Complex sentence: Types 1 through 4 are defined in the National Information Assurance Glossary (CNSSI No.4009) which defines Type 1 and Type 2 products, and Type 3 and Type 4 algorithms.
Split into simpler sentences: Types 1 through 4 are defined in the National Information Assurance Glossary (CNSSI No.4009). This defines Type 1 and Type 2 products, and Type 3 and Type 4 algorithms.