Explanation/Reference:
Explanation:
The network utilized is not one of the key components of an encryption system architecture. In fact, a network is not even required for encryption systems or the processing and protection of data. The data, software used for the encryption engine itself, and the keys used to implement the encryption are all core components of an encryption system architecture.

Explanation
According to the MSP Alliance, typically MSPs have the following distinguishing characteristics:
- Have some form of NOC service
- Have some form of help desk service
- Can remotely monitor and manage all or a majority of the objects for the customer
- Can proactively maintain the objects under management for the customer
- Can deliver these solutions with some form of predictable billing model, where the customer knows with great accuracy what her regular IT management expense will be

Explanation/Reference:
Explanation:
Virtual private networks (VPNs) are used to provide administrative personnel with secure communication channels through security systems and into trust zones. They allow staff who perform system administration tasks to have access to ports and systems that are not allowed from the public Internet.
IPSec is an encryption protocol for point-to-point communications at the network level, and may be used within a trust zone but not to give access into a trust zone. TLS enables encryption of communications between systems and services and would likely be used to secure the VPN communications, but it does not represent the overall concept being asked for in the question. SSH allows for secure shell access to systems, but not for general access into trust zones.

Dynamic application security testing (DAST) is considered "black box" testing and begins with no inside knowledge of the application or its configurations. Everything about the application must be discovered during the testing.