A.The backup port is the port that is blocked because it learns that other bridges send to configure BPDUs.

B.The provisioning port is the port blocked by learning the configuration BPDUs sent by other bridges.

C.The standby port is the port blocked because it learned to send it to the configuration BPDU.

D.The backup port is the port that is blocked because it learns to send it to the configuration BPDU.

A.Bootstrap

B.Assert

C.Register Stop

D.Graft

A.If one of the root ports in the network fails, the optimal alternate port in the network will become the root port and enter the Forwarding state.

B.In RSTP, after a port is elected as a designated port, it first enters the Discarding state, and then quickly enters the Forwarding state through the Proposal/Agreement mechanism.

C.If a designated port in the network fails, the optimal alternate port in the network becomes the designated port and enters the Forwarding state.

D.The concept of an edge port was introduced in RSTP. An edge port does not receive processing configuration BPDUs and does not participate in RSTP operations. It can change from Disable to Forwarding state.

E.When a port receives an RST BPDU from an upstream designated bridge in RSTP, the port compares the stored RST BPDU with the received RST BPDU.

A.The scalability of the protocol is better

B.More types of areas are supported

C.More types of network are supported

D.Less protocol packets

A.In the PIM-SM network, the newly started multicast router needs to use Hello messages to discover neighbors and maintain neighbor relationships.

B.The Hello message is sent to the multicast address 224.0.0.5.

C.Periodically use Hello messages to keep in touch with each other.

D.Election of DR-designated routers in a multi-router network segment through Hello messages.