Computer Networks

LAN (Local Area Network) is a small network confined to a single site like a home, office, or building. DSL is an internet connection technology, RAM is computer memory, and USB is a peripheral connection standard.

LAN stands for Local Area Network - a computer network that connects devices within a limited area like a home, office, or building. Option C is the correct technical definition.

VPN stands for Virtual Private Network, which extends a private network across a public network and enables users to send and receive data across shared or public networks as if their devices were directly connected to the private network. Options B, C, and D incorrectly use 'Voice' instead of 'Virtual' - VPN is not about voice transmission (that would be VoIP).

IS-41 is a standard for CDMA and TDMA networks. GSM uses different standards (MAP). This question tests knowledge of which network technologies share the IS-41 interoperability standard.

The maximum message size in SMS depends on the network technology and implementation. Different networks have different constraints (e.g., 160 characters for GSM, varies for others). It is not a fixed value across all technologies.

An SMS gateway acts as a bridge between different networks and media, converting SMS messages to mobile network traffic and vice versa. It enables sending/receiving SMS without a mobile phone - through email, web applications, or APIs. VMS is voicemail, EMS is enhanced messaging (largely obsolete), and 'Fast SMS' is not a standard term.

A Direct-To-Mobile gateway has a built-in GSM modem and SIM card, allowing it to send SMS directly to mobile handsets without going through a carrier's SMSC. This is useful for bulk messaging. Direct-To-SMSC gateways connect to the carrier's SMSC via TCP/IP or other protocols.

Network shared drives require authentication and authorization - only users with proper permissions can access them. This is a fundamental security principle. Not everyone on the network automatically has access; access is granted based on user credentials and permissions configured by the network administrator.

Network security protocols ensure that only users with the correct permissions and network connectivity can access shared hardware. While everyone on the network might physically see it, access is restricted to authorized accounts to manage print queues and security.

An Intranet is a private network accessible only to an organization's staff. Its primary purpose is to allow employees to securely share information, collaborate, and communicate within a defined group of users.

LAN stands for Local Area Network, which connects computers within a small, single-site geographic area. DSL is an internet connection type, RAM is computer memory, and USB is a connection interface.

Anti-collision is the technique that allows RFID readers to simultaneously read multiple tags. It prevents signal interference when multiple tags respond at once, enabling batch reading. The other terms (agility, multipath, polarizations) relate to RF communications but aren't the correct term for this capability.

NFC devices operate in three main modes: Reader/Writer mode (reading tags), Card Emulation mode (acting like a smart card), and Peer-to-Peer mode (direct device-to-device communication). Pairing Mode and Seamless Data Transfer Mode are not standard NFC operating modes defined in the specifications.

SAN stands for Storage Area Network. Although the correct option contains a minor typographical error ('Stoarge' instead of 'Storage'), it is clearly the intended correct answer among the choices.