# What algorithm does OSPF use?

## What algorithm does OSPF use?

the shortest path first (SPF)
OSPF uses the shortest path first (SPF) algorithm to determine routes that should be added to the routing table. OSPF routers maintain a map of the internetwork called the link state database.

## What is SPF algorithm in OSPF?

OSPF uses Dijkstra’s SPF algorithm to compute the shortest path tree (SPT). During the computation of the SPT, the shortest path to each node is discovered. The topology tree is used to populate the routing table with routes to IP networks.

How OSPF work explain with example?

The OSPF (Open Shortest Path First) protocol is one of a family of IP Routing protocols, and is an Interior Gateway Protocol (IGP) for the Internet, used to distribute IP routing information throughout a single Autonomous System (AS) in an IP network.

What is OSPF and how does it work?

OSPF is a routing protocol. Two routers speaking OSPF to each other exchange information about the routes they know about and the cost for them to get there. OSPF routers rely on cost to compute the shortest path through the network between themselves and a remote router or network destination.

### What are the routing metrics for OSPF?

Routing metrics. OSPF uses path cost as its basic routing metric, which was defined by the standard not to equate to any standard value such as speed, so the network designer could pick a metric important to the design. In practice, it is determined by comparing the speed of the interface to a reference-bandwidth for the OSPF process.

### What is OSPF used for?

OSPF is an Interior Gateway Protocol (IGP) used to exchange path information between routers in the same network domain. See also domain, IGP, IP, link-state protocol, packet, path, port, and router.

What are the two characteristics of OSPF?

the most commonly used alternative to RIP.

• to routers.
• Is a more economical routing protocol than RIP over time because it involves less network traffic.
• How does OSPF protocol work?

OSPF is a routing protocol. Two routers speaking OSPF to each other exchange information about the routes they know about and the cost for them to get there. When many OSPF routers are part of the same network, information about all of the routes in a network are learned by all of the OSPF routers within that network—technically called an area.