H12-261 HCIE-Routing & Switching (Written) Questions and Answers

R2 R1 export MED 150 specifies that the body pair is set in the direction attribute

R1 R3 import MED 150 specifies the body to be set in the direction attribute

R2 R1 export 150 specifies the body to set the priority in the direction

R1 R2 import 150 specifies that the body is set to the local direction in the direction.

Trap, Get, and Set messages

Only Trap messages

Get, Set, and GetNext messages

Get, Set, and GetBulk messages

Get, Set, GetNext, and GetBulk messages

No BSR needs to be configured when a dynamic RP is configured.

When a static RP is configured, you need to configure a BSR that advertises RP information.

The BSR needs to be configured as the RP backup when a dynamic RP is configured.

RP information needs to be specified on all PIM routers when a static RP is configured-

Multiple bridges share a spanning tree instance.

Each VLAN owns a spanning tree instance.

Multiple VLANs share a spanning tree instance.

All VLANs share a spanning tree instance.

LS Update LSA report The information sent by the detailed text is synchronized to synchronize the data link library.

After receiving the LS Update LS Ack report, the router must send the request to confirm

Send the OSPF Hello packet immediately after the interface joins the zone.

LS Update report only when neighboring messages are sent in the connection

TRUE

FALSE

True

False

[Huawei] isis 1

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

[Huavvei-isis-1] network-entity 47.0001.0000.0000.0002.00

[Huawei-isis-1] ipv6 enable topology standard

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

[Huawei-isis-1] quit

[Huawei] ospfv3 1

[Huaweiospfv3-1] router-id 2.2.2.2

[Huawei] isis 1

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

[Huavvei-isis-1] network-entity 47.0001.0000.0000.0002.00

[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 47.0001.0000.0000.0002.00

[Huawei-isis-1] ipv6 enable topology standard

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

[Huawei-isis-1] quit

[Huawei] ospfv3 1

[Huaweiospfv3-1] router-id 2.2.2.2

[Huawei] isis 1

[Huavvei-isis-1] network-entity 47.0001.0000.0000.0002.00

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

[Huawei-isis-1] quit

[Huawei] ospfv3 1

[Huawei-ospfv3-1] router-id 2.2.2.2

Route policy

IP-prefix

Community-filter

AS-Path-filter

Data Road Department Chain Head

Upper data layer

Network Department

Path record

net tail layer

R2 R1 can learn all the routes of the study

R2 10.1.1.0/24 can learn this route.

R2 10.1.2.0/24 10.1.3.0/24 can learn and two routes.

R2 R1 LSP can be received but cannot be added to the routing table.

A host connected to the switch sends a ping packet.

The DHCP client receives an acknowledgment message from the server

A new host with an IP address is connected to the network.

The master and backup devices are elected in VRRP.

LSP fragment extension enables an IS-IS router to generate multiple LSP fragments to carry more 15-15 information.

An IS-IS router can generate a maximum of 1024 LSP fragments.

LSP fragment extension is implemented by adding virtual systems, with a maximum of 1000 virtual systems supported.

LSP fragment extension is also valid for Hello PDUs.

A BGP route matches community-filter 2 only when it carries the Community attribute values of 100:1 and 200:1.

A BGP route matches community-filter 1 only when it carries the Community attribute value of 100:1 or 200:1, or both.

A BGP route matches community-filter 1 only when it carries the Community attribute values of 100:1 and 200:1.

A BGP route matches community-filter 2 only when it carries the Community attribute value of 100:1 or 200:1, or both.

Option A

Option B

Option C

Option D

E Option E

For traffic shaping, you can adjust the usage of the buffer for the traffic that exceeds the CIR.

For traffic policing, you can adjust the usage of the buffer for the traffic that exceeds the CIR.

For traffic shaping, the router buffers excess packets until the bandwidth is available again.

Traffic policing uses the token bucket algorithm and traffic shaping uses the SPD algorithm.

Traffic shaping is applied in the inbound direction and traffic policing is applied in the outbound direction.

The filtering of Type 3 LSAs needs to be configured on ABRs in OSPF.

In a NSSA, when external routes are imported to the OSPF router and LSAs are advertised to its neighbors, LSA filtering can be performed on the ASBR or ABR.

All LSAs, except Grace LSAs, can be filtered based on interfaces in the inbound and outbound directions.

When routes are calculated based on the LSDB, the filter-policy import command can be executed to filter routes. This filtering mode affects only the addition of routes in the routing table, and has no impact on the OSPF LSDB.

IS-IS Level-1 SNPs and LSPs

IS-IS Level-1 Hello PDUs

IS-IS Level-2 Hello PDUs

IS-IS Level-2 SNPs and LSPs

The AS_Path attribute values of equal-cost routes for load balancing must be different.

When BGP load balancing is implemented, the local device can change the next-hop address of routes to its own address when advertising the routes to IBGP peer groups only if the peer next-hop-local command is configured.

Load balancing can be implemented among BGP routes with different origins but having the same destination network segment.

Load balancing can be implemented among IBGP routes and EBGP routes having the same destination on the public network.

Type1

Type2

Type3

Type4

Type5

IPSG P can match the incoming and outgoing check packets of the incoming interface and the outgoing interface.

On the router, Huawei, Vlanif IPSG can configure the function on it.

If an interface is configured as DHCP Snooping Trust HCP ACK DHCP NAKHCP Offerf , , and reports other untrusted ports are not working properly.

Receive some texts

ip source check user-bind check-item VLAN IP, the command is used to configure the interface check item based on the interface or the static state command and static table.

All items are in force.

Routing entries 10.0.3.3/32 and 10..0.0./16 exist in the IP routing table of R1.

Routing entries 10.0.2.2/32 and 10.0.3.3/32 exist in the IP routing table of R1.

Because route summarization is configured on R2, only the routing entry 10.0.0./16 exist in the IP routing table of R1.

Routing entries 10.0.2.2/32 and 10.0.0.0/16 exist in te IP routing table of R1.

Forward delay

Hello time

Root cost

Hold time

Max Age

IGMPv3 deletes suppression of IGMPv3 Membership Report messages

IGMPv3 deletes the function of matching all sources through wildcard belong to specific multicast group

IGMPv3 enables a host to join a specified multicast group that excludes a specified multicast source

IGMPv3 adds Request-to-Send and Clear-to-Send messages between source and local IGMP queries

IGMPv3 enables a host to join a specified multicast group that includes a specified multicast source

RTC

RTB

RTD

RTA

An MCE device creates a routing table for each VPN and binds each VPN instance to it’s interfaces

The MCE has been bound to a VPN. Therefore, no VPN needs to be bound to the PE connected to the MCE

Based on the interface for receiving routing information, the MCE determines the origin of the routing information and adds the routing information to the routing table of the corresponding VPN

The MCE can connect to multiple VPNs. The MCE solution isolates services of different VPNs while reducing the cost of network devices

The label switching router (LSR) with the larger transport address initiates a TCP connection.

After two devices receive a Keepalive message from each other, the LDP session is successfully established.

LDP Neighbor Discovery Hello messages are encapsulated using TCP with the multicast destination address of 224.0.0.2.

After the TCP connection is successfully established, the active party sends an Initialization message to negotiate with the passive party about parameters used for establishing an LDP session.

Huawei devices support port mirroring on the control traffic sent to the CPU

Huawei devices support flow-based port mirroring. The mirrored traffic can be copied onto multiple observing ports

Traffic in the RSPAN is transmitted to observing ports in multicast mode

When the observing port becomes congested, mirrored packets cannot be discarded because these packets have higher priority than service traffic

FALSE

TRUE

A new TLV is defined to support IS-IS GR.

IS-IS GR is enabled by default.

IS-IS GR uses four timers.

IS-IS GR uses CSNPs for event notification and neighbor relationship maintenance.

WRR is a congestion management technology

WRR prevents congestion on the network

WRR ensures important traffic being forwarded first

WRR ensures that all queues being serviced

WRR cannot be used on gigabit-ethernet interfaces

Static routes

MPLS LDP

OSPF

BGP

The Link-LSA contains both the link-local address and all IPv6 prefixes of the interface

The Link-LSA contains both the link-local address of the interface and all IPv6 prefixes of the same area on the router

The Option field exists in an LSA header rather than the data area of a Link-LSA

If the PrefixOptions field of a prefix in the Link-LSA is 0x00, the prefix is not involved in the IPv6 unicast calculation

SNMPv2c has privacy and uses usernames for authentication

SNMPv3 has privacy and uses community for authentication

SNMPv3 has privacy and uses usernames for authentication

SNMPv1 has no privacy and uses community for authentication

SNMPv2c has privacy and uses usernames for authentication

True

False

R2 DIS CSNP acts as , and will be sent periodically. B. R2 DIS Hello 3 As , the time of the normal router is doubled.

R2 DIS PSNP as a request for not receiving other routes.

R1 R3 PSNP and periodic periodic transmissions are requested to be consistent with the data.

Synchronization is turned off

BGP Down neighbor relationship

Router is not enabled R1 BGP Multi-hop

Routing is not the best

Run the ebgp-load-balance command on the EBGP peers.

No method is needed. BGP automatically implements load balancing among different Ass through available links.

Establish an EBGP peer relationship through loopback interfaces, and configure the loopback interfaces as update sources. In each AS, import two equal-cost routes to the loopback interface of each EBGP peer to the IGP process. In addition, run the ebgp-max-hop and next-hop-local commands.

Configure an EBGP peer relationship through loopback interfaces, and configure the loopback interfaces as update sources. In each AS, enable two equal-cost routes to the loopback interface on each EBGP peer in the IGP process. In addition, run the next-hop-local command.

True

False

VRRPv2 VRRP v3 and both support authentication

VRRPv3 VRRPv2 does not support function authentication, but supports function authentication.

VRRPv2 IPv4 VRRPv3 IPv6 only for networks, for network only

Mater IP VRRP 255 0-254 The address of the owner has excellent

If the packet source address IP 10.0.1.2, DSCP is then forwarded, the field remains unchanged

If the packet source address IP 10.0.1.2, DSCP CS3 is then forwarded, the field can be marked as

If the packet source address P 10.0.1.2, then the forwarding cannot be

If the packet source address IP 10.0.1.1, DSCP cS3 is then forwarded, the field can be marked as

Because R2 R1 IP 10.0.0.0/16 does route aggregation, only the routing entries exist in the routing table.

R1 IP 10.0.2.2/32 The routing entries with and in the routing table of 10.0.3.3/32

R1 IP 10.0.3.3/32 Routing entries in the routing table of 10.0.0.0/16 with the same and

R1 IP 10.0.2.2/32 The routing entry with and in the routing table of 10.0.0.0/16

If the interface is then R3 GE0/0/0 down, R2 master is the device

If the interface is , then it will become R3 Ethernet 0/0/0 down R2 master as device

If the interface is , then it will become R1 Ethernet 0/0/0 down R2 master as device

If the interface is , then it will become R1 Ethernet 0/0/1 down R2 master as the devicec

AS_PATH (32 1274 23)

AS_PATH (123 621 743 2374)

AS_PATH (321 12 2374)

AS_PATH (125 328 74 23)

The former is the EBGP RR neighbors, or the previous ones

Previously passed other BGF network neighbors, or previously localized or routed to learn

Previously passed other IBGP EBGP neighbors, or formerly learned from the neighboring habits, or the previous introduction of the routing

Presences existing in routing shows

Before being acquainted with EBGP network, or before being localized or routed.

C-RP's priority

The mask of the C-RP service that matches the address of the added group.

Address of the C-RP IP interface

Number of the C-RP interface

R1 Level-1 Level-2 LSDB is the same as when

R1 Ping R21 1oopbapk0 can pass the interface address

R1 R2 1oopback0 10.0.2.2/32 There is a route to arrive

R1.R2 can not establish a relationship between neighbors

True

False

rule permit ip source 10.1.2.0 0.0.0.255 destination 10.1.1.0 0.0.0.255

rule permit ip source 10.1.1.0 0.0.0.255 destination 10.1.2.0 0.0.0.255

rule permit ip source 10.1.1.0 0.0.0.255 destination 192.168.1.2 0

rule permit ip source 192.168.1.1 0 destination 10.1.2.0 0.0.0.255

rule permit ip source 192.168.1.1 0 destination 192.168.1.2 0

R2 BFD 800ms text report detection time is

R2 BFD 600ms text report detection time is

R1 BD 660ms text report detection time is

R1 BFD 1280ms text report detection time is

External destination IP VXLAN VTEP IP address is the address of the tunnel end

Source port number is UDP 4789

Purpose The port number is UDP 4789

VNI 24, VLAN has bits for distinguishing segments

Route-policy

ACL

IP-prefix

AS-path-filter

True

False

Non-standard format MAC address

Multiple access in CSMA/CD

MAC address in canonical format

802.5 encapsulated frames

802.3 encapsulated frames

True

False

Reporting In the forwarded mode, the ASBR VPN LSP exchanges on the two private networks to be paired.

Two neighbor relationships between ASBR MP-EBGP need to be established.

The cross-domain scheme is not limited by the number of interconnections. VPN-option-B ASBR is linked.

Two ASBR VPNv4 inter-exchange routes are exchanged with external label.

The stub cannot exist in the ASBR area.

The virtual path cannot traverse the chain stub area

stub type7 LSA area is not allowed to be injected

The backbone area cannot be configured as a stub area.

Type 3

Type 4

Type 1

Type 2

Type 5

Interface can be authenticated to achieve Level-1 Level-2 hello and document authentication.

After the interface is configured for authentication, the router sends out the IIH TLV with certain authentication.

After the configuration area is authenticated, the router sends out the IIH SNP LSP, and must carry the authentication.

Two routers are divided into configuration areas and interfaces. Authentication and authentication are the same. Then two routers can establish a neighbor relationship.

Access mode directly discards the data frame with the tag

Only receive data in Access mode with label frame

Data The destination modification frame MAC address in the opportunistic data when the input interface frame is changed.

In the Access VLAN mode, the send frame will be stripped of the data.

True

False

R1 R2 POS IPCP 24 and the interconnection port, learned the parallel subnet routing of the straight interface

R1 R2 POS IPCP 32 and the interconnection port, learned the serial host route of the straight interface

R1 R2 POS LCP MAC ARP MAC and the interconnection port, by learning the familiar address of the end interface, no need to ask for the address

R1 R2 POS ARP MAC and the data of the interconnection port. The text does not need to be encapsulated in the Ethernet header.

R1 sends a PSNP to R2

R1 sends an LSP to R2

R1 sends a Hello PDU to R2

R1 sends a CSNP to R2

30M

15M

90M

25M

Presentation layer

Application layer

Transport layer

Session layer

Data link layer

7 LSA class

1 LSA 2 LSA Classes and Classes

1 LSA 2 LSA 5 LSA Classes, Classes and Classes

3 LSA 4 LSA Classes and Classes

1 LSA 2 LSA 3 LSA Classes, Classes and Classes

Host Address Notification MAC

Host Announcement ARP

BUM News Forwarding

Host Route Advertisement IP

Alternate Learning port and status

Alternate Forwarding Port and Status

Root port and shape Listening state

Designate Listening port and status

Alternate Discarding port and status

Router is R4 DR

Router Yes or R2 DR BDR

Router is not R2 DR

Router is not R3 DR, BDR

Router and router do not form R2 R3 full adjacency

Configure routing policies on R2. Default route filtering.

R2 system-ID R3 conflict

R3 R4 and the area of ​​the regulation error

R2 system-ID R1 conflict

Added specific text query

Added a separate report

Increased the maximum response field.

Added specific source query report