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Explain what the number 0 and the number 255 are used for in IPv4 addressing?
Number 0 is used at the end of an IPv4 address for network identifiers and number 255 is used at end of an IPv4 for broadcast addresses.
What is an unlikely primary key?
A first name, a surname, a date of birth, and an address are just some examples of fields that would not be used as primary keys. Lots of people will have the same name or same date of birth and you could have people in your database that are living at the same address, so they are likely to be duplicated and so none of those fields should be used as primary key fields.
What is an example for address line 1 and 2?
IT MEANS the address of somewhere
What does 127.0.0.1 represent?
127.0.0.1 is the standard IP address used for a loopback network connection.This means that if you try to connect to 127.0.0.1, you are immediately looped back to your own machine.
What is 192 168 0 4 mean?
It is an IP address (address of a computer, router or some device) in local area network.
