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Plant Security
Published in Frank R. Spellman, Fundamentals of Public Utilities Management, 2020
A firewall is an electronic barrier designed to keep computer hackers, intruders, or insiders from accessing specific data files and information on a utility’s computer network or other electronic/computer systems. Firewalls operate by evaluating and then filtering information coming through a public network (such as the Internet) into the utility’s computer or other electronic system. This evaluation can include identifying the source or destination addresses and ports, and allowing or denying access based on this identification. Two methods are used by firewalls to limit access to the utility’s computers or other electronic systems from the public network: The firewall may deny all traffic unless it meets certain criteria.The firewall may allow all traffic through unless it meets certain criteria.
Plant Security
Published in Frank R. Spellman, Handbook of Water and Wastewater Treatment Plant Operations, 2020
A firewall is an electronic barrier designed to keep computer hackers, intruders, or insiders from accessing specific data files and information on a utility’s computer network or other electronic/computer systems. Firewalls operate by evaluating and then filtering information coming through a public network (such as the Internet) into the utility’s computer or other electronic system. This evaluation can include identifying the source or destination addresses and ports, and allowing or denying access based on this identification. Two methods are used by firewalls to limit access to the utility’s computers or other electronic systems from the public network: The firewall may deny all traffic unless it meets certain criteria.The firewall may allow all traffic through unless it meets certain criteria.
Information as Infrastructure
Published in Spiro N. Pollalis, Planning Sustainable Cities, 2016
An information network is the complete system of links used for the transmission and reception of all types of information and data distributed in a particular area. They serve computer and telephone connections using either cable or wireless media. Indicative network components include copper and coaxial cables, optical fibers, wireless radio frequencies/waves, and communication satellites. Depending on their area of coverage, computer networks are divided into wide area networks (WANs), metropolitan area networks (MANs), and local area networks (LANs). The most popular computer network is the internet, potentially connecting all humans worldwide. Telephone networks allow for call exchanges through landline or mobile connections.
Picture Fuzzy N-Soft Sets and Their Applications in Decision-Making Problems
Published in Fuzzy Information and Engineering, 2021
Ubaid Ur Rehman, Tahir Mahmood
The firewall refers to a security gateway that protects the computer networks from malicious instructions. There are several kinds of firewalls in the market and every firewall has its benefits and disbenefits. Therefore, how to select a beneficial firewall by seeing its effectiveness and precision is a conventional multi-attribute DM (MADM) problem.