Data Transmission Protocols

An organisation wants to take online payments through its website. Which of the following protocols might be used for this?

• RTCP

• SET

• HTTPS

• FTP

Answer explanation

HTTPS is used in secure payment systems to transmit bank details securely to the retailer. SET is a secure protocol for processing the transaction with the purchasers bank.

With VoIP software, what protocol is used to establish the connection between sender & receiver?

• SIP

• RTCP

• RTP

• SET

Answer explanation

The Session Initiation Protocol (SIP) is used to establish the connection in modern VoIP applications.

With VoIP software, what protocol is used to actually transmit the data packets?

• SIP

• RTP

• RTCP

• SET

Answer explanation

The Real-Time Transport Protocol is used to actually transmit the data packets along the connection that is established using SIP.

Jamie is setting up his email client so that he can send and receive emails. However he wants to be able to receive his emails on multiple devices. What protocols will he use?

• SMTP

• RTP

• POP3

• IMAP

Answer explanation

We use the SMTP protocol for sending emails regardless. But when we want to receive emails on multiple devices we would use IMAP rather than POP3.

FTP establishes two connections. What is the name of the first connection it establishes?

• File Connection

• Data Connection

• Initial Connection

• Control Connection

Answer explanation

This first connection is called the control connection. This is used to administrate the connections and to send commands. The second connection is the data connection which is used to transfer files between the client and server.

With HTTP a single HTTP message will contain all files associated with a web page (e.g. HTML, CSS, images).

• TRUE

• FALSE

Answer explanation

The first message received will contain the HTML file but additional messages will need to be exchanged to receive the additional files.

Jodie is purchasing a new game online. Her bank uses the 3D secure protocol. With 3D secure what two pieces of information is sent to the retailers bank to complete the transaction?

• • Sort Code

• • Bank Authentication

• • Bank Password

• • Card Details

Answer explanation

The authentication and card details are sent to the retailers bank so they can complete the transaction.