Regarding the cost value (Cost) of the routing protocol, which of the following description is incorrect?

Regarding the cost value (Cost) of the routing protocol, which of the following description is incorrect?
A . Because different routing protocols use different basis for calculating routing costs, it is generally recommended to automatically switch when importing routes.
B . Because different routing protocols have different basis for calculating routing costs, manual configuration is generally recommended when importing routes.
C . Generally, the cost values ​​of ISIS and OSPF are based on bandwidth, and the range of values ​​is wide.
D . Generally, the overhead of RIP is based on the number of hops, and the value range is very small.

Answer: A

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