Computer Hardware Devices

SCSI defaults to asynchronous data transfer mode, where each byte/word transfer requires handshaking signals (REQ/ACK) before the next can begin. Synchronous transfer is an optional negotiated mode that allows multiple data transfers per handshake cycle, improving throughput. 'Semi-synchronous' is not a standard SCSI transfer mode. The default is asynchronous for maximum compatibility.

The Service Delivery Subsystem resides at the Interconnect Layer, which is the lowest layer in the SCSI Architecture Model. This layer handles the physical and logical interconnection between SCSI devices, including cables, connectors, signaling protocols, and bus arbitration. The Application Layer handles command processing, and the Transport Layer manages data delivery.

Status Code is the immediate indicator returned by a SCSI device to show whether a command succeeded or failed. Sense Data provides additional error details only when requested.

USB stands for Universal Serial Bus, a standard for connecting peripherals to computers. Options A and B incorrectly use 'Super' or 'Bit' instead of 'Serial'. USB supports both data transfer and power delivery, making it a versatile interface for devices like drives, keyboards, and cameras.

A Cathode Ray Tube (CRT) is the display technology used in traditional computer monitors and televisions. It uses electron beams to illuminate phosphors on the screen. CRTs are not found in CPUs, printers, or scanners - those are different types of hardware components.

iSCSI SAN uses standard Ethernet/IP infrastructure, so it requires Gigabit Ethernet switches (or faster like 10GbE). Traditional FC switches are for Fibre Channel SANs, not iSCSI. iSCSI encapsulates SCSI commands in IP packets, which traverse Ethernet switches. The 'IP' in iSCSI indicates the protocol stack.

Multipathing provides path redundancy by creating multiple physical paths between servers and storage, eliminating single points of failure. If one path fails, traffic automatically reroutes through alternate paths. Replication copies data to secondary sites, clustering provides server redundancy, and load balancing distributes traffic - none specifically address path redundancy like multipathing.

NAS (Network Attached Storage) supports multiple file-sharing protocols to provide file-level access to clients over a network. CIFS (Common Internet File System) is used for Windows clients, NFS (Network File System) for Unix/Linux systems, and HTTP for web-based access. All three are valid NAS protocols, making 'All of the above' the correct answer.

FC-SAN and iSCSI-SAN are both SAN architectures but differ in fundamental ways: FC uses Fibre Channel protocol over specialized fiber/copper networks with dedicated FC switches, while iSCSI uses standard TCP/IP over Ethernet. They differ in bandwidth characteristics (FC typically higher), switching technology (FC switches vs Ethernet switches), and the underlying protocol (FCP vs iSCSI/TCP/IP).

BYNET (Banynet) is Teradata's hardware interconnect that enables communication between nodes in the system. AMP (Access Module Processor), PDE (Parallel Database Extensions), and PE (Parsing Engine) are primarily software/logical components that execute on hardware but are not hardware themselves.

Laptop touchpads use capacitive sensing technology, specifically the capacitive shunt method or matrix approach. When a finger touches the pad surface, it disrupts the capacitive field, and the controller detects the change to determine finger position and movement.

Ovi is Nokia's online service brand (Ovi Store, Ovi Maps, etc.), not a mobile processor. Snapdragon is Qualcomm's processor line, ARM Cortex is a processor architecture family used in mobile devices, and A4 is Apple's custom processor. Ovi was Nokia's ecosystem before they transitioned to Windows Phone and later Microsoft services.

Keyboards are input devices that send data TO the computer, while speakers, monitors, and printers all output information FROM the computer. This question tests understanding of the fundamental difference between input and output peripherals. The keyboard is the only device listed that doesn't display or produce information for the user.

A monitor displays output from the computer to the user, making it an output device. Input devices like joysticks, microphones, and keyboards send data TO the computer.