The Internet and Its Protocols

14.2 Choosing Where to Apply Security 681

14.2

Choosing Where to Apply Security

Security within an IP network can be applied at any or all of a set of different

levels. Physical security governs the connectivity and access to private networks;

protocol-level security controls and safeguards the essential protocols that make

the Internet work; application security can be used to protect sensitive data and

to limit access to applications; transport and network layer security is used to

protect data flows across public or exposed networks and connections.

Choosing between these options is as ...