Exam 200-120 Question id=5

Which parameter or parameters are used to calculate OSPF cost in Cisco routers?

A. Bandwidth, MTU, Reliability, Delay and Load
B. Bandwidth, Delay and MTU
C. Bandwidth and Delay
D. Reliability, Delay, and Load
E. Delay and Load
F. Load
G. Bandwidth

The cost (also called metric) of an interface in OSPF is an indication of the overhead required to send packets across a certain interface. The cost of an interface is inversely proportional to the bandwidth of that interface. A higher bandwidth indicates a lower cost. There is more overhead (higher cost) and time delays involved in crossing a 56k serial line than crossing a 10M Ethernet line. The formula used to calculate the cost is: Cost= 10000 0000/bandwidth in bps


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