How to check if node is on TestNet or MainNet via `bitcoin-cli`? Is there a way, by using bitcoin-cli using RPC querying, if the node I'm querying is running on MainNet or TestNet?

Thanks
Before version 0.16.0:


$ bitcoin-cli getinfo
{
  "version": 120100,
  "protocolversion": 70012,
  "walletversion": 60000,
  "balance": 0.00000000,
  "blocks": 414105,
  "timeoffset": -165,
  "connections": 9,
  "proxy": "",
  "difficulty": 199312067531.243,
  "testnet": false,
  "keypoololdest": 1466689642,
  "keypoolsize": 101,
  "paytxfee": 0.00000000,
  "relayfee": 0.00001000,
  "errors": ""
}