According to the following scenario, which of the following statements are true?

Which of the following statements correctly describe the LDP session establishment process?

An AS-path-filter uses the regular expression ^[0-9]+$ to indicate all as-path attributes.

In the broadcast network OSPF RTA.RTB.RTC RTD DR 2. 1. 1 0 network, there are four routers in the same
network segment, and its first priority is and
Router ID 192.168.1.1.192.168.2. respectively 1.192.168.3.1 192.168.4.1. 4 and if enabled on this router,
OSPF is enabled.
The OSPF BDR is elected as

Which of the following statements is true about Eth-Trunk on Huawei devices?