Reliable data transfer - transport layer, Computer Networking

Reliable Data Transfer

Figure illustrate the  framework for reliable  transfer. The service  abstraction provided  to the upper  layer  entities is that  of a reliable channel  through  which data  can be  transferred. With a reliable channel  no transferred data  bits  are corrupted ( flipped  from o to 1or  vice  versa)  or lost  and all are  delivered in the order  in which  they  were  sent. This is  precisely the service model  offered by TCP  to the internet application that invoke it.

1250_Reliable Data Transfer.PNG

 

                                                Figure Reliable data transfer: Service model service implementation

It is  the responsibility  of a reliable  data transfer  protocol to implement  this servers  abstraction. This task  is made  difficult by the fact that the  layer below the  reliable data  transfer protocol  may be unreliable. For example  IP is a reliable data  transfer  protocols  that is  implemented on top of  an unreliable IP  end to end network  layer.

In this section we will incrementally develop the sender  and receiver sides of a reliable  data  transfer  protocols, considering  increasingly  complex models  of the  underlying  channel. Figure illustrates the interfaces for our  data transfer protocols.

a.When the  application wants  to send data, it  calls  rdit send  to activate teh transport  protocols.

b.The transport  protocols  builds a packet  and cells  udt send to send to  packet  over the lower  layer.

c.On the  receiving  side  when the  lower  layer  protocols has a packet  to deliver  it calls  rdt rcv .

d.The transport  protocols  extracts the data from  teh packet  and delivers the data  to the  applications  by calling  deliver  data.

e.This protocols  is called rdt 1.0.

Posted Date: 3/11/2013 5:59:35 AM | Location : United States







Related Discussions:- Reliable data transfer - transport layer, Assignment Help, Ask Question on Reliable data transfer - transport layer, Get Answer, Expert's Help, Reliable data transfer - transport layer Discussions

Write discussion on Reliable data transfer - transport layer
Your posts are moderated
Related Questions
The table below gives a summary of special IP addresses.

Access Networks and Physical Media Access  networks  are the  physical  links(S) that connect  an end  systems to its edge  router. Which  is the  first router on a path  fr

what is dce

What are the data units at different layers of the TCP / IP protocol suite? The data unit formed at the application layer is known as a message, at the transport layer the data

Give the Description of security tools Software are coming up in which the user can select the kind of security measure required to be taken for encryption. One such example is

Define the uses of Intranet Intranet can largely eliminate paper-based documents, which otherwise become outdated over passage of time. Increased communication will also lead t

configure a router . get the default gateway


Q. Flow control in TCP? The amount of data a source is able to send before receiving an ACK from the destination Whether to send 1 byte of data as well as wait for ACK

SONET STS SONET defines a hierarchy of signalling levels called as STSs (Synchronous Transport Signals). Every STS level supports a certain data rate specified in megabits p