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