Question: ss Alice's Bob's mail server mail server Alice's agent Bob's agent Key: Message queue User mailbox Use the above picture for the next 3 questions

Alice's Bob's mail server mail server Alice's agent Bob's agent Key: Message queue User mailbox Use the above picture for the next 3 questions Question 5 2 pts What possible protocols can Bob use in step 6 (pick all that apply)? O VPN O POP3 O SNMP O HTTP O IMAP O FTP Question 6 2 pts What application protocol (layer 5) is used in step 4? O SMTP O FTP O TCP O UDP Question 7 2 pts What Transport Layer protocol (layer 4) is being used in step 4? O SMTP O TCP O UDP O FTP

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