Think of the network connection diagrams that show lines at each level of
the IOS model connecting the hosts at each end. Layer 4 TCP at host A is
talking to layer 4 TCP at host B. If layer 3 IP messes up then it is up to
TCP to detect the error and notify the other end to retransmit.
Each layer has a job to do. Layer 3 routes the packet to its destination.
Layer 4 TCP makes sure that the data arrived.
The standard texts on TCP/IP are:
Internetworking with TCP/IP Vol 1 by Douglas Comer
TCP/IP Illustrated Vol I, The Protocols by W. Richard Stevens.
> -----Original Message-----
> From: Sammi [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, July 05, 2000 8:36 PM
> To: [EMAIL PROTECTED]
> Subject: TCP Methodology
>
>
> Given the following explanation:
>
> "TCP is a connection-oriented protocol that passes its data to IP,
> which is a connectionless one. TCP sets up a connection at both ends
> and guarantees reliable delivery of the full message sent. TCP tests
> for errors and requests retransmission if necessary, because IP does
> not."
>
> Could someone please explain the interaction between TCP and IP. To my
> understanding TCP is used on the client side and within the LAN. When
> data is to transverse the internet or onto a WAN the data is taken
> over by IP.
> The statement above says TCP establishes connections on both ends as
> per a connection-oriented protocol. Yet IP has control of the data. If
> a virtual connection is made between source and destination, why is a
> connectionless route used for packets? Is the TCP connection for error
> and/or confirmation purposes only? Or perhaps TCP monitors the portal
> to the WAN waiting for error messages/acknowledgements?
>
> If someone could clarify this interaction and hand off I would
> appreciate it. Of course a link to reading material on this specific
> issue would also suffice.
>
> As always, thanks for your help.
>
> ___________________________________
> UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
> FAQ, list archives, and subscription info: http://www.groupstudy.com
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
___________________________________
UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html
FAQ, list archives, and subscription info: http://www.groupstudy.com
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
