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HCIE-Routing & Switching (Written) V3.0 Questions and Answers

Question 1

existingRoute-policy is as follows:

ip community-filter 1 permit 100:1 ip as-path-fiter 2 permit ^100$ route-policy test permit node 10 if- match community-filter 1

if-match as-path-fiter 2

apply as-path 200

Which of the above configuration descriptions is correct?

Options:

Only when the BGP route carries the community attribute value of 100:1 or the AS-PATH is 100, The BGProad will match the aboveroute The AS-PATH attribute of the -policy matching route will be changed to 200

Only when the BGP route carries the community attribute value of 100:1 and the AS- When PATH is 100, the BGP route will match the aboveThe AS-PATH property of route-policy matching routes will be changed to 200

Only when the BGP route carries an AS-PATH of 100, the BGP route will match the aboveroute-policy. AS_ that matches the route The PATH property will be changed to200

As long as the BGP route carries the community attribute value of 100:1, the BGP routeroad will match the aboveroute-policy matches the AS-PATH attribute of the routeSex will be changed to 200

Question 2

A company's two-layer phase network signature is shown in the figure. After the engineer has completed the configuration, it is found that the business between departments cannot communicate. The device status can be checked through the command as follows. Please determine the possible causes?

Options:

Inconsistent BPDU interval configuration between switches

Instanc between transfer machinese VLAInconsistent N mapping configuration

between switchesRevislon Level configuration is inconsistent

between text changersRegion Name configuration is inconsistent

Question 3

The MSTP switch regards the RSTP switch as an MSTP domain composed of a single switch, and the MSTP switch parses the RSTBPDU into MSTBPDU, where the IRPC is 0.

Options:

True

false

Question 4

How many interfaces of the router have IS-IS enabled, the output is as follows:

Options:

Question 5

The following is about cross-domain VPN-Option The characteristics of C, the description is correct?

Options:

A maximum of two layers of labels are required during packet forwarding.

The ASBRs do not store VPNv4 routes, nor do they advertise VPNv4 routes to each other.

VPN routes are directly exchanged between ingress PEs and egress PEs, without the need for intermediate devices to store and advertise VPN routes.

Cross-domain VPN-Option The C method is not suitable for use when spanning multiple ASs.

Question 6

The HW device network administrator plans to migrate the multicast network from IGMPv2 to IGMPv3. What is the improvement of IGMPv3 compared to IGMPv2? .

Options:

IGMPv3 adds the function of specifying a multicast group not to join a specific multicast source for a host

IGMPv3 adds the function of specifying a multicast group for a host to join a specific multicast source

IGMPv3 adds between source and local IGMP queriersRequest-to-send andClear-to-send

IGMPv3 removed for membership reportingReport-suppression Features

IGMPv3 removes the ability to join all sources with a wildcard in a multicast group

Question 7

VRRPThe priority cannot be set to 0. The device that sends the VRRP priority of 0 stops participating in the VRRP backup group, and notifies the backup device to become the master device as soon as possible without waiting for the Master-Down-Interval timer to expire.

Options:

True

false

Question 8

As shown in the figure, there is a PPP link between R1 and R2, and the direct-connected interfaces are not in the same network segment, but the direct-connected interfaces of R1 and R2 can communicate, but the Ethernet link cannot communicate with the same IP plan. The reason is that? (multiple choice)

Options:

The interconnected POS ports of R1 and R2 learn the 24-bit subnet route of each other's directly connected ports through IPCP

The interconnected POS ports of R1 and R2 learn the 32-bit host route of each other's directly connected ports through IPCP

The interconnected POS ports of R1 and R2 learn the MAC address of the peer interface through LCP, and do not need to use ARP to request the MAC address

The data packets of the interconnected POS ports of R1 and R2 do not need to encapsulate the Ethernet header, and do not need to use ARP to request the MAC address

Question 9

Different IS-IS of the same routerBetween processes, link state information is isolated by default.

Options:

TRUE

FALSE

Question 10

Which of the following statements about the tail of ISIS protocol LSP packets is correct?

Options:

LSP fast diffusion feature, first diffuse LSPs less than the specified number to speed up the synchronization process of LSDB

by configurationAn intelligent timer generated by LSP, which can automatically adjust the delay time according to the changing frequency of routing information

When the link state information increases, the packet length of the LSP can be increased, so that each LSP can carry more information.

Decreasing the minimum time interval for sending LSPs by port can speed up the diffusion of LSPs.

Question 11

In an MPLS VPN network, different CE devices can use different routing protocols to exchange routing information with the same PE device, and the routing protocols used between different CE devices and the same PE device are independent of each other.

Options:

True

false

Question 12

Which of the following IEEE standards are formulated for Gigabit Ethernet?

Options:

802.3z

802.3ab

802.3ad

802.3af

Question 13

Regarding BGP4+, which of the following statements is correct?

Options:

BGP4+ carries the next hop address of IPv6 routes through the Next_hop attribute

There is no Next_hop attribute in BGP4+

BGP4+ carries the next hop address of the route through the Network Address of Next Hop in the MP_Reach_NLRI attribute

BGP4+ carries the prefix and mask length of IPv6 routes through the NLRI attribute

Question 14

If you need to designate a member switch as the master switch of the stack on Huawei S series switches, you can power on the switch first, and then power on the other member switches after 20 seconds.

Options:

True

false

Question 15

Regarding the command of 0SPF route aggregation, the correct description is:

Options:

not-advertise is the default parameter of the abr-summary command, that is, if the abr-summary command does not specify advertise, the default is not-advertise

advertise is the default parameter of the abr-summary command, that is, if not-advertise is specified in the abr-summary command, the default is advertise

The abr-summary command is a command in the OSPF area view.

The asbr-summary command is a command in the OSPF view.

Question 16

Which of the following descriptions about BGP load sharing is wrong?

Options:

ASs that form load-balancing equal-cost routes. The -Path property must be different.

If the destination network segment is the same, load balancing can be formed between BGP routes from different sources.

If BGP load balancing is implemented, pee needs to be configured when the local device advertises routes to the IBGP peer grouprnext-hop-local command only Change the next hop address to own address.

IBGP routes and EBGP routes to the same destination on the public network can form load balancing.

Question 17

As shown in the figure, the router load shares the communication traffic between branch network 1 and branch network 2. In this case, configure the configuration on the physical interface of the router.

URPF must use loose mode to prevent source IP address spoofing attacks.

Options:

True

false

Question 18

There are many transition technologies in the process of replacing IPv4 addresses used in the network with IPv6 addresses. These technologies are divided into two categories, one is IPv4/Pv6 coexistence technology, the other is IPv4/Pv6 interworking technology, which of the following options belong to IPv4/IPv6 coexistence technology? (multiple choice)

Options:

NAT64

IPv46 over IPv44

Dual Stack

ISATAP

Question 19

The following about MED The correct one is: (multiple choice) A. MED can only be transmitted in this AS

B. The default value of MED is 100

C. The default value of MED is 0

D. MED is an optional non-transitive attribute

Options:

Question 20

If the network runs the OSPF protocol, configure the non-backbone area in the OSPF area as Totaly After the stub area, ABThe R router will send Totally An L is delivered to the stub areas Id 0.0.0.0 LSA, which type of LSA does this LSA belong to??

Options:

LSA3

LSA1

LSA5

LSA2

Question 21

In PIM-SM , the following about PIM Join Message. Is the description correct? (single choice)

Options:

PIM Join information.Every 60 Sent once per second to refresh the upstream router m for the multicast treeroute State

PIM Join message per 3 Sent once every minute to refresh the upstream router mroute for the multicast tree State

the upstream router sends a PIMJoin acknowledgement in response to each received from the downstream router

PIM Join message PIM Join message. Only sent when the multicast tree is first established

Question 22

Options:

R2 is in the area 0 generated inType3 LSAcontains 10.0.2.2/32routing information

R2 is in the area 0 generated inType2 LSAcontains 10.O.2.2/24routing information

R2 is in the area 0 generated inType1 LSAcontains 10.0.2.2/32routing information

R2 is in the area 0 generated inType5 LSAcontains 10.0.2.2/32routing information

Question 23

Which of the following technologies can improve the reliability of MPLS BGP VPN?

Options:

Configuring CE Dual-homing Networking at the Access Layer

VPN FRR

VPN-GR

PE- Private network IP routing FRR between CEs

Question 24

On a newly deployed routerWRED is configured on HW., which of the following descriptions about WRED features is correct? (multiple choice) ( confirmed)

Options:

WREDDifferent drop thresholds and packet loss rates can be set for packets with different priorities

When traffic exceeds a minimum threshold, WRED starts dropping all ingress traffic (tail drop)

Avoid global synchronization by selectively dropping multiple TCP streams

Low-bandwidth traffic is more likely to drop than high-bandwidth traffic

Question 25

LANDThe attack method is that the attacker sends a source address to the target host and the destination address is the target host, and the source port and the destination port are the same.

When the receiving end is waiting for the final ACK packet to be sent, the connection is always in a semi-connected state, resulting in a waste of receiving full and limited TCP resources.

Options:

True

False

Question 26

as the picture shows,The ISIS neighbor relationship between R1 and R2 has just been established, and the database synchronization process between R1 and R2 is correct? ( already confirm)

Options:

The packets sent by R1 to R2 are PSNP packets.

The packets sent by R1 to R2 are CSNP packets.

The packets sent by R1 to R2 are LSP packets.

The packets sent by R1 to R2 are Hello packets.

Question 27

command ip as path-filterr 1 permit ^12.*74$ can match which AS_ PATH?

Options:

AS_ _PATH (321 12 2374)

AS_ _PATH (123621 7432374)

AS_ PATH (125328 74 twenty three)

AS_ PATH (32 1274 twenty three)

Question 28

What are the reasons for the impossibility of the BGP connection being established and then going down?

Options:

An incorrect BGP packet was received.

The mandatory attribute in the routing update packet is missing.

Open packet negotiation failed.

After the BGP connection is established, the keepalive is not received within the negotiated holdtimemessage.

Question 29

The router connects two EBGP neighbors through two parallel serial cables, what method would you use to achieve this through the two parallel serial cablesBidirectional burden sharing between two connected EBGP neighbors?

BGP automatically implements load balancing of traffic among different autonomous systems on available links without using any method

Options:

Use the loopback interface to establish an EBGP neighbor relationship and configure EBGP Multi-hop, configure the loopback interface as the update source, and then use IGP to achieve equal-cost path load sharing between loopback addresses)

To configure the EBGP neighbor relationship with the loopback interface as the update source, the IGP in each AS needs to introduce two equal-cost paths to the EBGP neighbor loopback interface address; and you need to use the command "next-hop-local"

Use the command "ebgp-load on both ends"-balance"

Question 30

OSPF There will definitely not be a type of LS in the stub areaA

Options:

Type7

Type5

Type4

Type3

Question 31

Which of the following packets does the BGP protocol support?

Options:

Open

Keepalive

Update

Hello

Question 32

As shown below,R1, R2, R3 established Level2's neighbor relationship. aboutR3's IP routing table statement is correct:

Options:

The 2022::/64 route will appear in the IP routing table

The 2019::/64 route will appear in the IP routing table

The 2020::/64 route will appear in the IP routing table

The 2021::/64 route will appear in the IP routing table

Question 33

What is wrong about the functional description of OSPFv3 protocol authentication?

Options:

OSPFv3 can only use manual mode to establish SA SA

OSP for routerFv3 IPSec authentication can support not only transport mode, but also tunnel mode

OSPFv3 authentication relies on the authentication header and encapsulating security payload header of IPv6 packets

OSPThe Autype and Authentication fields are removed from the Fv3 protocol header

Question 34

The following are about 802.1x authentication. What are the correct statements about RADIUS authentication and HWTACACS authentication?

Options:

Users can use 802.1x authentication to access the network, RADIUS completes authentication.

RADIUS authentication and WTACACS authentication are mutually exclusive, and dual authentication cannot be performed for the same user at the same time.

RADIUS authentication and HWTACACS authentication can perform dual authentication for the same user at the same time, which is more secure.

RADIUS authentication and 802.1x authentication are mutually exclusive.

Question 35

Subnets under different VPNs of VXLAN need to be accessed in the same way. The information of one of the subnets is as follows, RT 10:10 both under EVPN, RT 1000:1000 export, and RT 100:100 under VPN. Another subnet can be configured as ?

Options:

Configure 1000:1000 both under EVPN

Configure 10:10 both under VPN

Configure 1000: 1000 both evpn under VPN

Configure 1000: 1000 export under EVPN

Question 36

What is the relationship between CIR, BC and TC?

Options:

CIR=TC/BC

CIR=BE/TC

TC=CIR/BC

TC=BC/CIR

Question 37

There are twoCommunity-filter:

ip community-filter 1 permit 100:1 200:1

ip community-filter 2 permit 100:1

ip community-filter 2 permit 200:1

About the above community- The correct description of filter is? ( confirmed)

Options:

As long as the community attribute value carried in the BGP route contains 100: 1 or 200: 1 or both, the BGP route will match the community- fiter 1

As long as the community attribute value carried in the BGP route contains 100: 1 or 200: 1 or both, the BGP route will match the community- filter 2

Only when the community attribute value carried in the BGP route contains 100: 1 and 200: 1, the BGP route will match the community-filter 1

Only when the community attribute value carried in the BGP route contains 100: 1 and 200: 1, the BGP route will match the community-filter 2

Question 38

Different from STP, RSTP BPDU typeonly one, its value 2, noTCN BPDU.

Options:

TRUE

FALSE

Question 39

the following aboutWhat are the wrong technical claims about URPF, IPSG and DAI?

Options:

DAI does not support manual configuration of binding tables.

A. IPSG checks the source IP address and source MA of IP packetsC address, DAI only checks the correspondence between IP and MAC.

URPF can be used to prevent DDoS false origin attacks.

IPSG technology checks IP packets to prevent source IP spoofing attacks.DAI checks the source of ARP packet filtering attacks.

Question 40

As shown in the figure, which of the following statements is correct

Options:

ifR2 Ethernet0/0/1 interface down, then R1 BFD sessions can quickly sense failures and notify R1 to bring down the OSPF neighbor relationship

When the OSPF state changes to FULL, the BFD session is triggered to go up.

ifR2 EtheThe rnet0/0/0 interface is down, then the next hop of the route from R1 to 10.0.2.2 is changed to 10.0.21.2

ifR2 disables the BFD function, and the BFD session of R1 will become down, which will cause the OSPF neighbor relationship to go down.

ifR2 Ethernet0/0/1 interface down, then the next hop of the route from R1 to 10.0.2.2 is changed to 10.0.12.2

Question 41

The multicast IP address is 239.130.130.1, the corresponding MAC address is:

Options:

01-00-5E-02-82-01

01-00-5E-82-82-01

00-00-5E-02-82-01

00-00 -5E-82-82-01

Question 42

What is wrong about the description of RRP fast switching?

Options:

Use VRRP to monitor the BFD session or EFM function. After the BFD session or EFM session status changes, the VRRP module will be notified to realize fast VRP switching

When the VRRP voice group monitors ordinary BFD, when the BFD state changes, the active and standby states will be changed by modifying the priority of the backup group. When the monitored BFD session state is restored, the priority of the router in the backup group will be restored. to the original value

A VRRP backup group cannot monitor Peer BFD, Link BFD and Norma.1BFD at the same time.

If multiple BFDs are configured to monitor at the same time, the configurations are related to each other and may affect the

Question 43

aboutRoute Policy, the following description is correct? (multiple choice)

Options:

Advanced ACL can be applied to route In policy, filter routes

entry pemit :: 0 less-equal 128 means allow all IPv6 routes to pass through

ifMore than one node is defined in Route-policy, and at least one of each node should have a matching mode of permit

Route-Policy can filter only default routes

Question 44

In the topology shown in the figure, if the entire network runs OSPFv3 without importing external routes, what type of LSA will not be generated on R1?

Options:

link-lsa

Intra-Area-Prefix-LSA

Inter-Area-Prefix-LSA

Inter-Area-Router LSA

Question 45

Which type of address prefix in the following options indicates that the address is globally unique and globally routable among IPv6 unicast addresses, similar to the public address in IPv4?web address?

Options:

::1/128

FE80::/10

C00::/7

2000::/3

Question 46

Which of the following descriptions about the LDP session establishment process is correct? (multiple choice)

Options:

When both parties receive the Keepalive message from the peer, LThe DP session is established successfully.

LThe hello message discovered by DP neighbors uses TCP packets, and the destination address is the multicast address 224.0.0.2.

TCPAfter the connection is established successfully, the active party sends an initialization message to negotiate the relevant parameters for establishing an LDP session.

The party with the larger transport address, as the active party, initiates the establishment of a TCP connection.

Question 47

Which of the following statements about routing control is correct?

Options:

use import-route BGP commands can import IBGP routes

AS-path-filter is the needle to AS-path, thus affecting the route selection.

OSPF, ISIS, and BGP can all deliver default routes.

in node 10, if-match community-filter 1 and if-match as-path-filter 1 is"with" relationship

Question 48

When deploying BGP/MPLS IP VPN, OSPF VPN route tag (VPN Route Tag) is not transmitted in the extended community attribute of MP-BGP, it is only a local concept, only when MP-BGP routes are received and OSPF is generated PE of LSArouter

meaningful.

Options:

TRUN

FALSE

Question 49

What is the main reason why RSTP converges faster than STP?

Options:

RSTP adds types of port states

RSTP has less overhead

RSTP does not converge based on timers

RSTP has smaller timers

Question 50

Which of the following descriptions about the characteristics of 802.1S deployment is correct?? (confirm)

Options:

All VLANs share one spanning tree instance

Multiple bridges share a spanning tree instance

eachVLAN owns a spanning tree instance

multipleVLANs share a spanning tree instance

Question 51

In order to allow routers at both ends of an IPv6 over IPv4 manual tunnel to exchange routing information, OSPFv3 can be enabled on the tunnel, OSPFv3 will be able to form a neighbor relationship normally, and the tunnel interface will be regarded as a P2P link interface.

Options:

TRUE

False

Question 52

What are the three modes of sending IPv4 packets? A. Unicast

B. Broadcast

C. Multicast

D. Anycast

Options:

Question 53

Which of the following is incorrect about BGP routing? (Single Choice)

Options:

Non-aggregated routes take precedence over aggregated routes.

in PrefVal, Local_ PIf the references are equal, if the BGP preference of the locally generated route, IBGP route, and EBGP route is the same, the locally generated route takes precedence.

See below entry in BGP routing table: * 172.16.1.11/32 0.0.0.0 100 ? Indicates that the route is available and non-optimal.

for next- Routes that are not reachable by the hop are invalid routes and do not participate in optimization.

Question 54

As shown in the following topology diagram, all interfaces of the router in the figure enable the ISIS protocol. The following statements are correct (multiple choices))

Options:

if the Ethernet0/0/0 interface of R1 is down, then R2 will become the master device

if the Ethernet0/0/1 interface of R1 is down, then R2 will become the master device

if the GE0/0/0 interface of R3 is down, then R2 will become the master device

if the Ethernet0/0/0 interface of R3 is down, then R2 will become the master device

Question 55

The OSPF protocol runs on a company's network. An engineer performs packet diversion operations on the network in order to gain a deeper understanding of the OSPF mechanism. Which of the following descriptions about OSPF packets is correct?

Options:

Add interface to OSPSend Hello message immediately after area F

LSUpdate packets are only sent when adjacency is established

After receiving the LsUpdate message, the router must send LsAck to confirm

LS Update packets synchronize the link state database by sending detailed LSA information

Question 56

As shown, in IPv44 and IPv6 environment, ISISThe SEL field in the NET address always takes the value 00. ( confirmed)

Options:

True

false

Question 57

The correct description about the prefix list is: (multiple choice)

Options:

Prefix list is used to filter IPPrefix, which can match both prefix number and prefix length

Prefix list is used to filter IPPrefix, cannot match prefix number and prefix length at the same time

Prefix lists cannot be used for packet filtering

Prefix lists can be used for packet filtering

Question 58

Which of the following tools cannot beRoute if in policy-match clause directly quoted?

Options:

Regular expression

IP-prefix

AS-path-filter

Community-filt

Question 59

Which of the following descriptions about the OSPF protocol are correct?

Options:

AS-External-LSA does not belong to any area

The cost value of the second type of external route is only the AS external cost value, ignoring the AS internal cost value

AS-External-LSA describes the path to the AS external route, and the flooding range is AS external

AS-External-LSA Describes the path from the router to the ASBR

Question 60

As shown in the figure, all routers run ospf, which of the following statements is correct? (single choice)

Options:

R2 willR1 GeneratedRouter LSA forward toR3

R2 in the area 1 and area 0 will generateRouter LSA

R2 willR3 GeneratedRouter LSA forward toR1

R2 only in area 0 generated inRouter LSA

Question 61

In a multicast network, what causes the multicast traffic to fail to be forwarded normally? (Multiple Choice)

Options:

Router has no RPF route

existPIM is not enabled on the RPF interface

PI that the upstream router will receiveM Join message discarded

Multi-router egress network, this router is not a DR

Question 62

IPv6 introduces Solicited-Node address, the following description about this address is correct: ( confirmed)

Options:

This is a specific address used in ARPv6 to resolve MAC addresses.

Solicited on router interface -Node addresses are automatically generated, and there can be more than one.

If Solicited is not configured-Node address, the router will automatically generate one on each interface.

IPv46 Introducing Solicited-Node address is to support IPv6 multicast.

Question 63

Which of the following descriptions about MUX VLANs in Huawei switches is correct? (Single Choice)

Options:

MUX VLAN is divided into Principal VL AN and Subordinate VLAN is divided into Separate VLAN and lsolate VLAN

each Separate VLAN can bind multiple Principals VLAN

in the same VLAUnder N, MUX VLAN can and Super Mixed use of VLANs

Principal Port can and MUX All ports within the VLAN communicate

Question 64

Which of the following descriptions is wrong about the OSPFv3 protocol?

Options:

In the case of sharing a router, each OSPFv3 process runs independently

Multiple instances can run in the same OSPFv3 process under the same interface

Can support running multiple instances on a single link

OSP the Fv3 packet header will contain the Interface ID field

Question 65

View the detailed information of all VPN instances on a network device, and the results are as follows. Which of the following statements is false?

Options:

VP configured on the local endThe total number of instances in N with IPv6 address family enabled is 1.

VPN-Instance vpna will not receiveVPN routing with RT of 2:1.

GigabitEtheThe rmet1/0/0 interface is bound to the VPN-Instance vpna.

The device will be the VPN-Instance Each route of the vpna is assigned a label.

Question 66

Two VTEPs in a VXLAN can determine a VXLAN tunnel, and the VXLAN tunnel between the VTEPs will be shared by all VNIs between the two NVEs.

Options:

True

false

Question 67

A medium-sized campus network manages the network through the SNMP protocol. The campus has high network security. Which version of SMMP is recommended for management?

Options:

SNMPV1

SNMPV2C

SNMPV3

All versions can be implemented

Question 68

Compared with IGMPv1, what improvements have the IGMPv2 protocol made?? (multiple choice)

Options:

Added maximum response time field

Added out-of-group packets

Added specific group query message

Added specific source group query packets

Question 69

Which of the following attacks areDoS ( Denial of service) attack?

Options:

single packet attack

Source IP address spoofing attack

man-in-the-middle attack

flood attack

Question 70

Which of the following information about BGP4+ is correct?

Options:

BGP4 can use the dampening command to suppress flapping of IBGP routes.

Modify BThe RouterID of the CP will cause the BGP connection between routers to be re-established.

BNext in CP4+ The Hop attribute is represented by an IPv6 address, which can be the link-local address of the next hop.

BGP4+ does not support automatic route aggregation.

Question 71

The BGP protocol is an inter-domain routing protocol. The following description of the protocol is correct:

Options:

Supports rich routing strategies

The BGP protocol adopts a reliable transmission protocol

It does not support neighbor authentication

Support automatic discovery of neighbors

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Huawei H12-261_V3.0 HCIE-Routing & Switching (Written) V3.0 Exam Practice Test

HCIE-Routing & Switching (Written) V3.0 Questions and Answers

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