Match each characteristic to the appropriate email protocol. (Not all options are used.)

Both POP and IMAP are used to retrieve email messages. SMTP is the default protocol used to send email. However, POP does not store messages and automatically deletes them as they are downloaded. A large business or ISP would prefer this, not a small business. It is the responsibility of the client to store and organize messages. IMAP requires a centralized backup because it stores all messages until they are manually deleted. This means that more disk space must be allocated to IMAP.