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Authors:
James F. Kurose, Keith W. Ross
Chapter:
The Network Layer
Exercise:
Review
Question:17 | ISBN:9780132856201 | Edition: 6

Question

Suppose Host A sends Host B a TCP segment encapsulated in an IP datagram. When Host B receives the datagram, how does the network layer in Host B know it should pass the segment (that is, the payload of the datagram) to TCP rather than to UDP or to something else?

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Answer

Consider data:

  • Suppose Host A sends Host B a TCP segment encapsulated in an IP datagram. That means, 8-bit field. 
  • If Host B receives the datagram, then encapsulated Host A sends a TCP segment. Then network layer transfer the data to TCP in the Host B.
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