In the OSPF broadcast network, there are 4 routers RTA, RTB, RTC, and RTD in the same network segment, and their priorities are 2, 0, 1, and 1, respectively. The router IDs are 192.168.1.1, 192.168.2.1, 192.168.3.1 and 192.168.4.1.
If the OSPF protocol is activated on these 4 routers at the same time, the BDR selected by OSPF is _____.
A local area network has been in operation for 2 years (17,520 hours), and was out of service for 6 hours due to equipment failure. After the network was expanded and new equipment was added, it ran for another year (8,760 hours), and was out of service for another 4 hours due to a software failure. Regarding the availability of this network (Availabilit), which of the following statements are correct?
There are 4 routes in the routing table 172.16.0.0/24, 172.16.1.0/24, 172.16.2.0/24, 172.16.3.0/24.
For route aggregation, the correct route after aggregation is __________.
The following functions of the convergence layer are ______. (Choose one or more)
In the topology shown in the figure, perform the following configuration in RTA and RTB respectively:
RTA-ospf-1-area-0.0.0.1]network 192.168.0.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.1.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.2.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.3.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.4.0 0.0.0.255
RTB] acl number 2000
RTB-acl-basic-2000] rule 0 permit source 192.168.1.0 0.0.0.255
RTB-ospf-1-area-0.0.0.1] filter 2000 export
Then the impossible routes in the RTC routing table are _____
