The most secure cable is fiber cables, it is slightly more expensive than copper, since we need both we would use fiber cables. Wireless is .. well not a cable.

Annual Rate of Occurrence (ARO) – How often will this happen each year?

Referential integrity: When every foreign key in a secondary table matches a primary key in the parent table. It is broken if not all foreign keys match the primary key. Semantic integrity: Each attribute value is consistent with the attribute data type. Entity integrity: Each tuple (row) has a unique primary value that is not null.