On Linux, LOMAC is implemented as:

A.
Virtual addresses

B.
Registers

C.
Kernel built in functions

D.
Loadable kernel module

Explanation:

LOMAC is a security enhancement for Linux that uses Low Water-Mark Mandatory Access Control to
protect the integrity of processes and data from viruses, Trojan horses, malicious remote users and
compromised root daemons. LOMAC is implemented as a loadable kernel module – no kernel
recompilations or changes to existing applications are required. Although not all the planned
features are currently implemented, it presently provides sufficient protection to thwart scriptkiddies, and is stable enough for everyday use.
“Security Kernel – The hardware, firmware, and software elements of a trusted computing base (TCB)
that implements the reference monitor concept. It must mediate all accesses between subjects and
objects, be protected from modification, and be verifiable as correct.” – Shon Harris All-in-one CISSP
Certification Guide pg 355