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Suppose a packet that is transmitted across the internet contains the following information (from left to right):

Bits 1-4: Packet sequence number within the message.
Bits 5-8: Total number of packets in the message.
Bits 9-16: Number identifying the sender.
Bits 17-24: Number identifying the receiver.
Bits 25-64: Part of the actual message being sent.

Here is one of the packets being sent over the internet:
01111011 10000001 11001110 01010110 00111100 10011100 11100010 10001111

Which of the following statements about this packet is true? Select one answer

A)This is packet 1 out of 8 total packets in the message.
B)This is packet 7 out of 11 total packets in the message.
C)This is packet 14 out of 22 total packets in the message.
D)This is packet 123 out of 129 total packets in the message.

User Statey
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1 Answer

4 votes

Answer:

The correct answer is C.

The packet sequence number is stored in bits 1-4, which in this case is 10011100. This is equal to 23 in decimal.

The total number of packets in the message is stored in bits 5-8, which in this case is 01010110. This is equal to 22 in decimal.

Therefore, this is packet 23 out of 22 total packets in the message.

* * *

Here is a breakdown of the bits in the packet:

```

Bits | Description

------- | --------

1-4 | Packet sequence number

5-8 | Total number of packets in the message

9-16 | Sender ID

17-24 | Receiver ID

25-64 | Message data

`

User Steveng
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