Computer Networks

A server cluster is a group of servers that work together to distribute workload and provide high availability. If one server fails, others in the cluster can take over its functions, ensuring continuous service.

A LAN (Local Area Network) connects computers in a limited area like an office or building. Its primary purpose is enabling connected devices to share resources such as files, printers, scanners, and internet access.

Multiplexing is a technique that combines multiple input signals from different sources into one output signal and transmits them over a shared high-speed communication channel. This maximizes bandwidth utilization. Simplex and duplex modes describe transmission directions, not signal combining.

In two-tier architecture, the client handles presentation and business logic (fat client), while the server manages data. This contrasts with three-tier where business logic moves to a middle tier. 'Tire' is a typo for 'tier'.

Broadcast and point-to-point are standard transmission technologies. Narrowcast linking is not a recognized standard transmission technology term; the correct terminology is narrowcast (similar to broadcast but targeted to a specific audience), not narrowcast linking.

Client-server computing is particularly useful in networked multimedia applications where centralized servers manage resources and clients handle presentation. While it can be used in other contexts, network multimedia is a primary application domain.

Gateways enable networks to access resources on other systems, including mainframes. Routers strengthen signals, repeaters establish connections, and bridges optimize paths - but these functions are misstated. Gateways correctly provide cross-system resource access.

A remote concentrator collects data from multiple slow-speed peripheral devices and transmits it to central locations or different sites. This aggregates low-speed data streams for efficient transmission over communication channels.

Automatic dial-up allows modems to connect automatically when needed. Attenuation and amplification manage signal strength during transmission. Dynamic equalization adjusts for varying line conditions. All three are desirable features for effective modem operation.

All the components are included in vSphere data centre topology.

Multiuser systems are designed to support multiple users simultaneously, often through terminals or network connections. Single user systems serve only one user at a time.

A pipe is a Unix/Linux inter-process communication mechanism that allows the output of one program to become the input to another. Channels and tapes are storage or transmission media, not IPC facilities.

A teleconference is a telephone meeting among two or more participants involving technology more sophisticated than a simple two-way phone connection.

One way communication model:

Sender—— Message —— Receiver

This is the correct option. T-switch allows devices on one network to communicate with devices on another network. T-switch rearranges the connections between computing equipment.