Ospf tutorialspoint

1. What is OSPF and how it works?
2. What is OSPF routing protocol Tutorialspoint?
3. Why OSPF is better than RIP?
4. What is the function of OSPF?
5. Which OSI layer is OSPF?
6. Does OSPF use TCP or UDP?
7. Why is OSPF stuck in two way?
8. Which is better OSPF or BGP?
9. Is OSPF or EIGRP better?
10. What are the basic concepts of OSPF?
11. What is OSPF explain in interview?
12. When should OSPF be used?
13. Is OSPF TCP or UDP?
14. What is E1 and E2 in OSPF?

What is OSPF and how it works?

Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS).

What is OSPF routing protocol Tutorialspoint?

OSPF protocol is called a link state routing protocol, which maintains link state databases. The state of a route in the network is the cost. OSPF protocol allows every router to calculate the cost of the routes to any given reachable destination.

Why OSPF is better than RIP?

OSPF protocol has no limitations in hop count, unlike RIP protocol that has only 15 hops at most. So OSPF converges faster than RIP and has better load balancing. OSPF multicasts link-state updates and sends the updates only when there is a change in the network.

What is the function of OSPF?

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.

Which OSI layer is OSPF?

OSPF and BGP belong to the Application Layer.

Does OSPF use TCP or UDP?

OSPF routers communicate using IP packets. OSPF messages ride directly inside of IP packets as IP protocol number 89. Because OSPF does not use UDP or TCP, the OSPF protocol is fairly elaborate and must reproduce many of the features of a transport protocol to move OSPF messages between routers.

Why is OSPF stuck in two way?

If you are seeing neighborship stuck in 2-Way state, there could be two possibilities: a) In network segments with multiple OSPF routers, two routers are chosen as DR and BDR respectively based on their priority or Router ID. All other OSPF routers are supposed to form adjacency with DR and BDRs.

Which is better OSPF or BGP?

While OSPF uses cost as a metric to determine the best path, BGP uses BGP attributes to determine the best path. Because it is not uncommon to have multiple paths to the same destination, BGP has a best-path selection algorithm to eventually choose the best path (or paths, if BGP multipath is configured).

Is OSPF or EIGRP better?

Both protocols converge faster than other interior gateway protocols or BGP. However, EIGRP is faster than OSPF due to an internal mechanism that we will cover later in this article. In terms of resource requirements, EIGRP does not pose the same burden on the routers for a given scale of the network.

What are the basic concepts of OSPF?

OSPF concepts include areas and interfaces to routers that are defined within them. The OSPF protocol uses packet types for initial neighbor discovery, and to send and receive link-state advertisements (LSAs) throughout its network of IP addresses.

What is OSPF explain in interview?

The term "OSPF" stands for "Open Shortest Path First." It is an open average link-state routing protocol that uses the SPF algorithm developed by Dijkstra to determine the shortest and straightest route. The resulting best path is then used to fill the routing database.

When should OSPF be used?

OSPF is primarily used for the LAN and data center but can also occasionally work in WAN and IaaS environments. BGP is most often used for internet redundancy, WAN and IaaS environments, while OSPF is primarily used for the LAN and data center.

Is OSPF TCP or UDP?

OSPF routers communicate using IP packets. OSPF messages ride directly inside of IP packets as IP protocol number 89. Because OSPF does not use UDP or TCP, the OSPF protocol is fairly elaborate and must reproduce many of the features of a transport protocol to move OSPF messages between routers.

What is E1 and E2 in OSPF?

E1 routes indicate cumulative cost to reach the destination i.e. int indicates cost to reach ASBR + cost to destination from ASBR. E2 route reflects cost only from the ASBR to destination. This is the default used by ospf for redistribution.