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Basics of IP’sO You can think of an IP address as a
letter.O On the letter there will be an address
and postcodeO The postcode is a high precision
location system to identify houses in the UK (and world)
An IP addressO Every machine that needs to be
connected to the internet or on a network will be given an IP address
216.27.61.137
O To make it easier for us to read the address, they are broken up into 4 blocks.
Binary VersionO As computers deal in 1’s and 0’s the
IP address will look something like this:
11011000.00011011.00111101.10001001
Each block is a byte (8 bits), giving you 256 unique addresses per block. A block is called an octet
Reserved AddressesO Out of the 4,294,967,296 unique addresses
that you can have using IPv4 there are a couple of addresses that are unavailable to use publically.
O Broadcast address – 255.255.255.255O Network address – 0.0.0.0O Broadcast address is a way in which to
contact all of the computers in a groupO Network address is a default address that
scoops up any messages to an undefined IP