H12-224 HCNP-Routing&Switching (Fast Track) (Huawei Certified Network Professional -Routing&Switching) Questions and Answers

AF21

AF22

AF23

AF21 AF22 and AF23 traffic

A BGP Speaker advertises all BGP mutes to new peers immediately after they establish BGP connections

A BGP Speaker advertises all BGP routes to its peers

Generally when multiple mutes exist a BGP Speaker adds only the optimal mute into its muting table

A BGP Speaker advertises the mutes learned from an EBGP peer to all peers including

EBGP peers and IBGP peers

Virtual link can solve the problem that backbone areas are logically non-contiguous.

A virtual link can be established between any two ABRs, but the two routers must have interface that are connected to the same non backbone area. routers must have interfaces that are connected to the same

A virtual link unnecessarily belongs to the backbone area, Instead, which area It belongs to depends on the actual topology.

A virtual link belongs to Area 0.

Storage device

Network device

Server

Air conditioning system

Enable DHCP globally

Configure the DHCP option 82 field

Configure the globally address pool if the DHCP server based on the global address pool is used.

Configure the interface address pool if the DHCP server based on the interface address pool is used.

as-path-filter

IP-Prefix

Route-policy

Policy-based-route

150

100

80

40

in idle state, bgp denies all connection requests, this is the initial state of bgp.

In active state bgp attempts to establish a tcp connection, this is the intermediate state

of bgp.

in established state, bgp peers can exchange update, route-refresh, keepalive, and

notification message.

A BGP peer relationship can be established only when both

BGP peers are in open confirm state, two bgp peers send update messages to exchange

routes.

this route must exist in the IP routing table and be the optimal route.

this route must match the specified prefix and does not need to accurately match the mask length.

this route must accurately match the specified mask length.

this route must be on IGP route.

Mirrored port

Local observing port

Remote mirroring port

Trunk port

TRUE

FALSE

Route-refresh

Open

Keepalive

Update

All the routers in the same AS must use the same password

A pair of BGP peers must use the same plaintext password

All BGP peers of a router must use the same password

A pair of BGP peers must use the same MD5 password

Packets received by a port

Packets sent by a port

Packets received and sent by a port

Packets discarded on a port

Other pots except the edge port participate in MSTP calculation

A port can function as different roles in different MSTIs

A regional edge port is located at the backup of the root port and provides a path from the designated to the root bridge

The backup port functions as the backup of the root port and provides a path from the designated bridge to the root bridge

Label distribution router

Label edge router(LER)

Label switching router(LSR)

Label transmission router

Project initiation

Bid release

Contract signing. Preliminary project acceptance

Part number

Part model

Number of parts

Project name

TRUE m ill

FALSE

TRUE

FALSE

BGP does not accept the mutes whose AS_Path attribute contains the local AS number

Next hop is a well-known mandatory attribute of BGP mutes

The AS. Path attribute records all the ASs that a BGP route passes through on the transmission path In route selection rules a route with a shorter AS

The AS_Path attribute records all the ASs that a BGP route passes through on the transmission path In route selection rules a route with a shorter AS_checked in IBGP

TRUE

FALSE

Port isolation controls access between interfaces of switches

Port isolation prevents the computers connects to differ faces from accessing each other

Port isolation can be configured based on VLANs

Port isolation is an isolation mechanism at the physical layer

BGP uses a reliable transport protocol

BGP supports automatic neighbor discovery

BGP supports plaintext authentication

BGP supports rich routing policies

AS_Path is a list of ASs that a BGP route passes through

AS_Path is a very important well-known mandatory attribute in BGP

BGP does not accept the routes whose AS_Path attribute contains the local AS number

When a router has two or more routes to the same destination router compares the

AS_Path attributes of these routes

Time plan

Personnel arrangement

Migration process

Risk control measures

Exchange rate change

Rainstorm disaster

Social unrest

Differences of industrial standards

The stateful inspection firewall needs to match the rules for each incoming packet

Because UDP is a connectionless protocol so the stateful inspection firewall cannot match UDP packets with the status table

When the stateful inspection firewall checks packets of one same connection are not correlated

The stateful inspection firewall only needs to match the first data packet against a rule and the subsequent packets of the conned

TRUE

FALSE

Separated forwarding and control layers centralized control and open interfaces

Separated forwarding and control layers distributed control and open interfaces

Centralized forwarding and control layers centralized control and open interfaces

Separated forwarding and control layers centralized control and closed interfaces

Migration preparation

Migration implementation

Rollback solution

Contingency plan

TRUE

FALSE

The lease renewal timer is 50% of the total lease. When the release timer expires, the DHCP s

The rebinding timer is 87% of the lease.

If the rebinding timer expires but the DHCP client does note receive any responses from the DHCP server address to it before until to total lease expires.

If the DHCP client receives a DHCP NAK packet within the lease the client stops using the current IP address.

TRUE

FALSE

An access control list (ACL) matches routing information or addresses is data packets

to filter out router or data packets that do not meet matching conditions

An IP prefix matches destination addresses of routes or directly applies to a router object (gateway)

An AS-Path filter matches the AS-Path attribute in BGP mutes so it can only filter BGP mutes.

A community-filter matches community attributes in BGP routes, so it can only filter

BGP mutes.

A route-policy can only match mutes and data packets, but cannot route attributes or forwarding behaviors for data packets

STP automatically runs by default and therefore does not require configuration

The STP convergence speed is slow which may cause network interruption. Therefore, disabling STP is a preferred solution

Similar to the implementation for routing Protocols data flows between switches can be adjusted by modifying link costs

For routine STP configuration the position of the STP blocked port is controlled to ensure that the blocked port is not located on a backbone link or device

The RSTP algorithm is simple and reliable and supports fast convergence. Therefore, all switches on the network are configured to work in RSTP mode.

Packets are flooded on the entire network

The aging time of MAC address entries is changed.

Some MAC address entries are deleted.

The entire MAC address table is deleted.

IDS

PS

FW

VPN

Accuracy

Good portability

Verification

Rollback

Check the port configuration to verify that the MSTP-enabled port is configured (for example using the bpdu enable command) to

The port connected to a user device has MSTP disabled or is configured as the edge port

The BPDU tunnel configuration has no impact on MSTP

Check whether the interface is added to the correct VLAN

route-policy

IP- prefix

as-path-filter

community-filter

IS-IS supports various area features

IS-IS packet format is simple

IS-IS is suitable for large-capacity route transmits

IS-IS has good scalability

DSCP priority

IP precedence

MPLS EXP priority

802.Ip priority

True

False

Energy expenses

Line construction expenses

Line lease expenses

Equipment depreciation expenses

Staff expenses

The DiffServ model provides different services destined for different destinations.

The DiffServ model provides different services destined for different sources.

The DiffServ model does not need to maintain the status of each flow.

The DiffServ model applies to large-scale backbone network.

The jitter is relevant to the delay

The jitter occurs because the E2E delays of data packets in the different flow are different Cs A long delay indicates a short jitter and a short delay indicates a large jitter

Jitter is independent of delay

TRUE

FALSE

Key risk positions

Risk impact scope

Risk impact time

Loss caused by risks

TRUE

FALSE

LDP label distribution can be controlled in ordered mode

ln ordered mode when an LSR is the origin of a route it can send label mapping messages to the upstream router in

LDP label distribution cannot be controlled in independent mode

ln independent mode an LSR cannot send label mapping messages to the upstream router before it receives label m

There is no unicast route from RTB to RTA

RTA cannot learn the RP information

There is no multicast route from RTA to RTB

The RP learned by RTA is not RTB

The two routes will be both advertised to other BGP peers

One optimal route is selected from the two routes and then advertised to other BGP peers

The two routes will not be advertised to other BGP peers

One optimal route is selected from the two routes and then advertised to IBGP peers

TRUE

FALSE

The hop count must be greater than

The hop count must be greater than2

The hop count must be greater than 15

The hop count must be greater than 255