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cisco 210-060 dumps free.Figure 18.2 illustrates equal overhead path load balancing. In this example, Router A has two equal-overhead paths to 10.0.0.0, both of which have a hop count of 1, via Router B and Router C. Adding both paths to Router A's routing table has two advantages.. Router A can load-balance the traffic going to 10.0.0.0, thus utilizing the bandwidth of both links.. Convergence is faster in the event of a failure on one path. For example, if the connection between Router A and Router B fails, Router A can still go to network 10.0.0.0 via Router C and include this information in its routing table. In this way, convergence will complete immediately.For these two reasons, many routing protocols support multiple paths to the same destination network. Some protocols also support non-equal overhead path load balancing, such as EIGRP, which will be discussed in Chapter 20.Exam Essentials RIPvl is a classification protocol that broadcasts updates every 30 seconds with a retention time of 180 seconds. It uses hop count as a metric: the path with the lowest cumulative hop count is selected and added to the routing table.Figure 18.2 Equal-Overhead Path Load BalancingOne thing that must be kept in mind when using RIPv2 is that it is based on RIPvl, which is essentially a distance vector protocol, but with improvements, and is therefore often referred to as a hybrid protocol. The previous section described some of the features that both versions have, and this section describes the features that are specific to RIPv2. One important improvement made to RIPv2 relates to the way routing updates are handled; instead of using broadcasts, it uses multicasts: updates are advertised to 224.0.0.9, and all RIPv2 routers will handle them. To increase the speed of convergence, RIPv2 supports triggered updates: when a change occurs in the network, RIPv2 routers immediately propagate their routing information to their connected neighbors. A second important improvement to RIPv2 is that it is a classless protocol. RIPv2 supports variable-length subnet masks (VLSM), which allow you to use multiple subnet masks in a given network. VLSM allows you to maximize the efficiency of your addressing scheme and also allows you to aggregate routing information to enable the formation of large, scalable networks. VLSM is discussed in Chapter 7.RIPv2, although it has many advanced features, is still essentially a distance vector protocol. It uses hop count as a metric, uses the same solution as RIPvl to solve the routing loop problem, sets the maximum hop count to 15, and much more in common with RIPvl. RIPv2 is based on RIPvl, but is a hybrid protocol. It uses multicast to propagate routing information and supports triggering changeChapter 18 Basic Routing 467New. Unlike RIPvl, RIPv2 supports VLSM (subnet mask advertised with the network number), which allows you to aggregate routing information; it also supports authentication for routing updates. Otherwise, RIPv2 is similar to RIPvl in other ways.