📄 ospftheory.htm
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<h1><font size="4">OSPF Overview</font></h1>
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<p class="MsoNormal" style="text-autospace: none"><font face="Arial">Open Shortest Path First
(OSPF) is a dynamic-link state, hierarchical IGP (Interior Gateway Protocol)
routing protocol based on open standards. It was designed as a replacement to
RIP and was derived from an early version of IS-IS protocol (Intermediate System
to Intermediate System protocol). OSPF is a robust protocol whose features
include: least-cost routing, multipath routing, and load balancing. The shortest
path through the network is calculated by using the Dijkstra algorithm.</font></p>
<p class="MsoNormal" style="text-autospace: none"><font face="Arial">Cisco uses it own
implementation of the OSPF standards with additional features that are important
for interoperability.</font></p>
<p class="MsoNormal" style="text-autospace: none"><font face="Arial">Once we configure the router
for OSPF it must start the process of learning its environment by going through
a few phases of initialization. It goes through a process of using 揾ello
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