How does flickr know my pictures are taken with my n95?

I have recently put some pictures on flickr, and i looked at them and at the side it says that they were taken with a Nokia N95, which they were, but how did it know?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).