Answer:   When you create the assembly name in gacutil , that will be create the unique name where you can deploy in the Gac util . It will also help out it with two different version of assembly.

Answer:   A strong name consists of the assembly's identity—its simple text name, version number, and culture information (if provided)—plus a public key and a digital signature. It is generated from an assembly file using the corresponding private key. It gives a unique name to each assembly of various versions. This allows solving the DLL hell problem.