Internet.2

Set of rules governing data communication.

HTTP - Internet Internet Protocol - Internet Ip Address - Internet Protocol Address

Yes.

Four bit numbers separated by dots. 128-bit numbers represented in hex.

When you make a telephone call, a dedicated connection is set up between you and the person you are calling for the duration of the call – this is circuit switching. Although it works fine for phone calls, it isn’t big enough to handle billions of people sending data.

Packet Switching is the process of breaking up the overall file into a number of individual packets of the same size, the size of which is determined by the protocol being used.

Part of packet, contains IP address of destination and IP address of the source, sequence number of packet, number of packets and error checking data.

Hop

No, all the same.

The packets may flow through the internet at different speeds.

Domain names.

Name used to refer to an IP address.

Translates web address into an IP address.

Hard to remember. Have to change if you change server.

If you use a laptop at home, its IP Address is the only one belonging to the router at home. But if you take a laptop on holiday your laptop will be assigned to a new IP Address. Many home IP addresses will change when the routers reconnects to the internet. This is known as a dynamic IP Address.

Media Access control

Assigned to network interface card by manufacturer.

Each NIC has a unique MAC address.

Yes, if it has ethernet and wifi connection.

Yes.

When you request a web page, each router along the way uses the MAC address of the next router to send the packet on the next leg of its journey.