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| Section | Weight | Objectives |
|---|---|---|
| Virtualization and Cloud Computing | 11% | - Cloud service models & deployment types - Virtual & cloud security - Virtualization concepts & hypervisors - Cloud infrastructure & resource management |
| Hardware and Network Troubleshooting | 28% | - Network issues & resolution - Component failure diagnosis & repair - Troubleshooting methodology - Hardware problems & solutions |
| Networking | 23% | - IP addressing & protocols - Network connectivity & troubleshooting - Network types, topologies & cables - Wireless networking standards & security - Network devices & configuration |
| Hardware | 25% | - Hardware maintenance & upgrades - Custom PC builds & specialized hardware - PC components, installation & configuration - Power supply & cooling systems - Peripherals & storage devices |
| Mobile Devices | 13% | - Synchronization & data management - Hardware components & replacement - Network connectivity & configuration - Mobile device security & troubleshooting |
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NEW QUESTION # 129
Which of the following characteristics differentiates DDR4 RAM from DDR3 RAM?
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract (Aligned With CompTIA A+ 220-1201 Study Guide) CompTIA A+ Core 1 memory standards describe the differences between DDR generations. One of the key improvements in DDR4 over DDR3 is reduced operating voltage, which allows lower power consumption and increased efficiency.
DDR3 operates at 1.5V (some variants 1.35V)
DDR4 operates at 1.2V (some variants 1.05V LPDDR4)
This lower voltage is a recognized defining characteristic separating DDR4 from DDR3.
Other differences such as increased speed and internal bank structure exist, but the question specifically asks for the characteristic that differentiates DDR4 from DDR3 - and voltage is the correct, primary distinction used in CompTIA A+ materials.
Why the other options are incorrect
B . Higher latency
DDR4 generally has slightly higher CAS latency numbers, but due to increased speed, real latency is similar. This is not the standard differentiator referenced by CompTIA.
C . Increased DIMM width
DDR3 and DDR4 standard DIMMs both have a 64-bit data width.
D . Single-sided modules
Both DDR3 and DDR4 can be single- or double-sided; not a differentiating factor.
NEW QUESTION # 130
Some users are unable to access their workstations. An administrator runs ipconfigon one of the workstations and sees the following:
IPv4 address: 192.168.1.27
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.1
The administrator runs the following command and receives this output:
C:\Users\User> ping gateway
Pinging gateway (192.168.1.1) with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Which of the following is the source of issue?
Answer: D
Explanation:
The workstation has a valid IPv4 address, subnet mask, and default gateway on the same subnet, but it cannot reach the default gateway because ping requests to 192.168.1.1 time out.
This indicates the gateway device (router) is unreachable or not responding, which would prevent access to network resources beyond the local host.
NEW QUESTION # 131
Which of the following combinations of specifications and frequencies delivers the greatest speed and compatibility for lot devices?
Answer: D
Explanation:
802.11n combined with the 2.4GHz frequency offers the greatest compatibility for IoT devices.
802.11n: Operates on both 2.4GHz and 5GHz bands, offering backward compatibility with older standards like 802.11b/g.
2.4GHz: Has longer range and better penetration through walls, making it ideal for IoT devices that are spread across large areas.
NEW QUESTION # 132
Which of the following is commonly affected by high latency?
Answer: A
Explanation:
CompTIA A+ emphasizes that satellite internet connections inherently suffer from extremely high latency because the data must travel from the user's antenna to satellites orbiting tens of thousands of miles above Earth and back. Although satellite systems offer broad geographic coverage, this long travel distance introduces noticeable delays often 500ms or more.
Fiber, cable, and DSL operate through terrestrial wiring and have far lower latency due to short signal paths. Fiber, in particular, is the fastest and lowest-latency connection type.
Satellite delay significantly impacts VoIP calls, video conferencing, online gaming, and real-time applications. The A+ exam specifically notes latency as a major performance characteristic of satellite service, distinguishing it from other broadband technologies.
NEW QUESTION # 133
A help desk technician investigates a laser printer issue. Smudges are appearing on the printed pages, but they are not present on the document that was sent to the printer. Which of the following should the technician do first to diagnose the issue?
Answer: A
Explanation:
Because the smudges are not in the original document, the problem is almost certainly occurring inside the printer's imaging process, not in software, drivers, or the file being printed. With laser printers, smudges commonly result from issues in the imaging components such as the drum/photoconductor, the toner delivery, or the fuser stage that bonds toner to the page. The best first diagnostic step from the options given is to inspect the printer drum, because damage, contamination, or wear on the drum can cause repeating marks, streaks, or smudges as the drum rotates and transfers toner to paper. Visual inspection can quickly reveal toner buildup, scratches, or a failing drum surface, and it helps confirm whether the issue matches a drum-related symptom before replacing consumables.
Updating firmware is unlikely to fix a physical smudging problem. Switching paper can help if paper is damp or incompatible, but it is less likely when the symptom is consistent and the smudge pattern points to the imaging path. Replacing toner may resolve it, but that is a fix rather than the most targeted first diagnostic action compared to inspecting the drum.
NEW QUESTION # 134
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