit may be ____________ depending on the computer architecture:

1. 8 bit or 16 bit
2. 16 bit or 32 bit
3. 32 bit or 64 bit
4. 64bit or 128 bit

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808. The main advantage of this technique, it is easy to such

1. Signals
2. Also to detect them
3. Both a & b
4. None of these

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809. The main constraints are due to the physical medium that produces

1. Noise
2. Distortion
3. Attenuation
4. Dropouts
5. All of these

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810. The main disadvantage of CDM is

1. Protection from interference
2. Tapping as only the sender know the spreading code
3. Tapping as only the receiver know the spreading code
4. All of these

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