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Summary |
Once this module is complete, the student should have a firm understanding of the following concepts:
IS-IS is a versatile routing protocol used in many very large ISPs. The natural scalability of IS-IS makes it a great choice for modern large-scale IGP network deployments. IS-IS uses the SPF algorithm, just as OSPF, but requires less SPF calculations as a result of its ability to handle PRCs. IS-IS has established a firm foothold in many networks comprising the Internet and it will not be surprising if its presence expands in the years to come.
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