$15.$ Large network projects

a$.$ usually require the services of many vendors.

b$.$ leave the organization with myriad products, hardware, and software.

c$.$ need thorough testing.

d$.$ can benefit greatly from a pilot installation.

True$-$False Questions

$16.$ For a small business with simple networks, network management may mean an occasional visit by a trained technician to handle a particular problem, make sure the networks are running properly, or install some upgrades.

$17.$ PDNs are publicly owned and operated WANs that provide public access and charge

fees for connection services.

$18.$ The networks we are concerned with managing are corporate networks and their connections to public data networks $($PDNs$).$

$19.$ An organization$$s own internal networks routinely comprise multiple LANs interconnected by internal routers.

$20.$ Intranets that have internal connections reside behind the corporate firewalls and are

accessible only to authorized employees.

$21.$ A company may set up an extranet between itself and key suppliers to automate order$/$re$-$order inventory processing.

$22.$ Later, as outdated systems were replaced, compatibility was kept in mind, so the task load shifted to keeping complex interrelated systems running smoothly.

$23.$ Companies that installed them soon learned that simplification often was a myth$.$ The NMSs were not necessarily compatible with all the corporate equipment and the $($proprietary$)$ monitoring devices they contained, and they were complicated to master.