Service metrics are used to monitor, measure, and verify services in the network and determine if performance requirements are being met. Therefore, service metrics must be meaningful to the network operators, managers, users, and staff. For each performance requirement below, describe a service metric that could be used to measure and verify the requirement.

a. Reliability of a Transmission System1(T1) link between an enterprise network and its (Internet

Service Provider (ISP) , with IP routers on each end of the T1. b. Round-trip delay between devices on network A and servers on server LAN B. c. Average traffic rate in and out of a compute server, measured across all four of its LAN interfaces over 15-minute intervals.