3.2 WHAT IS NETWORK SECURITY

 Let us first revisit the concept of network. A computer network is simply a system of interconnected computers. That is used every day to conduct transactions and communications among businesses, government agencies and individuals. The networks consist of "nodes", which are "client" terminals (individual user PCs), and one or more "servers" and/or "host" computers. They are linked by communication systems, some of which might be private, such as within a company and others which might be open to public access. The obvious example of a network system that is open to public access is the Internet, but many private networks also utilize publiclyaccessible communications. Today, most companies' host computers which can be accessed by their employees whether in their offices over a private communications network, or from their homes or hotel rooms while on the road through normal telephone lines. Hence, security plays a crucial role in that. Now, let us understand the concept of Network Security.

Network security comprises the measures a company takes to protect its computer system and it is a prime concern for every company which uses computers. 

Compromised network security means a hacker or competitor may gain access to critical or sensitive data, possibly resulting in data loss, or even complete destruction of the system.

Network security involves all activities that organizations, enterprises, and institutions undertake to protect the value and ongoing usability of assets and the integrity and continuity of operations. An effective network security strategy requires identifying threats, risks and vulnerabilities and then choosing the most effective set of tools to combat them.


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