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. (c) Explicitly state the assumptions made by your protocol about the underlying end-to-end transport service.
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.
(c) Explicitly state the assumptions made by your protocol about the underlying end-to-end transport service.
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