Ch 09: Introduction to Network Security
46. How will advances in biometric authentication affect security?
As biometric authentication becomes more reliable and less expensive, using MFA will be
more common. Passwords are often considered a weak link in security systems because users
can write them down or tell other people, so biometric methods combined with some type of
smart card are likely to replace passwords in the future.
Setting Up Authentication and Authorization
47. What is the difference between an IDS and IPS?
An intrusion detection system (IDS) monitors network traffic for malicious packets or traffic
patterns and reports identified security breaches to a management station. A variation on an
IDS is an intrusion prevention system (IPS), which can take countermeasures if an attack is
in progress. These countermeasures include reconfiguring a firewall to prevent suspicious
packets from entering the network, resetting the connection between source and destination
devices, or even disabling the link between inside and outside networks.
Using Intrusion Detection and Prevention Systems
48. What is the difference between a virus and a worm?
Both a virus and a worm are self-replicating programs, but a virus attaches itself to another
program whereas a worm is a self-contained program, and unlike a virus, doesn’t require
another file to spread to other computers.
Protecting a Network from Malware
49. What is a penetration tester?
A penetration tester is a person who is skilled in the art of breaking into a network to find
where the network is vulnerable for the purposes of advising a company on how to be more