Computer Networks

A server is a computer that shares resources (files, printers, applications, services) with other computers on the network. Clients are computers that request and use these resources. Mainframes are large centralized computers, while web servers specifically serve web content, making Server the most accurate general answer.

Network cables operate at the Physical layer (Layer 1) of the OSI model, which deals with the actual physical connection and transmission of raw bits over the medium. The Physical layer defines specifications for cables, connectors, and signaling. Higher layers deal with logical rather than physical aspects.

ISDN (Integrated Services Digital Network) is an example of circuit-switched networking, where a dedicated communication path is established for the duration of the connection. Circuit switching reserves bandwidth throughout the session, unlike packet switching which breaks data into packets and shares network resources dynamically.

Shared Resources is the correct answer. LANs allow multiple devices to share resources like printers, files, and internet connections, which is a primary advantage. LANs themselves do not inherently provide virus protection, data security, or prevent computer misuse - those require additional security measures.

A Modem (modulator-demodulator) converts digital data to analog signals for transmission over telephone lines, and converts received analog signals back to digital. FAX is for document transmission, Scanner for digitizing physical documents, and Hub is for local network connections - none enable remote data communication.

ARPANET was the first wide-area packet-switching network and the direct predecessor to the modern Internet. It was developed by DARPA in the late 1960s, whereas Ethernet (a local networking technology) came later, and the Internet evolved from ARPANET's infrastructure.

GSM stands for Global System for Mobile Communications, which is the standard for mobile networks used by most carriers worldwide including Airtel and BSNL in India. It uses SIM cards for subscriber identification and enables features like SMS and data services. GSM is the most widely used mobile standard globally.

'Software powers the Internet' was Oracle's slogan, reflecting the company's position as a major provider of database and enterprise software that forms the backbone of internet infrastructure. This messaging emphasized Oracle's role in enabling the digital economy and web-based businesses. The slogan positioned Oracle as essential technology provider rather than just a software company.

CDMA stands for Code Division Multiple Access, a channel access method used by various radio communication technologies. Option B is correct. Options A, C, and D are incorrect - 'Centre Division' and 'Dividor' are not the correct terms.

Optiplex Multiscribe is not a type of internet connection. Optiplex is a line of Dell desktop computers, and 'Multiscribe' is not a recognized networking term. Broadband, WiFi, and Dial-up Modem are all legitimate methods of connecting to the internet.

LAN (Local Area Network), MAN (Metropolitan Area Network), and WAN (Wide Area Network) are the three standard geographic classifications of computer networks. DAN is not a real network type - it's a made-up option designed to test knowledge of actual network classifications.

To connect to the internet, you need a browser (software), internet connection (service), and network adapter (hardware). A LAN cable is just one possible physical medium - you can connect via Wi-Fi, fiber, mobile data, or other means without needing a LAN cable specifically.

A Virtual Private Network (VPN) creates a secure, encrypted connection over a public network like the Internet. All data passing through a VPN is scrambled, making it unreadable to interceptors, which provides privacy and security for sensitive information transmitted online.

Bandwidth in networking refers to the maximum data transfer rate of a communication channel - the amount of data that can be transmitted per unit time. While technically related to frequency range, bandwidth is commonly used to describe data throughput capacity (like Mbps or Gbps).