a+ ccna salary

a+ ccna salary.interfaceserial 0/0/0ip address 10.1.12.1255.255.255.0 !interfaceserial 0/0/1ip address 10.1.13.1255.255.255.0 Irouter osp???1network 10.1.2.10.0.0.0area 0 network 10.1.12.1 0.0.0.0 area23 network 10.1.13.1 0.0.0.0 area23 network 10.1.14.1 0.0.0.0.0 area4 router-id 1.1.1.1.1 passive-interfacegigabitethernet0/0.11 passive-interface gigabitethernet0/0.12Focus on the network command in the shaded portion of the example. All 5 commands happen to use the wildcard mask 0.0.0.0, which means that each command requires a specific match to the IP address listed. If you compare these network commands with the individual interfaces, you can see that the configuration is OSPF enabled, the subinterfaces G0/0.11 and G0/0.12 are in area 0, the two serial interfaces are in area 23, and R1's G0/1 interface is in area 4.Tip: Many people are used to using 0.0.0.0 as a wildcard mask on the network OSPF command, requiring an exact match of each interface's IP address, as shown in Example 8-3. This style of configuration makes it more obvious which interfaces match exactly which network command.Finally, note that the R1 configuration also sets its RID directly so that its two LAN subinterfaces are set to passive. So, what is the obvious difference between single-area and multi-area OSPF configurations? Almost none. The only difference is that the multi-region ABR's network command lists out different regions.Verifying Multi-Region Configurations The next few pages explore how to verify some of the new OSPF features introduced in this chapter. To perform OSPF verification in more detail, please