Which of the following choices is an example of a backbone service?

A.
System monitoring and optimization.

B.
Routing.

C.
User management.

D.
File backup.

Explanation:
Routing of frames and packets is performed over a backbone, and is a
backbone service. The purpose of the backbone is the proper movement and
direction of data across the backbone network. Routing as a backbone service is an
internal service of the network.
Incorrect Answers:
A: Although you can monitor and optimize the backbone, this is not a service directlysupplied by
the backbone. This function is done externally to the network and backbone.
C: A backbone network does not have users, so there is no user management. Nownetwork
devices, such as bridges, switches, and routers may have userids and passwordsto control access
to the device, but this does not fall under user management as abackbone service.
D: File backup is not a service of the backbone. All data that flows through the backboneis
dynamic and is single use, so there is no need to backup any data.