|Exam 200-120||Question id=5|
Which parameter or parameters are used to calculate OSPF cost in Cisco routers?
Bandwidth, MTU, Reliability, Delay and Load|
Bandwidth, Delay and MTU|
Bandwidth and Delay|
Reliability, Delay, and Load|
Delay and Load|
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