ccna 200 301 syllabus design and material development in early childhood

ccna 200 301 syllabus design and material development in early childhood.DR for a network segment, and possibly BDR for another segment.The EthemetO and Ethernet 1 of the Core_Router router are in different multiple access networks, and both networks need to elect DR and BDRoACE QUESTION Q: A network administrator configures the OSPF router in the diagram. the OSPF process has begun and the network is configured in area 0. the network administrator has several options for ensuring that RouterB can become the DR in the 172.16.1.0 /24 segment.What task is used to accomplish this configuration (choose three)? OSPF needs to elect DRs and BDRs under shared media, and this election process is done by comparing priorities and RIDs. The higher the priority the more likely it is to be elected as DR, the interface with priority 0 does not participate in the election of DR, if the priority is the same then compare their RIDs, the larger the RID the higher the priority. The election process of RID has been introduced in the previous exam questions. In the exam question, you need to ensure that RouterB becomes the DR of network 172.16.1.0/24, according to the above explanation, you can see that the ways to make it the DR are: change the priority of RouterB's Fa0/0 to the largest; change the priority of other interfaces on the 172.16.1.0/24 segment (that is, RouterA and RouterC's Fa0/0 interfaces) to have priority 0; set RouterB's RID to maximum. Again, because the OSPF process has already started and the DRs and BDRs in the network have already been elected, even if the router's interface priority or RID is modified, it will not necessarily cause the DRs and BDRs to be re-elected. In order for the DR and BDR to be re-elected in the network, you need to restart RouterA and RouterC, or use theThe "uclearipospfprocess" command restarts the OSPF process on both routers. In summary, the ACE is correct, the F option is wrong in saying that no further configuration is required, and the steps in the configuration ACE do not cause the DR to be re-elected.Question C asks why, according to the output, RouterA is not elected as DR?From the output of the ushow ip ospf interface command, you can see that RouterA's RID is 221.130.149.10,the network type is broadcast (DR and BDR need to be elected),in the 190.172.32.0/24 network segment. RouterA is the BDR,the priority of the interface is 1, the DR is 208.149.23.194, and the IP address of the DR's interface on that segment is 190.17232.10.Consider the DR's electionprocess, the first thing to consider is the priority of the interface, assuming that both interfaces have the same priority, the RID is considered,the higher RID will be elected as DR,RouterA's RID is 221.130.149.10,higher than DR's RID 208.149.23.194,which shows that the assumption is wrong275,incorrect, the DR's interface priority is higher than RouterA's interface priority, that is, option C is correct. Option A says that it is because RouterA's IP address 190.172.32.11 on the 190.172.32.0/24 segment is higher than the DR's IP address 190.172.32.10, which is incorrect, and the DR's election is related to the RID, not the specific IP address of the segment interface; Option B mentions the OSPF process number, and the DR's election is not related to the Option D says that RouterA does not advertise the interface with the IP address 221.130.149.10. From the output of the "show ip protocolsw command, you can indeed see that RouterA does not advertise this interface in its OSPF process, but whether an interface is advertised to the OSPF It is particularly noteworthy that many question banks incorrectly treat D as the correct option.10. Solution: EQuestion Q: Referring to the diagram, suppose all router interfaces are normal and correctly configured, and router R2 is also correctly configured with OSPF,R1's OSPF configuration is as shown in the diagram, how will the configuration of the default route on R1 affect the operation of R2? The "iproute0.0.0.0O.O.O.Oserial. /." command configures a default route that exits serial0/0,which is actually a misconfiguration here; in a realistic environment, the outgoing interface of the default route should be serialO/l. The "defhult.infbrmatioii originatew command on R1 issues a default route to other OSPF domains in the OSPF router to issue a default route, an OSPF default route to R1 will be learned on R2. When R2 receives any destination segment that is not in the routing table, it forwards the packet to R1, which also does not have such a route, and forwards the packet to R2 again based on the outgoing interface of the default route, thus forming a loop of routes.11. Solution: ADE