Here is a ping short cut. It probably the fastest way to check for Internet access. This is also a CloudFlare DNS resolver.

$ ping 1.1

Pinging 1.0.0.1 with 32 bytes of data:

Reply from 1.0.0.1: bytes=32 time=17ms TTL=55

For IPv6, you can use:

$ ping6 2600::

Interestingly enough, these are also pingable:

$ ping 1234567890

Pinging 73.150.2.210 with 32 bytes of data:

$ ping 987654321

Pinging 58.222.104.177 with 32 bytes of data: