Root: WRM Database > Information Technology > Certifications > CCNA > IOS Commands > "ip ospf network type" > OSPF Interface Types / OSPF Network Types
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > Link-State > OSPF > BDR > OSPF Interface Types / OSPF Network Types
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > Link-State > OSPF > DR > OSPF Interface Types / OSPF Network Types
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > Link-State > OSPF > Interface Types (or Network Types) > Broadcast > OSPF Interface Types / OSPF Network Types
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > Link-State > OSPF > Interface Types (or Network Types) > Point-To-Point > OSPF Interface Types / OSPF Network Types
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > Link-State > OSPF > IOS Commands > "ip ospf network type" > OSPF Interface Types / OSPF Network Types



OSPF Interface Types / OSPF Network Types


OSPF dictates that a subnet either should or should not use a Designated Router (DR) and Backup Designated Rout (BDR) based on the OSPF interface type (also sometimes called the OSPF network type). Several OSPF interface types exist, but for the CCNA exams you should be aware of two main types: point-to-point and broadcast. (These types can be configured with the "ip ospf network type" command.) These OSPF interface types make a general reference to the type of data-link protocol used. As you might guess from the names, the point-to-point type is intended for use on point-to-point links, and the broadcast type is for use on data links that support broadcast frames, such as LANs.







References

Odom, Wendell (2008) CCNA ICND2 Official Exam Certification Guide, Second Edition. Indianapolis: Cisco Press.