Computer Networks

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.

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).

WiFi (Wireless Fidelity) is the common name for wireless local area networks. LAN is Local Area Network (wired or wireless), WAN is Wide Area Network, and EPABX is a telephone exchange system. WiFi is the specific technology for wireless networking.

A modem (modulator-demodulator) enables computers to transmit data over telephone lines by converting digital signals to analog and back. CD-ROM drives read optical discs, RAM is memory, and hard drives store data - only the modem provides telephone-line connectivity.

RJ-11 is the standard connector used for telephone lines. It has 4-6 pins and is the small plastic plug found in phone jacks. RJ-45 is larger and used for Ethernet networks, while COM1 is a serial port designation, not a physical connector type.

WAN stands for Wide Area Network, which is a telecommunications network that extends over a large geographical distance. It connects smaller networks like LANs (Local Area Networks) across cities, countries, or continents. Option B correctly identifies this expansion.

WAN (Wide Area Network) connects networks over large geographical distances using dedicated high-speed communication lines. The Internet is the largest WAN. LAN (Local Area Network) covers small areas like a building, URL is a web address, and World Wide Web is a system of interlinked documents accessed via the Internet.