Defensive Network Security: Practical Methodologies - Emerging computer and network security threats have greatly changed the landscape of the security security scene. These new, advanced and unknown threats and attack methodologies have rendered traditional perimeter security devices such as firewall and IDS/IPS useless. However, the concept of Network Security Monitoring (NSM) has not make these devices obsolete - instead IDS/IPS and firewall device have become one of the essential parts of NSM.
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