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What are two drawbacks of implementing a link-state routing protocol? (Choose two.)
Correct Answer: B,D
Explanation/Reference: Dynamic Routing Protocols Reference: http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=4 Explanation: Link State routing protocols, such as OSPF and IS-IS, converge more quickly than their distance vector routing protocols such as RIPv1, RIPv2, EIGRP and so on, through the use of flooding and triggered updates. In link state protocols, changes are flooded immediately and computed in parallel. Triggered updates improve convergence time by requiring routers to send an update message immediately upon learning of a route change. These updates are triggered by some event, such as a new link becoming available oor an existing link failing. The main drawbacks to link state routing protocols are the amount of CPU overhead involved in calculating route changes and memory resources that are required to store neighbor tables, route tables and a complete topology table.