Which of the following statements are true about distributed storage?
Answer(s): A,B,D
Comprehensive and Detailed Explanation (HCIACloud Computing aligned):Distributed storage is a core concept in cloud computing and is emphasized in HCIACloud Computing as a foundational technology for large-scale cloud platforms.Option A is true. Distributed storage is designed for horizontal scalability, allowing storage capacity and performance to increase simply by adding more nodes.Option B is true. Unlike traditional centralized storage systems, distributed storage typically runs on general-purpose x86 servers, reducing cost and improving flexibility.Option C is false. Distributed storage does not rely on traditional RAID for data protection. Instead, it uses data replication or erasure coding, which are more suitable for large-scale distributed environments.Option D is true. Distributed storage eliminates the need for dedicated controller enclosures or disk enclosures. Storage resources are directly provided by general-purpose servers, which aligns with cloud-native architecture principles described in HCIA materials.
A switch can learn the source and destination MAC addresses of traffic and add the addresses to a MAC address table. It cannot isolate collision domains.
Answer(s): B
Comprehensive and Detailed Explanation (HCIACloud Computing aligned):In the HCIACloud Computing curriculum, Ethernet switches are core components of the data center network and operate mainly at the data link layer. One of their key functions is MAC address learning. When a switch receives a frame, it records the source MAC address and the corresponding incoming port in the MAC address table. This allows the switch to forward subsequent frames intelligently.More importantly, a switch can isolate collision domains, which makes the statement false. Each switch port represents an independent collision domain, meaning that collisions occurring on one port do not affect other ports. This is a major improvement over hubs, which place all connected devices in a single collision domain.However, switches do not isolate broadcast domains by default. Broadcast traffic is forwarded to all ports within the same VLAN. Broadcast domain isolation requires technologies such as VLANs or routers.Since the statement claims that a switch cannot isolate collision domains, which contradicts the HCIA definition of switching behavior, the correct answer is FALSE.
Which of the following statements are false about VLAN technology?
Comprehensive and Detailed Explanation (HCIACloud Computing aligned):VLAN technology is a fundamental topic in HCIACloud Computing, especially for cloud network isolation and segmentation.Option A is false. A trunk link is designed to carry traffic from multiple VLANs using VLAN tags (802.1Q). Untagged traffic typically belongs to a native VLAN, not multiple VLANs.Option B is false. A hybrid interface can be used to connect a switch to a server. Hybrid interfaces support both tagged and untagged VLAN traffic and are commonly used in server and virtualization scenarios.Option C is true. Trunk interfaces are primarily used to connect switch-to-switch links, allowing multiple VLANs to pass between switches.Option D is false. Access interfaces are designed to connect end devices (such as PCs or printers) and carry traffic for only one VLAN, not for switch interconnections.Therefore, the false statements are A, B, and D.
At which layer of the TCP/IP reference model does a router work?
Comprehensive and Detailed Explanation (HCIACloud Computing aligned):The HCIACloud Computing syllabus explains that routers are responsible for inter-network communication and packet forwarding based on IP addresses. In the TCP/IP reference model, this function corresponds to the Network layer.Routers analyze the destination IP address of a packet and use routing tables and routing protocols to determine the best path for forwarding the packet to its destination. This behavior is distinct from switches, which forward frames based on MAC addresses at the data link layer.The Data link layer (A) is associated with switches, the Transport layer (D) handles end-to-end communication (such as TCP and UDP), and the Application layer (C) provides services to applications.Therefore, according to HCIACloud Computing network fundamentals, the correct answer is Network layer.
Which of the following commands are used to view common files on Linux?
Comprehensive and Detailed Explanation (HCIACloud Computing aligned):In the HCIACloud Computing syllabus, Linux command-line operations are part of the Operating System Basics domain. Viewing file contents is one of the most common Linux administration tasks.The less (A) command is used to view file contents page by page. It supports forward and backward scrolling and searching, making it suitable for viewing large files. HCIA materials often recommend less as a preferred file-viewing tool.The more (B) command is an earlier paging command that displays file contents one screen at a time. Although it has fewer features than less, it is still a valid file-viewing command.The cat (D) command is used to display the entire content of a file directly to standard output. It is commonly used for viewing small files or concatenating files.The vim (C) command is primarily a text editor, not a file-viewing command. While it can open and display files, its main purpose is editing rather than viewing, which is how HCIA differentiates it.Therefore, the correct answers are A, B, and D.
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