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Answer:

The answer is "Option A and Option B"

Explanation:

SMTP stands for simple mail transfer protocol and POP3 stands for post office protocol 3. both protocol use in Standard email protocols are SMTP and POP3. This also applies to a smartphone. You need only POP3 and SMTP information together with specific ports to connect to an email server. and other options are wrong that can be described as follows:

  • In option C, HTTP protocol is used in WWW, that's why it is not used in the email server.
  • In option D, The SNTP protocol is used in network clocks synchronization, that's why it is not correct.
  • In option E, ICMP protocol provides supports for messaging, that's why it is not correct.

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