IT Services Overview
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Questions and Answers

What is the purpose of the Mail Delivery Agent (MDA) in the email delivery process?

It is the final agent before the email is delivered to the recipient's SMTP server.

What happens when the domain names are different during the SMTP relay process?

MTAs query the Domain Name System (DNS) records to find the IP address for the recipient's domain.

What is the purpose of the HELO command in the SMTP handshake?

It is used by the client to identify itself to the SMTP server.

What is the purpose of the QUIT command in the SMTP session?

<p>It is used by the client to initiate the termination of the SMTP connection.</p> Signup and view all the answers

What is the purpose of the SMTP queue?

<p>It is a set of emails that are waiting to be delivered.</p> Signup and view all the answers

What is the purpose of the MAIL FROM command in the email transfer stage?

<p>It specifies the sender's email address.</p> Signup and view all the answers

What are the main IT tasks that appear in many levels of a company?

<p>Planning, Installing, Development, Monitoring, Maintenance, Support</p> Signup and view all the answers

What are the three most popular MTAs (Mail Transfer Agents) mentioned in the text?

<p>Sendmail, Postfix, and Exim</p> Signup and view all the answers

What is the primary function of an MSA (Mail Submission Agent)?

<p>Receives emails from the email client, checks its headers, and verifies that the addresses are indicated correctly</p> Signup and view all the answers

What is the main difference between a Mail User Agent (MUA) and a Mail Transfer Agent (MTA)?

<p>MUA is an application or website used to send and receive email messages, while MTA is a send mail program that processes and transfers emails</p> Signup and view all the answers

What is the implication of a service needing to 'buy a lot and rent' in terms of scalability and reliability?

<p>It implies that the service needs to be scalable and reliable, and using cloud services like Amazon can provide an easier and more efficient way to achieve this</p> Signup and view all the answers

What is the potential consequence of a security failure in an IT service?

<p>Update and security failures can lead to potential problems, including data loss and system downtime</p> Signup and view all the answers

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