As part of a routine security audit for a financial institution, you identify a need to improve the control over user access to the institution's networked assets. The goal is to ensure that each user is verified before access is granted and that all user activity is recorded and reviewed. In addition to this, certain users must only gain access to systems relevant to their role within the institution. Which component should be implemented to best achieve these objectives?
DHCP server
Web application firewall
Syslog server
RADIUS server