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NEW QUESTION # 71
Four links between two switches establish an Eth-Trunk in manual mode, and the bandwidth of each link is 1 Gbit/s. One of the links fails. Which of the following statements are true about this scenario? (Select all that apply)
Answer: C,D
Explanation:
In an Eth-Trunk working in manual mode , multiple physical member links are bundled into one logical interface to provide higher bandwidth and link redundancy. If one of four 1 Gbit/s member links fails, the Eth- Trunk does not go down as long as at least one valid member link remains active. Therefore, statement A is correct. Since one link has failed and three member links remain available, the total available bandwidth becomes 3 Gbit/s , so statement B is also correct.
Statement C is incorrect because the traffic originally hashed to the failed link is not permanently stopped.
Instead, after the link failure is detected, traffic is redistributed across the remaining active member links according to the trunk load-balancing mechanism. Statement D is also incorrect because Eth-Trunk provides link-level redundancy. Existing upper-layer sessions such as TCP are not necessarily interrupted and re- established simply because one member link fails. HCIA-Datacom emphasizes that Eth-Trunk improves reliability and bandwidth utilization by allowing traffic to continue across surviving links when a single member fails. This is one of the main advantages of link aggregation in campus and data center switching networks.
NEW QUESTION # 72
You can enter a question mark (?) in the CLI of a Huawei switch to obtain online help. Which of the following statements is true about the meaning of < cr > in the output of the command sysname SW1?
[HUAWEI] sysname SW1?
< cr >
Answer: B
Explanation:
In the Huawei command-line interface, the question mark ? provides real-time command help based on the current input. When the output shows < cr > , it means that the command can end at that point by pressing Enter . In other words, there is no additional keyword or parameter required in that position. Therefore, option B is correct.
In the example sysname SW1?, the device interprets SW1 as a complete and valid hostname parameter for the sysname command. Since nothing else is required after the hostname, the CLI displays < cr > to indicate command completion is allowed. This behavior is common in Huawei devices and is important for daily operation and troubleshooting because it helps engineers understand whether a command is complete, whether more arguments are needed, or whether optional parameters are available. Options about incorrect keywords or incomplete commands do not apply here, because the entered command syntax is already valid.
Understanding < cr > is a basic but important CLI skill in HCIA-Datacom operations.
NEW QUESTION # 73
On a small WLAN shown in the figure, SW2 acts as a DHCP server to assign IP addresses to STAs, and the user data forwarding mode is direct forwarding. Which of the following traffic paths is used for a STA accessing the Internet after connecting to the WLAN through AP1?
Answer: A
Explanation:
In direct forwarding mode, user data is forwarded directly from the AP through the wired network to the upstream network without passing through the WAC. After the STA connects to AP1, traffic follows AP1 → SW1 → SW2 → Internet. The WAC is only used for control and management functions, not for data forwarding, so it is not in the user data path.
NEW QUESTION # 74
A router ID uniquely identifies a device in an AS, and must be present before the device can run OSPF. For a device running OSPFv2, if no router ID is manually configured, the system automatically selects one.
Answer: B
Explanation:
In OSPFv2, a router ID is required for OSPF to operate and uniquely identifies each router within an AS. If no manual router ID is configured, the system automatically selects the highest IP address of a loopback interface; if no loopback exists, it selects the highest IP address of a physical interface. Therefore, the statement is correct.
NEW QUESTION # 75
On the switched network shown in the figure, STP is enabled on all devices. SW1 is the root bridge. The port costs are shown in the figure. Other parameters retain the default values. After the network is stable, which of the following RPC values is calculated by SW3 for the path to SW1?
Answer: A
Explanation:
SW1 is the root bridge, so its cost is 0. SW3 calculates its Root Path Cost by selecting the lowest- cost path toward SW1.
There are two possible paths from SW3 to SW1:
Direct path SW3 → SW1: SW3 uses its port cost of 100 on the link to SW1, so RPC = 100.
Indirect path SW3 → SW2 → SW1: SW3 to SW2 has a cost of 40, and SW2 to SW1 has a cost of
50, so total cost = 40 + 50 = 90.
The lowest value is 90, so SW3's RPC is 90.
NEW QUESTION # 76
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