Summary
In this chapter, we discussed the various mechanisms employed for network access
control. The approach to network security through access control is technically
different than implementing security controls at different network layers discussed in
the earlier chapters of this tutorial. However, though the approaches of
implementation are different, they are complementary to each other.
Network access control comprises of two main components: user authentication and
network boundary protection. RADIUS is a popular mechanism for providing central
authentication in the network.
Firewall provides network boundary protection by separating an internal network from
the public Internet. Firewall can function at different layers of network protocol.
IDS/IPS allows to monitor the anomalies in the network traffic to detect the attack and
take preventive action against the same.
Network Security – Critical Necessity
Information and efficient communication are two of the most important strategic
issues for the success of every business. With the advent of electronic means of
communication and storage, more and more businesses have shifted to using data
networks to communicate, store information, and to obtain resources. There are
different types and levels of network infrastructures that are used for running the
business.
It can be stated that in the modern world nothing had a larger impact on businesses
than the networked computers. But networking brings with it security threats which, if
mitigated, allow the benefits of networking to outweigh the risks.
Role of Network in Business
Nowadays, computer networks are viewed as a resource by almost all businesses.
This resource enables them to gather, analyze, organize, and disseminate
information that is essential to their profitability. Most businesses have installed
networks to remain competitive.
The most obvious role of computer networking is that organizations can store virtually
any kind of information at a central location and retrieve it at the desired place through
the network.
Benefits of Networks
Computer networking enables people to share information and ideas easily, so they
can work more efficiently and productively. Networks improve activities such as
purchasing, selling, and customer service. Networking makes traditional business
processes more efficient, more manageable, and less expensive.
The major benefits a business draws from computer networks are −
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