Types of OSPF Network – Introduction

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Types of OSPF Network – Introduction
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OSPF is a dynamic link-state routing protocol replacing the distance vector routing protocol, RIP. However, OSPF has important advantages over RIP. OSPF offers faster convergence and scales to much larger network implementations. The OSPF defines five types of OSPF networks:

Point-to-point—A point–to–point network is when two routers are interconnected over a common link without any other router. The figure below illustrates a point-to-point link.

Point-to-point link
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Broadcast multiaccess—When multiple routers are interconnected over an Ethernet network, it is known as an OSPF Broadcast multi-access network. It contains multiple devices on the same shared media sharing data.

Ethernet LANs are the most common example of broadcast multi-access networks. Different hosts, printers, routers, and other devices are all members of the same network. The figure below illustrates the broadcast multi-access network.

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Types of OSPF Network
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Nonbroadcast multiaccess (NBMA)– When Multiple routers are interconnected in a nonbroadcast network known as Nonbroadcast multi-access (NBMA), such as Frame Relay, which does not allow broadcast. The figure below illustrates the NBMA.

Types of OSPF Network
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Point-to-multipoint– This network contains a router connected with multiple sites. Usually, this is a hub-and-spoke topology over an NBMA network. The figure below illustrates the point-to-multipoint network.

Types of OSPF Network
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Virtual links – A special OSPF network interconnects remote OSPF areas to the backbone area. The figure below illustrates the special virtual links. In the figure, area 10 cannot connect directly to the area0. A special OSPF area must be configured to connect area 10 to area 0. The router R1 and R2 area1 is a special OSPF virtual link for interconnecting area 10 and area 0

Types of OSPF Network
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Asad Ijaz

NetworkUstad's lead networking architect with CCIE certification. Specializes in CCNA exam preparation and enterprise network design. Authored 2,800+ technical guides on Cisco systems, BGP routing, and network security protocols since 2018. Picture this: I'm not just someone who writes about tech; I'm a certified expert in the field. I proudly hold the titles of Cisco Certified Network Professional (CCNP) and Cisco Certified Network Associate (CCNA). So, when I talk about networking, I'm not just whistling in the dark; I know my stuff! My website is like a treasure trove of knowledge. You'll find a plethora of articles and tutorials covering a wide range of topics related to networking and cybersecurity. It's not just a website; it's a learning hub for anyone who's eager to dive into the world of bits, bytes, and secure connections. And here's a fun fact: I'm not a lone wolf in this journey. I'm a proud member and Editor of Team NetworkUstad. Together, we're on a mission to empower people with the knowledge they need to navigate the digital landscape safely and effectively. So, if you're ready to embark on a tech-savvy adventure, stick around with me, Asad Ijaz Khattak. We're going to unravel the mysteries of technology, one article at a time!"

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1 Comment

  1. What are Challenges in Multiaccess OSPF Networks » Networkustad
    January 9, 2021 @ 10:00 pm

    […] defines five types of network. The types are point-to-point, Broadcast Multi-access, Non-broadcast Multi-access (NBMA), […]