Design and describe an application-level protocol to be used between an automatic teller machine (ATM) and a bank's centralized computer. a) Your protocol should allow a user's card and password to be verified, the account balance (maintained at the centralized computer) to be queried, and an account withdrawal to be made. Your protocol entities should be able to handle the all- too-common case in which there INSUFFICIENT BALANCE on the account to cover the withdrawal. Specify your protocol by listing the messages exchanged and the action taken by the ATM or the bank's centralized computer on transmission and receipt of messages. b) Sketch the operation of your protocol for the case of a simple withdrawal with no errors, using a diagram similar to that in Figure 1 below. c) Explicitly state the assumptions made by your protocol about the underlying end-to-end transport service. Page 4 of 5 Р. Т.О TCP connection request Hi Hi TCP connection reply GET http://www.awl.com/kurose-ross Got the time? 2:00 Time Time Time Time Figure 1: A human protocol and a computer network protocol
Design and describe an application-level protocol to be used between an automatic teller machine (ATM) and a bank's centralized computer. a) Your protocol should allow a user's card and password to be verified, the account balance (maintained at the centralized computer) to be queried, and an account withdrawal to be made. Your protocol entities should be able to handle the all- too-common case in which there INSUFFICIENT BALANCE on the account to cover the withdrawal. Specify your protocol by listing the messages exchanged and the action taken by the ATM or the bank's centralized computer on transmission and receipt of messages. b) Sketch the operation of your protocol for the case of a simple withdrawal with no errors, using a diagram similar to that in Figure 1 below. c) Explicitly state the assumptions made by your protocol about the underlying end-to-end transport service. Page 4 of 5 Р. Т.О TCP connection request Hi Hi TCP connection reply GET http://www.awl.com/kurose-ross Got the time? 2:00 Time Time Time Time Figure 1: A human protocol and a computer network protocol
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
![Design and describe an application-level protocol to be used between an automatic
teller machine (ATM) and a bank's centralized computer.
a) Your protocol should allow a user's card and password to be verified, the account
balance (maintained at the centralized computer) to be queried, and an account
withdrawal to be made. Your protocol entities should be able to handle the all-
too-common case in which there is INSUFFICIENT BALANCE on the account to
cover the withdrawal. Specify your protocol by listing the messages exchanged
and the action taken by the ATM or the bank's centralized computer on
transmission and receipt of messages.
b) Sketch the operation of your protocol for the case of a simple withdrawal with
no errors, using a diagram similar to that in Figure 1 below.
c) Explicitly state the assumptions made by your protocol about the underlying
end-to-end transport service.
Page 4 of 5
Р. Т.О
TCP connection request
Hi
Hi
TCP connection reply
GET http://www.awl.com/kurose-ross
Got the time?
2:00
<file>
Time
Time
Time
Time
Figure 1: A human protocol and a computer network protocol](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F29632c68-4fef-4311-bcec-2264a211f961%2F46d6544c-a43d-4de4-9a0d-86c452397c43%2Fhcdd1eq_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Design and describe an application-level protocol to be used between an automatic
teller machine (ATM) and a bank's centralized computer.
a) Your protocol should allow a user's card and password to be verified, the account
balance (maintained at the centralized computer) to be queried, and an account
withdrawal to be made. Your protocol entities should be able to handle the all-
too-common case in which there is INSUFFICIENT BALANCE on the account to
cover the withdrawal. Specify your protocol by listing the messages exchanged
and the action taken by the ATM or the bank's centralized computer on
transmission and receipt of messages.
b) Sketch the operation of your protocol for the case of a simple withdrawal with
no errors, using a diagram similar to that in Figure 1 below.
c) Explicitly state the assumptions made by your protocol about the underlying
end-to-end transport service.
Page 4 of 5
Р. Т.О
TCP connection request
Hi
Hi
TCP connection reply
GET http://www.awl.com/kurose-ross
Got the time?
2:00
<file>
Time
Time
Time
Time
Figure 1: A human protocol and a computer network protocol
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