H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 02

H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 02

1. Which of following statements is true about IS-IS LDP synchronization?

   • LDP establishes a neighbor relationship faster than IS-IS, so LDP synchronization is disabled by default
   • LDP synchronization can prevent traffic loss during an active/standby link switchover
   • LDP synchronization can be enabled globally 
   • LDP synchronization can be configured on Loopback interfaces

2. When a router within the HW network makes a forwarding decision, the _____is always used to select the best route from those installed in the routing table.

   • Routing process ID
   • Longest prefix match 
   • Administrative Distance
   • Router ID
   • Peer ID

3. Which of the following are found in a basic Network Layer Packet?

   • Network Layer Header 
   • Path records
   • Data Link Layer Header
   • Upper Layer Data
   • Network Layer Trailer 

4. OSPF is running on a network. In OSPF, what LSA type would only cause an Incremental SPF calculation?

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

5. With regard to TCP headers, which control bit tells the receiver to reset the TCP connection?

   • SND
   • CLR
   • PSH
   • SYN
   • RST 
   • ACK

6. Two routers configured to run BGP have been connected to a firewall, one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer, including the correct BGP session endpoint addresses and the correct BGP session hop-count limit (EBGP multihop). What is a good first test to see if BGP will work across the firewall?

   • There is no way to make BGP work across a firewall without special configuration, so there is no simple test that will show you if BGP will work, other than trying to start the peering session.
   • Attempt to Telnet from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If Telnet works, BGP will work, since telnet and BGP both use TCP to transport data 
   • There is no way to make BGP work across a firewall
   • Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them, BGP should work, since BGP uses IP to transport packets.

7. Which of the following can be used for BGP route selection?

   • DSCP
   • IP-PREFIX 
   • ACL 
   • AS-PATH-FILTER 

8. Authentication can be configured in the IS-IS protocol to enhance IS-IS security. The IS-IS authentication functions include interface authentication, area authentication, and routing domain authentication.

   • FALSE
   • TRUE 

9. Each DD packet has a DD sequence number for packet acknowledgment. A DD sequence number is two-bytes long.

   • TRUE
   • FALSE 

10. You must configure a router for Policy Based Routing (PBR). PBR allows network administrators to implement routing policies to allow or deny paths on which of the following?

    • Protocol 
    • Identification of a particular end system 
    • Application 
    • Throughput
    • Size of packets 

11. An AS-path-filter uses the regular expression ^[0-9]+$ to indicate all as-path attributes.

    • TRUE
    • FALSE 

12. Which of the following scenarios can an AS-path-filter be used for?

    • Apply clauses in a route-policy 
    • Filtering the routes received from a BGP peer based on the as-path attributes of the routes, for example, peer X.X.X.X as path-filter import 
    • Filtering the routes sent to a BGP peer based on the as-path attributes of the routers, for example, peer X.X.X.X as-path-filter export 
    • If-match clauses in a route-policy

13. Which of the following statements are true about RIPng?

    • RIPng does not have an authentication mechanism 
    • Each RIPng update packet contains a maximum of 25 routes
    • RIPng supports MD5 authentication
    • RIPng uses the link local address to send update packets 
    • RIPng supports a maximum of 32 hops

14. An IPv6 device with the address of FC00::1 connects to the network and captures the following data packet. What is function of the data packet?

    

    • There are multiple routers on the network segment. One router advertises router redirect messages to the IPv6 device.
    • The router on this network segment tests the working status of the IPv6 device
    • The IPv6 device implements self-loop tests
    • Another device on this network segment requests to resolve the Layer 2 address of the IPv6 device
    • The IPv6 device requests the address of the egress router
    • The IPv6 device checks address configuration of other devices on the network 

15. Which of the following are legal representations of the IPv6 prefix 12AB00000000CD30?

    • 12AB::CD3::/64
    • 12AB::CD30/64
    • 12AB::0000:0000:CD30:0000:0000:0000:0000/64
    • 12AB:0:0:CD3::/64
    • 12AB:0:0:CD3/64

16. On a RIPng network, configure a router to advertise the default route to the entire network. Which of the following configurations is correct?

    • [Huawei]ripng 1
      [Huawei-ripng-1]import-route static cost 2
      [Huawei-ripng-1]quit
      [Huawei]ipv6 route-static :: 0 NULL0
    • [Huawei]ripng 1
      [Huawei-ripng-1]import-route static cost 2
      [Huawei-ripng-1]quit
      [Huawei]ipv6 route-static :: 0 2001:19:9
    • [Huawei]ripng 1
      [Huawei-ripng-1] ripng default-route originate
      [Huawei-ripng-1]quit
    • [Huawei]interface GigabitEthernet0/0/1
      [Huawei-GigabitEthernet0/0/1]ipv6 enable
      [Huawei-GigabitEthernet0/0/1]ipv6 address 2001::12::1/64
      [Huawei-GigabitEthernet0/0/1]ripng 1 enable
      [Huawei-GigabitEthernet0/0/1]ripng default-route originate
      [Huawei-GigabitEthernet0/0/1]quit

17. Which IPv6 header field has a function similar to that of the “Type of Service” field in an IPv4 header?

    • Flow Label
    • Traffic Class 
    • Next Header
    • Version

18. Besides an IPv4 address, a router distinguisher (RD) also contains an identifier that distinguishes IP routes to the same destination IP address in different VPNs. How many bits are there in the identifier?

    • 16
    • 64
    • 128
    • 32

19. Which of the following statements about penultimate hop popping are true?

    • It can only be used with LDP
    • It enables the Edge LSR to request a label pop operation from its upstream neighbors 
    • It is only used when two or more labels are stacked
    • It is requested through LDP using a special label value that is also called the implicit-null value 
    • It is used only for directly connected subnets or aggregate routes 

20. Based on the routing information exchange mode, MPLS VPNs are usually classified into two types. One is the overlay VPN. What is the other type of MPLS VPN?

    • L3 VPN
    • Virtual Private Network
    • L2 VPN
    • Peer-to-Peer VPN