DQ2 - Reliable Data Transfer Protocols

This homework assignment analyzes the benefits of the RDT3 protocol compared to RDT1 and RDT2, discusses the need for timers in RDT3, and explores the possibility of data loss in this protocol. It provides a comprehensive analysis of reliable data transfer protocols, highlighting their key features and limitations.

DQ2

TABLE OF CONTENTS
QUESTION 1...................................................................................................................................1
Compare the benefits of the RDT3 protocol vs. RDT1 and RDT2........................................1
QUESTION 2...................................................................................................................................1
Discuss whether a timer is required for round-trip delay messages under protocol RDT3. . .1
QUESTION 3...................................................................................................................................2
Determine packet is mission-critical or whether it can be lost when using RDT3................2
REFERENCES................................................................................................................................4

QUESTION 1
Compare the benefits of the RDT3 protocol vs. RDT1 and RDT2
Reliable data transfer protocol provides the best services with no guarantee that data can
reached their destination or not. This data transfer protocol will help for providing the best
services to share information form one node to another (Jiang, 2018). It is important
characteristics of unreliable channel that will determine the complexity of data transfer protocol.
Comparison between Rdt1 , Rdt2 and Rdt3
RDT1 RDT2 RDT3
 It is reliable data
transfer form from
one channel to
another by using
network.
 There is no bit error
and no packet loss
in the system.
 RDT1 have separate
FSM for sender and
receiver.
 Receiver read all the
data from channel.
 Channel with the bit
errors.
 Sender
 In RDT2, there is some
error in signals, if
sending the messages
formfrom one place to
another.
 RDT2 has checksum to
detect the bit errors in
system.
 There is no duplication
of data and is delivered
in FIFO order.
 Reliable data transfer
3 is useful to deliver
the
acknowledgement
and data packet in a
proper manner.
 It is continuously
sending packets form
from one place to
another and it can
receive uncorrupted
packet.
 In RDT3, channel
can loss data in the
form of packets.
QUESTION 2
Discuss whether a timer is required for round-trip delay messages under protocol RDT3
In RDT3, Thethe round trip time is basically when the data from one device to another
and having receipts of its acknowledgement. Round trip timer is a major function in the RDT3
protocol (Montella, Ruggieri and Kosta,2018). This timer will is used for ensuring that data is
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delivered to their destinations. The round trip timer is useful for determininge retransmission
signals.
There are large number of traffic on network and this is a major problem. The round trip
timer showsn accurate value if the datagram areis lost in round trip (Computer Networking :
Principles, Protocols and Practice, 2018). This problem occurs in round trip and is also an
important consequence in the other reliable protocol.
QUESTION 3
Determine packet is mission-critical or whether it can be lost when using RDT3
Yes, data can be lost in RDT3 because it provides reliable data services to easily transmit
from one device to another. It uses the retransmission technique to deliver data packet by using
checksum, acknowledgement etc. Data packet is important part of network that transmits signals
from one device to another by using network (Xue and et.al, 2017). RDT3 is reliable network
which helps for delivering the data-packet form one network to another. RDT3 is based on
connection oriented service provided by RDT protocol and it is necessary to ensure that all data
packets delivered from sender side to receiver side. This protocol is design by using different
tool and platform to create an effective connection between client and server side.
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Figure1: Principles of Reliable Data Transfer
(Source: Principles of Reliable Data Transfer, 2018).
This diagram shows the data-packet transmitted from sender to receiver side. Receiver
response towards client side to acknowledge the data. At the end data can be lost. Afterwards, it
will use retransmission techniques that will transmit the signals form receiver side.
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REFERENCES
Books and journals:
Jiang, S., 2018. On reliable data transfer in underwater acoustic networks: a survey from
networking perspective. IEEE Communications Surveys & Tutorials. 20(2). pp.1036-
1055.
Montella, R., Ruggieri, M. and Kosta, S., 2018, April. A fast, secure, reliable, and resilient data
transfer framework for pervasive IoT applications. In IEEE INFOCOM 2018-IEEE
Conference on Computer Communications Workshops (INFOCOM WKSHPS) (pp. 710-
715). IEEE.
Xue, L., and et.al., 2017. Provable data transfer from provable data possession and deletion in
cloud storage. Computer Standards & Interfaces. 54. pp.46-54.
Online:
Principles of Reliable Data Transfer.2018. [Online]. Accessed through: <https://www.net.t-
labs.tu-berlin.de/teaching/computer_networking/03.04.htm>
Computer Networking: Principles, Protocols and Practice.2018. [Online]. Accessed through:
<http://cnp3book.info.ucl.ac.be/1st/html/transport/principles.html>
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