NewResolver creates a new Resolver instance with the specified options.

WithDefaultResolver is an option that specifies the default basic resolver, which resolves any TLD that doesn't have a custom resolver.

WithDomainResolver specifies a custom resolver for a domain/TLD.

Resolver is an object capable of resolving dns multiaddrs by using one or more BasicResolvers; it supports custom per domain/TLD resolvers.

BasicResolver is a low level interface for DNS resolution.