Computer Networks

ISDN (Integrated Services Digital Network), DSL (Digital Subscriber Line), and Modem are all technologies or devices used to connect to the internet. CPU (Central Processing Unit) is the computer's processor component, not a method of accessing the web. The CPU processes data but doesn't provide network connectivity itself.

ARPANET (Advanced Research Projects Agency Network), funded by the US Department of Defense, was the first wide-area packet-switching network. Established in 1969, it pioneered TCP/IP protocols and evolved into the modern Internet. UCLA was one of the first nodes (not the network itself), and DARPA was the funding agency.

ARPANET (Advanced Research Projects Agency Network), funded by the US Department of Defense, was the first wide-area packet-switching network. Established in 1969, it pioneered TCP/IP protocols and evolved into the modern Internet. UCLA was one of the first nodes (not the network itself), and DARPA was the funding agency.

The Internet is the quintessential example of connectivity - a global network connecting billions of devices, systems, and people worldwide. Connectivity refers to the capability to link and exchange data between different computing systems, which is exactly what the Internet enables. Floppy disks and power cards are storage/external devices, while 'data' itself is not a form of connectivity.

The network server is the most powerful and central computer in a typical network configuration. Servers manage network resources, handle authentication, store shared data, run applications for clients, and coordinate all network operations. Clients (workstations, desktops) are typically less powerful as they rely on the server for resources and services. The term 'Network station' is not standard terminology.

The network server is the most powerful and central computer in a typical network configuration. Servers manage network resources, handle authentication, store shared data, run applications for clients, and coordinate all network operations. Clients (workstations, desktops) are typically less powerful as they rely on the server for resources and services. The term 'Network station' is not standard terminology. This is a duplicate of question 13646.

Connectivity refers to the ability to link and communicate between computer systems. The Internet is the global network that connects millions of devices, enabling communication and data exchange. Floppy disks and power cards are hardware components, while data is the content being transmitted.

Connectivity refers to the ability to link and communicate between computer systems. The Internet is the global network that connects millions of devices, enabling communication and data exchange. Floppy disks and power cards are hardware components, while data is the content being transmitted.

The network server is the most powerful and important computer in a typical network because it manages resources, provides services to clients, and controls network operations. Clients request services, while servers provide them. The server has more processing power, storage, and specialized network software.

The network server is the most powerful and important computer in a typical network because it manages resources, provides services to clients, and controls network operations. Clients request services, while servers provide them. The server has more processing power, storage, and specialized network software.

The Internet is the correct example of connectivity as it connects millions of computers and devices worldwide, enabling communication and data exchange. A floppy disk is storage media, a power card is a hardware component, and data is the content being transmitted - none represent connectivity itself.

WiFi (Wireless Fidelity) is the common term for wireless computer networks that use radio waves instead of physical cables. LAN and WAN refer to network scope (local/wide area) but don't specify wireless technology. EPABX is a telephone exchange system, not a computer network type.

No industrial network is universally the best - each has strengths suited to different applications. Profibus offers robust communication, DeviceNet provides efficient manufacturing integration, and Fieldbus has specific advantages. The choice depends on speed, noise immunity, cost, and compatibility requirements.

The IEC 61158 Fieldbus standard (IEC 61158) currently includes 8 different communication network types. These include various industrial communication protocols like FOUNDATION Fieldbus, Profibus, and others that were standardized under this international standard. Options A (1), B (3), and D (15) are incorrect as they don't match the actual number of standardized networks.

A modem (modulator-demodulator) converts digital signals (bits and bytes) into analog signals for transmission over telephone lines and performs the reverse conversion when receiving. Sensors detect physical quantities, and transistors are electronic components.