H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 15

H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 15

1. Which of the following statements regarding HTTPS is false?

   • A router cannot detect the viruses in HTTPS traffic through the IPS technology
   • HTTPS uses SSL to ensure data security
   • When a user attempts to visit a website using HTTPS, if the user’s browser cannot identify the digital certificate of the website, the user will be unable to access the website
   • By default, the HTTPS protocol uses TCP port 443

2. Which of the following statements regarding optimal route selection of various protocols is true?

   • All routes learned through OSPF in the LSDB are added to the IP routing table
   • The optimal route is selected after comparison costs of routes that are learned through BGP and destined for the same network segment
   • The optimal route is selected after comparison between preferences of routes that are learned through BGP and OSPF and that are destined for the same network segment
   • BGP routes with unreachable next hops are also added to the IP routing table

3. Most popular Layer 2 tunneling technologies include VXLAN, TRILL, NVGRE, and MPLS.

   • True
   • False

4. Which of the following statements regarding the EVPN Type5 route is false?

   • The IP prefix field in a Type5 route can carry either the host IP address or the network segment address
   • Type5 route is the IP prefix route
   • A Type5 route carries a Layer 3 VNI
   • A Type5 route carries both Layer 2 and Layer 3 VNIs

5. On an MPLS IBGP VPN, if only BGP and LDP are used to distribute labels, a maximum of two MPLS labels are added to packets.

   • True
   • False

6. When an advertised route is deleted from a BGP router, the BGP router sends an Update packet to withdraw the route. This Update packet carries the well-known mandatory attributes of the route to be withdrawn.

   • True
   • False

7. When an ABR is attached to an NSSA and translates from type 7 to type 5 LSA, it can aggregate the type 5 LSAs which are converted from type 7 LSAs.

   • True
   • False

8. On an MPLS IBGP VPN, different CEs can use different routing protocols to exchange routing information with the same PE, and the routing protocols used between the CEs and PE are independent of each other.

   • True
   • False

9. A router receives a BGP route carrying the no-export community attribute. How will the router process this BGP route?

   • The router will discard it
   • The router will not advertise it to other BGP routers
   • The router will advertise it to IBGP peers only
   • The router will advertise it normally, but does not forward data through this route

10. Which of the following statements regarding the process in which the source DR registers with the RP on a PIM-SM network is true?

    • The Register message is a multicast packet
    • The Register message is used to set up an RPT between the source DR and RP
    • After receiving the Register message, the RP sends a Register-Stop message
    • The Register message carries multicast service data

11. Which of the following SDN controllers uses VXLAN technology?

    • Agile Controller-DCN
    • Agile Controller-WAN
    • Agile Controller-Campus

12. In RSTP, which port type can provide a backup path to the root of the spanning tree and what is the state of this type of port?

    • Root port in Listening state
    • Alternate port in Forwarding state
    • Alternate port in Learning state
    • Designated port in Listening state
    • Alternate port in Discarding state

13. On a shared network, which of the following mechanisms is used by PIM-SM to prevent duplicate traffic?

    • Register mechanism
    • BSR/RP mechanism
    • Assert mechanism
    • Join/Prune mechanism

14. Which of the following statements regarding the assert mechanism is true?

    • The assert mechanism is used for DR election
    • In the assert mechanism, the winner forwards multicast data to the broadcast network
    • In the assert mechanism, the loser shutdown the interface connected to the broadcast network
    • IP addresses are not used for winner election

15. Which of the following statements regarding MPLS BGP VPN is false?

    • PEs and CEs can exchange routing information using static routes, OSPF multi-instance, IS-IS multi-instance, and EBGP.
    • BGP SoO is used to prevent the routes advertised from a VPN site from returning to the site after traversing the MPLS backbone network. SoO is an extended community attribute automatically generated by MP-BGP.
    • Typically, PEs at both ends of an IBGP session establish, a stable BGP peer relationship using the loopback interface address.
    • The TTL field in the label is used to prevent loops.

16. An enterprise sets up an OSPF network with the topology and areas shown in the diagram. OSPF adjacencies are formed between all devices on all links and all loopback interface addresses are advertised by OSPF. A fault occurs and the links from R1 to S2 and R2 to S1 fail. Which of the following statements are true? (Choose all that apply.)

    

    •  R5 can learn the route to the loopback interface of R2.
    • R3 can learn the route to the loopback interface of R2.
    • R1 can learn the route to the loopback interface of R2.
    • R3 can not learn the route to the loopback interface of R2.

17. OSPF has been configured on R1 as shown above, but R1 does not learn the routes from any other routers, which of the following are possible causes? (Choose all that apply.)

    

    • The area ID configured on R1 is different from that configured on its neighbors.
    • The network address advertised by R1 does not match the interface mask.
    • No OSPF process ID is configured on R1.
    • The authentication function is not configured on R1, but configured on its neighbors.

18. You need to ensure that only Telnet traffic can access the server whose IP address is 10.1.1.100. You configure the following ACL on the router:

    

    Then you apply the ACL to the inbound direction of the router’s serial interface. Which of the following types of packets are allowed to pass through the router?

    • Non-fragmented packets that access the server through port 21.
    • Non-initial fragments that access the server through port 23.
    • Non-initial fragments that access other hosts.
    • Non-initial fragments that access the server through port 21.
    • Initial fragments or non-fragmented packets that access the server through port 23.