Why does every device connected to the internet need an IP address?
So data can be sent to the correct device
An IPv4 address is written as four numbers separated by dots. What is the range of each of these numbers?
0 to 255
How is an IPv6 address different from an IPv4 address?
It is 128 bits long and written in hexadecimal
A user types a web address into a browser. What is the role of a DNS server?
It translates the domain name into an IP address
What is the main job of a router in a network?
To forward packets towards their destination address
Packets from a single file often arrive at the destination out of order. Why is this?
Different packets can travel along different routes
A student uses a laptop at home, then takes it on holiday and connects it to a different network. What happens to the laptop's IP address?
It is given a new IP address by the new network
What is meant by an IP address?
A number given to a device on a network so that data can be sent to and from it
Which term describes a device that forwards packets between networks so that data reaches the correct destination?
Router
What is meant by packet switching?
Data is split into packets that may take different routes and are put back in order at the destination
What is meant by a dynamic IP address?
An address that can change each time a device reconnects to the internet
What is the name for a word or phrase used to refer to an IP address so that users do not have to type the numbers?
Domain name
A file is split into packets before being sent across the internet. Which piece of information in each packet header allows the receiving device to put the packets back into the correct order?
The sequence number of the packet
A packet arrives at the receiving device but the error checking data shows that it was corrupted on the way. What happens next?
The packet is requested to be sent again
A DNS server receives a request for a web address that is not in its own database. What does it do?
It passes the request on to another DNS server
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