Match each storage drive interface standard with its corresponding physical, protocol, or … — CompTIA A+ (Core 1 & Core 2)

Match each storage drive interface standard with its corresponding physical, protocol, or performance specification.

M.2 NVMe SSDLeverages PCIe bus lanes using a high-efficiency host controller interface, offering throughput speeds well over $3,000\text{ MB/s}$ .
SATA III 2.5-inch SSDUses AHCI controller logic over a legacy serial bus capped at a maximum theoretical transfer rate of $6\text{ Gbps}$ ( $600\text{ MB/s}$ ).
SAS DriveEnterprise storage standard supporting dual-port point-to-point connectivity and full-duplex transmission rates of $12\text{ Gbps}$ or higher.
eSATA DriveExternal interface providing native SATA speeds up to $6\text{ Gbps}$ without protocol conversion overhead, using shielded external cabling.

Answer

M.2 NVMe SSD matches the high-speed PCIe bus interface; SATA III 2.5-inch SSD matches the

6\text{ Gbps}

AHCI serial bus interface; SAS Drive matches the enterprise dual-port

12\text{ Gbps}

interface; and eSATA Drive matches the shielded external native SATA cable standard.

Each storage interface matches its distinct protocol, bus throughput limit, and intended application: M.2 NVMe connects over PCIe for extreme throughput (

3,000+\text{ MB/s}

); SATA III uses AHCI for

6\text{ Gbps}

internal storage; SAS serves enterprise chassis with dual-port

12\text{ Gbps}+

signaling; and eSATA provides

6\text{ Gbps}

native SATA connectivity externally via shielded cables.

Step-by-Step Solution

Identify the protocol and bus topology for M.2 NVMe.

NVMe utilizes PCI Express (PCIe) lanes directly, delivering transfer rates far exceeding SATA limits (

3,000+\text{ MB/s}

NVMe is engineered specifically for non-volatile solid-state memory over PCIe.

Identify the bandwidth limits for SATA III 2.5-inch drives.

SATA III operates using AHCI at a theoretical max speed of

6\text{ Gbps}

(

600\text{ MB/s}

Standard desktop SATA III internal storage interfaces are capped at

6\text{ Gbps}

Analyze enterprise SAS drive characteristics.

SAS provides dual-port connectivity and enterprise reliability with speeds reaching

12\text{ Gbps}

or higher.

SAS controllers accommodate dual-port high-availability server backplanes.

Differentiate external SATA (eSATA) from internal interface standards.

eSATA allows external enclosures to connect directly to the system SATA controller using shielded cables up to

6\text{ Gbps}

eSATA avoids protocol translation penalties inherent in legacy USB-to-SATA adapters.

Key Concept

Storage Interface Standards and Bus Protocols

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