Which of the following statements regarding the stub area and NSSA in OSPF is false?

The Type 5 LSA cannot be flooded to a stub area, but can be flooded to an NSSA.

The Type 3 LSA can be flooded to a stub area and an NSSA.

The Type 4 LSA cannot be flooded to a stub area and an NSSA.

The Type 7 LSA cannot be flooded to a stub area, but can be flooded to an NSSA.

Type 5 LSAs in OSPF are used to transmit external routes. Which of the following statements regarding Type 5 LSAs is false?

A Type 5 LSA contains the FA address, which is 0.0.0.0. The FA address is reserved only and does not take effect.

Type 5 LSAs are advertised by ASBRs and flooded on OSPF networks except stub areas and NSSAs.

Filtering policies can be configured on ABRs or ASBRs to filter Type 5 LSAs.

A Type 5 LSA contains the FA address, which is 0.0.0.0. The FA address is reserved only and does not take effect.

Routers in the same area as the ASBR can calculate external routes through intra-area LSAs and Type 5 LSAs.

Which of the following statements regarding the stub area in OSPF are true?

A virtual link cannot pass through a stub area.

A backbone area cannot be configured as a stub area.

A virtual link cannot pass through a stub area.

A backbone area cannot be configured as a stub area.

Type 7 LSAs cannot be flooded to a stub area.

Which of the following statements regarding BGP confederations is false?

By default, sub-AS numbers of a confederation are advertised to BGP peers outside the confederation.

A BGP confederation divided an AS into several sub-Ass. Ass outside a confederation still consider the confederation as an AS.

Confederations can easily detect routing loops inside an AS because EBGP is run between sub-AS's.

Sub-Ass within a BGP confederation can use private AS numbers. For Huawei NE and AR routers, a maximum of 32 sub-Ass can be configured in a BGP confederation.

Which of the following statements regarding IS-IS route leaking are true?

IS-IS route leaking can be configured in IPv6 environments.

In IS-IS route leaking, the routes to be leaked cannot be summary routes.

IS-IS route leaking will not cause neighbor flapping.

IS-IS route is used to prevent route loops.

IS-IS route leaking can be configured on Level-1 routers.

Which of the following statements regarding IS-IS LSP fragment extension is true?

LSP fragment extension enables an IS-IS router to generate multiple LSP fragments to carry more IS-IS information.

An IS-IS router can generate a maximum of 1024 LSP fragments.

LSP fragment extension is implemented by adding virtual systems, with a maximum of 1000 virtual systems supported.

LSP fragment extension is also valid for Hello PDUs.

Which of the following statements regarding IS-IS route summarization is true?

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

Route summarization takes effect only on Level-2 routers.

Route summarization takes effect only on Level-1 routers.

Route summarization takes effect only on Level-1-2 routers.

Which of the following statements is true according to the topology shown?

Because routing summarization is configured on R2, only the routing entry 10.0.0.0/16 exists in the IP routing table of R1.

Routing entries 10.0.3.3/32 and 10.0.0.0/16 exist in the IP routing table of R1.

Routing entries 10.0.2.2/32 and 10.0.3.3/32 exist in the IP routing table of R1.

Because routing summarization is configured on R2, only the routing entry 10.0.0.0/16 exists in the IP routing table of R1.

Routing entries 10.0.2.2/16 and 10.0.0.0/16 exist in the IP routing table of R1.

Which of the following statements regarding BGP attributes is true?

When advertising a route learned from an EBGP peer to an IBGP peer, the BGP speaker does not change the Next_Hop attribute of the route.

A route can have only one value for the Community attribute.

The number of the neighboring AS is displayed to the right of the AS_path list of a BGP routing entry.

The Local_Pref attribute is exchanged only between EBGP peers and is not advertised other Ass.

When advertising a route learned from an EBGP peer to an IBGP peer, the BGP speaker does not change the Next_Hop attribute of the route.

Which of the following statements regarding the packet processing method in the MPLS network model are false?

The device discards IP packets that enter the MPLS domain.

An LSR does not remove any label.

A Label Switched Path (LSP) is determined and established through various protocols during the packet forwarding process.

Both LERs and LSRs distribute labels.

On an intra-AS MPLS BGP VPN, data packets are encapsulated with two MPLS labels before being sent to the public network. Which of the following statements regarding the labels is false?

By default, a router assigns the same label value to all VPNv4 routes destined for the remote PE.

The egress PE uses the inner label to determine the egress CE which packets are sent.

Two labels are used on an MPLS BGP VPN: public network label (outer label) and VPN label (inner label).

VPN labels are distributed by MP-BGP when routing information is transmitted. Public network labels are distributed by LDP.

As shown in the figure below, an enterprise wants to implement secure access between the headquarters and branches through MPLS VPN. VPN traffic of branches must be forwarded through the headquarters for traffic monitoring. Which of the following statements regarding this solution is false?

When the Hub-CE and Hub-PE use EBGP to transmit routing information, the Hub-PE must be able to accept routes with the AS number repeated once so that routes advertised by the Hub-CE can be received.

OSPF can be used to exchange routing information between Hub-CEs and Hub-Pes as well as between Spoke-Pes and Spoke-CEs.

BGP can be used to exchange VPN routing information between CEs and Pes.

The MP-IBGP peer relationship can be established between Spoke-Pes to exchange VPN routing information.

Which of the following statements regarding the inter-AS MPLS VPN are false?

In inter-AS VPN Option C solution 2, if only LDP is used to advertise public network labels, three labels need to be used during packet forwarding.

In inter-AS VPN Option B mode, an MP-EBGP peer relationship needs to be established between two ASBRS.

In inter-AS VPN Option B mode, two ASBR-Pes are interconnected through multiple interfaces (including sub-interfaces), each interface is associated with one VPN, and each ASBR-PE considers the remote device as a CE.

In inter-AS VPN Option A mode, the routes advertised between two ASBRs are common IPv4 routes.

In inter-AS VPN Option C solution 2, if only LDP is used to advertise public network labels, three labels need to be used during packet forwarding.

Which of the following statements regarding LDP reliability is false?

By default, the policy for manually configuring LDP FRR specifies that backup routes with 32-bit addresses should trigger the setup of a backup LDP LSP.

Synchronization between LDP and IGP requires suppression of IGP route advertisement to achieve consistent LDP and IGP.

LDP FRR can generate an LSP as the backup of the primary LSP based on Label Mapping messages that are not from the optimal next hop. LDP FRR establishes forwarding entries for the backup LSP.

LDP Graceful Restart (GR) leverages the separation of the forwarding plane and control plane by MPLS to ensure uninterrupted traffic transmission during a protocol restart or active/standby switchover.

The display mpls lsp command is run on a router to check LSP information. The command output is as follows: Which of the following statements is true?

When sending a data packet with the destination IP address 4.4.4.4, the router sends it directly without any label added.

After receiving a data packet with label 1024, the router changes the label to label 1027 and then sends the packet.

When sending a data packet with the destination IP address 2.2.2.2, the router sends it directly without any label added.

When sending a data packet with the destination IP address 3.3.3.3, the router adds label 1026 to the packet before sending it.

If PIM-SM is enabled on a multicast network, only after multicast tress are established between the multicast source and receivers, the receiver can receive multicast data. Which of the following statements regarding the trees are true?

An RPT is established between the RP and receivers.

An SPT is established between the multicast source and RP.

An RPT is established between the RP and receivers.

An SPT is established between the RP and receivers.

An SPT is established between the multicast source and RP.

An RPT is established between the multicast source and RP.

SSM is enabled on the entire IP multicast network. Which of the following statements regarding SSM are true?

SSM is applicable to one-to-many applications.

SSM is recommended when multiple sources are available on the network and the multicast route is simple.

SSM is applicable to one-to-many applications.

What advantages does IGMPv2 have over IGMPv1?

The Source-Specific Query message is added.

The Group-Specific Query message is added.

The maximum response time field is added.

Which of the following operations can implement fast fault detection on a multicast network?

Set up BFD for PM sessions between PIM SM neighbors.

Shorten the holdtime of Join or Prune messages.

Shorten the interval for sending Join or Prune messages.

Shorten the interval of PIM Hello messages.

Set up BFD for PM sessions between PIM SM neighbors.

Which of the following attacks are DoS (Denial of service) attacks?

Source IP address spoofing attacks.

A bookstore provides a wired network for customers to learn online. However, some users are suddenly unable to access the network. After troubleshooting, it is found that all the IP addresses in the DHCP address pool have been used up. Which of the following is the best way to solve the problem?

Limit the maximum number of DCHP snooping binding entries that can be learned on an interface.

Configure static ARP binding entries

Limit the maximum number of DCHP snooping binding entries that can be learned on an interface.

Which of the following statements regarding the VXLAN gateway is false?

VXLAN Layer 2 gateways enable tenants to access VXLAN and are used for communication between subnets on the same VXLAN.

VXLAN Layer 3 gateways can be classified into centralized and distributed gateways.

VXLAN Layer 3 gateways allow their inter-subnet VXLAN communication and access to external networks.

VXLAN Layer 2 gateways are bound to VPN instances.

VXLAN Layer 2 gateways enable tenants to access VXLAN and are used for communication between subnets on the same VXLAN.

Subnets of one subnet is as follows: RT=10:10 both and TR=1000:1000 export in the EVPN instance and RT=100:100 in the VPN instance. Which of the following configurations can be made for another subnet?

1000:1000 both in the EVPN instance

1000:1000 both evpn in the VPN instance

1000:1000 export in the EVPN instance

Huawei H12-261 Practice Test 3 - Free Online Exam Prep & Questions

Question 1 / 40

Which of the following statements regarding Filter-policy is true?

An IP-prefix list can be used to filter routes or filter traffic.

Filter-policy can be used on an ASBR in OSPF to filter Type 5 and Type 7 LSAs.

Filter-policy can filter received or advertised link state information, and route attributes can be modified.

Only the default routes match the IP prefix list configured using the ip- ip-prefix 1 deny 0.0.0.0 less-equal 32 command.

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