Which task is considered part of network performance management
a. connecting network servers to a gateway
b. protecting the network from unwanted intruders
c. installing and configuring the network operating systems
d. monitoring speed of the networks internet connection

D. Monitoring speed of the networks internet connection

Explanation:

The Network performance management has as its main task the management of the local network, internet connection as well as related computing resources directly or indirectly. Installation, configuration and maintenance of operating systems and IT infrastructure services are also responsibilities of this professional.

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