There are four logical layers of TMN wherein the Service Management Layer ____________
A. Analyzes business aspects, trends and billing options
B. Performs configuration, control, and distributes network resources
C. Handles network elements, network information and helps in maintenance
D. Handles administration, information and charges of service in a network
Explanation: TMN has four logical layers that are based on the network management services: business, network, service, and element. These layers are Business Management, Network Management, Service Management, and Element Management. Thus, Service Management Layer looks after services in a network and its administration.
