ccna 200 301 syllabus plural of crisis

ccna 200 301 syllabus plural of crisis.5.5.3 Principles of routing***How should routers perform routing when a destination address is covered by multiple destination networks, when multiple paths of multiple routing protocols coexist for a destination network, or when multiple paths of the same routing protocol coexist for a destination network? This section is often tested by CCNAs, mostly in the form of listing multiple entries in the routing table and then asking where packets destined for a particular IP address will be sent.Keeping the routing principles in this section in mind, such questions will be solved. The router performs routing according to the following routing principles.(1) Subnet Mask Longest MatchThat is, if a destination address is covered by more than one destination network, it will give preference to the route with the longest subnet mask, matching more precisely. For example, there are two networks that reach 10.0.0.1: 10.0.0.0/24's next hop is 12.1.1.2, 10.0.0.0/16's next hop is 13.1.1.3, the router trusts the route with the longest subnet mask 10.0.0.0/24, because the mask length 24 is greater than 16, the router sends the packet to 12.1 zoom 2. If If the router has packets sent to 10.0 zoom 1, will choose 10.0.0.0/16 route, because the destination address 10.0.1.1 is not included in the route entry 10.0.0.0/24.(2) Minimum administrative distance priority In the case of the same subnet mask length, the router gives preference to the route with the small administrative distance. For example, the route arriving at10.1.1.0/24 has two routes, one is learned via RIP and the other is learned via OSPF, then the router trusts the route learned by OSPF because it has a smaller administrative distance 110,RIP's administrative distance is 120.Will both the R1P and OSPF learned routes about 1000.0/24 appear in the routing table? The answer is no, because only the best routes are stored in the router, and only the routes learned by OSPF will appear in the routing table. There is no conflict between this entry and the first one; the route entries 10.0.0.0/16 10.0.0.0/24 have different mask lengths, and they are different routes148 4Phosphor Chapter 5 Routing Protocols***