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I am reading Forouzan in that I have stuck here, I know that.

TCP is connection oriented service, means it all segments follow same path, and segments are in order delivered. But it says that TCP segments is encapsulated in IP packets and since IP is connection less services and its packet follow different path. How it is happening.

Consider this screen shot of Forouzan:-

Please explain the proper reason behind it.

3 Answers

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TCP is a connection oriented having three phase

(1)Connection establishment

(2)Data transfer

(3)Connection termination

After connection establishment resources are reserved only at the end system as routers don't have Transport layer. TCP/IP packet goes independently through the routers but destination have reserved resources.

Thats why TCP is a connection oriented protocol.
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TCP is connection oriented service it means there are some resources reserved..but there is no physical connection established between source and destination.
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TCP is connection oriented service, means it all segments follow same path  packets can go different route because it is virtual connection not a physical connection and it is true that the segments are in order delivered

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