R 2APPLICATION LAYERS: blah blah ..S:..blahS: .??c. Suppose you have configured your POP mail client to operate in thedownload-and-keep mode. Using your transcript in part (b), suppose youretrieve messages 1 and 2, exit POP, and then five minutes later you againaccess POP to retrieve new e-mail. Suppose that in the five-minute inter-val no new messages have been sent to you. Provide a transcript of thissecond POP session. PI7. Consider accessing your e-mail with POP3,a. Suppose you have configured your POP mail client to operate in thedownload-and-delete mode. Complete the following transaction:C: listS: 1 498S: 2 912S: .C: retr 1S: blah blahS:blahS:??b. Suppose you have configured your POP mail client to operate in thedownload-and-keep mode. Complete the following transaction:C: listS: 1 498S: 2 912S:C: retr 1

Post Office Protocol version 3 (POP3) is an mail protocol used to retrieve mail from a remote server…

Answered: APPLICATION LAYER S: blah blah S: .. S:…

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

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R 2
APPLICATION LAYER
S: blah blah ..
S:
..blah
S: .
?
?
c. Suppose you have configured your POP mail client to operate in the
download-and-keep mode. Using your transcript in part (b), suppose you
retrieve messages 1 and 2, exit POP, and then five minutes later you again
access POP to retrieve new e-mail. Suppose that in the five-minute inter-
val no new messages have been sent to you. Provide a transcript of this
second POP session.

PI7. Consider accessing your e-mail with POP3,
a. Suppose you have configured your POP mail client to operate in the
download-and-delete mode. Complete the following transaction:
C: list
S: 1 498
S: 2 912
S: .
C: retr 1
S: blah blah
S:
blah
S:
?
?
b. Suppose you have configured your POP mail client to operate in the
download-and-keep mode. Complete the following transaction:
C: list
S: 1 498
S: 2 912
S:
C: retr 1

Expert Solution

Explanation

Post Office Protocol version 3 (POP3) is an mail protocol used to retrieve mail from a remote server to a local email client. POP3 copies the mail from the remote server into the local mail client. Optionally, mail is deleted after it is downloaded from the server.
Post Office Protocol (POP) is a type of computer networking and Internet standard protocol that extracts and retrieves email from a remote mail server for access by the host machine. POP is an application layer protocol in the OSI model that provides end users the ability to fetch and receive email.

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