The different Gateways for biometric are as following:
Transaction security: this is to secure customers transactions and so to protect their privacy both remotely and onsite.
Network security: this is to give a proper security to the infrastructure of the bank. This controls the specific activities or job functions access for the bank.
Access Control: this the security to vaults, deposit boxes etc.
Background Checks: This protects the internal fraud and illegal transactions with applicant background checks.