are cisco certifications free

are cisco certifications free.Figure 9-3 shows a view of the vectors and distances obtained by RIP. The figure shows the flow of RIP information that enables R1 to obtain certain IPv4 routes.Specifically, the three routes that reach subnet X A 4-hop route through R2. A 3-hop route through R5... A 2-hop route through R7.Figure 9-3 Information Obtained Using the DV ProtocolThe DV protocol obtains two pieces of information about possible routes to reach a subnet: distance (metric) and vector (next-hop router). In this example, R1 obtains three routes to reach subnet X. If there were only one route to reach a single subnet, the router would choose that unique route. However, this example has three possible routes, and R1 chooses the two-hop route through the next-hop R1 because that route has the lowest RIP metric.2.2 Basics 190While Figure 9-3 illustrates how R1 obtains routes using RIP updates, Figure 9-4 gives a better view to illustrate R1's distance vector logic. rl knows three routes, each with adistance: a possible routing metric.Subnet Xvector: direction, obtained based on the next-hop router of the possible route.Note that R1 does not know other topological information about the Internet network. Unlike the LS protocol, RIP's DV logic does not know the entire topology; it only knows the next-hop router and metric. Complete update of information and horizontal segmentation