Nmap
Explanation:
Nmap is a free open-source utility for network exploration and security auditing. It is used to discover
computers and services on a computer network, thus creating a "map" of the network. Just like many simple
port scanners, Nmap is capable of discovering passive services. In addition, Nmap may be able to determine
various details about the remote computers. These include operating system, device type, uptime, software
product used to run a service, exact version number of that product, presence of some firewall techniques and,
on a local area network, even vendor of the remote network card. Nmap runs on Linux, Microsoft Windows,
etc.

A demilitarized zone (DMZ) is a physical or logical subnetwork that contains and exposes external services of
an organization to a larger network, usually the Internet. The purpose of a DMZ is to add an additional layer of
security to an organization's Local Area Network (LAN); an external attacker only has access to equipment in
the DMZ, rather than the whole of the network. Hosts in the DMZ have limited connectivity to specific hosts in
the internal network, though communication with other hosts in the DMZ and to the external network is allowed.
This allows hosts in the DMZ to provide services to both the internal and external networks, while an
intervening firewall controls the traffic between the DMZ servers and the internal network clients. In a DMZ
configuration, most computers on the LAN run behind a firewall connected to a public network such as the
Internet.

Web Application Security Consortium (WASC) is a worldwide organization that aims to establish, refine, and promote Internet security standards. WASC is vendor-neutral, although members may belong to corporations involved in the research, development, design, and distribution of Web security-related products.
Answer option A is incorrect. ANSI (American National Standards Institute) is the primary organization for fostering the development of technology standards in the United States. ANSI works with industry groups and is the U.S. member of the International Organization for Standardization (ISO) and the International Electro- technical Commission (IEC). Long-established computer standards from ANSI include the American Standard Code for Information Interchange (ASCII) and the Small Computer System Interface (SCSI).
Answer option D is incorrect. The International Telecommunication Union (ITU) is an organization established to standardize and regulate international radio and telecommunications. Its main tasks include standardization, allocation of the radio spectrum, and organizing interconnection arrangements between different countries to allow international phone calls. ITU sets standards for global telecom networks.
The ITU's telecommunications division (ITU-T) produces more than 200 standard recommendations each year in the converging areas of telecommunications, information technology, consumer electronics, broadcasting and multimedia communications. ITU was streamlined into the following three sectors:
ITU-D (Telecommunication Development)
ITU-R (Radio communication)
ITU-T (Telecommunication Standardization)
Answer option C is incorrect. The Institute of Electrical and Electronic Engineers (IEEE) is a society of technical professionals. It promotes the development and application of electro-technology and allied sciences. IEEE develops communications and network standards, among other activities. The organization publishes number of journals, has many local chapters, and societies in specialized areas.