Data Packets

The components of a packet are...

• Header, Payload, Footer

• Head, Middle, End

• Header, data, Footer

• Head, data, Tail

The header in a packet contains which one or more of the following?

• The IP address of the sender

• A portion of the original data

• The email address of the recipient

• The IP address of the recipient

The individual pieces of data are then sent using ......, which means that if one piece goes missing it can be resent or, if one piece takes a long time to arrive, other pieces can be sent via a different route.

• direct messaging

• circuit switching

• packet switching

True or False

Packet switching typically means that a collection of data arrives successfully at its destination more quickly than if packet switching is not used.

• True

• False

What is the role of a web server?

• To host web pages that can be accessed by other devices connected to the internet.

• To control which devices on a network are able to access the Internet.

• To request a specific web page from a web host and display the results.

• To allow the user to create their own web pages.

A .......... is used to reassemble data packets into a full message.

• IP address

• MAC address

• packet sequence number

• error-checking code

Which of these is NOT part of the header?

• Packet Number

• Sender IP Address

• Receiver IP Address

• Name of File

Which of these is NOT correct of packet switching?

• Messages cannot be easily intercepted

• Establishes a route on which to send data packets

• Packets need to be re-ordered

• Maximises the use of the network

What happens when the packet arrive at their destination? 

• The computer stores them all in a file as individual pieces
• They get put back together in the correct order

What happens if a packet is lost?

• They ring and ask if they have any spare packets 
• A message is sent back to the original computer to ask for a replacement packet