| 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 |
OSPF Cost
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