Can bridge connect two different networks?

Could you please clarify, does a bridge have the capability to seamlessly connect two distinct networks? I'm particularly interested in understanding how this linkage works, given the potential complexities and differences that may exist between the two networks. Could you elaborate on the technical aspects involved, as well as any potential challenges or limitations that might arise in such a connection? I'm eager to learn more about how bridges facilitate communication and interoperability between different systems in the world of cryptocurrencies and finance.