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Free H12-891_V1.0 Exam Braindumps (page: 43)

Page 42 of 153
PDF with 610 Questions

The correct description of the extended features of ISIS is ?

  1. When the amount of information in the Link State Protocol data packet PDU to be released by ISIS is too large, the ISIS router will generate multiple LSP shards to carry more ISIS information.
  2. ISIS can choose whether to authenticate incoming SNP and LSP packets
  3. If there are other vendors' devices on the network and do not support the LSP sharding function, the sharding expansion mode must be configured as Model-1, otherwise the message will not be recognized by other vendors' devices.
  4. After you enable the LSP shard extension feature of your router, you can use it without restarting the ISIS process.

Answer(s): A,B,C



In MPLSVPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address, and the following options are described correctly as ?

  1. RD can be used to control the publication of VPN routing information
  2. On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
  3. RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
  4. After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network

Answer(s): B



What improvements have been made to the IGMPv2 protocol compared to IGMPv1? ( Multiple Choice)

  1. Added maximum response time field
  2. Added high group messages
  3. Added specific group query message
  4. Added a specific source group query packet

Answer(s): A,B,C



RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are ?

  1. Multicast network statically configures RP, while RTA router does not statically configure RP
  2. The RP elected by RTA is not an RTB
  3. RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source
  4. The multicast network dynamically elects the RP instead RTA failed RPF check for BSR

Answer(s): A,B,C,D






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