Huawei H31-161 Online Practice Questions and Exam Preparation

Huawei H31-161 Online Questions & Answers

• Question 21:

  RTA is an edge router of the MPLS backbone network. It provides the access service for users under Layer 2 switches and differentiates users by subinterface. User A accesses VLAN 100 and has subscribed to the HSI, VoIP, and IPTV services. According to 802.1p priorities, the value 0 indicates the HSI service, 1 indicates the VoIP service, and 4 indicates the IPTV service. The DiffServ model is deployed in E-LSP mode on the MPLS network, and the STC is configured for subinterfaces on the access side of RTA (the qos phb disable command is not configured). Outgoing traffic on the G1/0/0.1 subinterface involves the HSI, VoIP, and IPTV services on the access side of RTA. Which statement about EXP values corresponding to these three services is true?

  

  A. Only one EXP value may be contained, and the value is uncertain.
  B. Only two EXP values may be contained, and the values are uncertain.
  C. At least three EXP values may be contained, and the values are uncertain.
  D. The EXP values must be 0, 1, and 4.
  C. At least three EXP values may be contained, and the values are uncertain.

• Question 22:

  # pim

  c-rp Ethernet6/2/0 timer hello 100 state-refresh-interval 10 state-refresh-ttl 60 Interface Ethernet6/2/0Ip address 20.1.1.3 255.255.255.0 Pim timer hello 45 Pim dm # Which of the following statements are false?

  A. If the PIM-DM is enabled at Ethernet 6/2/0 on a router, the PIM-SM cannot be enabled at other interfaces on the router.
  B. Ethernet 6/2/0 sends a PIM hello message every 100 seconds.
  C. The TTL value is 60 in state-refresh messages sent by the router.
  D. Ethernet 6/2/0 sends a state-refresh message every 10 seconds.
  B. Ethernet 6/2/0 sends a PIM hello message every 100 seconds.
  D. Ethernet 6/2/0 sends a state-refresh message every 10 seconds.

• Question 23:

  The Huawei router is the last hop DR where the SSM Mapping function is enabled at the interface.

  Some IGMPv2 hosts expect to receive (1.0.0.1, 232.1.0.1), (1.0.0.1, 232.1.0.2), and (2.0.0.1,232.1.3.2) data. How can you satisfy the preceding requirements with the least configurations?

  A. ssm-mapping 232.1.0.2 32 1.0.0.1
  B. ssm-mapping 232.1.0.1 32 1.0.0.1
  C. ssm-mapping 232.1.0.0 24 1.0.0.1
  D. ssm-mapping 232.1.3.2 16 2.0.0.1
  E. ssm-mapping 232.1.3.1 24 2.0.0.1
  F. ssm-mapping 232.1.3.0 8 2.0.0.1
  C. ssm-mapping 232.1.0.0 24 1.0.0.1
  E. ssm-mapping 232.1.3.1 24 2.0.0.1

• Question 24:

  On the BGP network, which of the following policies can be used to prevent BGP-targeted attacks?

  A. Enable the BGP authentication function between BGP peers.
  B. Only packets carrying the loopback IP addresses of service routers can pass through the interface, and all other packets are discarded.
  C. At the outbound interface of a router, filter the TCP packets of a non-service router. The ID of the destination interface is 179 at the loopback IP address of the non-service router.
  D. At the inbound interface of a router, filter the TCP packets of a non-service router. The ID of the destination interface is 179 at the loopback IP address of the non-service router
  A. Enable the BGP authentication function between BGP peers.
  D. At the inbound interface of a router, filter the TCP packets of a non-service router. The ID of the destination interface is 179 at the loopback IP address of the non-service router

• Question 25:

  About the merits and demerits of inter-AS VPN-IPv4 Option B using MP-EBGP between ASBRs, which statement is true?

  A. The inter-AS scheme in Option B is an inherent feature of VPN.
  B. VRFs matching PEs must be configured on the ASBR.
  C. An ASBR is required to store all VPN routes, which challenges the performance of the ASBR.
  D. An ASBR does not store VPN routes but sends them out as label data.
  C. An ASBR is required to store all VPN routes, which challenges the performance of the ASBR.

• Question 26:

  Which message does the pseudo wire emulation edge-to-edge (PWE3) add for LDP signaling extension compared with Martini VLL?

  A. Request
  B. Mapping
  C. Withdraw
  D. Release
  E. Notification
  E. Notification

• Question 27:

  Which of the following statements about the merits of the HoVPN networking are true?

  A. If the UPE are SPE are separated by an IP/IPMLS network, they can be connected through a generic routing encapsulation (GRE) or LSP runnel . A hierarchical MPLS VPN provides good scalability.
  B. The SPE and UP exchange routes and advertise labels through MP-BGP. Each UPE runs only one ?BGP peer, reducing system overheads and simplifying configuration.
  C. The BGP/MPLS VPN can be deployed layers by layer. When the performance of a super strum provider edge (SPE) is insufficient, a user-end provider edge (UPE) can be added and the SPE moved to a lower layer. When the access capability of a UPE is insufficient, and SPE can be added.
  D. Packets are forwarded between a UPE and an SPE after being label. The UPE and SPE are connected through an interface (or a subinterface), helping reduce the usage of limited interface resources.
  E. Only local VPN routes need to be maintained on an SPE and remote routes on the SPE are represented by a default route or an aggregate route, reducing the load of the SPE.
  A. If the UPE are SPE are separated by an IP/IPMLS network, they can be connected through a generic routing encapsulation (GRE) or LSP runnel . A hierarchical MPLS VPN provides good scalability.
  B. The SPE and UP exchange routes and advertise labels through MP-BGP. Each UPE runs only one ?BGP peer, reducing system overheads and simplifying configuration.
  D. Packets are forwarded between a UPE and an SPE after being label. The UPE and SPE are connected through an interface (or a subinterface), helping reduce the usage of limited interface resources.

• Question 28:

  The inner VLAN tag in layer 2 user packets is used to differentiated key services from other services. If packets are not processed after being encapsulated by QinQ, the 802. 1p information of the inner VLAN tag becomes invalid. After the QinQ is employed, three methods can be used to configure conditions for sensing 8021p configuration of the inner VLAN tag:

  1.

  Reset the 802.1p of the outer VLAN tag regardless of the existing 02 1p configurations of the inner VLAN tag.

  2.

  Automatically swap the 802. 1p configurations of the inner VLAN tag to that of the outer VLAN tag.

  3.

  Reset the 802.1p configurations of the outer VLAN tag based on the existing 802.1p configurations of the different VLAN tags

  A. True
  B. False
  A. True

• Question 29:

  Refer to the exhibit.

  

  As shown in the figure, VPN routes are transmitted between PE 1 and PE 2 through BGP. OSPF process 100 runs on both PEs and CEs. The following BGP route exists on PE 2. [PE 2]display bgp vpnv4 vpn-instance red routing-table 43.1.1.0 BGP local router ID: 194.1.1.1 Local AS number: 100 Paths: 1 available, 1 best BGP routing table entry information of 43.1.1.0/24: Label information (Received/Applied): 15362/NULL From: 1.1.1.1 (192.2.1.1) Relay Nexthop: 0.0.0.0 Original nexthop: 1.1.1.1 Ext-Community: RT <100: 1>, <555: 0>, <0.0.0.0: 256>, <111.1.1.1: 0> Convergence Priority: 0 AS-path Nil, origin incomplete, MED 7, localpref 100, pref-val 0, valid, intern al, best, pre 255 Not advertised to any peer yet If the domain ID configured on PE 2 is 555, which statement is true?

  A. The domain ID in the BGP route is the same as that configured on PE 2 and the route type is specified by a Type 1 LSA. Therefore, PE 2 needs to generate a Type 1 LSA and send it to CE 2.
  B. The domain ID in the BGP route is the same as that configured on PE 2 and the route type is specified by a Type 1 LSA. Therefore, PE 2 needs to generate a Type 3 LSA and send it to CE 2.
  C. The domain ID in the BGP route is the same as that configured on PE 2 and the route type is specified by a Type 1 LSA. Therefore, PE 2 needs to generate a Type 5 LSA and send it to CE 2.
  D. The domain ID in the BGP route is different from that configured on PE 2 and the route type is specified by a Type 1 LSA. Therefore, PE 2 needs to generate a Type 5 LSA and send it to CE 2.
  B. The domain ID in the BGP route is the same as that configured on PE 2 and the route type is specified by a Type 1 LSA. Therefore, PE 2 needs to generate a Type 3 LSA and send it to CE 2.

• Question 30:

  display current-configuration multicast routing-enable # acl number 2000 rule 5 permit source 225.0.0.0 0.0.0.255

  # interface Ethernet6/1/0 ip address 10.1.1.1 255.255.255.0 igmp enable pim sm # igmp # pim ssm-policy 2000 # return The preceding are partial multicast router configurations. Which of the following configurations are required to configure the SSM Mapping on Ethernet 6/1/0 and map IGMPv2 Report messages for multicast group 225.0.0.1 to multicast source

  2.2.2.2?

  A. ssm-mapping 225.0.0.0 255.255.255.0 2.2.2.2
  B. igmp on-demand
  C. igmp prompt-leave
  D. igmp ssm-mapping enable
  A. ssm-mapping 225.0.0.0 255.255.255.0 2.2.2.2
  D. igmp ssm-mapping enable