Huawei H31-161 Online Practice Questions and Exam Preparation

Huawei H31-161 Online Questions & Answers

• Question 141:

  Which of the following combinations of LDP working modes supports LDP FRR?

  A. Downstream independent label distribution + ordered label control + free label retentionB.Downstream on-demand label distribution + independent label control + free label retention
  B. Downstream independent label distribution + independent label control + conservative label retention
  C. Downstream on-demand label distribution + ordered label control + conservative label retention
  A. Downstream independent label distribution + ordered label control + free label retentionB.Downstream on-demand label distribution + independent label control + free label retention

• Question 142:

  The edge routers of the MPLS network, partial interface configurations on the IP access side are as follows: [Quidway]diffserv domain default [Quidway-dsdomain-default]ip-dscp-inbound 10 phb ef green [Quidway-dsdomain-default]mpls-exp-outbound ef green map 5 [Quidway-dsdomain-default]mpls-exp-inbound 4 phb ef green [Quidway-dsdomain-default]ip-dscp-outbound ef green map 18 [Quidway-dsdomain-default]quit[Quidway] interface GigabitEthernet 2/0/0 [Quidway-GigabitEthernet2/0/0] trust upstream default [Quidway-GigabitEthernet2/0/0] port-queue ef pq shaping 20 outbound Which of the following statements about the preceding configurations are true?

  A. The trust upstream default command maps the DSCP priority to the corresponding EXP value when an IP packet enters the MPLS network and maps the EXP value to the corresponding DSCP priority when an IP packet leaves the MPLS network.
  B. If an IP packet with a DSCP value of 10 is sent to the MPLS network (non-PHP node) from GigabitEthernet 2/0/0, the corresponding EXP value is 5. If an MPLS packet with an EXP value of 4 is sent from GigabitEthernet 2/0/0, the DSCP value of the corresponding IP packet remains unchanged.
  C. The port-queue ef pq shaping 20 outbound command configures PQ scheduling and a maximum of 20 Mbit/s bandwidth for the EF queue when GigabitEthernet 2/0/0 sends IP packets.
  D. When GigabitEthernet 2/0/0 sends IP packets, the bandwidth of these sent IP packets can reach 1 Gbit/s if the EXP value is 4.
  A. The trust upstream default command maps the DSCP priority to the corresponding EXP value when an IP packet enters the MPLS network and maps the EXP value to the corresponding DSCP priority when an IP packet leaves the MPLS network.
  C. The port-queue ef pq shaping 20 outbound command configures PQ scheduling and a maximum of 20 Mbit/s bandwidth for the EF queue when GigabitEthernet 2/0/0 sends IP packets.

• Question 143:

  

  As shown in the figure, DUT stands for the device under test and RTA is used to support the test. Which combination of the following configurations is mandatory for fast convergence?

  1.

  BFD

  2.

  Minimum LSP refreshing interval

  3.

  Most sensitive SPF timer

  4.

  Minimum Hello packet sending interval

  5.

  Minimum LSP sending interval

  6.

  Longest computing time of SPF slices

  7.

  Minimum LSP retransmission interval

  8.

  Minimum LSP generation time

  9.

  Flash-flood

  10.

  GR function

  11.

  Setting cost-style to wide

  A. 3, 5, 6
  B. 3, 5, 6, 8, 9C.1, 3, 5, 6, 9
  C. 1, 2, 3, 5, 7, 8, 9
  B. 3, 5, 6, 8, 9C.1, 3, 5, 6, 9

• Question 144:

  As shown in the figure, MPLS, MPLS TE, and MPLS RSVP-TE are configured on RTA, RTB, RTC, and RTD. Tunnel1/0/0 and Tunnel2/0/0 are set up based on the explicit path RTA-RTB-RTC. Tunnel1/0/0 has a hot-standby path (RTA-RTDRTC) and an FRR path:

  RTA-RTD-RTC, whereas Tunnel2/0/0 has an ordinary path (RTA-RTD-RTC) and an FRR path.

  Which of the following statements are true?

  

  A. When the link between RTA and RTB is faulty, the state of Tunnel1/0/0 is hotstanby inuse.
  B. When the link between RTA and RTB is faulty, the state of Tunnel2/0/0 is ordinary inuse.
  C. When the link between RTA and RTB is faulty, the state of Tunnel2/0/0 is FRR inuse.
  D. When the link between RTB and RTC is faulty, the state of Tunnel2/0/0 is ordinary inuse.
  A. When the link between RTA and RTB is faulty, the state of Tunnel1/0/0 is hotstanby inuse.
  C. When the link between RTA and RTB is faulty, the state of Tunnel2/0/0 is FRR inuse.

• Question 145:

  If a (*, ) entry exists in the RP, Which of the following statements about the source registration are true in PIM_SM?

  A. The first hop DR connecting to the source encapsulate received multicast into PIM registration information and unicast the encapsulated information to the PR.
  B. The RP sends an (S, G) join message hop by hop to the first hop DR connected to the multicast source to add the multicast source to the SPT.
  C. The first-hop RD connecting to the source sends received multicast data to the RP ho[p by hop.
  D. The RP encapsulates registration information and uses RTP to send data packet to be sent to the multicast group to the outbound interface.
  E. The RP unicast a registration stop message to the first router connection to the multicast source.
  E. The RP unicast a registration stop message to the first router connection to the multicast source.

• Question 146:

  Which statement about primary VPN tunnel binding is false?

  A. Only the data destined for the specific peer device is transmitted through the n=bound primary VPN tunnel Data to other devices is transmitted using the default tunnel policy.
  B. Primary tunnel ensures that data can be transmitted from a VPN t a specific peer device permanently through a dedicate TE tunnel.
  C. Primary VPN tunnel binding means to bind a tunnel to a specific VPN. The bound tunnel is exclusive to the VPN.
  D. The bound primary tunnel can be selected sequentially.
  D. The bound primary tunnel can be selected sequentially.

• Question 147:

  Refer to the exhibit.

  

  As shown in the figure, inter-AS VPN Option A is used. CE 1 and CE 2 belong to the same VPN.AS 100 and AS 200 run IGP and LDP, respectively. ASBRs communicate with each other through EBGP. The loopback interface address of CE 1 is 10.1.1.1/24. Suppose CE 2 can ping CE 1. Which router allocates an inner label when PE 2 forwards packets from CE 2 to CE1?

  A. PE 1
  B. P1
  C. ASBR 1
  D. ASBR 2
  E. P2
  D. ASBR 2

• Question 148:

  Which of the following statements about the L2VPN are true?

  A. If the length of a L2VPN packet that arrives at a P node exceeds the maximum transmission unit (MTU) of relevant interfaces of the P node, the packet will be fragmented and then forwarded.
  B. When a traditional L2VPN (ATM and FR) is upgraded to an MPLS L2VPN, the network topology does not need to be adjusted.
  C. When providing the MPLS L2VPN service for enterprise users, the carrier must filter user route advertisements. Otherwise, flapping of user routes may lead to flapping of network routes.
  D. On a L2VPN, routing information of users does not need to be maintained or managed.
  B. When a traditional L2VPN (ATM and FR) is upgraded to an MPLS L2VPN, the network topology does not need to be adjusted.
  D. On a L2VPN, routing information of users does not need to be maintained or managed.

• Question 149:

  As shown in the figure. CE 1 and CE 3 belong to VPN-A, and CE 2 CE 2 4 belong to VPN- B VPN-target VPN-A is 111:1 and that of VPN-B is 222:2 users on different VPNs are not allowed to access each other. Configuration principles are as follows:

  On the backbone network VPNs are not connected to a CE, VPN instance need to be configured on the PE, and an interface on the PE for connecting to the CE must be bounded to a VPN instance. After binding an interface to a VPN instance, you must configure the IP address of the interface Between PEs, IS-IS is configured for PE interworking. MPLS basic capabilities and MPLS LDP are configured for MPLS LSP establishment, and MP-IBGP is configured for VPN route exchange.

  

  How to enable CE 1 to learn routes from AS 64430?

  A. Import IS-IS 200 routes in IS-IS process 100
  B. Import IS-IS 100 routes in IS-IS process 100
  C. Import BGP routes in IS-IS process 100
  D. Import BGP routes in IS-IS process 200
  C. Import BGP routes in IS-IS process 100

• Question 150:

  Refer to the exhibit.

  

  As shown in the topology, RTB directly connects to RTC through the POS interface. To implement the TE function, RTB and RTC are configured as follows: Configuration of RTB: mpls lsr-id 2.2.2.2 mpls mpls te

  mpls rsvp-te mpls te cspf #

  isis 1 is-level level-2 cost-style compatible

  network-entity 00.2222.2222.2222.00

  traffic-eng level-1-2

  log-peer-change

  #

  interface Pos4/1/0

  clock master

  link-protocol ppp

  ip address 22.33.22.33 255.255.0.0

  isis enable 1

  mpls

  mpls templs rsvp-te

  Configuration of RTC:

  #

  mpls lsr-id 3.3.3.3

  mpls

  mpls te

  mpls rsvp-te

  mpls te cspf

  #

  isis 1

  is-level level-2

  cost-style wide

  network-entity 00.3333.3333.3333.00

  traffic-eng level-1-2

  log-peer-change

  # # interface Pos5/1/0 link-protocol ppp ip address 22.33.33.22 255.255.0.0 isis enable 1 mpls mpls te mpls rsvp-te When a neighbor relationship is set up between RTB and RTC and becomes robust, the following information can be found in the LSDB of RTB. Database information for IS-IS(1)

  Level-2 Link State Database LSPID Seq Num Checksum Holdtime Length ATT/P/OL 2222.2222.2222.00-00* 0x00007191 0x6689 1190 239 0/0/0 SOURCE 2222.2222.2222.00 NLPID IPV4 AREA ADDR 00 INTF ADDR 22.33.22.33 NBR ID 3333.3333.3333.00 COST: 10 +NBR ID 3333.3333.3333.00 COST: 10 IP-Internal 22.33.0.0 255.255.0.0 COST: 10 +IP-Extended 22.33.0.0 255.255.0.0 COST: 10 Router ID 2.2.2.2 3333.3333.3333.00-00 0x0000001c 0x14a3 1184 188 0/0/0 SOURCE 3333.3333.3333.00 NLPID IPV4

  AREA ADDR 00INTF ADDR 22.33.33.22 +NBR ID 2222.2222.2222.00 COST: 10 +IP-Extended 22.33.0.0 255.255.0.0 COST: 10 Router ID 3.3.3.3 Two records are generated for the same NBR ID, as shown in bold fonts. Which statement is true?

  A. The cost-style parameter of RTB is compatible. Therefore, two type-length-values (TLVs) (No.2 TLV and No.22 TLV) are generated locally. The two TLVs are the same in size.
  B. The cost-style parameter of RTB is compatible. Therefore, two TLVs (No.2 TLV and No.22 TLV) are generated locally. No.2 TLV is smaller than No.22 TLV.
  C. The cost-style parameter of RTB is compatible. Therefore, two TLVs (No.2 TLV and No.22 TLV) are generated locally. No.2 TLV is larger than No.22 TLV.
  D. It is an error indicating that the NBR TLV of a neighbor is added twice
  B. The cost-style parameter of RTB is compatible. Therefore, two TLVs (No.2 TLV and No.22 TLV) are generated locally. No.2 TLV is smaller than No.22 TLV.