प्रश्न और उत्तर का अभ्यास करें

प्र: A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session? 1308 0

  • 1
    Send a different source port number
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  • 2
    Restart the virtual circuit
    सही
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  • 3
    Decrease the sequence number
    सही
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  • 4
    Decrease the window size
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उत्तर : 4. "Decrease the window size"
व्याख्या :

Answer: D) Decrease the window size Explanation: A receiving host can control the transmitter by using flow control ( TCP uses windowing by default). By decreasing the window size, the receiving host can slow down the transmitting host so the receiving host does  not overflow its buffers.

प्र: When a station sends a transmission to the MAC address ff : ff : ff : ff : ff : ff, what type of transmission is it? 2416 0

  • 1
    Unicast
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  • 2
    Multicast
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  • 3
    Anycast
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  • 4
    Broadcast
    सही
    गलत
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उत्तर : 4. "Broadcast"
व्याख्या :

Answer: D) Broadcast Explanation: A transmission to the MAC address ff : ff : ff : ff : ff : ff is a broadcast transmission to all stations.

प्र: If a switch has three computers connected to it, with no VLANs present, how many broadcast and collision domains is the switch creating? 2193 0

  • 1
    Three broadcast and one collision
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  • 2
    Three broadcast and three collision
    सही
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  • 3
    one broadcast and three collision
    सही
    गलत
  • 4
    One broadcast and one collision
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उत्तर : 3. "one broadcast and three collision"
व्याख्या :

Answer: C) one broadcast and three collision Explanation: If a switch has three computersconnected to it, with no VLANs present , one broadcast and three collision domains are created.

प्र: If a hub has three computers connected to it, how many broadcast and collision domains is the hub creating? 3118 0

  • 1
    Three broadcast and one collision
    सही
    गलत
  • 2
    Three broadcast and three collision
    सही
    गलत
  • 3
    one broadcast and three collision
    सही
    गलत
  • 4
    One broadcast and one collision
    सही
    गलत
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उत्तर : 4. "One broadcast and one collision"
व्याख्या :

Answer: D) One broadcast and one collision Explanation: If a hub has three computers connected to it, one broadcast and one collision domain is created

प्र: What is the purpose of flow control? 1248 0

  • 1
    To ensure that data is retransmitted if an acknowledgment is not received
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  • 2
    To reassemble segments in the correct order at the destination device
    सही
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  • 3
    To provide a means for the receiver to govern the amount of data sent by the sender
    सही
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  • 4
    To regulate the size of each segment
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उत्तर : 3. "To provide a means for the receiver to govern the amount of data sent by the sender"
व्याख्या :

Answer: C) To provide a means for the receiver to govern the amount of data sent by the sender Explanation: Flow control allows the receiving device to control  the transmitter so the receiving device's buffer does not overflow.

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उत्तर :
व्याख्या :

The Data Link layer is responsible for the framing of data packets.

प्र: Which layer is responsible for converting data packets from the Data Link layer into electrical signals? 1363 0

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उत्तर :
व्याख्या :

The physical layer takes frames from the Data Link layer and encodes the 1s and 0s into a digital signal for transmission on the network medium.

प्र: At which layer is routing implemented , enabling connections and path selection between two end systems? 1581 0

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उत्तर :
व्याख्या :

The Network layer provides routing through an internetwork and logical addressing.

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