Huawei H12-261 Dumps

AS_Path (32 1274 23)

AS_Path (125 328 74 23)

AS_Path (123 621 743 2374)

AS_Path (321 12 2374)

True

False

The time taken to detect BFD packets on R1 is 660 ms.

The time taken to detect BFD packets on R2 is 800 ms.

The time taken to detect BFD packets on R2 is 600 ms.

The time taken to detect BFD packets on R1 is 1280 ms.

The physical layer of the peer

The peer’s presentation layer

The peer’s session layer

The peer’s application layer

The data link layer of the peer

::1/128

FE80::/10

FC00::/7

2000::/3

The Link State ID of an Inter-Area-Prefix-LSA contains prefix information

Router-LSAs and Network-LSAs do not contain routing information

Inter-Area-Prefix-LSAs contain link-local information

When the Referenced Link State Type of an Intra-Area-Prefix-LSA is 2, the Referenced Link State ID contains the interface ID of the DR

OSPF

MPLS LDP

BGP

Static routing

Its transmission is acknowledgment

Its transmission is secure

Its transmission is not secure

Its transmission is not reliable

Its transmission is not acknowledged

Its transmission is reliable

TRUE

FALSE

TRUE

FALSE

TRUE

FALSE

30 Mbit/s

90 Mbit/s

25 Mbit/s

15 Mbit/s

Switch will send tagged frames belong to a specified vlan

When received a tagged frame from an access port. Switch may forward it vlan

Switch will learn the MAC-address only on access port

Switch only receives untagged frames from access port and drop all tagged frames

R2 can receive LSPs from R1, but cannot add the routing information in the LSPs to the routing table

R2 can learn all routes advertised by R1

R2 can learn only the route 10.1.1.0/24

R2 can learn the routes 10.1.2.0/24 and 10.1.3.0/24

TRUE

FALSE

An IPsec VPN connection can be established only when the bidirectional SA exists between IPsec peers

An SA is identified by three parameters: security parameter index (SPI), destination IP address, and security protocol ID (AH or ESP)

You can run the display ipsec sa command to view the encryption algorithm used and traffic of interest between IPsec peers

IPsec can only use symmetric encryption algorithms to encrypt and decrypt data

Negotiation of parameters in Open packets fails.

Mandatory attributes in Update packets are missing.

Error BGP packets are received.

After the BGP connection is set up, no Keepalive packet is received within the negotiated holdtime.

Run the ssm-policy advanced-acl-number command in the system view to configure the SSM group address range

Run the ssm-policy basic-acl-number command in the system view to configure the SSM group address range

Run the ssm-policy advanced-acl-number command in the PIM view to configure the SSM group address range

Run the ssm-policy basic-acl-number command in the PIM view to configure the SSM group address range

[mask-length, less-equal-value]

[less-equal-value, 32]

Unlimited

[0, less-equal-value]

OSPF does not pass the interface to establish any connection.

OSPF does not add routes learned from the interface to the local routing table.

OSPF will receive routing updates from neighbors.

The OSPF interface establishes the available connections.

Register mechanism

BSR/RP mechanism

Assert mechanism

Join/Prune mechanism

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 LDP FRR LSP LSP can also be generated from the mapping of the non-lowest hops as the privilege label, and the primary device is configured as the primary device. The table forwarding entry B. LDP IGP IGP LDP IGP is associated with the association. , guaranteed to be consistent with the path

Hand-configured dynamic LDP FRR 32 LDP LSP policy is the default route to the backup device.

LDP GR (Graceful Restart) MPLS uses the feature that the plane and the control plane are separated, and is forwarded when the device protocol is replaced by the restart or the primary or the reverse.

No interruption.

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.

ACL

Regular-expression

AS-path-filter

IP-prefix

Correct

Error

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

When using the main channel redundancy IPSEC URPF URPF backup link, use the function under the physical interface to build the loose mode.

When using multi-channel redundancy IPSEC tunnel URPF URPF chain backup, enable the function under the interface, you can use the grid mode

When the primary channel redundancy IPSEC URPF URPF backup link is used, the function can be enabled on the physical interface.

When using multi-channel redundancy IPSEC URPF URPF chain backup, enable the function on the physical interface, you can use the grid mode

True

False

The routing domain is mainly used for authentication to enable Level-1 Level-2 SNP LSPs and the context of the document to be transmitted with authentication.

All routers in the same routing domain have the domain MD5 hello ISIS SNP LSP authentication, the password is , and the normal expansion

The command is mainly used to send information messages to the ISIS Hello document.

ISIS IPv6 cannot be used in the authentication environment

Open report, defeat, loss

Routing update The mandatory attribute in the text is lost.

After the BGP holdtime keepalive connection is established, the message is not received within the quotient of the quotient.

Received error BGP message

Response

Trap

Inform

Get

Get Bulk

Reachable

Stale

Probe

Incomplete

If configured, the Suppress policy Route-production clause can also be used to pick the suppressed route. policy if-match is fine,

The clear route will still be advertised. Other Route-policy BGP will be given to neighbors.

If only the matching routes are configured to participate in the aggregation Origin-policy, Route-policy is fine.

If you have configured the attribute Attribute-policy that can change the aggregated route,

If the route's As-set, AS_ATH AS is configured, the summary contains path information of all specific routes to prevent routing loops.

Environmental protection

Root protection

TC-BPDU protection

BPDU protection

In the area, the NSSA OSPF hello option N 1, E 0 neighbor message, the location in the field

NSSA LSA, LSA FA area will generate seven categories to advertise external routes. The role of the address in the seven classes is to prevent the path from being looped.

In the NSSA LSA area, a silent acknowledgment will be generated to access the external network.

NSSA OSPF he1lo , option- N 0, E 1 in the area

The RP RPT is constructed with the recipient.

The multicast source and the RP RPT are constructed by the tree.

RP SPT and the recipient's construction is the tree

The multicast source and the RP SPT are constructed by the tree.

TCP, , After the LDP connection is successfully established, the initialization message sent by the master sends the relevant parameters of the negotiation establishment.

The transmission is made by the party with the larger address, and TCP initiates the connection.

LDP Hello TCP, 224.0.0.2 Neighbor Discovery Message Usage Message Destination Address is Broadcast Address Group

When both parties receive the Keepalive, LDP message, they will succeed.

True

False

When the router receives a LSA age 360s, the LSA says that this is not available.

The serial number and parameters can be judged. The old and new routers are better than the age LSA and sequence.

When the router receives two of the same serial numbers and the same LSA, , , the check is smaller and better

If the serial number reaches the bundle LSA 0x7FFF age 3600s lsa value, the current router is advertised as

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

In the mode, the client completes the control and data FTP Passive, the TCP user's initialization

In the mode, the server is connected to the command FTP Active, "PORT is used to tell the client which port it wants to send data to.

FTP TCP always uses a remote control information and data information

FTP TCP 20, ICP 21 Always use the far port to establish a data session. Use the port to establish control.

Session E.FTP TCP 21, TCP 20 Always use the far port to establish a data session Use the port to establish a control session

NAT64

IPv6 over IPv4

Dual-Stack

ISATAP

When configuring dynamic, the RP and BSR RP need to be configured as the backup.

The RP and BSR RP need to be configured with advertised information.

When configuring static BP, PIM RP needs to specify information on all routers.

When the configuration is dynamic, the RP and BSR do not need to be configured.

Savage mode can support traversal while main mode does not support traversing NAT, NAT

Two routers have established IPSec VPN, 5 ( ) in the main mode, and the data from the first message is often encrypted.

Two routers have established IPSec VPN through the aggressive mode, and then the tunnels are established between the two least interacting devices.

The two routers can pass IPSec VPN OSPF, the tunnel establishes the neighbor relationship and the intranet route changes.

ARP broadcast suppression

VRRP over VXLAN

Multi-live gateway

VXLAN Qos

The features of ISIS GR are silently enabled.

ISIS GR has a total of four timers.

ISIS GR CSNP informs events and relationships by reporting neighbors

ISis GR TLV has a new meaning to support the features.

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.

By default, the same LSR FEC is targeted, and the received mapping can only be from the next hop label, not from the next hop.

When the topology of the network causes the next hop to change to the neighbor, use the free-hold label to directly use the original non-next hop LSR.

Rapid reconstruction label LSP

Label release in the DoD FEC LSR mode, in the specific pair, no need to obtain the message from the upstream, the distribution and distribution of the label, please enter the label

The establishment of the LSP FEC LSP LSR is to tie the actual and the demarcation label and bind the notification to the upstream process.

Correct

Error

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.

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

In the routing table, the routing table with the indicator indicates that the table is "O_ASE". 1 LSA 2 LSA is marked with the identifier that the item is classified or learned.

In the routing table, the routing table with the indicator can only be used to refer to the “O_ASE” tag that is learned by the route.

In the routing table, the route marked with the indicator indicates that the internal route of the area is “O_IA”.

In the routing table, the routing table with the indicator is introduced from other programs to the "OSPF" OSPF 7 LSA standard.

In the routing table, all types of LSAs have unique destination addresses.

Provide a built-in policer to limit the maximum available time of the queue.

The parameters should be as small as possible. It means that the bandwidth is always reserved, LLQ, even if the bandwidth parameter is used, the interface is available.

It indicates the reference to calculate the sudden size of the built-in tactical counter bucket.

The option parameter is a OK, LLQ because it starts with the other columns.

Type-7

Type-5

Type-4

Type-3

Chain bandwidth road is not enough

The IP address is not on the same network segment.

Chain layer protocol road inconsistency

Subnet mask does not match code

bgp mportNetwork, Network generates routing support. Two ways are more precise.

By default, the default metric of the external route is imported. The OSPF 1, Type2 value is the imported external route type.

After the route is imported to the C. isis level-2 network level-1, , if the route is imported, the ring will form a route.

Introducing a route in the route may cause a route OSPF IBGP ring

The system ID of R3 is 0003.0000.000

3R is a Level-1-2 router.

R3 is the DlS of a Level-1 link.

R3 Is the DI5 of a level 2 link.

TRUE

FALSE

Routers in the same area as the ASBR can calculate external routes through intra-area LSAs and Type 5 LSAs.

Filtering policies can be configured on ABRs or ASBRs to filter Type 5 LSAs.

Type 5 LSAs are advertised by ASBRs and flooded on OSPF networks except stub areas and NSSAs.

A Type 5 LSA contains the FA address, which is 0.0.0.0.The FA address is reserved only and does not take effect.

TRUE

FALSE

Allows the remote PE to determine which VPNv4 routes should not be imported to a specific VRF instance.

Allows the remote CE to determine which VPNv4 routes to be imported to a specific VRF instance.

Allows the remote PE to determine which VPNv4 routes to be imported to a specific VPN routing and forwarding (VRF) instance.

Allows the remote CE to determine which VPNv4 routes should not be imported to a specific VRF instance.

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.

Protocol

Time to Live

Flags

Identification

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-

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

When an IP packet enters an MPLS domain, the device checks whether the tunnel ID corresponding to the destination IP address of the packet is 0x0. If so, the MPLS forwarding process starts.

By default, the egress node supporting PHP allocates the label with the value of 3 to the penultimate hop.

A transit node replaces a label on the top of the label stack in an MPLS packet with the label assigned by the next hop.

When an IP packet enters an MPLS domain, the MPLS edge device inserts a new label between the Layer 2 header and the IP header of the packet.

TRUE

FALSE

When traffic exceeds the minimum threshold, WRED starts to discard all inbound traffic (tail drop).

Traffic with low bandwidth is more likely to be discarded than traffic with high bandwidth.

WRED selectively discards multiple TCP flows to avoid global synchronization.

WRED can be used to set different drop thresholds and packet loss ratio for data packets with different priorities.

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.

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.

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.

The LSAck packet contains the LSA header information, which is used for acknowledging the receipt of an LSA.

The Hello packet must contain interface ID of sending interface.

The Option field of Hello and DD packets is extended to 24 bits.

The LSR packet contains the complete LSA header information, which is used for request updating LSAs.

TRUE

FALSE