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In this chapter, you learn about the following topics: Fundamental concepts in network security, including identification of common vulnerabilities and threats, and mitigation strategies Implementation of a security architecture using a lifecycle approach, including the phases of the process, their dependencies, and the importance of a sound security policy The open nature of the Internet makes it vital for businesses to pay attention to the security of their networks.
As companies move more of their business functions to the public network, they need to take precautions to ensure that the data cannot be compromised and that the data is not accessible to anyone who is not authorized to see it.
Unauthorized network access by an outside hacker or a disgruntled employee can cause damage or destruction to proprietary data, negatively affect company productivity, and impede the capability to compete.
Unauthorized network access can also harm relationships with customers and business partners, who might question the capability of a company to protect its confidential information.
Individuals and corporations benefit from the elastic deployment of services in the cloud, available at all times from any device, but these dramatic changes in the business services industry exacerbate the risks in protecting data and the entities using it individuals, businesses, governments, and so on.
To start on our network security quest, this chapter examines the need for security, looks at what you are trying to protect, and examines the different trends for attacks and protection and the principles of secure network design. These concepts are important not only for succeeding with the IINS exam, but they are fundamentals at all security endeavors on which you will be embarking.
Building Blocks of Information Security Establishing and maintaining a secure computing environment is increasingly more difficult as networks become increasingly interconnected and data flows ever more freely. In the commercial world, connectivity is no longer optional, and the possible risks of connectivity do not outweigh the benefits.
Therefore, it is very important to enable networks to support security services that provide adequate protection to companies that conduct business in a relatively open environment.
This section explains the breadth of assumptions and challenges to establish and maintain a secure network environment.
Basic Security Assumptions Several new assumptions have to be made about computer networks because of their evolution over the years: Modern networks are very large, very interconnected, and run both ubiquitous protocols such as IP and proprietary protocols.
Therefore, they are often open to access, and a potential attacker can with relative ease attach to, or remotely access, such networks.
Widespread IP internetworking increases the probability that more attacks will be carried out over large, heavily interconnected networks, such as the Internet.
Computer systems and applications that are attached to these networks are becoming increasingly complex. In terms of security, it becomes more difficult to analyze, secure, and properly test the security of the computer systems and applications; it is even more so when virtualization is involved.
When these systems and their applications are attached to large networks, the risk to computing dramatically increases. Basic Security Requirements To provide adequate protection of network resources, the procedures and technologies that you deploy need to guarantee three things, sometimes referred to as the CIA triad: Providing confidentiality of data guarantees that only authorized users can view sensitive information.
Providing integrity of data guarantees that only authorized users can change sensitive information and provides a way to detect whether data has been tampered with during transmission; this might also guarantee the authenticity of data.
Availability of systems and data: System and data availability provides uninterrupted access by authorized users to important computing resources and data.
When designing network security, a designer must be aware of the following: The threats possible attacks that could compromise security The associated risks of the threats that is, how relevant those threats are for a particular system The cost to implement the proper security countermeasures for a threat A cost versus benefit analysis to determine whether it is worthwhile to implement the security countermeasures Data, Vulnerabilities, and Countermeasures Although viruses, worms, and hackers monopolize the headlines about information security, risk management is the most important aspect of security architecture for administrators.
A less exciting and glamorous area, risk management is based on specific principles and concepts that are related to asset protection and security management. An asset is anything of value to an organization.
By knowing which assets you are trying to protect, as well as their value, location, and exposure, you can more effectively determine the time, effort, and money to spend in securing those assets.
A vulnerability is a weakness in a system or its design that could be exploited by a threat.Use the Internet to research and evaluate two (2) commercial HR database systems for your organization.
Evaluate the advantages and disadvantages of each system and, based on your knowledge of human resources and database systems, propose one (1) package that would fit the needs of your organization. Suggest three (3) specific . Records management, also known as records and information management, is an organizational function devoted to the management of information in an organization throughout its life cycle, from the time of creation or inscription to its eventual plombier-nemours.com includes identifying, classifying, storing, securing, retrieving, tracking and destroying or permanently preserving records.
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Database Administrator: The database administrator (DBA) is the person or group in charge for implementing the database system,within an organization. The "DBA has all the system privileges allowed by the DBMS and can assign (grant) and remove (revoke) levels of access (privileges) to and from other users.
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Advantages and disadvantages of 2 HR database systems for your organization. Use the Internet to research and evaluate two (2) commercial HRdatabase systems for your organization.