Which of the following are possible causes for an MSTP failure in a LAN? (Choose three.)

MSTP is configured incorrectly.

A physical link alternates between Up and Dowm, triggering the device to send a large number of TC packets.

The MSTP-enabled device receives MSTP TC packets that are transparently sent or from the client.

MSTP is configured incorrectly.

A physical link alternates between Up and Dowm, triggering the device to send a large number of TC packets.

The MSTP-enabled device receives MSTP TC packets that are transparently sent or from the client.

The priority of the port in the specified MSTI is not configured.

Which of the following causes for VRRP group flapping is the most impossible?

Association between VRRP and BFD is configured to implement a rapid master/backup switchover.

The link where VRRP Advertisement packets are transmitted changes from Up to Down frequently.

The interval for sending VRRP Advertisement packets is small.

Association between VRRP and BFD is configured to implement a rapid master/backup switchover.

VRRP packets are discarded randomly because congestion occurs.

Which of the following statements regarding Huawei network optimization service (NOS) is true? (Choose all that apply.)

Improves network availability and performance

Which of the following statements regarding the firewall zone security level is false?

The default security level of the new zone is 1.

Only the security level of the user-defined zone can be configured.

The configured security level cannot be changed.

Two zones cannot be configured with the same security level.

Which of the following statements regarding the failure to establish a BGP peer relationship is false?

During the establishment of an indirectly connected EBGP peer relationship, the TTL of EBGP Update messages defaults to 2 and is not manually modified.

TCP port 179 may be prohibited.

An error may occur during Open message negotiation.

During the establishment of an indirectly connected EBGP peer relationship, the TTL of EBGP Update messages defaults to 2 and is not manually modified.

The peer default-route-advertise command is executed on a BGP router to advertise a default route to neighboring routers. Which of the following statements regarding the change of local BGP routing table is true?

No default route will be generated in the local BGP routing table.

An inactive default route will be generated in the local BGP routing table, but this route will not be delivered to the IP routing table.

An active default route will be generated in the local BGP routing table and delivered to the IP routing table.

No default route will be generated in the local BGP routing table.

A default route will be generated in the local BGP routing table. Whether the default route will be delivered to the IP routing table depends on the route selection result.

LSRs use various label distribution control modes to set up LSPs. Which of the following statements is false?

If the label advertisement mode is DoD and the label distribution control mode is Independent, the transit device distributes labels only after receiving a label mapping message from the egress device.

There are two label distribution control modes: independent and ordered.

If the label advertisement mode is DU and the label distribution control mode is Independent, an LSR distributes labels without waiting for labels from the downstream device.

If the label advertisement mode is DoD and the label distribution control mode is Independent, the transit device distributes labels only after receiving a label mapping message from the egress device.

If the label advertisement mode is DU and the label distribution control mode is Ordered, the transit LSR distributes labels to the ingress device only after receiving a label mapping message from the egress device.

Which of the following statements regarding different LSA types is false?

LS Ack packets contain complete LSA information.

DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.

LS Request packets contain only LS Type, LS ID, and Advertising Router.

LS Update packets contain complete LSA information.

LS Ack packets contain complete LSA information.

MPLS supports multi-layer labels and connection-oriented on the forwarding plane, therefore it is widely used. So, which of the following is not the cause forMPLS deployment?

Simplifying route query on software-based routers

Traffic engineering capabilities

Simplifying route query on software-based routers

Which of the following statements regarding multicast routing are true? (Choose all that apply.)

A multicast routing protocol is used to create and maintain multicast routes, and to forward multicast data packets correctly and efficiently.

Multicast routes form a unidirectional loop-free data transmission path from a data source to multiple receivers. This transmission path is a multicast distribution tree.

Multicast routing protocols can be divided into intra-domain and inter-domain multicast routing protocols.

A multicast routing protocol is used to create and maintain multicast routes, and to forward multicast data packets correctly and efficiently.

Multicast routes form a unidirectional loop-free data transmission path from a data source to multiple receivers. This transmission path is a multicast distribution tree.

Multicast routing protocols can be divided into intra-domain and inter-domain multicast routing protocols.

The multicast routing protocol includes the IGMP protocol.

DHCP snooping is a valid security mechanism. Which of the following attack prevention methods can DHCP snooping provide? (Choose all that apply.)

Defense against bogus DHCP server attacks

Defense against DoS attacks on the DHCP server

Source IP address check for data packets in collaboration with IPSG

Defense against bogus DHCP server attacks

Defense against DoS attacks on the DHCP server

Defense against MAC address flooding attacks

Source MAC address check for data packets in collaboration with DAI

Source IP address check for data packets in collaboration with IPSG

Which of the following causes will lead to a failure to establish BGP peer relationships?

An ACL is configured to prohibit all TCP connections between two BGP neighbor.

Two IBGP peers are not physically directly connected.

BGP synchronization is enabled on fully-meshed IBGP peers

Two BGP peers are configured with different routing Update intervals.

Which of the following statements regarding Agile Controller guest account application mode is false?

Created by employees with guest management rights

DHCP uses different types of packets to implement different functions. Which of the following is the function of the DHCP Offer packet?

The DHCP server sends DHCP Offer packets to respond to the DHCP Discover packets sent by the DHCP client, providing requested configuration parameters.

The DHCP Offer packets are broadcast by the DHCP client to detect available servers.

The DHCP server sends DHCP Offer packets to respond to the DHCP Discover packets sent by the DHCP client, providing requested configuration parameters.

The DHCP client sends a DHCP Offer packet to the DHCP server to request configuration parameters, configuration acknowledgement, or extension of the IP address lease.

The DHCP server sends a DHCP Offer packet to the client, carrying configuration parameters, such as the IP address.

Which of the following statements regarding the MPLS forwarding process is false?

If an LSP fails to forward data, the MPLS control plane responsible for LSP setup can detect this error.

The main function of MPLS forwarding plane can add labels or delete labels from an IP packet, and forward the received packets based on the label forwarding table. The forwarding plane is connection-oriented.

After an IP packet enters the MPLS network, the ingress LER will analyze the IP packet and add proper labels to the packet.

MPLS can use Ping or Traceroute to detect LSP errors and locate faulty nodes.

Which of the following statements regarding the transit node in the MPLS forwarding process is correct?

Checks the NHLFE entry to obtain the outbound interface, next hop, outgoing label, and label operation type.

Queries the corresponding the FIB table based on the MPLS label to obtain the token.

Obtains the corresponding NHLFE entry based on the token in the FIB table.

Checks the NHLFE entry to obtain the outbound interface, next hop, outgoing label, and label operation type.

If the label value is 1, the transit node directly pops out the label, processes the EXP and TTL fields, and then performs IP forwarding or forwarding by the inner label.

If the label value is higher than or equal to 15, the transit node replaces the old label of the MPLS packet with a new label, processes the EXP and TTL fields, and sends the MPLS packet to the next hop.

MPLS uses LDP to provide different label distribution modes. Which of the following statements regarding LDP label distribution control modes are false?(Choose all that apply.)

LDP label distribution cannot be controlled in independent mode.

In independent mode, an LSR cannot send label mapping messages to the upstream router before it receives label mapping messages from the next hopLSR.

LDP label distribution can be controlled in ordered mode.

In ordered mode, when an LSR is the origin of a route, it can send label mapping messages to the upstream router initiatively and does not need to wait for label mapping messages from the next hop LSR.

LDP label distribution cannot be controlled in independent mode.

In independent mode, an LSR cannot send label mapping messages to the upstream router before it receives label mapping messages from the next hopLSR.

Which of the following statements regarding advantages of IGMP snooping are true? (Choose all that apply.)

It reduces broadcast packets on a Layer 2 network and therefore conserves network bandwidth.

It enhances security of multicast data.

It reduces broadcast packets on a Layer 2 network and therefore conserves network bandwidth.

It enhances security of multicast data.

It enables separate accounting for each host.

It is not recommended because IGMP consumes many CPU resources on a Layer 2 switch.

Which are the new requirements on the enterprise network stimulated by the mobility trend? (Choose all that apply.)

Unified wired and wireless management

Consistent service experience anytime, anywhere

Fast deployment of mobile applications

Unified wired and wireless management

Consistent service experience anytime, anywhere

Fast deployment of mobile applications

Huawei H12-224 Practice Test 20 - Free Online Exam Prep & Questions

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