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Huawei H12-891 Practice Test - Questions Answers, Page 10

Question list

List of questions

Question 91

(0)

In cross-domain VPN-OptionB packet forwarding, two ASBRs exchange the same LSP tags once.

Question 92

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In the city, that is, mpLS BGPVPN network, when the packet enters the public network forwarding, it will be encapsulated with two layers of MPLS tags, the following description of the two layers of

Question 93

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The following description of the LDPLSP establishment process is correct?

Question 94

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What improvements have been made to the IGMPv2 protocol compared to IGMPv1? ( Multiple Choice)

Question 95

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Which of the following attacks are DoS (Denial of servioe) attacks?( Multiple choice question)

Question 96

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Configure queue-based traffic shaping, which defaults to tailing if the queue length exceeds the cache size

Question 97

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For Layer 2 VPN technology, the following statement is correct?( Multiple choice questions).

Question 98

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In the forwarding table of the switch, a MAC address can correspond to only one outlet at a time

Question 99

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How do.8021w and 8021D handle BPDUs?( Single choice questions).

Question 100

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Which of the following scenarios send free ARP messages?( Multiple choice questions).

Question 91

In cross-domain VPN-OptionB packet forwarding, two ASBRs exchange the same LSP tags once.

True

False

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In the city, that is, mpLS BGPVPN network, when the packet enters the public network forwarding, it will be encapsulated with two layers of MPLS tags, the following description of the two layers of tags, the error is ?

Private network tags are carried and distributed by MP-BGP when routing, and public network tags are distributed by the LDP protocol.

MPLS BGPVPN uses two layers of tags: public labels (also known as outer labels) and private network labels (also known as inner labels).

By default, the router assigns the same tag value to all VPNv4 routes destined for the peer

The egress PE uses the inner tag when determining which egress CE the message should be sent to.

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Question 93

The following description of the LDPLSP establishment process is correct?

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 nonoptimal 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.

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Question 94

What improvements have been made to the IGMPv2 protocol compared to IGMPv1? ( Multiple Choice)

Added maximum response time field

Added high group messages

Added specific group query message

Added a specific source group query packet

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Question 95

Which of the following attacks are DoS (Denial of servioe) attacks?( Multiple choice question)

Single packet attack

Source P address spoofing attack

Man-in-the-middle attack

Flood Attack

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Question 96

Configure queue-based traffic shaping, which defaults to tailing if the queue length exceeds the cache size

True

False

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Question 97

For Layer 2 VPN technology, the following statement is correct?( Multiple choice questions).

VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point access.

The VPLS configuration is complex and the Layer 2 network transmits BUM packets.

BGP EVPN supports features such as tenant isolation, Multi-homing , and broadcast suppression.

BGP EVPN addresses issues such as MAC address drift and multi-tenancy that VPLS cannot support.

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