Online H12-891_V1.0 Questions Video

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Question 52

Port isolation technology deployed in Ethernet can realize Layer 2 interoperability and Layer 3 isolation, making networking more flexible.

Options:

TRUE

FALSE

Question 53

Which is the correct description of optimal routing election for each protocol in the following options?( Radio).

Options:

Route entries in BGP that are unreachable for the next hop are also placed in the IP routing table.

In the

BGP protocol, the best route to reach the same destination circumference is selected by comparing the cost values of the route entries.

The OSPF protocol puts all the routing information in the LSDB into the IP routing table.

From BGP and OSPF, different route entries to reach the same destination segment are learned, and the optimal route is selected to join the IP route table by comparing the protocol's preference value .

Question 54

The following description of the LDPLSP establishment process is correct?

Options:

By default, LSRs are for the same FEC, and the received tag mappings can only come from the optimal next hop, not from the non-optimal next hop.

When a network topology change causes the next hop neighbor to change, the free label keep method is used. LSR can quickly rebuild the LSP by directly using the labels sent by the original non-optimal next-hop neighbor. Liberal needs more memory and tag space.

In the DoD mode of label publishing, for a specific FEC, the LSR does not need to obtain a label request message from upstream to distribute the label.

The process of establishing a D. LSP is actually to bind the FEC to the tag and advertise this binding to the LSP upstream LSR process.

Question 55

OSPF fast convergence is an extended feature to improve the convergence speed of routing, in which PRC works by speeding up routing computation by performing path calculations only on the affected nodes when the network topology changes.