Explanation/Reference:
+ provides secure network access, isolates and controls infected devices attempting access: Trust and Identity Management
+ uses encryption and authentication to provide secure transport across untrusted networks: Secure Connectivity
+ uses security integrated into routers, switches, and appliances to defend against attacks: Threat Defense
+ integrates security into the network to identify, prevent, and adapt to threats: Cisco Self-Defending Network Trust and identity management solutions provide secure network access and admission at any point in the network and isolate and control infected or unpatched devices that attempt to access the network. If you are trusted, you are granted access. We can understand "trust" is the security policy applied on two or more network entities and allows them to communicate or not in a specific circumstance. "Identity" is the
"who" of a trust relationship.
The main purpose of Secure Connectivity is to protect the integrity and privacy of the information and it is mostly done by encryption and authentication. The purpose of encryption is to guarantee condentiality; only authorized entities can encrypt and decrypt data. Authentication is used to establish the subject's identity. For example, the users are required to provide username and password to access a resource...