Practice Free H12-222 Huawei Certified Network Professional-R&S-IENP Exam Questions Answers With Explanation

bfd enable

bfd all-interface enable

all-interface bfd enable

undo bfd all-interface disable

Each VPN instance is associated with one or more pairs of VPN Target attribute, used to control VPN routing information advertisement and reception between sites.

Ts are classified into two types: Export Target and Import Target.

Export Target and Import Target are independent from each other and support multiple values to implement flexible VPN access control.

The RT value is advertised to neighbors through the BGP extended community attribute in Update messages.

Unified wired and wireless management

Consistent service experience anytime, anywhere

Fast deployment of mobile applications

Strict hierarchical networking

Starvation attacks by changing the CHADDR field value

Bogus DHCP server attacks

TCP flag attacks

Man-in-the-middle attacks and IP/MAC spoofing attacks

Account registration

Account approval and distribution

Account authentication

Account audit and deregistration

Virtualization software configuration

SDN controller configuration

SNMP configuration

Automatic configuration

TRUE

FALSE

The label space 16-1023 is shared by static LSPs and static CR-LSPs.

The label space 1024 and higher is shared by dynamic signaling protocols, such as LDP, RSVP-TE, and MP-BGP.

When the last hop receives packets with the label control 0, it directly performs IP forwarding or forwards the packets based on the next-layer label.

When the penultimate-hop LSR performs label switching, if it finds that the label value after the switching is 3, then it pops out the label and sends the packet to the last hop.

TRUE

FALSE

The configuration is correct.

The MPLS LSR IDs of the two devices must be different.

MPLS does not need to be enabled globally.

MPLS does not need to be enabled on interfaces.

TRUE

FALSE

Customers access the enterprise network, public resources, or Internet during exchanges with or visits to the enterprise.

Citizens access the Internet through the network provided by public utilities.

Consumers connect to the Internet over the enterprise network.

Enterprise employees on a business trip connect to the enterprise network through the branch network.

The top label is removed from the MPLS label stack.

The top label is added to the MPLS label stack.

The top label is replaced with another value.

The top label is replaced with the label of another group.

FIFO

WFQ

PQ

LQ

Simple traffic classification

Complex traffic classification

On-demand classification

Service traffic classification

TRUE

FALSE

Email

Voice

SMS message

WeChat

Wide recognition by vendors

Traffic engineering capabilities

Simplifying route query on software-based routers

Using VPN services

When the average length of packets in the queue is smaller than 35, packets are discarded.

When the average length of packets in the queue is larger than 35 and smaller than 40, the drop probability of packet is 50%.

When the average length of packets in the queue is larger than 40, packets enter the queue.

When the average length of packets in the queue is larger than 40, packets are discarded.

TRUE

FALSE

Global TCP synchronization

High jitter and long delay

High cost

Packets are discarded without differentiating the priority

1-2-3-4

1-4-3-2

3-2-1-4

3-4-1-2

MPLS uses the connection-oriented control plane and connectionless data plane.

The control plane transmits route information and distributes labels. The data plane transmits packets along the created label switched path (ISP).

Switches in an MPLS domain only need to forward packets based on the label added before the IP header.

Compared with traditional IP forwarding, MPLS label forwarding greatly improves the data forwarding efficiency.

Private routes cannot communicate with each other.

Leased lines are expensive.

Bandwidth resources cannot be fully used.

The address space is overlapping.

Fragment offset

Destination address

Application protocol

Class of Service (CoS)

MPLS encapsulation in frame mode supports the TTL field. MPLS encapsulation in cell mode does not support the TTL field.

MPLS provides two processing modes on the TTL field: 1. TTL in the MPLS header copies the IP TTL value when an IP packet enters the MPLS network. 2. The ingress LER sets the TTL value in the MPLS header to 255.

The processing of IP TTL copy hides the LSR in a MPLS domain, improving the network security.

If TTL copy is disabled, users can use the tracert function to view the LSR of the MPLS domain.

0

2

5

6

Network infrastructure virtualization

Network function virtualization

Network bus virtualization

Network architecture virtualization

BE service model

IntServ model

DiffServ model

FIFO model

The interzone security policies are arranged in the order of the match, the listed first is matched preferentially.

The interzone security policy with the smaller ID is matched preferentially.

The interzone security policy with the larger ID is matched preferentially.

The interzone security policies are listed automatically based on sequence numbers. When the order is changed, the number is changed.

Reduce device and energy cost.

Shorten the network service innovation period.

Uses the unified software versions for devices and uniformly manage access tenants.

Provide services for different applications and tenants through the single platform.

Association with an interface

BFD

NQA

IP link

TRUE

FALSE

Packets with the same FEC are processed differently on a MPLS network.

FECs can be divided flexibly by source IP address, destination IP address, source port, destination port, protocol type, VPN, or any combinations of them.

MPLS classifies packets with the same forwarding processing mode into one FEC.

One FEC has only one unique label marker.

Orchestration application layer

Control layer

Logical layer

Forwarding layer

CE

PE

P

Client device

When the VRRP backup receives VRRP packet from the VRRP master, it can determine whether the master is in the normal state.

When receiving VRRP packets with the priority of 0, the backup directly switches to be the master.

The backup discards IP packets destined for the virtual MAC address.

The backup responds to IP packets destined for the virtual IP address.

During traffic control, CAR enables the device to discard the packets of which the rate is exceeded.

During traffic control, GTS enables the device to buffer packets of which the rate is exceeded into queues.

During traffic control, LR enables the device to discard the packets of which the rate is exceeded.

During traffic control, LR enables the device to buffer the packets of which the rate is exceeded and to send packets to QoS queues.