The advantages of leased lines include:
+ Simplicity: Point-to-point communication links require minimal expertise to install and maintain. So Answer C: Leased lines require little installation and maintenance expertise IS CORRECT !!!
+ Quality: Point-to-point communication links usually offer high service quality, if they have adequate bandwidth.
The dedicated capacity removes latency or jitter between the endpoints. So Answer B: Leased lines with sufficient bandwidth can avoid latency between endpoints IS CORRECT!!!!!
The disadvantages of leased lines include:
+ Limited flexibility: WAN traffic is often variable, and leased lines have a fixed capacity, so the bandwidth of the line seldom matches the need exactly, therefore answer D IS NOT CORRECT.
Additionally, any change to the leased line generally requires a site visit by ISP personnel to adjust capacity.
C. Leased lines require little installation and maintenance expertise.
D. Leased lines provide highly flexible bandwidth scaling
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MartillYu
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