MTP a. What does SMTP stand for? b. What does the User Agent do? c. What User Agent do you use? d. Does the User Agent use SMTP? e. In the e-mail system architecture, which entities can use SMTP? The picture below shows the steps needed for Alice to send an email to Bob. 1 iser mail server mail server agent agent Alice s mail server Bob s mail server f. In which step (#1-6) are emails transmitted using SMTP? g in which 2 steps (#1-6) are the User Agents uploading or downloading email? h In which step is the email waiting in Bob's mailbox on his SMTP mail server? i. In which step is the email sent by Alice waiting in her mail server's queue? j. Why are we doing all of this? i.e. why is this architecture even necessary... can't your User Agent just transmit the email directly to the recipient