Which term describes the set of rules that allows devices to communicate over a network?
Protocol
What is meant by HTTPS?
A secure version of HTTP that encrypts data before it is sent
What is meant by the internet layer of the TCP/IP model?
The layer that routes packets between networks using their addresses
Desktop computers in a school office are connected to the network using copper cables. Which protocol is used for this connection?
Ethernet
What is the main purpose of the HTTP protocol?
Requesting and receiving web pages from a web server
An online shop asks customers to enter their bank card details. Why should the shop use HTTPS?
It encrypts the details so they cannot be read if intercepted
What is FTP used for on a network?
Sending and retrieving files to and from a server
An employee writes an email in their email program and clicks send. Which protocol sends the message to the mail server?
SMTP
A student wants to read their email on a phone, a laptop and a school computer and see the same messages on each device. Which protocol should be used?
IMAP
Which layer of the TCP/IP model is responsible for routing packets to their destination?
Internet layer
What does the transport layer do with data when a message is sent over a network?
It splits data into packets and joins them back together
Which list shows the four layers of the TCP/IP model in the correct order from top to bottom?
Application, transport, internet, link
A computer receives a data packet. Which layer removes the MAC address before passing the packet upwards?
Link layer
Which group of protocols all operate in the application layer of the TCP/IP model?
HTTP, FTP and SMTP
A packet is lost on its journey across a network. Which layer detects the error and resends the packet?
Transport layer
A company replaces its network routers with models from a different manufacturer. Why is this likely to work without changing the rest of the system?
Each layer is self-contained so it can be changed on its own
The transport layer divides a message into packets and gives each one a number. Why are these numbers added?
So the packets can be put back into the correct order
A tablet connects to a wireless access point so it can reach the school network. How is the data carried between the tablet and the access point?
As radio waves
A user has email set up on one laptop only. Each message is downloaded to the laptop and then deleted from the mail server. Which protocol is being used?
POP3
Which two protocols operate in the link layer of the TCP/IP model?
Ethernet and Wi-Fi
Why do all devices on a network need to use the same protocols?
So that each device can understand the data sent by the others
Which protocol divides a message into packets, reassembles them at the destination and resends any that are lost?
TCP
What is meant by the application layer?
The layer where applications such as web browsers and email clients create the data that is to be sent
A customer enters their bank card details on an online shop's payment page. Which protocol keeps these details secure while they are sent?
HTTPS
A student can read the same emails on a phone, a tablet and a school computer. Which email protocol allows this?
IMAP
A user has just downloaded all of their new emails using POP3. What has happened to those messages on the mail server?
They are removed from the server once they are downloaded
Which layer of the TCP/IP model adds the source and destination IP addresses to a packet?
Internet layer
Why is network communication divided into separate layers in the TCP/IP model?
So that changing one layer does not affect the others
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