The Network Defense Series from EC-Council | Press is comprised of 5 books designed to educate learners from a vendor-neutral standpoint on how to defend the networks they manage. This series covers the fundamental skills in evaluating the internal and external threats to network security and design, how to enforce the network level security policies, and how to ultimately protect an organization's information. The books in the series cover a broad range of topics from secure network fundamentals, protocols & analysis, standards and policy, hardening infrastructure, configuring IPS, IDS, firewalls, bastion host and honeypots. Learners completing this series will have a full understanding of the defensive measures taken to secure their organization's information, and along with the proper experience these books will prepare readers for the EC-Council Network Security Administrator (E|NSA) certification.

Understanding the threats to an organization's infrastructure as well as the internal policies and mechanisms used to defend the infrastructure is an integral part of a Network Security Administrator's role. This book, the second in the series, is designed to cover a broad range of topics from a vendor-neutral perspective preparing the Administrator to implement and enforce policies that leverage not only the knowledge of how these threats can materialize, but also the mechanisms used to prevent them.

1.Network Security
Chapter Brief:
Network security involves preventing and detecting unauthorized access over a network and ensuring that the network is secure. The major elements of Network Security are identification, authentication, access control, confidentiality, integrity, and non-repudiation.
2.Security Policy
Chapter Brief:
A security policy is an outline that becomes an active part of the organization for the physical, personal, and data security. It has the ability to manage the security of the data network infrastructure and valuable information assets.
3.Network Security Threats
Chapter Brief:
4.Intrusion Detection Systems (IDSs) and Intrusion Prevention Systems (IPSs)
Chapter Brief:
An Intrusion Detection System (IDS) monitors all inbound and outbound host activity and identifies the suspicious patterns on network that indicate an attack that could compromise a system. It gathers and analyzes the information regarding the misuse of a particular computer or total network.
5.Troubleshooting Networks
Chapter Brief:
Troubleshooting is the process of identifying the symptoms of the problem and resolving them. When an error message is displayed in the network, abnormal behavior of the devices and the unexpected results are displayed.
This chapter describes the various trouble shooting strategies and methodologies and lists the trouble shooting network devices such as Windows PC Network Interface Card. This chapter discusses how to troubleshoot IEEE 1394 Bus devices, Universal Serial Bus (USB) devices, Bridges using the Virtualization Engine, diagnosing Repeater, Gateway. This chapter also describes how to troubleshoot network communication, network adapter, and explains how to overcome the connectivity problem.