Is the following correct statement for the VXLAN message?

The outer destination IP address is the IP address of the VTEP at the far end of the VXLAN tunnel

The destination UDP port number is 4789

VNI has 24 T bits to distinguish the VIAN segment

The outer destination IP address is the IP address of the VTEP at the far end of the VXLAN tunnel

The source UDP port number is 4789

The destination UDP port number is 4789

VNI has 24 T bits to distinguish the VIAN segment

The following statement about the Security Alliance SA in IPSec is wrong with ?

SA is uniquely identified by a triple that includes the Security Parameter Inder ,Security Parameter Inder), the source IP address, and the Security Protocol Number (ASESP) used

Use the display ipsec command to view information such as the encryption method used with another IPSEC peer, the traffic of interest, and so on.

IPSec only supports encrypting data using the pair encryption algorithm.

IpSec peers must be at a two-way SA to establish an IPSec VPN connection to close

If there are multiple recipients in a multicast group, the administrator enables the IGMP-Snooping function on the switch connecting the recipient, and when the receiver receives the universal group query packet of the queryer from the switch, how should multiple recipients respond?

All recipients will respond to the Report message

The first recipient whose response time time expires sends the Report message, the other receivers do not.

All recipients will respond to Report messages only if ICMPV2 is running.

All recipients will respond to the Report message only if IGMPvl is running.

All recipients will respond to the Report message

If you run PIM-SM in a multicast network, you need to build a multicast forwarding tree between the multicast source and the receiver to enable the receiver to receive the multicast effect, so what are the following options for the correct tree sketch for the build?

What is built between the multicast source and the RP is the SPT tree

RP and the receiver is built between the RPT tree

What is built between the multicast source and the RP is the SPT tree

RP and the receiver is built between the RPT tree

RP and the swap is the SPT tree

Is the following description of the BSR/RP mechanism correct?

PIM-SM domain can have more than one C-BSR, but only one BSR can be elected by the C-BSR that receives the C-RP Packets are collected C-one RP information

BSR advertises BSR and C-RP information to all routers in the PIM-SM domain by flooding Bootstrap packets

A C-BSR can also collect C-RP information by receiving C-RP packets

PIM-SM domain can have more than one C-BSR, but only one BSR can be elected by the C-BSR that receives the C-RP Packets are collected C-one RP information

BSR advertises BSR and C-RP information to all routers in the PIM-SM domain by flooding Bootstrap packets

A C-BSR can also collect C-RP information by receiving C-RP packets

What is the following description of LDP reliability?

Manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup ISP

LGP GR (Graceful Restart) takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device forwards without interruption when the protocol is restarted or the master-standby is reversed

Manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup ISP

The LDP ERR can also generate an ISP for a tag map from a non-optimal next hop, and create a forwarding table entry as a backup of the primary LSP

LDP and LGP linkage, the need for IGP to suppress the release of routes, to ensure that LDP and LGP paths are consistent

Regarding the mpLS handling mode of TTL, is the following description correct?

The TTL in the B. MPLS label has the same meaning as the TTL field in the head. TTL prevents mpLS networks from developing bad routing.

Pipe mode. When an IP message passes through the MPLS network, the IPTTL minus 1 is mapped to the WLSTTL field at the incoming node.

The TTL in the B. MPLS label has the same meaning as the TTL field in the head. TTL prevents mpLS networks from developing bad routing.

Unifore style, when an IP packet passes through the MPLS network, the IPTTL of the incoming node is minus l. The MPLS TTL field is a fixed value.

In MPLSVPI, if you need to hide the structure of the MPLS backbone network, you can use Uniform mode on Ingress for private network messages .

BGP4+ is running between two routers, and the neighbor relationship is normal, but the BGP routing table of the router on this side does not have a neighbor route entry.

The route entry in the peer BGP route table is non-optimal.

Peer ignore is configured on the peer

The route entry in the peer BGP route table is non-optimal.

Peer ignore is configured on the peer

The peer is configured with active-route-advertise

Which of the following options can affect the establishment of IBGP neighbors?

BGP protocol version inconsistencies

iBGP-Multi-hop is not configured

BGP protocol version inconsistencies

The correct description of configuring BGP4+ is that

The next hop of a B. BGP4 route can use the Link-Local address.

BGP4+? Router-ID ? BGP4 ? Router-IDó??

BGP4+ does not support route reflectors.

The next hop of a B. BGP4 route can use the Link-Local address.

BGP4 configures the reflector, the role positioning of the reflector and the client needs to be consistent with the configuration of BGP4

BGP4+? Router-ID ? BGP4 ? Router-IDó??

A company network runs the OSPF protocol, a project in order to understand the OSPF mechanism in the network to perform packet transfer operations, the following description of ospf messages is correct?

The interface sends a Hello packet immediately after joining the OSPF region

LS update packet synchronizes the link state database by sending detailed LSA information 2

The interface sends a Hello packet immediately after joining the OSPF region

LS update packet is sent only when the adjacency relationship is established

When an LsUpdate packet is received, the router must send an LsAck acknowledgment

LS update packet synchronizes the link state database by sending detailed LSA information 2

Regarding the Stub region in the OSPF protocol , the following statement is correct.

ASBR cannot exist in the Stub zone

Virtual connections cannot traverse the Stub region.

backbone areas that are not allowed in Stub regions cannot be configured as Stub regions.

ASBR cannot exist in the Stub zone

Virtual connections cannot traverse the Stub region.

backbone areas that are not allowed in Stub regions cannot be configured as Stub regions.

An engineer performed the ingestion operation on an OSPF router in a network of the company, is the following statement about the introduction of the routing LSA correct?

The A. Advertising Router report is set to as the Router ID of ASBR

Link State lD is set as the destination network segment address

The A. Advertising Router report is set to as the Router ID of ASBR

Link State lD is set as the destination network segment address

Using the Link State ID and Advertising Router, you can uniquely identify an LSA

Which of the following statement about isis protocol route aggregation is correct?

Route aggregation can be configured and takes effect on all types of routers

Route aggregation can only take effect if configured on Leve-1 port routers

Route aggregation can only be configured on Leve-2 routers to take effect

Route aggregation can only be configured on Leve-1-2 routers to take effect with

Is the following GR description of ISIS correct?

ISIS's GR defines a new TLV structure to support this feature.

The GR feature of AISIS is turned on by default.

ISIS's GR has a total of four timers.

ISIS's GR notifies of events and maintains neighbor relationships through CSNP messages.

ISIS's GR defines a new TLV structure to support this feature.

Both the CSNP packet of ISlS and the DD packet of OSPF have a role in the MA network, describing the role of the link state database summary, which is correct compared to the following statements of these two types of messages

OSPF is not identity bound to dr/BDR; the CSN message is generated only by DIS

Both packets need to be confirmed to the terminal router after being sent, otherwise they need to be retransmitted

Once the adjacency relationship is established, the CSRP packet and the D message will stop sending

The two packets do not need to be confirmed to the router after they are sent the master-slave relationship in the DD message interaction of

OSPF is not identity bound to dr/BDR; the CSN message is generated only by DIS

Regarding route introduction, what is the following description of the error?

ISIS, routes to Level After the 1 makes a route ingestion, if you do not manually configure the ingestion policy, a bad route will be formed.

BGP supports both import and network when generating routes, and the network mode is more precise.

By default, OSPF introduces an external route with a default metric of 1, and the level-2 network of the ingested external route type type, Type2

ISIS, routes to Level After the 1 makes a route ingestion, if you do not manually configure the ingestion policy, a bad route will be formed.

Introducing IBGP routing in OSPF may cause routing loops

The following description of the RD attribute filter for BGP is correct?

Multiple rules are matched in the order in which they are configured.

There is always an "or" relationship between the rules configured by RD-filter.

If RD-filter is not configured, but the RD-filter is referenced for filtering, the matching result is deny.

If RD-filter is configured, but the routed RD is not matched with any of the RDs defined in the rule, the default match result is permit.

Multiple rules are matched in the order in which they are configured.

There is always an "or" relationship between the rules configured by RD-filter.

The following description of the Lsp shard extension for ISIS is correct?

Enables is routers to generate more LSP shards to carry more ISIS information.

Isis' shard extension is equally valid for Hello packets.

Shard scaling for ISIS is achieved by adding virtual systems, up to 1000 virtual systems.

The isis router can produce a maximum of 1024 shards.

?? Route ? Policy ??:ip community-filter Ipermit 100: 1 ip as-path-filter 2 permit ^I00$ route-policy test permit node 10 if-match communityfilter 1 if-match as-path-filter 2 apply as-path 200 Is the above configuration description correct?

The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 and the AS-One PATH is 100 route policy? The AS-PATH nature of the matching route is changed to 200

The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 or if the AS PATH is 100 route one policy. The AS-one PATH attribute that matches the route is changed to 200

The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 and the AS-One PATH is 100 route policy? The AS-PATH nature of the matching route is changed to 200

Only if the BGP route carries an AS-PATH of 100, the BGP route matches the route one policy above. The AS-one PATH attribute that matches the route is changed to 200

As long as the BGP route carries a community attribute value of 100:1, the BGP route matches the route-policy above The AS-PATH attribute of the matching route is changed to 200

What are the main reasons why RSTP converges faster than STP?

RSTP does not converge based on timer

RSTP increases the variety of port states

RSTP does not converge based on timer

The following description of the characteristics of cross-domain VN-Optionc is correct?

VPMV4 routes are not saved on the ASBR, and VPNv routes are not advertised to each other.

VPN routes are exchanged directly between the ingress PE and egress PE and do not require an intermediate device to secure a circular VPN route.

A maximum of two layers of tags need to be used in the message forwarding process.

VPMV4 routes are not saved on the ASBR, and VPNv routes are not advertised to each other.

VPN routes are exchanged directly between the ingress PE and egress PE and do not require an intermediate device to secure a circular VPN route.

Cross-domain VN-Optionc, which is not suitable for use when spanning multiple AS.

What is the following description of MPLS incorrect?

The tag space range of dynamic signaling protocols such as LDP, M P-BGP is 16 to 1023

The length of the MPLS tag is 20 to 20 for packet forwarding.

The tag space range of dynamic signaling protocols such as LDP, M P-BGP is 16 to 1023

When using the TTL processing method of Pipe mode, the IP packet transmits the TTL of the IP packet over the IPLS network. The value is only minus 1 for the MPLS in and out nodes.

MPLS supports multi-layer label nesting, and the S bit value of the innermost label is 1.

What of the following actions can enable fast failure detection on multicast networks?

Reduce the interval at which the interface sends Hello messages

Shorten the Holdtime of Join/Prune messages

Reduce the interval at which the interface sends Hello messages

A PIM BFD session is established between neighbors

Reduce the interval between sending Join/Prune messages

If the PIM-SM protocol is running in a multicast network , you need to configure RP, and the configuration equation of RP is divided into dynamic RP and static RP. The following configuration description of the RP is correct (radio).

When configuring a static RP, you need to specify the information for the RP on all PIM routers.

When you configure Dynamic RP , you need to configure BSR as a backup of the RP.

When you configure a static RP , you need to configure the BSR to advertise the RP information.

When configuring a static RP, you need to specify the information for the RP on all PIM routers.

When you configure Dynamic RP, you do not need to configure BSR.

Huawei H12-891 Practice Test 1 - Free Online Exam Prep & Questions

What are the following advanced features supported by BGP EVPN?

ARP broadcast suppression

VRRP overVXLAN

Multi-active gateway

WI-AN Qos

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