What's the difference between a ccTLD and a gTLD?

A gTLD is a generic Top Level Domain. These are top level domains that are NOT affiliated with any country and can be registered by anyone for a fee. Currently, these are .com, .net, and .org. ccTLDs are Country Code Top Level Domains i.e .In, .in.co.These are the two character top level domain names affiliated with various countries around the world. Many ccTLDs are closed or restricted, requiring proof of residency in the country in question. Others are not restricted, and can be purchased much like gTLDs.