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51.
What is attenuation?

The degeneration of a signal over distance on a network cable is called attenuation

52.
What is cladding?

A layer of a glass surrounding the center fiber of glass inside a fiber-optic cable

53.
What is RAID?

Redundant Array Independent Disk is a method for providing fault tolerance by using multiple hard disk drives

54.
What is NETBIOS and NETBEUI?

NETBIOS is a programming interface that allows I/O requests to be sent to and received from a remote computer and it hides the networking hardware from applications

NETBEUI is NetBIOS extended user interface. A transport protocol designed by microsoft and IBM for the use on small subnets

55.
What is redirector?

Redirector is software that intercepts file or prints I/O requests and translates them into network requests. This comes under presentation layer