FUNDAMENTALS OF COMPUTER

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COMPUTER THREATS SECURITY

WHAT IS A FIREWALL IN NETWORK SECURITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
With respect to the DMZ, from the English term “DeMilitarized Zone”, that is, “Zona Demilitarizada” consider: I. Its function is to keep services that have external access separate from the local network, restricting to the maximum a potential damage caused by an intruder, both internal and external.II. Allows external users access to specific servers located in the perimeter network, as well as their access to the internal corporate network.III. Its main role is to be a “buffer” network between the external and internal networks.IV. The configuration is carried out through the use of Firewall equipment, which will carry out the access control between it, the local network and the Internet.
A
I and III.
B
II.
C
I, III and IV.
D
II, III and IV.
E
I and II.
Explanation: 

Detailed explanation-1: -DMZs function as a buffer zone between the public internet and the private network. The DMZ subnet is deployed between two firewalls. All inbound network packets are then screened using a firewall or other security appliance before they arrive at the servers hosted in the DMZ.

Detailed explanation-2: -The ultimate goal of a DMZ is to allow access to resources from untrusted networks while keeping the private network secured. Resources commonly placed in the DMZ include, Web servers, Mail servers, FTP servers, and VoIP servers.

Detailed explanation-3: -A demilitarized zone (DMZ or DZ) is an area in which treaties or agreements between nations, military powers or contending groups forbid military installations, activities, or personnel.

Detailed explanation-4: -A DMZ provides an organization with an additional level of protection between an organization’s internal network and the public Internet. By isolating potentially vulnerable systems on a DMZ, an organization decreases risk to its internal systems.

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