9.3.9 Check Your Understanding – Reliability and Flow Control Answers

1. What field is used by the destination host to reassemble segments into the original order?

  • Control Bits
  • Destination Port
  • Sequence Number
  • Source Port
  • Window Size

Explanation: The sequence number field is used by the destination host to reassemble segments into the original order.

2. What field is used to provide flow control?

  • Control Bits
  • Destination Port
  • Sequence Number
  • Source Port
  • Window Size

Explanation: The Window Size field is used to provide flow control.

3. What happens when a sending host senses there is congestion?

  • The receiving host increases the number of bytes it sends before receiving an acknowledgment from the sending host.
  • The receiving host reduces the number of bytes it sends before receiving an acknowledgment from the sending host.
  • The sending host increases the number of bytes it sends before receiving an acknowledgment from the destination host.
  • The sending host reduces the number of bytes it sends before receiving an acknowledgment from the destination host.

Explanation: When a sending host senses congestion, it reduces the number of bytes it sends before receiving an acknowledgment from the destination host.

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