Answer: A computer network is an interconnected system of autonomous computers that allows them to share resources and exchange information. The MLI-004 course material emphasizes that these networks are built upon various essential components, each playing a crucial role in enabling seamless communication and data transfer. These components can broadly be categorized into end devices, interconnecting devices, transmission media, and network software. **1. End Devices (Hosts)** End devices are the ul...

Answer: The Open Systems Interconnection (OSI) model, developed by the International Organization for Standardization (ISO), provides a standardized, seven-layer framework for understanding and implementing network communication. It's a conceptual model that describes how different network components cooperate to transmit data from one application to another across a network. Each layer performs specific functions, operating independently but relying on the services of the layer below it and providing s...

Answer: A search engine is a sophisticated software system designed to systematically search for information on the World Wide Web. It functions as a digital librarian, cataloging vast amounts of online content to retrieve and present the most relevant resources in response to a user's query. These systems are crucial gateways to accessing the immense and ever-growing information landscape of the internet, making information discovery efficient and accessible. Search engines operate by maintaining an u...

Answer: ISDN, or Integrated Services Digital Network, represents a set of communication standards designed to integrate voice and data services over traditional digital telephone lines. Its fundamental purpose was to evolve beyond the analog Public Switched Telephone Network (PSTN) by offering end-to-end digital connectivity. This architecture allows for the simultaneous transmission of various types of information, including voice, video, and data, across a unified network connection. ISDN brought sig...

Answer: Inter-library Loan (ILL) standards are crucial communication protocols that enable libraries to borrow and lend materials to each other efficiently, thereby expanding resource access for their users. These standards ensure interoperability between diverse library systems, streamlining the entire ILL process from request initiation to fulfillment. Without standardized protocols, libraries using different software platforms or cataloging systems would face significant challenges in exchanging req...

Answer: A Virtual Private Network (VPN) plays a crucial role in modern libraries by extending a private network securely over a public network, such as the internet. It establishes an encrypted connection, often referred to as a ‘tunnel,’ ensuring secure and confidential data transmission between a user and the library's internal network. One of the primary applications of VPNs in libraries, as discussed in MLI-004, Unit Z, is to facilitate remote access to licensed electronic resources. Libraries subs...

Answer: Computer viruses are a major threat in networking and Internet technology, fundamentally defined as malicious software programs designed to replicate themselves and spread from one computer to another without the user's knowledge or permission. These programs typically attach themselves to legitimate programs or documents and are activated when the host file is executed, often leading to disruptive or damaging consequences. As explained in MLI-004, viruses are characterized by their self-repli...

Answer: Electronic document delivery service has become crucial in the digital age, enabling rapid and efficient transfer of information globally. These services leverage networking and Internet technologies to transmit digital content, ranging from text documents to multimedia files, thereby overcoming geographical and temporal barriers. The primary objective is to provide users with timely access to required information in an electronic format. One of the most fundamental methods is **Email Attachmen...

Answer: Resource sharing is a fundamental concept in networking, allowing multiple users within a network to access and utilize common resources efficiently. This capability significantly enhances productivity, reduces costs, and simplifies management by centralizing valuable assets. Networks are primarily established to facilitate this sharing across different workstations and servers. One major area of resource sharing involves **hardware resources**. Expensive peripheral devices such as printers, sc...