What is the difference between a junior olympic-sized pool and an olympic-sized pool?

How long are the lanes in a jr olympic-sized pool compared to the length in an olympic-sized pool? Are they the same? What's the difference between the two?

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…).