Master OSPF Encapsulation: Essential Guide for Cisco Certification (Updated 2025)
Open Shortest Path First (OSPF) operates at the Internet Protocol’s network layer, encapsulated solely by IP and local data-link headers. This encapsulation enables efficient routing in enterprise networks. When transmitted over Ethernet, OSPF messages include a data-link frame header, an IP packet header (with protocol field 89), and an OSPF packet header, ensuring reliable delivery.… Read more
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