Maintenance engineers must maintain the security of the VCN at different layers based on security maintenance objects and objectives.
Application layer
Maintenance objects at the application layer include VCN network elements (NEs) such as core applications, capability components, and service modules, and services provided by these NEs. At the application layer, security maintenance is conducted using maintenance terminals or tools dedicated to maintenance objects.
Security maintenance at this layer ensures that the VCN runs and provides services properly.
System layer
Maintenance objects at the system layer include the operating system, database, and middleware. At the system layer, security maintenance is conducted using maintenance terminals or tools dedicated to maintenance objects.
Security maintenance at this layer ensures that the operating system, database, and middleware run properly so that all applications at the application layer run properly.
Network layer
Maintenance objects at the network layer include switches, routers, and firewalls. At the network layer, security maintenance is conducted using maintenance terminals or tools dedicated to maintenance objects.
Security maintenance at this layer ensures the proper running of switches, routers, and firewalls and implementation of security policies at this layer.
Management layer
Maintenance at the management layer involves management and maintenance of NEs such as core applications, capability components, and service modules, and maintenance of network devices.
Security maintenance at this layer enhances manual management and maintenance to prevent potential risks.
