Systems administrators should protect their most important systems by constantly applying the most recent patches. However, it is difficult to patch all hosts in a network because patches are released at a very fast pace. Focus on patching the most important hosts and then implement the other security solutions mentioned below. Patches usually must be obtained from software vendors. Virus Detection Virus-checking programs are indispensable to any network security solution.
Virus checkers monitor computers and look for malicious code.
One problem with virus checkers is that one must install them on all computers for maximum effectiveness. It is time-consuming to install the software and requires updating monthly for maximum effectiveness. Users can be trained to perform these updates but they can not be relied upon. This way, the majority of viruses are stopped before ever reaching the users. Firewalls Firewalls are the single most important security solution for protecting one's network.