An effective security policy balances accessibility with protection. Security policies are enforced at
network perimeters. Often people think of a perimeter as the boundary between an internal network and the
public Internet, but a perimeter can be established anywhere within a private network, or between your network
and a partner's network.
A Solid Perimeter Security Solution
A comprehensive perimeter security solution enables communications across it as defined by the security policy,
yet protects the network resources from breaches, attacks, or unauthorized use. It controls multiple network
entry and exit points. It also increases user assurance by implementing multiple layers of security.
The Cisco wide range of Cisco perimeter security solutions provides several levels of perimeter security that can
be deployed throughout your network as defined by your security policy. These solutions are highly flexible and
can be tailored to your security policy.
Security in Layers
As discussed earlier, security in layers is the preferred and most scalable approach to safeguard a network. One
single mechanism cannot be relied on for the security of a system. To protect your infrastructure, you must
apply security in layers.
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