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NEW QUESTION # 31
Defining OSPF areas in a large network helps reduce the size of the LSDB maintained by each router. If both R1 and R2 are assigned to area 1, they have the same LSDB within that area.
Answer: B
Explanation:
OSPF divides a large routing domain into areas so that link-state information can be contained and the processing burden on individual routers can be reduced. Within a given OSPF area, routers exchange LSAs and synchronize the area ' s link-state database. After the network has converged and the participating routers have full adjacency where required, routers in the same area maintain a consistent view of that area ' s topology. Each router then runs the SPF algorithm independently against that common LSDB, using itself as the root, so the calculated shortest-path tree can differ in perspective even though the underlying area topology database is the same. Area boundaries also limit which detailed LSAs need to be maintained by routers outside the area, which is one reason hierarchical OSPF scales better than a single very large area. The statement should be understood under normal, converged OSPF operation; simply sharing an area number without connectivity would not create synchronization. In the intended HCIA Datacom context, R1 and R2 participating in the same area maintain the same area LSDB. Therefore the answer is TRUE, option A.
NEW QUESTION # 32
To ensure that the same data flow can be forwarded through the same physical link in a link aggregation group (LAG) and different data flows can be load balanced among different physical links in the LAG, the administrator needs to enable per-packet load balancing on the devices at both ends of the LAG.
Answer: B
Explanation:
Per-packet load balancing is not required to ensure that the same data flow stays on the same physical link. In fact, per-packet load balancing can cause packet reordering and is generally not used for preserving flow consistency. Consistent flow-based load balancing (such as hash-based methods) is what ensures that the same data flow is always forwarded over the same member link in a LAG.
NEW QUESTION # 33
Which of the following variables defined in Python code is invalid?
Answer: B
Explanation:
In Python, variable names must follow identifier rules: they cannot start with a digit. The variable
2_r1 is invalid because it begins with the number 2, which violates Python naming conventions.
The other variables are valid because they either start with letters or underscores and follow proper identifier rules.
NEW QUESTION # 34
The emergence of AI poses new requirements on data center networks. To meet AI computing requirements, a high-speed intelligent computing data center network with zero packet loss needs to be constructed. Which of the following statements are false about the requirements and solutions of intelligent computing data center networks? (Select all that apply)
Answer: A,B
Explanation:
The false statements are A and D. Option A is considered false in HCIA-Datacom wording because intelligent computing data center networks aim to build a lossless Ethernet fabric through coordinated technologies such as high-bandwidth interfaces, deep buffers, PFC, ECN, congestion control, and optimized forwarding. The exam-oriented knowledge point treats these technologies as solutions for a zero packet loss network design goal rather than stating that a truly lossless network cannot be achieved.
Option D is also false because RDMA is used to reduce end-to-end communication latency and CPU overhead between servers, especially for east-west traffic in AI and high-performance computing clusters. It is not specifically described as reducing latency between GPU servers and physical switches. That wording is inaccurate.
NEW QUESTION # 35
On an STP network, an administrator wants SW2 to be elected as the root bridge. Which of the following methods can be used to achieve this goal?
Answer: B
Explanation:
In STP, the root bridge is elected based on the lowest bridge ID (BID). A BID is composed of the bridge priority and the MAC address of the switch. The device with the smallest BID becomes the root bridge.
Therefore, if an administrator wants SW2 to become the root bridge, the most direct and correct method is to configure a lower system priority on SW2, making option C correct.
Option A is incorrect because port priority affects port-role selection in some tie-breaking scenarios, but it does not determine root-bridge election. Option B is the opposite of what is required, because a higher system priority makes the BID larger and reduces the chance of being elected as root. Option D is also incorrect because root path cost is used by non-root bridges to select the best path to the existing root bridge; it does not determine which switch becomes the root bridge in the first place. HCIA-Datacom stresses that bridge priority tuning is the standard administrative method used to control root bridge placement in campus networks for stable and predictable Layer 2 topology design.
NEW QUESTION # 36
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