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Which of the following is used primarily for archiving data?
A Storage Area Network (SAN) is primarily used for data archiving and large-scale storage. SANs provide high-speed, block-level storage for enterprise environments.
Why Not A (PAN): Personal Area Networks are for connecting personal devices like phones and smartwatches.
Why Not B (MAN): Metropolitan Area Networks are for city-wide data communication, not storage.
Why Not D (LAN): Local Area Networks are for general connectivity, not dedicated storage.
Why Not WAN: Wide Area Networks are for connecting geographically dispersed networks, not storage.
CompTIA A+ Exam Reference: Core 1 (220-1201), Section 2.7, network types and purposes.
Which of the following allows for a beam of light to transmit data through a flexible cable?
Single-mode fiber (as well as multi-mode fiber) transmits data using beams of light, allowing for high-speed data transfer over flexible fiber-optic cables.
From CompTIA A+ 220-1101 Official Study Guide, Objective 2.1 -- Networking media:
''Fiber optic cables transmit data using light. Single-mode fiber is used for long-distance, high-speed communication.''
Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 2: Networking Media
CompTIA Exam Objectives 220-1101, Domain 2.1
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Which of the following devices forwards traffic based on MAC addresses?
A network switch operates at Layer 2 (Data Link Layer) of the OSI model and forwards traffic using MAC addresses. CompTIA A+ teaches that switches maintain a MAC address table, learning which devices reside on each port. When a frame arrives, the switch checks the destination MAC address and forwards it only to the appropriate port, reducing unnecessary traffic and improving performance.
Routers, on the other hand, operate at Layer 3 and forward traffic based on IP addresses, not MAC addresses. Firewalls inspect traffic for security policies and operate across multiple OSI layers but do not perform MAC-based forwarding. A gateway is a broad term that generally refers to a device connecting different networks or protocols, typically involving routing, not MAC-based switching.
Thus, the device specifically responsible for forwarding frames based on MAC address lookup is the switch.
A technician receives complaints that a network fileshare is slow and now unavailable. The server is powered on and accessible via RDP. What should the technician check next?
A fileshare becoming slow over time and then failing completely strongly suggests storage subsystem degradation, often due to a failing RAID array. CompTIA A+ explains that slow file access is an early sign of a degraded array, and eventual unavailability indicates the array may have failed or entered a critical state.
Since the technician can still RDP into the server, the OS is functioning, meaning memory is likely not the issue. Network connectivity is sufficient for remote login. Backup integrity does not affect real-time file availability.
Thus, the next step is to check the RAID array status, which directly controls the server's storage performance and availability precisely what CompTIA identifies as the primary point of failure in such scenarios.
A customer reports a problem connecting to network resources. After asking open-ended questions, the technician determines the issue likely exists on the remote server. Which of the following should the technician do next?
After determining the issue is likely on the remote server, the technician should test the theory to confirm the root cause before proceeding.
Why Not A (Document the findings): Documentation comes after confirming the issue.
Why Not C (Gather information): Information gathering is already completed.
Why Not D (Establish a plan of action): This is done after confirming the issue.
CompTIA A+ Exam Reference: Core 2 (220-1102), Section 3.1, troubleshooting methodology.
