Internet Communication ( 3 )

Question 1

What is FTP?

Answer 1

File transfer protocol, an application level protocol used to transfer data across a network.

Question 2

How does access work for FTP?

Answer 2

• usernames and passwords can be used to protect access to files and to identify users
• Access can be provided anonymously where any user can access the FTP site

Question 3

What is a mail server?

Answer 3

• Dedicated computers that are responsible for storing email, providing access to clients and services to send emails.
• Acts as a virtual postal office for all incoming/outgoing emails
• Route mail according to its database of local network user’s email addresses as it arrives and leaves, and stores it until it can be retrieved

Question 4

What protocols do mail servers use?

Answer 4

• SMTP
• POP3
• IMAP

Question 5

What is STMP?

Answer 5

Simple mail transfer protocol
• Used to transfer outgoing emails between mail servers to their destination or from an email client to the server when sending an email

Question 6

How does POP3 work?

Answer 6

• Downloads emails stored on a remote server to a local client
• Responsible for retrieving emails form a mail server that temporarily stores your incoming mail
• When emails are retrieved they are transferred to your local computer, and deleted from the server

Question 7

What is a disadvantage of POP3?

Answer 7

Emails are deleted, if you are using different devices to access email via POP3 they will not be synchronised on each device.

Question 8

What is IMAP?

Answer 8

• Email protocol that is designed to keep emails on the server, thus maintaining synchronicity between devices.
• Multiple clients can access the same email account in synchronicity
• Holds mail on the server