For each of the tools:

1) Provide the description

2) Discuss its importance

3) Give the advantages (2) and disadvantages (2)

4) Explain why organizations need to implement it

5) Explain what will happen if it is not configured/set up properly.

Descriptions:

NAT

- Stands for Network Address Translation

- Its job is to hide the IP Address when to connect to the Internet

DMZ

- Stands for Demilitarized Zone

- Its job is to securing the internet

- It will block the hackers to access the server or internet

Firewall

- A part of computer system or network, that is designed to block the unauthorized access, while permitting outward communication

Importance:

NAT

It conserves the number of public addresses used within an organization, and it allows for stricter control of access to resources on both sides of the firewall.

DMZ

 to provide another layer of security for a local area network (LAN). If a rogue actor is able to obtain access to services located in the DMZ, they are not able to gain full access to the main part of the network.

Firewall

protects your computer from being attacked over the internet by hackers, viruses, and worms

Advantages and disadvantages:

NAT

Advantages: 

1.Reuse of private IP addresses

2. Enhancing security for private networks by keeping internal addressing private from the external network

3. Connecting a large number of hosts to the global Internet using a smaller number of public (external) IP address, thereby conserving IP address space

You help in conserving the IPv4 address space (when you use NAT Overload)

Disadvantages:

1. Because many applications and protocols depend on end-to-end functionality, your network may not be able to use some of them. As we already told you, hosts inside a NAT network are not reachable by hosts in other networks.

2. End-to-end IP traceability is also lost. If you need to troubleshoot your network from a remote site, you will find troubleshooting more difficult and sometimes even impossible.

DMZ

Advantages:

1. Increase the security of our network

2. Allows you to expose your network publically

Disadvantages:

1. Requires maintenance and proper knowledge to employ, depending on the size and importance of the network.

2. if hackers are able to penetrate your firewall, they will have access to both the DMZ and the internal network.

Firewall

Advantages:

1. A firewall blocks "evil packets" from being "permitted to reach a place where they can do harm.

2. It provides good traffic management.

Disadvantages:

1. Packet filtering by a software firewall can degrade your system's performance, because it's a demanding task to examine every packet of data. 

2. A hardware firewall eases this burden.

Explain why organizations need to implement it

Explain what will happen if it is not configured/set up properly

References:

Internet, T. and Translation, N. (2019). What is Network Address Translation (NAT)?. [online] WhatIsMyIPAddress.com. Available at: https://whatismyipaddress.com/nat [Accessed 13 May 2019].

Idc-online.com. (2019). [online] Available at: http://www.idc-online.com/technical_references/pdfs/data_communications/DMZ.pdf [Accessed 13 May 2019].