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How do routing protocols use metrics?
A metric is a measurable value that is assigned by the routing protocol to different routes based on the usefulness of that route. In situations where there are multiple paths to the same remote network, the routing metrics are used to determine the overall “cost” of a path from source to destination.
Why are routing metrics so important in determining the performance of networks?
To determine the optimal route for data to travel, networks employ a system called routing. Network routing examines every possible path that data can take across a network and chooses the route that the data will take. Routing is important for networks to get data where it needs to go as quickly as possible.
What cost metric?
Metrics are cost values used by routers to determine the best path to a destination network. Several factors help dynamic routing protocols decide which is the preferred or shortest path to a particular destination. For some routing protocols these metrics are static and may not be changed. …
What is true about the metrics used by routing protocols?
Routing protocol algorithms use metrics, which are numerical values that are associated with specific routes. These values are used to prioritize of prefer routes learned by the routing protocol from the most preferred to the least preferred. In essence, the lower the route metric, the more preferred the route by the routing protocol.
What are common routing protocols?
Common routing protocols include RIP, RIPv2, IGRP, EIGRP, IS-IS and BGP. For the CCNA exam you will need to be well versed in RIP, RIPv2, IGRP and EIGRP. You should be aware of IS-IS and BGP, and be able to configure basic OSPF .
What is gateway metric?
The gateway with lowest Metric is the first to be searched(Default Gateway). Metric is the cost of using that gateway, and it will always use the one with the lowest cost first. The metric can also be applied when having more than one network adapter, which connects to the same Network(Subnet).
What is interface metric method?
The interface metric (IPConnectionMetric) for a network connection indicates the cost of using the routes in the IP routing table. The routes are derived from the interface configuration. The cost becomes the value in the Metric column for those routes in the IP routing table.