What kind of fence posts for 6' chain link fencing please?

My daughter wants a 6' chain link fence around her back garden. There is already a 3' one with 3' concrete posts. Please can anyone tell me the best, easiest and cheapest way of erecting the new fence. I've seen concrete and wooden posts, but was thinking something more like the metal post you see in parks. Any suggestions please?

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…).