As shown in the following figure, router A and router B establish an OSPF neighbor relationship. The OSPF process number of router A is 1, and the area number is 0. Which of the following configurations on router A can enable router B to obtain the network segment of host A routing? (Multiple choice)

The RSTP protocol uses the P/A mechanism to speed up the speed of the upstream port to the Forwarding state, but what is the reason why there is no temporary loop?

As shown in the figure below, all switches enable the STP protocol and keep other configurations in their default state. When the network is stable, which of the following statements are correct? (Multiple Choice)

What is the length of the Ethernet_II frame containing the Ethernet header?

Apply the ACL configured as shown in the figure in Telnet. Only the device with the IP address of 172.16.105.2 is allowed to log in remotely:
#
acl number 2000
rule 5 permit source 172.16.105.2 0
#