Which of the following is false about staff costs for a network?

The most expensive part of the network today is the staff who design, operate, and maintain it$.$

The emphasis is on network designs that reduce staff time needed to operate them.

Network staff are often required to learn to operate a variety of devices.

Network staff are often required to maintain a variety of devices.

When a variety of devices from different vendors is used in a network, it takes less time to perform network management activities.