The next section continues the discussions by looking at specific commonalities and differences between IS-IS and OSPF. The most obvious place to continue is to consider the similarities. However, before that, take a quick look at terminologies associated with each protocol. As previously indicated, these protocols originated in different standard bodies, IS-IS in ISO (now the ITU) and OSPF in the IETF, and therefore, each is associated largely with different terminologies. Table 7-1 lists the terminology associated with each protocol and attempts to march them with equivalents in other protocol.

Table 7-1. IS-IS Versus OSPF Terminology
IS-IS OSPF Comments
End System Host  
Intermediate System (IS) Router  
Circuit Link  
Subnetwork Point ...

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