HCIP-Datacom-Core Technology V1.0 v1.0
Question 1
BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets?
- A. 4784
- B. 2784
- C. 5784
- D. 3784
Answer : A
Question 2
One VRRP virtual router can only have the virtual IP address.
- A. TRUE
- B. FALSE
Answer : B
Question 3
The interface IP address and VRRP virtual IP address can be the same
- A. TRUE
- B. FALSE
Answer : A
Question 4
What is the default sending interval of BFD packets?
- A. 100ms
- B. 1000ms
- C. 10s
- D. 5s
Answer : A
Question 5
Which of the following statements about a DHCP server on a large-scale Layer 3 WLAN are false? (Choose all that apply.)
- A. APs can obtain the AC’s IP address from a DHCP server using Option 43.
- B. APs can obtain the AC’s IP address from a DHCP server using Option 60.
- C. An independent DHCP server is recommended.
- D. The AC is recommended as a DHCP server.
Answer : BD
Question 6
As shown in the figure, data traffic from a STA is forwarded by the HAP to the upper-layer network in direct forwarding mode before roaming, and the HAP is configured as the home agent. What is the flow direction of data traffic after Layer 3 roaming?
- A. STA -> FAP -> FAC -> HAC -> HAP -> Upper-layer network
- B. STA -> FAP -> FAC -> HAC -> HAP -> HAC -> Upper-layer network
- C. STA -> FAP -> FAC -> HAC -> Upper-layer network
- D. STA -> FAP -> FAC -> Upper-layer network
Answer : A
Question 7
MAC address-prioritized Portal authentication allows disconnected users who have completed Portal authentication to directly access the network again within a certain period of time after the disconnection without having to perform Portal authentication again.
- A. TRUE
- B. FALSE
Answer : A
Question 8
Which of the following statements about the AC's mobility group are false? (Choose all that apply.)
- A. STAs can roam only between ACs in the same mobility group.
- B. The mobility server must be an AC in the local mobility group.
- C. A mobility server needs to be specified for member ACs in a mobility group.
- D. ACs in the same mobility group encapsulate and transmit roaming information over the DTLS extended tunnel.
Answer : AB
Question 9
Which of the following IEEE 802.11 standards is also known as Wi-Fi 6?
- A. 802.11n
- B. 802.11b
- C. 802.11ac
- D. 802.11ax
Answer : D
Question 10
Which of the following statements about the forwarding plane of a switch is false?
- A. Provides high-speed and non-blocking data channels.
- B. Can collect packet statistics.
- C. Can encapsulate and decapsulate packets.
- D. Consists of main control boards and interface boards.
Answer : D
Question 11
Which of the following statements regarding DR/BDR are false? (Choose all that apply.)
- A. In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally.
- B. All DR others establish neighbor relationships with DR and BDR only.
- C. DR others listen on the multicast address 224.0.0.5.
- D. DR others listen on the network address 224.0.0.6.
Answer : AD
Question 12
Which of the following statements regarding router ID in dynamic routing protocols is false?
- A. After a router ID changes, router ID of each protocol will change without requiring additional operations.
- B. If no router ID is manually configured and loopback interface addresses are configured, the largest loopback interface address is used as the router ID.
- C. If a router ID is manually configured using the router-id command, this router ID will be used.
- D. If no router ID and no loopback interface address are configured, the largest physical interface IP address is used as the router ID.
Answer : A
Question 13
Which of the following statements regarding OSPF AS-External-LSA are true? (Choose all that apply.)
- A. Net mask is set to all 0s.
- B. Advertising Router is set as the router ID of an ASBR.
- C. Link State ID and Advertising Router can uniquely identify an AS-External-LSA.
- D. Link State ID is set as an address on the destination network segment.
Answer : BC
Question 14
Which of the following statements regarding BGP peer are false? (Choose all that apply.)
- A. BGP peers exchange link state information.
- B. A UDP connection must be established before BGP relationships are established.
- C. BGP routers support automatic neighbor discovery.
- D. BGP peers must be configured with MD5 authentication.
Answer : ABC
Question 15
Which of the following statements regarding BGP message types and characteristics is false?
- A. Hello messages are periodically sent between BGP peers to maintain their connection.
- B. Update messages are used to exchange routing information between BGP peers.
- C. Open messages are used to establish a peer relationship between two neighbors.
- D. Notification messages are used to transmit error information between BGP Speakers.
Answer : A