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A. A-1, B-2, C-3, D-4
B. A-4, B-3, C-1, D-2
C. A-3, B-4, C-2, D-1
D. A-2, B-1, C-4, D-3

B. A-4, B-3, C-1, D-2

Protocol	Purpose
A. FTP	1. Retrieves and manages emails stored on a mail server
B. SMTP	2. Secure version of HTTP used for encrypted communication
C. IMAP	3. Sends emails across the Internet
D. HTTPS	4. Transfers files between computers over the Internet