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

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

The router will use it to build a HW1 LDP LSP LFIB and create a new path in the Chinese

The router will abandon the text HW1 lose the newspaper

The router will forward the report using the modal HW1 tag.

The router will strip the HW1, FIB IP tags and find the destination address.

Configure route summarization on R2 and summarize routes as 10.0.0.0/16.

Configure route summarization on R3 and summarize routes as 10.0.0.0/16.

On R1, configure a filter policy, use the ACL applied to the filter-policy to match 10.0.3.3/32, and apply direction.

IBGP ALoopback BGP establishes a stable neighbor relationship for the interface address.

PE-CE OSPF IS-iS EBGP exchange routing can be static routing, multiple instances, multiple examples,

The TTL field in the tag has a function to prevent the path.

BGP Soo VPN MPLS Soo MP-BGP is used to prevent routes routed from one site from going back to the site through the backbone network. Self-generated Expansion group

Route summarization can be configured and takes effect on all types of routers.

Route summarization takes effect only on Level-1 routers

Route summarization takes effect only on Level-2 routers.

Route summarization takes effect only on Level-1-2 routers.

PIM-SM C-BSR There may be multiple BSR domains, but only one election.

BSR C-RP C-RP collects information from received packets.

BSR Bootstrap PIM-SM BSR C-RP floods the message to advertise information and information to all routers in the domain.

A C-BSR C-RP C-RP packet can also be received to collect information.

Route aggregation can be configured and valid on all routers.

Route aggregation can only be configured on the router to take effect level--1

Route aggregation can only be configured on the router to take effect level--2

Route aggregation can only be configured on the router to take effect level--1-2

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.

100

3100

300 4200

1234 1400

Configure routing R3 above, 10.0.0.0/16 summary.

Configure route R2 above, 10.0.0.0/16 summary.

Configure the above R2 filter-policy, ACL 10.0.3.3/32, expot over match when used in the same direction

Configure the above R1 filter-policy, ACL 10.0.3.3/32, import over match, use the same direction

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

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

The external routing meter can be calculated by the ASBR LSA LSA in the same area as the router in the same area.

The strategies for configuring the phase can be five ABR ASBR LSA should filter the class

Category 5 LSA ASBR Stub/NSSA OSPF is advertised and flooded in the network in the non-region

In the five types of LSA FA FA 0.0.0.0, the address is included, but the reservation is not effective.

OSPF LSDP IP will put all routing information in the routing table.

The route that is not reachable in the next hop in BGP IP will also be placed in the routing table.

From the different routing entries from the learning to the same destination network segment, the BGP OSPF preference of the comparison is better than the protocol value.

To routing table IP

BGP cost protocol is better than the value of the routing entry. The best route to the same destination network segment.

This command enables 1S-IS Hello PDUs to carry authentication information.

1S-1S SNP and LSP can be flooded normally only when the domain authentication mode and password of all routers in the same routing domain are MD5 and hello.

IS-IS authentication cannot be applied to IPv6 environments.

Routing domain authentication enables Level-1 and Level-2 SNPs and LSPs to carry authentication information.

Importing IBGP routes into the OSPF process may cause routing loops.

By default, the metric of external routes imported into the OSPF process \s 1 and the type of imported external routes is Type 2.

BGP can generate routes in either Import or Network mode. The Network mode is more precise than the Import mode.

After IS-IS Level-2 routes are imported to an ISTS Level-1 area, routing loops occur if no route import policy is manually configured.

Local and remote discriminators must be configured for this function.

After this function is enabled, the destination and source IP addresses of BFD packets are the same.

This function is applicable when one device supports BFD and the other device does not.

The default destination IP address of a BFD packet is 224.0.0.184.

SSM is applicable to one-to-many applications.

Only the RPT is used for SSM.

Only the 5PT is used for SSM.

SSM is recommended when multiple sources are available on the network and the multicast route is simple.

No RP is required.

2013:0; 130F::9C0:876A: BOB

2013::130F::9CO:876A:130B

2013:0:130F:0:0:O9C0:876A:130B

213::13F::9C:876A:13B

2013:0:130F:0:0:9C0:876A:130B

The IPv6 over VXLAN network indicates that the VXLAN overlay network is an IPv6 network.

The IPv6 Over VXLAN network does not generate ND entries.

Tunnels between Layer 2 and Layer 3 VXLAN gateways are deployed on an IPv4 network.

The IPv6 over VXLAN network enables tenants to have sufficient IP address resources.

Hello time interval

6 seconds

MaxAge interval

BPDUs on the interface will not be aged out.

Forward delay

GigabitEthernet0/0/0 of router A belongs to an NSSA.

GigabitEthemet0/G/0 of router A participates in IPv6 route calculation.

Router A is an OSPFv3 device enabled with the forwarding capability.

Router A supports flooding of AS-external-LSAs.

By default, sub-AS numbers of a confederation are advertised to BGP peers outside the confederation.

A BGP confederation divides an AS into several sub-ASs. ASs outside a confederation still consider the confederation as an AS.

Confederations can easily detect routing loops inside an AS because EBGP is run between sub-ASs.

Sub-A5s within a BGP confederation can use private AS numbers. For Huawei NE and AR routers, a maximum of 32 sub-ASs can be configured in a BGP confederation.

TRUE

FALSE

Apply clause in a router-policy

Filtering routers received from BGP peers based on the AS_Path attribute. For example, the peer X.X.X.X as-path-filter import command.

If-match clause in a route-policy

Filtering routes sent to BGP peers based on the AS_path attributes. For example, the peer X.X.X.X as-Path filter export command.

Type3

Type5

Type4

Type2

Type1

True

False

Yes

Wrong

It is a multicast address range used by routing protocols

Any legal multicast data flow and multicast application can use this address segment

Link-local multicast traffic mode up of network control messages meant to stay in the local subnet

It is a locally scoped multicast address and should only be used on local segments

It is an SSM multicast address range which is used on the entire network.

Forward delay

Hello time

Root cost

Hold time

Max Age

Interchange of the exchange

The exchange between the BPDUs is inconsistent.

Interchange of the exchange The Region Name configuration is inconsistent

Interchange of the Instance VLAN mapping configuration is inconsistent

Reporting Forwarding Layer Labels Up to two are required in the script.

ASBR VPNV4, VPNv4 does not save routes, and does not advertise between routes.

VPN PE PE, the VPN route is exchanged between the ingress and the egress.

Cross-domain mode is not suitable when using multiple VPN-Option-c ASs.

Ruter-ID BGP4 Router-ID is the same as .

BGP4+ peer Link-Local specified when required

The next hop of the BGP4+ Link-Local route does not use an address.

BGP4+ BGP4 When the reflector is configured, the role of the reflector and the client needs to be the same as the configuration of the user.

BGP4+ does not support route reflectors.

The integrity of the digital name guarantee number is signed.

The number contains the public information certificate key.

When the received body is within the validity period of the certificate, but the device itself is not valid, the device time error certificate is lost.

Even if the two entities are not in the same PRI CA, CA, the real system can complete the authentication as long as both parties can identify each other.

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.

LSA5

LSA2

LSA1

LSA3

Non-aggregated routing precedes aggregation routing.

In the case of equal and equal If the locally generated route, route, route Pref-Val local_preference, IBGP EBGP BGP preference

Consistent locally generated valid routes first, then excellent

See the following entry in the routing table BGP :* 172.16.1.11/32 0.0.0.0 10 0 ? Represents the route available.

For nexthop, the unreachable route is invalid and does not participate in the preference.

Will not age on the interface, RSTP BPDU.

After more than 6 seconds

After the Super MaxAge

After the Super Hold time

After the super

When the configuration of each port is consistent, port, Ethernet1/0/7 Unselected

When the configuration of each port is consistent, port, Ethernet1/0/6 Unselected

In the case of consistent port configuration, random port aggregation in each port, SWA 7 Unselected selected as group port

In the case of consistent port configuration, port, Ethernet1/0/1 Unselected

Bgp4+ dampening IBGP can use the match to suppress the polling of the routing line.

The modified BGP router id BGP guide connection will be re-established.

BCP4+ Next Hop Pv6, the attribute in the address is represented by the address, which can be the next-hop road-local address chain.

BGP4+ does not support route self-aggregation.

Each router establishes a topology structure for the entire flooding domain.

Each router directly routes from the routing update and adds it to the routing table.

The router in the flooding domain may repeatedly receive the same road information chain.

The routers in the entire flooding domain have the same road data.

The router will send all the existing road information to all other neighbors to send the wrong state to the neighbor, and the data synchronization certificate.

The Advertising Route is set to

netmask 0 of the ASBR router-id.

link state id is set to the destination network segment address is set to

Use and can be unique. A link state id advertising Router LSA identifier

The route reflector can advertise all IBGP client non-client neighbors from the learned route.

In the absence of a route reflector, the relationship needs to be fully inter-IBGP neighbors, and the introduction of route reflectors can reduce the requirement for full inter-connection.

The route reflector can advertise all non-client clients from the learned routes.

The route reflector can advertise other client client non-client from a learned route.

TC=CIR/BC

CIR=TC/BC

CIR=BE/TC

TC=BC/CIR

cir 10000 pir 12000

cir 10000 cbs 10000 pbs 12000

cir 8000 pir 12000

cir 10000 cbs 12000 pbs 12000

In the broadcast network, the first can be divided into IPv4 IPv6 DIS priority settings.

By default, the priority of the broadcast network interface is Level-1 Level-2 DIS 1 and

In the same broadcast network, if each router is supported, IPv4 IPv6 IPv4 IPv6 DIS and , and must be the same device

ISIS ISIS silent ISIS ISIS interface configuration, then this interface will not send packets, but will receive packets

Correct

Error

Correct

Error

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.

LDP MP-BGP 16-1023, etc. The null of the signaling is dynamic protocol label

MPLS 20 tag length is bit, used for message forwarding

Adopt mode mode Pipe TTL IP MPLS IP TTL MPLS When the message is transmitted on the network, the value of the message is only at the in and out points.

Subtraction 1

MPLS S 1 supports multiple nested layer labels, and the innermost layer label is value

Clause in the route-policy apply

Clause in the route-policy if-match

According to the route with AS_PATH, BGP peer x.x.x.x as-path-filter export attribute sends the route to the neighbor. For example command

According to the route with the AS_PATH, BGP peer x.x.x.x as-path-filter import attribute to the route received by the filtering neighbor. For example command

LDP, vp–Option-c 2 when only the label is used on the public network. For the cross-domain solution, the third-layer forwarding layer label is required.

For the inter-domain vPN-OptionB, the ASBR MP-eBGP mode needs to establish a neighbor relationship.

For the inter-domain vPn -OptionA, the routes of the ASBR IPv4 mode are ordinary inter-route routes.

For inter-domain vPN-OptionB, ASBR-E ( ), VPN, two methods, use multiple interfaces, including sub-interfaces, interconnect each interface, one each.

ASBR-PE CE

The sender advertises the size of the initial window.

If the sender does not receive an acknowledgment message after the retransmission timer times out, it retransmits the unacknowledged data.

The sliding window size can only be increased or remains unchanged.

A TCP sliding window allows the sender to send multiple data packets before receiving an acknowledgment message.

The sender does not need to transmit packets with a complete window size.

The device assigns a label to each route of the VPN instance vpna.

GigabitEthernet1/0/0 is bound to the VPN instance vpna.

The total number of locally configured VPN instances for which IPv6 address families are enabled is 1.

The VPN instance vpna does not receive VPN routes with RT being 2:1.

When configuring priorities, you must ensure that the same router server as the master router in three VRRP backup groups

To implement load balancing, default network gateways of hosts on a LAN must be configured as IP addresses of different virtual routers

Multiple VRRP backup groups can be created on an interface of a router. The router can serve as the master router in on VRRP backup group and the backup router in other VRRP backup groups.

VRRP local balancing requires that at least two virtual routers transmit services at the same time.

A VNI has 24 bits and is used to identify a VXLAN segment.

The destination UDP port number is 4789.

The outer destination IP address is the IP address of the remote VTEP in a VXLAN tunnel.

The source UDP port number is 4789.

Single-packet attacks

Flood attacks

Man-in-the middle attacks

Source IP address spoofing attacks

After CSNPs and DD packets are received by the peer router, the peer router needs to send an acknowledgement message; otherwise, the packets need to be retransmitted.

Once the neighbor relationship is established, CSNPs and DD packets are not sent.

The master/slave relationship in OSPF DD packet exchange is not bound to DR/BDR; and CSNPs are generated only by the DIS.

After CSNPs and DD packets are received by the peer router, the peer router does not need to send an acknowledgment message.

The block of administratively scoped multicast addresses

Source Specific multicast addresses

SDP/SAP addresses

Any class A, Class B, or Class C host address

GLOP addresses

When an OSPFv3 router obtains routing information from a neighbor, it uses the link-local address of the neighbor as the next hop for packet forwarding.

Two OSPF routers on the same physical link can still establish a neighbor relationship even if no unicast IPv6 address is configured.

Two OSPF routers on the same physical link can still establish a neighbor relationship even if their IPv6 addresses are on different networks.

Except for virtual links, all OSPFv3 interfaces use a link-local address as the destination address of OSPFv3 message.

PIM-SM has RPTs and SPTs but PIM-DM has only RPTs

BSRs/RPs exist only on a PIM-SM network, not on a PIM-DM network

PIM-SM is applicable to a network with few receivers; PIM-DM is applicable to a network with a larger number of receivers

Whether in PIM-SM or PIM-DM mode, receiver hosts must join multicast groups through IGMP

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.

The device discards IP packets that enter the MPLS domain.

An LSR does not remove any label.

A Label Switched Path (LSP) is determined and established through various protocols during the packet forwarding process.

Both LERs and LSRs distribute labels.

In inter-AS VPN Option B mode, an MP-EBGP peer relationship needs to be established between two ASBRs.

In inter-AS VPN Option B mode, two ASBR-PEs are interconnected through multiple interfaces (including sub-interfaces), each interface is associated with one VPN, and each ASBR-PE considers the remote device as a CE.

In inter-AS VPN Option A mode, the routes advertised between two ASBRs are common IPv4 routes.

In inter-AS VPN Option C solution 2, if only LDP is used to advertise public network labels, three labels need to be used during packet forwarding.

There is no way to make BGP work across a firewall without special configuration, so there is no simple test that will show you if BGP will work, other than trying to start the peering session.

Attempt to Telnet from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If Telnet works, BGP will work, since telnet and BGP both use TCP to transport data

There is no way to make BGP work across a firewall

Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them, BGP should work, since BGP uses IP to transport

packets.

A route can have only one value for the Community attribute.

The number of the neighboring AS is displayed to the right of the AS_Path list of a BGP routing entry.

The Local_Pref attribute is exchanged only between EBGP peers and is not advertised to other ASs.

When advertising a route learned from an EBGP peer to an IBGP peer, the BGP speaker does not change the Next_Hop attribute of the route.

The MP_UNREACH_NLRI attribute of Update packets does not contain path information

MP_REACH_NLRI and MP_UNREACH_NLRI are optional transitive attributes

The complete MP_REACH_NLRI attribute structure contains the address family, next hop, and prefix information

MP-BGP can be used to allocate labels