Protocols and Layers

Question 1

What Protocol is used for webpage requests?

Answer 1

HTTP / HTTPS (Hypertext Transfer Protocol)

Question 2

What Protocol is used to communicate over LANs and WANs?

Answer 2

TCP/IP (Transmission Control Protocol / Internet Protocol)

Question 3

What Protocol is used for file transfers?

Answer 3

FTP / FTPS (File Transfer Protocol)

Question 4

What Protocol is used for receiving e-mail? (Downloads e-mail from server to your device and deletes it from the server)

Answer 4

POP (Post Office Protocol)

Question 5

What Protocol is used for receiving e-mail? (Keeps e-mail on server)

Answer 5

IMAP (Internet Message Access Protocol)

Question 6

What Protocol transfers outgoing emails from one server to another? (from an email client to a server)

Answer 6

SMTP (Simple Mail Transfer Protocol)

Question 7

What is the main difference between POP and IMAP?

Answer 7

POP - email on only one device as it is deleted from the server.
IMAP - each device syncs to server so your mail can be on multiple devices.

Question 8

What does the Application Layer do?

Answer 8

Encodes / Decodes the message so that it is understood by the sender and the recipient devices

Question 9

What does the Transport Layer do?

Answer 9

Breaks down the message into packets to ensure reliable data

Question 10

What does the Internet Layer do?

Answer 10

Adds the sender’s IP address and that of the recipient

Question 11

What does the Link Layer do?

Answer 11

Enables physical transfer of packets between nodes on a network