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Which option describes a benefit of a point-to-point leased line?

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Which option describes a benefit of a point-to-point leased line? 

A. Low cost 
B. Full-mesh capability 
C. Flexibillity of design 
D. Simply of configuration 

Correct Answer: D 
Explanation 
Explanation/Reference: 
Point-to-point leased line is the most expensive interconnection between two ends as the line is dedicated to a single user, the user should still pay for all available bandwidth, including those unused. -> A is not correct. 
With the cost of point-to-point leased line, the full-mesh capability is only achieved when your company has very very strong budget to pay all the bills. To create a full-mesh topology for n sites, we need n*(n-1)/2 leased line connections. For example if we have 6 sites then we need 6*5/2 = 15 leased line connections - > It is nearly impossible for a normal company to achieve full-mesh topology -> B is not correct. 
Flexibility is not an advantage of leased line connection -> C is not correct. 
Point-to-point leased line simplifies the configuration as the circuit is available on a permanent basis and does not require a connection to be set up before traffic is passed. It does not require to define a permanent virtual circuit (PVC) in the configuration either -> D is correct.

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benefit of a point-to-point leased line

Which option describes a benefit of a point-to-point leased line?
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