Internet / Network Protocols

Question 1

HTTP - Hypertext Transfer Protocol

Answer 1

Defines how webpages are
transferred from server to the client. The HTTP will make a request to the IP and the server responds with a webpage. There are 8 different HTTP commands
including GET, POST and
CONNECT*

Question 2

HTTPS - Secure Hypertext Transfer Protocol

Answer 2

Connects via a different port and encrypts the data

between the HTTP and the TCP protocols.

Question 3

FTP - File Transfer Protocol

Answer 3

The protocol used to download and upload files. Most modern browsers have built in FTP

Question 4

POP3 - Post Office Protocol 3

Answer 4

Allows emails to be received from a server. The protocol connects to the email server, downloads a local copy then deletes them from the server.

Question 5

SMTP - Simple Mail Transfer Protocol

Answer 5

Used for sending emails

Question 6

CSMA/CA - (Carrier Sense Multiple Access with Collision Avoidance)

Answer 6

Is a transmission protocol that prevents packet collisions. Once it receives a packet, it checks whether the channel is clear, if it is not available it will generate a random wait time, when it will check again. If a packet is larger than the permitted size is needed to be sent, a hands hake needs to
occur first - the RTS/CTS
(Request to Send/Clear to Send) protocol. This protocol only occurs when the packet is larger than the threshold.