Chainlink is the best, but not cheap. Those square 2" square welded mesh sheets are also sturdy enough, but also expensive.
The cheaper the wire netting, the weaker it is.
You can get those reasonably priced small electric fence units that are designed for small holdings. They run on batteries so no power problem. You can run a live wire line 3' high, 6" away from the sides, that will tickle reynard. Be careful yourself, eventhough it runs on batteries, it will give you a surprisingly powerful 'handshake'.