Newly Updated H12-261-ENU HCIE-Routing&Switching Questions

That’s great, we newly updated H12-261-ENU HCIE-Routing&Switching questions on August 30, 2019, which will be the best online preparation materials for passing Huawei H12-261-ENU exam. Come to get H12-261-ENU exam questions to prepare for H12-261-ENU HCIE-Routing&Switching exam.

We also share free H12-261-ENU exam questions online for checking. Here there are 25 free H12-261-ENU exam questions. Answer one question can get 4 scores. The total score is 100. You can read all these free questions online and test them by yourselves. Then you will find the full version of Huawei H12-261-ENU questions is helpful. More questions, you can contact us freely: [email protected].

Begin to Test:

1. When ISIS area authentication is configured, which ISIS packet can carry the authentication information?

Level-1 SNP and LSP of ISIS

Level-1 Hello message of ISIS

Level-2 SNP and LSP of ISIS

Level-2 Hello packet of ISIS

Question 1 of 25

2. The Type 5 LSA in OSPF is used to pass external routes. Which of the following statement about the five Type 5 LSA is wrong?

The router in the same area as the ASBR can calculate the external route through the intra-area LSA and the Type 5 LSA.

Configure the corresponding policies on the ABR and ASBR to filter the Type 5 LSA.

The Type 5 LSA is advertised by the ASBR and flooded in the OSPF network in the non-Stub/NSSA area.

The FA address is included in the Type 5 LSA, and the FA address is 0.0.0.0, but has no practical effect as a reservation.

Question 2 of 25

3. After the BGP connection is successful, then down, what are the reasons for the impossible?

Open packet negotiation failed.

The mandatory attribute in the routing update message is lost.

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

Received incorrect BGP packets.

Question 3 of 25

4. What is the correct description of the BGP reflector? (Multiple Choice)

The route reflector can advertise the routers learned from IBGP neighbors to all clients and non-clients.

IBGP neighbor relationships need to be fully interconnected without a route reflector. The introduction of route reflectors can reduce the requirements for full interconnection.

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

The route reflector can advertise the routes learned from one client to other clients and non-clients.

Question 4 of 25

5. Regarding the BGP confederation, which of the following description is incorrect?

The confederation divides an AS into several sub-AS confederation. External As still considers the confederation to be an AS.

The sub-AS number of the confederation is advertised to BGP peers outside the confederation by default.

The sub-autonomous system within the confederation can use a private AS number. A Huawei NE/AR router can be configured with up to 32 sub-AS in a single confederation.

The confederation can easily detect the routing loop within the AS because EBGP is running between the sub-As.

Question 5 of 25

6. There is an AS-path-filter, ip as-path-filter 1 permit ^100(_100)*(_400)*, which AS-PATH attribute cannot be matched by the As-path-filter?

100 400

100 400 400 400

100 200 900

100

Question 6 of 25

7. Which of the following statement about deploying ISIS protocol in IPv6 environment is correct?

In broadcast networks, the DIS priorities of IPv4 and IPv6 can be set separately.

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

In the same broadcast network, if each router supports both IPv4 and IPv6, the DIS of IPv4 and IPv6 must be the same device.

Configure ISIS silent on the ISIS interface, then this interface will not send ISIS packets, but will receive ISIS packets.

Question 7 of 25

8. After the BGP route is imported to other protocols, the next hop in the BGP routing table is the same as the next hop of the routing protocol imported.

True

False

Question 8 of 25

9. If the value of the Option field in the OSPFv3 Hello packet sent by GigabitEthernet 0/0/0 interface of Router A is 0x000013, which of the following description is correct? (Multiple Choice)

GigabitEthernet0/0/0 interface of Router A belongs to the NSSA area.

GigabitEthernet0/0/0 interface of Router A will participate in IPv6 route calculation.

Router A is an OSPFv3 device with forwarding capability.

Router A supports AS-External-LSA flooding.

Question 9 of 25

10. Regarding BGP route filtering, what is wrong with the following description? (Multiple Choice)

For a locally advertised route, configure a routing policy. The policy takes effect before the route is added to the BGP routing table.

The filtering relationship between the nodes of the Route-Policy is "or", that is, if it is filtered by a node, it can pass route-policy.

When receiving a route of a BGP peer, perform a routing policy to filter unwanted BGP routes. These routes are not added to the local BGP routing table.

In the same node of Route-Policy, the relationship of multiple if-match clauses for different attributes is "OR".

Question 10 of 25

11. To view the routing table of router R1, execute the command "display ip routing-table" on the route R1. Router R1 runs OSPF. Which of the following is true about the OSPF information in the routing table?

In the routing table, the routing entry identified by the "O_ASE" identifier indicates that the entry was learned through a Type 1 LSA or a Type 2 LSA.

In the routing table, the routing entry identified by the "O_ASE" identifier indicates that the entry can only be learned through routing.

In the routing table, the routing entry identified by the "O_IA" identifier is the intraregional routing.

In the routing table, the routing entry identified by the "OSPF" identifier are learned through the Type 7 LSA imported from other processes to OSPF.

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

Question 11 of 25

12. Regarding the Stub area and the NSSA area of the OSPF protocol, which of the following statement is incorrect?

Type 5 LSA is not allowed in the Stub area, and Type 5 LSA is allowed in the NSSA area.

Both the Stub area and the NSSA area can inject Type 3 LSAs.

Both the Stub area and the NSSA area are not allowed to inject Type 4 LSA.

Type7 LSA is not allowed in the Stub area, and Type 7 LSA is allowed in the NSSA area.

Question 12 of 25

13. Regarding the sliding window of TCP, which of the following descriptions are wrong? (Multiple Choice)

After the retransmission timer expires, the sender has not received the acknowledgement and will retransmit the unconfirmed data.

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

TCP sliding window allows multiple packets to be sent before receiving an acknowledgment

The sliding window size can only be increased or left unchanged

The sender announces the initial window size

Question 13 of 25

14. What is the correct description about Filter-policy?

Filtering the generation of type 5 LSA and type 7 LSA on the ASBR in OSPF using Filter-Policy

The prefix list can filter routes as well as filter packets.

Filter-Policy can filter the received or advertised link state information, and can modify the attributes of the route entry.

When filtering routes using the prefix list, the entry ip ip-prefix 1 deny 0.0.0.0 0 less-equal 32 means that only the default route is matched.

Question 14 of 25

15. The OSPFv3 protocol is a separately developed protocol. It differs from OSPFv2 in that OSPFv3 is based on links rather than network segments. Which of the following statement is incorrect?

The two routers connected to the link can establish neighbor relationships even if their IPv6 address prefixes are different.

The two routers connected to the link can establish neighbor relationships even if no unicast IPv6 address is configured.

The routing information obtained by the OSPFv3 router from the neighbor uses the link-local address of the neighbor as the next hop of the forwarded packet.

All OSPFv3 interfaces use the Link-local address as the destination address of the packet except the virtual link.

Question 15 of 25

16. ISIS will elect DIS in the broadcast multi-access network. Which of the following statement about DIS is correct? (Multiple Choice)

ISIS elects the DIS by comparing the priorities, and compares the MAC addresses if the priorities are the same.

DIS guarantees database synchronization by periodically sending CSNP messages

In a broadcast multi-access network, the DIS sends Hello PDUs three times as often.

DIS supports the preemption function. After the new DIS preemption is successful, it does not need to flood any LSPs.

Question 16 of 25

17. Which of the following about the RD attribute filter of BGP is correct? (Multiple Choice)

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

The relationship between the rules configured by RD-filter is "or".

If RD-filter is not configured, but this RD-filter is used for filtering, the matching result is deny.

Match multiple rules in the order of configuration

Question 17 of 25

18. Which of the following description about the process of sending and receiving data frames in the Access mode of the switch interface is correct?

Directly discard when receiving a tagged data frame in Access mode.

Only receive unlabeled data frames in Access mode

When the data frame enters the switch interface, the switch learns the destination MAC address in the data frame.

In the Access mode, the VLAN tag of the data frame will be stripped off when sent.

Question 18 of 25

19. Which of the following options may affect the establishment of IBGP neighbors? (Multiple Choice)

Authentication is unsuccessful

The BGP protocol version is inconsistent

IBGP – Multi-hop not configured

IGP routing is unreachable

Question 19 of 25

20. In RSTP, which port can provide the backup path that has reached to the root node of the spanning tree? What state is the port?

Alternate port and Learning state

Alternate port and Forwarding state

Root port and Listening state

Designate port and Listening state

Alternate port and Discarding state

Question 20 of 25

21. When you troubleshoot a LAN that has Huawei devices deployed, you find that there are many unicast frames with unknown source MAC addresses in the LAN. What is the greatest harm that many unknown source MAC address unicast frames will cause to the switch?

Consume available bandwidth

Increase the power consumption of the power supply

Occupy the memory of cached frames

Consume available MAC address entries in the system

Occupy TCAM entries

Question 21 of 25

22. Which of the following description of the MUX VLAN in the Huawei switch is correct?

In the same VLAN, the MUX VLAN can be mixed with the Super VLAN to use.

The MUX VLAN is divided into a Principal VLAN and a Subordinate VLAN. The Subordinate VLAN is further divided into a Separate VLAN and an Isolate VLAN.

Each Separate VLAN can be bound to multiple Principal VLANs

Principal Port can communicate with all interfaces in the MUX VLAN

Question 22 of 25

23. Which of the following description about the CHAP authentication function in the PPP protocol is correct? (Multiple Choice)

If the authenticator does not configure a username, the password cannot be configured on the authenticated interface.

Calculate a Hash value by the MD5 algorithm using the authentication sequence ID, random number and key

Three-message interactive authentication is required, and the username is transmitted only on the network without transmitting the password.

The user name must be configured under the authenticated interface of CHAP authentication.

Question 23 of 25

24. An existing switch runs RSTP. If the network topology changes, what happens to the Layer 2 forwarding entries learned automatically by the switch?

All entries are deleted

Only entries related to the port that received the TC message will be deleted.

Other entries are deleted except the entries related to the edge port.

If the aging time is set to 15 seconds, the entries that exceed the aging time will be deleted.

Other entries are deleted except the entries related to the edge port and the entries related to the port that receives the TC message.

Question 24 of 25

25. Cross-device link aggregation enables data stream transmission and mutual backup of stack member switches. However, because of the limited bandwidth of stack cables between stack devices, which of the following methods can improve forwarding efficiency?

Connect stack devices through stack cards

Enable stack multi-master check function

Configure stack system MAC address switching

Enable traffic local priority forwarding

Question 25 of 25

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