Question: What Port Does OSPF Use?

Is OSPF Classful or classless?

Classful routing protocols do not carry subnet masks; classless routing protocols do.

Older routing protocols, including RIP and IGRP, are classful.

Newer protocols, including RIP-2, EIGRP, and OSPF, are classless..

How does OSPF work in networking?

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.

Is Rip a TCP or UDP?

RIP uses the User Datagram Protocol (UDP) as its transport protocol, and is assigned the reserved port number 520.

Why rip is Layer 7 protocol?

RIP is an Application Layer protocol. The application that is using the protocol is the RIP routing process / application on each router. An application layer protocol will still rely upon lower layers (Transport, Network, Data Link and Physical) to help deliver the Application data.

Does rip use TCP?

RIP uses the User Datagram Protocol (UDP) as its transport protocol, and is assigned the reserved port number 520. Open Shortest Path First (OSPF) is a link-state routing protocol. OSPF does not use a TCP/IP transport protocol (UDP, TCP), but is encapsulated directly in IP datagrams with protocol number 89.

Is OSPF better than Eigrp?

OSPF scales better than EIGRP because EIGRP is more complex in very large scale networks while troubleshooting. Compared to EIGRP, OSPF is better to use on WAN since most of the service providers support it. OSPF have already been running in internal environments as an IGP (Interior Gateway Protocol).

Where is OSPF used?

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 layer is OSPF?

data link layerOSI layer designation IS-IS runs on the data link layer (Layer 2) Open Shortest Path First (OSPF) is encapsulated in IP, but runs only on the IPv4 subnet, while the IPv6 version runs on the link using only link-local addressing. IGRP, and EIGRP are directly encapsulated in IP.

Is OSPF open standard?

The Open Shortest Path First (OSPF) protocol is a link state protocol that handles routing for IP traffic. Its newest implementation, version 2, which is explained in RFC 2328, is an open standard. Open Shortest Path First (OSPF) is an open standard (not proprietary) and it will run on most routers independent of make.

Why is OSPF used?

As a link-state routing protocol, OSPF maintains link-state databases, which are really network topology maps, on every router on which it is implemented. The state of a given route in the network is the cost, and OSPF algorithm allows every router to calculate the cost of the routes to any given reachable destination.

What are the four timers in RIP?

The timers are: Update, Invalid, and Flush. You can verify these timers with the show ip protocols command as shown in Example 1. The period between routing information sent between neighbors is the Update interval. This is the primary timer used in RIP and convergence is derived.

What port is BGP?

Among routing protocols, BGP is unique in using TCP as its transport protocol. BGP peers are established by manual configuration between routing devices to create a TCP session on port 179. A BGP-enabled device periodically sends keepalive messages to maintain the connection.

How does OSPF determine cost?

Open Shortest Path First (OSPF) uses “Cost” as the value of metric and uses a Reference Bandwidth of 100 Mbps for cost calculation. The formula to calculate the cost is Reference Bandwidth divided by interface bandwidth. For example, in the case of 10 Mbps Ethernet , OSPF Metric Cost value is 100 Mbps / 10 Mbps = 10.

Does OSPF use TCP or UDP?

OSPF Packets 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 router OSPF 1?

I need to use the router ospf command to get into the OSPF configuration. The number “1” is a process ID and you can choose any number you like. It doesn’t matter and if you want you can use a different number on each router.

What are the four basic components of Eigrp?

EIGRP has four basic components:Neighbor Discovery/Recovery.Reliable Transport Protocol.DUAL Finite State Machine.Protocol Dependent Modules.

What are the benefits of OSPF protocol?

OSPF supports/provides/advantages –Both IPv4 and IPv6 routed protocols.Load balancing with equal cost routes for same destination.VLSM and route summarization.Unlimited hop counts.Trigger updates for fast convergence.A loop free topology using SPF algorithm.Run on most routers.Classless protocol.

What port does Eigrp use?

Since EIGRP does not use TCP for communication, it implements Cisco’s Reliable Transport Protocol (RTP) to ensure that EIGRP router updates are delivered to all neighbors completely. The reliable transport protocol also contains other mechanisms to maximize efficiency and support multicasting. EIGRP uses 224.0.