Huawei H12-891_V1.0 HCIE-Datacom V1.0 Exam Exam Practice Test Questions

• Question 1

  What is the significance of reserved multicast address 224000~22400255?

  • The multicast address range is reserved for the management of multicast addresses, and is valid locally
  • The address identifies Global lnternet, and the address range is valid for the entire network
  • This multicast address range is reserved for the management of multicast addresses, which cannot transmit multicast traffic to the Internet
  • Any legitimate multicast traffic and multicast application Junhui adopts an address change
  • The multicast address range is reserved for link-local multicast traffic, including network control messages, and the address range is only valid locally

  Show Answer Answer: E Next

• Question 2

  What are some of the following misrepresentations about URPF, IPSG, and DAI technologies? ( Multiple choice questions).

  • DAI does not support manual configuration of binding tables.
  • IPSG checks the source IP address and source MAC address of the IP packet , and DAI only checks the correspondence between the IP and the MAC.
  • URPF can be used to protect against DDoS spoofed source attacks.
  • IPSG technology checks IP packets for source IP spoofing attack prevention, while DAI checks ARP packets to filter attack sources.

  Show Answer Answer: A, B Next

• Question 3

  LDP messages are exchanged between LDLRs running the LDP protocol, and LDP messages can be divided into four types according to function, which of the following is not an LDP message type ?

  • Advertisement message
  • Discover message
  • Conversation message
  • Label Exchange Information

  Show Answer Answer: D Next

• Question 4

  Man-in-the-middle attacks or IP/MAC spoofing attacks can lead to information leakage and other hazards, and are more common in the intranet, in order to prevent man-in-the-middle attacks or IP/MAC spoofing attacks, you can take the configuration method

  • Enable DHCP snooping to check the chaddr field in a DHCP request message
  • Configure the trusted/untrusted interface
  • Configure DHCP snooping on the switch to interbolde with DAI or IPSG
  • Limit the maximum number of MAC addresses allowed to be learned on the switch interface

  Show Answer Answer: C Next

• Question 5

  D Class IP address range 239000-239255255,What does 255 do? Radio

  • SSM multicast address, the multicast address segment is valid for the whole network
  • Any legitimate multicast traffic and multicast application can adopt this address
  • Locally managed multicast address, which is valid only locally
  • Link-local multicast address, where traffic that uses that address includes network control messages and that address range is only the multicast address segment used by the E. routing protocol

  Show Answer Answer: C Next