CCNA 4 Chapter 4 Question and Answer
(Total 23 Question and Answer)
1.
Which two statements are true regarding network security? (Choose two.)
Securing
a network against internal threats is a lower priority because company
employees represent a low security risk.
Both
experienced hackers who are capable of writing their own exploit code and
inexperienced individuals who download exploits from the Internet pose a
serious threat to network security.
Assuming
a company locates its web server outside the firewall and has adequate backups
of the web server, no further security measures are needed to protect the web
server because no harm can come from it being hacked.
Established
network operating systems like UNIX and network protocols like TCP/IP can be
used with their default settings because they have no inherent security
weaknesses.
Protecting
network devices from physical damage caused by water or electricity is a
necessary part of the security policy.
2.
Which two statements are true about network attacks? (Choose two.)
Strong
network passwords mitigate most DoS attacks.
Worms
require human interaction to spread, viruses do not.
Reconnaissance
attacks are always electronic in nature, such as ping sweeps or port scans.
A brute-force attack searches to
try every possible password from a combination of characters.
Devices
in the DMZ should not be fully trusted by internal devices, and communication
between the DMZ and internal devices should be authenticated to prevent attacks
such as port redirection.
