Computer Networks

871. The physical layer supports various encoding and signaling functions to convert data, from bit stream to frame and vice versa, to send across the network

1. Describing hardware specifications
2. Encoding and signaling
3. Data transmission and reception
4. None of these

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872. The physical layer uses four types of bit signaling approaches these are

1. RZ(return to zero) by using pulse signaling
2. NRZ(non return to zero) transmission by using level signaling
3. Manchester encoding by using phase signaling
4. NRZ-I(non return to zero-invertive) by using bandwidth
5. All of these

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873. The physical layers are

1. PMD
2. PHY
3. Both a & b
4. None of these

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874. The PMD stands for

1. Physical Medium Dependent
2. Physical Medium Distance
3. Physical Media Dependent
4. Permitting Medium Dependent

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875. The portions covered by the antenna are called

1. Portions
2. Sectors
3. Cell sector
4. None of these

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876. The PPTP is used to ensure that message transmitted from one VPN node to another are

1. Not secure
2. Secure
3. Networks
4. IPX

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877. The process of interconnecting different network is called

1. Internet
2. Internetwork
3. Network
4. Internetworking

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878. The processing required to transferring a packet from the source host to the destination host or to the relaying router are called

1. Fixed routing
2. Dynamic routing
3. Local routing
4. Distributed routing

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879. The protocol and data are totally independent, this property known as ____________

1. Transmission
2. Transparency
3. Transparent
4. Transport

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880. The protocol based on the assumption are called

1. Elementary data link protocol
2. Data link protocol
3. Sliding Window Protocol
4. HDLC

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