H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 14

H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 14

1. The DSCP value of VoIP traffic on Huawei network devices needs to be set to EF. According to the RFC about DSCP, which value should EF be set to?

   • 5 in decimal notation
   • 101110 in binary notation
   • 0xEF
   • 36 in decimal notation

2. Which of the following statements regarding FTP is true?

   • In FTP passive mode, the client initializes TCP control and data sessions
   • In FTP active mode, the server uses the PORT command to notify the client of the port through which data is transmitted
   • FTP always uses a TCP session to transmit control and data information
   • FTP always uses TCP port 20 to establish a data session and TCP port 21 to establish a control session
   • FTP always uses TCP port 21 to establish a data session and TCP port 20 to establish a control session

3. Which of following statements regarding VRRP groups in load balancing mode are true?

   • Hosts in the same LAN need to be configured with different virtual routers as their default gateways
   • At least two virtual routers need to provide forwarding services simultaneously
   • When configuring the priority, ensure that the same router functions as the master device for three VRRP groups
   • Multiple VRRP groups can be created on an interface of a router. The router functions as a master device of a VRRP group or a backup device of other VRRP groups

4. Which of the following route types is used to advertise external routes in BGP EVPN?

   • Type 2
   • Type 5
   • Type 1
   • Type 4
   • Type 3

5. Assume R1 and R2 have a valid level-2 ISIS peering for IPv6 and the additional configuration shown is applied. Which of the following statements about routing entries on R2 are true?

   

   •  2022:: /64 will be displayed in the IPv6 routing table.
   • 2021:: /64 will be displayed in the IPv6 routing table.
   • 2019:: /64 will be displayed in the IPv6 routing table.
   • 2020:: /64 will be displayed in the IPv6 routing table.

6. Which of the following combinations will provide the optimal solution for deploying a loop-free Layer 2 network?

   • TRILL + MSTP
   • Stack + link aggregation
   • Link set + MSTP
   • Stack + MSTP

7. Which of the following statements regarding MUX VLANs on Huawei switches is true?

   • A MUX VLAN consists of principal VLANs and subordinate VLANs. Subordinate VLANs are classified into separate VLANs and isolated VLANs.
   • A principal port can communicate with all ports in a MUX VLAN.
   • MUX VLANs and super VLANs can be used together in one VLAN.
   • Each separate VLAN can be bound to multiple principal VLANs.

8. During troubleshooting for a LAN where Huawei devices are deployed, you find that there are a large number of unicast frames with unknown source MAC addresses. What is the most severe impact these unicast frames have on the switch?

   • TCAM entries are occupied
   • The power consumption is increased
   • The available MAC address entries are consumed
   • The available bandwidth is consumed
   • The memory for buffering frames is occupied

9. Interface Serial 0 of a router is enabled for OSPF Area 1, Serial 0 is configured as a silent interface. What is the impact of this configuration?

   • The OSPF router receives updated routes from its neighbor
   • The OSPF router establishes an available adjacency through this interface
   • The OSPF router does not add the routes learned from the interface to the local routing table
   • The OSPF router does not establish any adjacency through this interface

10. Which of the following route selection tools is unique for BGP?

    • Route-policy
    • IP-prefix
    • ACL
    • AS-Path-filter

11. If no default route exists in the local IP routing table, the default-route imported command can be executed to advertise default routes to BGP peers or BGP peer groups.

    • True
    • False

12. Which of the following statements about IS-IS LSDB synchronization on the broadcast network, shown in the diagram, is true?

    

    • R2 functions as the DIS and periodically sends CSNPs
    • R2 functions as the DIS and sends Hello PDUs at an interval three times that of non-DIS routers
    • R1 and R3 maintain the LSDB consistency by sending PSNPs periodically
    • R2 functions as the DIS and does not receive PSNPs from other routers

13. OSPFv3 is a version of OSPF for IPv6 and is different from OSPFv2. OSPFv3 is based on links but OSPFv2 is based on network segments. Which of the following statements is false?

    • When an OSPFv3 router obtains routing information from a neighbor, it uses the link-local address of the neighbor as the next hop for packet forwarding.
    • Two OSPF routers on the same physical link can still establish a neighbor relationship even if no unicast IPv6 address is configured.
    • Two OSPF routers on the same physical link can still establish a neighbor relationship even if their IPv6 addresses are on different networks.
    • Except for virtual links, all OSPFv3 interfaces use a link-local address as the destination address of OSPFv3 message.

14. On a P2P network, CSNPs are not sent during the establishment of an IS-IS neighbor relationship.

    • True
    • False

15. IPv6 devices can obtain information such as the interface address, gateway address, and DNS address through DHCPv6.

    • True
    • False

16. The Next Header field only exists in the basic header of an IPv6 packet, and its function is only to indicate whether the IPv6 packet has an extension header.

    • True
    • False

17. Which of the following statements regarding features of the inter-AS VPN Option C are true?

    • VPN routes are directly exchanged between the ingress PE and the egress PE, and the routes do not need to be stored or advertised by the intermediate devices.
    • The inter-AS VPN Option C mode is not applicable to scenarios where multiple Ass are spanned.
    • A maximum of two labels are required for packet forwarding.
    • ASBRs do not store VPNv4 routes or advertise VPNv4 routes to each other.

18. Which of the following statements correctly describe the LDP session establishment process?

    • The label switching router (LSR) with the larger transport address initiates a TCP connection.
    • After two devices receive a Keepalive message from each other, the LDP session is successfully established.
    • LDP Neighbor Discovery Hello messages are encapsulated using TCP with the multicast destination address of 224.0.0.2.
    • After the TCP connection is successfully established, the active party sends an Initialization message to negotiate with the passive party about parameters used for establishing an LDP session.

19. On an MPLS BGP VPN where MPLS Penultimate Hop Popping (PHP) is disabled, when packets arrive at the last-hop PE, packets carry two MPLS labels which can be the same value.

    • True
    • False

20. On a multicast network, in which of the following situations can multicast traffic not be forwarded?

    • There are not any RPF route in the router
    • The upstream router discards the received PIM Join message
    • PIM is disabled on the RPF interface
    • On a multi-router egress network, the local router is not a DR