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are ccna practice tests effective.. the EIGRP converges quickly. which means that if something changes in the Intemet ±. the EIGRP will quickly find the best current non-loopback routing.For example, RIP uses a basic hop metric, which is the number of routers between the destination subnet and the local router. the RIP relies on these metrics to select short routes (the fewest number of router hops) and may even select routes with shorter but slower links, so that the routes selected may not necessarily be the best ones. the EIGRP metric is calculated using an equation that avoids routers selecting slow links by giving these routes a worse (higher) metric. As shown in Figure 9-2.RIP EIGRPSubnet 10.1.1.0Figure 9-2 EIGRP Selection to Subnet 10.1.1.0 Longer and Better Routes Traditionally, since the introduction of EIGRP in the 1990s until 2013, the biggest negative issue with EIGRP has been that Cisco has made the protocol its own. That is, to run Cisco's EIGRP, you had to buy a router made by Cisco. In an interesting twist, Cisco has made EIGRP publicly available as an RFC report, which means that other manufacturers now have the option to use EIGRP as well. In the past, many companies chose to use OSPF over EIGRP in order to give themselves more options when purchasing router hardware equipment in the future. Today, EIGRP and OSPFv2 are still the two best options for IPv4 internal routing protocols. Both have very fast convergence rates. They both use excellent metrics that take link speed into account when selecting routes. the implementation of EIGRP is much simpler. Many sensible network administrators have compared the two over the years, with some choosing OSPFv2 and others choosing EIGRP. for learning and reference purposes, Table 9-2 lists several features of OSPFv2 and EIGRP, including, of course, RIP-2. (Note that the table mentions a topic not yet discussed in this book) (Note that the table mentions a topic that has not been discussed in this book --Automatic Summarization--it will be discussed in Chapter 10, "Automatic Summarization and Discontinuous Networks.")1.2 Basics 189(The following table compares internal IP routing protocols.Sprawl Functionality RIP-2 EIGRP OSPFClassless / Support VLSM Yes Yes YesDistance Vector (DV) or Link State (LS) DV DV* LS