H12-261_V3.0 Practice Exam Questions with Answers HCIE-Routing & Switching (Written) V3.0 Certification

All running OSPF Protocol routers are listening 224.0.0.5

All routers are listening 224.0.0.2

All running PIM Protocol routers are listening 224.0.0.100

All hosts and routers in the network segment are listening 224.0.0.1

R5 can learn the loopback route of R2 normally

R3 cannot learn the loopback route of R2

R1 can normally learn the loopback route of R2

R3 can learn the loopback route of R2 normally

TRUE

FALSE

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

True

false

IGMP Snooping does not consume the CPU of the switch

IGMP Snooping solves the problem of multicast multicast broadcast at Layer 3

IGMP Snooping runs at the link layer and is a multicast constraint mechanism on a Layer 2 Ethernet switch to manage and control multicast groups.

IGMP Snooping establishes a MAC multicast address table by monitoring the IGMP messages sent by the host.

Layer 2 gateway:It is used to solve the problem of tenants accessing the VXLAN virtual network, and can also be used for subnet communication of the same VXLAN virtual network.

Layer 3 gateway:Used for cross-subnet communication of VXLAN virtual networks and access to external networks.

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

The Layer 2 gateway is bound to the VPN instance.

Five types of LSA by ASBR advertises and floods the OSPF network in non-Stub/NSSA areas

A router in the same area as the ASBR can calculate the external route through the intra-area LSA and Category 5 1SA

The FA address is included in the five types of LSAs. The FA address is 0.0.0.0, which is only reserved and has no practical effect.

existFive types of LSAs can be filtered by configuring corresponding filtering policies on ABR or ASBR.

116

118

112

114

The prefix is learned through other IBGP neighbors, or the prefix is learned from EBGP neighbors, or the prefix is learned through route importarrived

Prefixes that exist in the routing table

The prefix is learned through other BGP neighbors, or the prefix is locally through network or route introduction learned

The prefix is learned via EBGP neighbors, or the prefix is locally via network or route introduction learned

The prefix is learned from EBGP neighbors, or the prefix is learned from RR

Subsequent intranet users will not be able to access the Internet

Automatically switch from NAT to PAT to access the Internet

Synchronize the message to other MT conversion devices for NAT conversion D. Squeeze out the previous user and force NAT conversion to access the Internet

interface GigabitEthernet0/0/1 undo eth-trunk 1

interface GigabitEthernet0/0/1 undo shutdownwn

Member interfaces can be added to a link aggregation group enabled by the following command: interface GigabitEthermet0/0/1 shutdownwn

interface GigabitEthernet0/0/1 trunkport GigabitEthernet0/0/1 interface GigabitEthermet0/0/1 undo shutdownwn

Agile Controller-Campus

Agile Controller-WAN

Agile Controller-DCN

AS PATH

NED

Oorigin

Local -Preference

After the network converges, R1 is DR

After the network converges, a new broadcast link is set to R4, and the priority of R4 is 150. When the network converges again, R4 is DR

After the network converges, R1 is powered off and restarted, and when the network converges again, R3 is the DR

After the network converges, the engineer modifies the priority of R1 to 100, the priority of R2 to 10, and the default value of R3. When the network is closed again, R1 is DR, R2 is BDR

The registration packet encapsulates multicast service data.

RPA registration stop message is sent upon receipt of a registration message.

The registration message is used to construct the RPT tree between the source DR and RP.

The registration message is a multicast message.

VBDIF interface

Layer 2 sub-interface

VLANIF interface

NVE interface

SSM The address of the multicast group is 232.0.0.0~232.255.255.255

IGMP SSM Mapping Does not handle IGMPv3 report message. In order to ensure that any version of IGMP runs on the same network segment hosts can get SSM service, you need to run IGMPv on the interface of the multicast router connected to the network segment where the member host is located3

If IGMP is not enabled SSM Mapping Features, IGMPv1 and IGMPv2 Neither supports the deployment of SSM The multicast

option of the mode is missing. The ABC option is correct. Anyway, ABC is not selected.

True

false

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

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

Outgoing interface

MAC address

IP address

VLAN ID

True

false

Gigabitethernet1/0/1 and Gigabitethernet1/0/2 can join the same aggregation group without changing the current configuration

After link aggregation is configured on both SWA and SWB, if the switches SWA and SWB enable MSTP, then the interface status of Gigabitethernet1/0/1 and Gigabitethernet1/0/2 in MSTP is the same

Because of different link types, Gigabitethernet1/0/1 and Gigabitethernet1/0/2 cannot join the same aggregation group

Only by changing the configuration of Gigabitethernet1/0/2 to be consistent with Gigabitethernet1/0/1, the two can join the same aggregation group

ISIS elects by comparing prioritiesDIS, if the priority is the same, compare the MAC address

In a broadcast multiple access network,DIS sends Hello three times as often PDU

DIS ensures database synchronization by periodically sending CSNP messages

The DIS supports the preemption function. After the new DIS is successfully preempted, it does not need to flood any LSP packets.

TRUE

FALSE

The MAC address spoofing attack mainly uses the MAC address learning mechanism of the switch

The MAC address spoofing attack will cause the switch to learn the wrong mapping between the Mac address and the IP address

An attacker can implement a MAC address spoofing attack by sending forged source Mac address data frames to the switch

A MAC address spoofing attack will cause the data to be sent by the switch to the correct destination to be sent to the attacker

Added maximum response time field

Added out-of-group packets

Added specific group query message

Added specific source group query packets

RSTP adds types of port states

RSTP has less overhead

RSTP does not converge based on timers

RSTP has smaller timers

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

5Class LSA

7Class LSA

1Class LSA

4Class LSA

Class 2 LSA

Open Notepad, enter undo debugging all, copy the command line, paste it into the Monitor interface

Exit the current Monitor interface, re-SSH into the device to open a new Monitor interface

Open Notepad, enter undo terminal debugging, copy the command line, and paste it into the Monitor interface

Open Notepad, enter undo terminal monitor, copy the line command, and paste it into the Monitor interface

TRUE

FALSE

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

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

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

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

Both routers are Level-1type.

Both routers remain the default type.

One of the two routers can be a Level-1-2 type, and the other can be a Leve1-1 type.

ISIS with two routersProcess IDs must be the same.

True

false

This router is the DR

This router has established an adjacency relationshipC. This router supports external route import

The router of this router ID for 10.0.12.1

Huawei] isis 1

[Huawei-isis-1] is-level level-1

[Huavvei-isis-1] network-entity 47.000.0000.0000.0002.00 [Huawei-isis-1] ipv6 enable topology standard

[Huawei-isis-1] ipv6 import-route ospfv3 1 level-1 [Huawei-isis-1] quit

[Huawei] ospfv3 1

[Huawei-ospfv3-1] router-id 2.2.2.2

Huawei] isis 1

[Huawei-isis-1] is-level level-1

[Huavvei-isis-1] network-entity 47.000.0000.0000.0002.00 [Huawei-isis-1] ipv6 enable topology standard

[Huawei-isis-1] ipv6 import-route ospfv3 1 [Huawei-isis-1] quit

[Huawei] ospfv3 1

[Huawei-ospfv3-1] router-id 2.2.2.2

[Huawei] isis 1

[Huavvei-isis-1] network-entity 47.0001.000.0000.0002.00 [Huawei-isis-1] ipv6 enable topology standard

[Huawei-isis-1] ipv6 import-route ospfv3 1 level-1 [Huawei-isis-1] quit

[Huawei] ospfv3 1

[Huawei-ospfv3-1] router-id 2.2.2.2

[Huawei] isis 1

[Huavvi-isis-1] network-entity 47.0001.0000 000002.00 [Huawei-isis-1] import-route ospfv3 1

[Huawei-isis-1] quit [Huawei] ospfv3 1

[Huawei-ospfv3-1] routerid 2.2.2.2

[Huawei] isis 1

[Huawei-isis-1] is-level level-1

[Huavvei-isis-1] network-entity 47.0001 0000000.0002.00

[Huawei-isis-1] import-route ospfv3 1 level-1 [Huawei-isis-1] quit

[Huawei] ospfv3 1

[Huawei-ospfv3-1] router-id 2.2.2.2

True

false

GE0/0/2 on STB is an alternative port

GE0/0/1 on SWA is a backup port

GE0/0/1 on SWB is an alternative port

SWB will become the root bridge

AS_ _PATH (321 12 2374)

AS_ _PATH (123621 7432374)

AS_ PATH (125328 74 twenty three)

AS_ PATH (32 1274 twenty three)

The next-hop router of router HW has no path to reach the destination address

Ping was successful, but congestion occurred on the path to the destination

ICMP packets can reach the destination address, but the destination device fails to reply

router HWThere is no valid route to the destination address

There is a firewall in the remote destination network, and I have not been releasedCMP traffic

The transmission node device will replace the existing stack top label (outermost label) with the label allocated by the next hop device.

When IP Packet enters MPLS domain, check the destination IP Tunne corresponding to the addressl ID Is the value 0x0 if Tunnel ID value is 0x0, then enter MPLS forwarding process.

when IP Packet enters MPLS domain, MPLS The boundary device is in the packet layer 2 header and IP Insert a new label between the headers

sign.

By default, PHP is supported Egress The label value assigned by the node to the penultimate hop node is 3.

Sub-VLAN contains physical interface, and can establish three-layer VLANIF interface

Super-VLAN contains only physical interfaces and cannot establish a three-layer LANIF interface

Sub-VLAN is used to isolate broadcast domains

A Super-VLAN can contain one or more Sub-VLANs

Double barrels with two speeds

Single barrels with single speed

Three barrels with single speed

Double barrels with single speed

True

false

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

ARP broadcast suppression

VRRP over VXL AN

Multi-active gateway

VXL AN Qos

The circuit-level of the s4/0/0 interface is Leve1-1

The Cost value of the s4/0/0 interface is 20

The s4/0/0 interface sends an IIH cycle of 30S

The s4/0/0 interface supports IPv6

host IP address

Host MAC address

Layer 3 VNI

Layer 2 VNI

IP-Prefix

community-filterr

as-path- -filter

ACL

True

false

Interface authentication can be used to authenticate Level-1 and Level-2 hello packets

After interface authentication is configured, the IIH sent by the router must carry the authentication TL.V

After configuring the area authentication, the IIH, S sent by the routerNP, LSP must be connected with certified TLV

If the two routers are configured for area authentication and interface authentication respectively, and the passwords are the same, the two routers can establish a neighbor relationship.

Both VRRPv2 and VRRPv3 support authentication

VRRPv3 does not support the authentication function, while VRRPv2 supports the authentication function.

VRRPv2 is only applicable to IPv4 networks, and VRRPv3 is only applicable to IPv6 networks.

Masterr The owner of the IP address VThe RP priority is 255, so the configurable priority range is 0-254

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

A carried by routeSPATH attribute to filter routes received from BGP neighbors. For example the command peer xxxx as-path-fliter import

Route apply clause in policy

A carried by routeSPATH attribute to filter routes sent to BGP neighbors. For example the command peer xxxx as-path-ilter export

if-match clause in Route-policy

True

false

Cluster-List is an optional non-transition attribute used to prevent loops within a cluster.

Routes learned from clients, advertised to all non-clients and clients of this RR.

A backbone network is divided into multiple reflection clusters, eachRR configures her RRs as non-clients, and establishes IBGP full connections between RRs.

The trigger-ID attribute is generated by a route reflector (RR) and is used to prevent loops between clusters.

30

50

80

40

Dual Stack

6 to 4

ISATAP

NAT64

2

3

0

1

Type7

Type5

Type4

Type3

If not configuredRD-filter. However, if this RD-filter is used for filtering, the matching result is deny.

If configuredRD-filter, but the RD of the route does not match any of the RDs defined in the rule, the default matching result is permit.

Multiple rules are matched according to the configuration order.

RD-filter Between configured rules is always "or"Relationship.

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

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

The egress PE uses the inner layer label when judging which egress CE the message should be sent to.

MPLS BGP VPN uses two layers of labels, the public network label (also called the outer label) and the private network label (also called the inner label).

The private network label is used by NP-BGP It is carried and distributed when the route is passed, and the public network label is set by LDP Agreement distribution.