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Questions and Answers

What was the purpose of the Gopher tool developed by Paul Linder and Mark McCahill?

To enable secure communication on remote computers

To retrieve specific data from multiple locations (correct)

To facilitate FTP server authentication

To create a web browser for public use

What is the common username used to access an FTP server with anonymous login?

user123

ftp_user

anonymous (correct)

guest

Which of the following is NOT one of the basic objectives of FTP?

To enable high-speed video streaming (correct)

To transfer data reliably and efficiently

To promote sharing of computer programs and files

To shield users from variations in file storage systems

What is the first step in initiating an FTP session?

Typing 'ftp' on the system's command line Signup and view all the answers

How does TELNET enable users to access remote computers?

By sending commands through the local Internet Service Provider Signup and view all the answers

Which of the following actions can be performed in an FTP session?

Setting the transfer mode for file downloads Signup and view all the answers

What does the remote site do after a user provides their Login Name and Password in an FTP session?

Verify the Login Name and Password Signup and view all the answers

What is a crucial aspect of protocols in computer networks?

They enable different computers from different vendors to communicate effectively. Signup and view all the answers

Which of the following accurately describes a node in a computer network?

Any device connected to the network that can send or receive data. Signup and view all the answers

Which property of computer networks primarily enhances communication?

Facilitating email, instant messaging, and conferencing. Signup and view all the answers

What aspect of the Internet serves billions of users?

The interlinked infrastructure of private and public networks. Signup and view all the answers

Why is distributed computing significant in network environments?

It allows tasks to utilize computing resources across multiple devices. Signup and view all the answers

Which of the following is NOT a property of computer networks?

Limiting data access to only physical storage devices. Signup and view all the answers

What is the primary function of a communications protocol within a network?

To establish rules for efficiently exchanging information over the network. Signup and view all the answers

What challenge is often associated with computer networks?

Potential security vulnerabilities in shared environments. Signup and view all the answers

Which type of network connects each node to an arbitrary number of neighbors, ensuring at least one path exists between any two nodes?

Mesh Network Signup and view all the answers

What was the primary purpose of the ARPANET when it was developed?

To develop a secure network resilient to nuclear attacks Signup and view all the answers

Which protocol was used by ARPANET to enable communication between computers?

National Control Protocol (NCP) Signup and view all the answers

In which year was the first email sent over ARPANET?

1972 Signup and view all the answers

What was a key feature of the ARPANET's design that contributed to its growth?

Decentralized characteristics Signup and view all the answers

Which network topology involves each node being connected to a central hub?

Star Network Signup and view all the answers

How did researchers primarily contribute to network development during the 1970s?

By developing protocols for controlling networks and moving messages Signup and view all the answers

Which of the following describes a fully connected network?

Each node is connected to every other node in the network Signup and view all the answers

Which of the following best describes a ring network?

Nodes are connected in a closed loop, each with two neighbors Signup and view all the answers

Which of the following statements about bus networks is true?

All nodes share a common communication medium Signup and view all the answers

What primary characteristic distinguishes a wide area network (WAN) from other types of networks?

It covers large geographic areas and utilizes multiple types of media. Signup and view all the answers

Which statement about a virtual private network (VPN) is true?

VPNs can create a secure communication channel over an unsecured network. Signup and view all the answers

How does network topology relate to the physical layout of a network?

Network topology defines logical interconnections regardless of physical arrangement. Signup and view all the answers

What is the primary function of an enterprise private network?

To connect various company locations for sharing computer resources. Signup and view all the answers

Which of the following best describes the role of common carriers in WANs?

They provide transmission facilities for WAN communication. Signup and view all the answers

What type of network function do tunneling protocols provide in a VPN?

They encapsulate data for transmission through a larger network. Signup and view all the answers

Which type of network is characterized by the use of both digital and analog signals?

Any computer network Signup and view all the answers

In a star network topology, how are the nodes connected?

Each node is connected directly to a central hub or switch. Signup and view all the answers

What is one of the main applications of a virtual private network (VPN)?

To ensure secure communications through the public Internet. Signup and view all the answers

What does it mean when a network is described as having a logical topology?

It indicates how devices perceive their connections and relations. Signup and view all the answers

What is a primary characteristic of an intranet?

It is controlled by a single administrative entity. Signup and view all the answers

Which of the following best describes an extranet?

A network providing controlled access for external partners. Signup and view all the answers

What is a common benefit of utilizing load sharing in a network?

It helps equalize the load between program and data transmission. Signup and view all the answers

Which scenario would NOT utilize data sharing in a network?

Sharing a small amount of data within a single device. Signup and view all the answers

What is a potential drawback of establishing a complex computer network?

High costs and complicated setup processes. Signup and view all the answers

Which of the following best describes a Local Area Network (LAN)?

A network linking devices within a limited geographical area. Signup and view all the answers

Which one is NOT typically a function of a network?

Personal data encryption for individual users. Signup and view all the answers

What is often a primary motivation for setting up a program sharing service in a network?

To allow multiple users to access the same applications. Signup and view all the answers

Which of the following describes the purpose of a denial of service attack?

To prevent access to network resources. Signup and view all the answers

Which statement accurately reflects the impact of computer viruses or worms on a network?

They may disrupt normal access to the network. Signup and view all the answers

Study Notes

Internet Overview

The Internet is a global network of interconnected computer networks.
It uses the TCP/IP protocol suite (though not all applications).
It connects millions of private, public, academic, business, and government networks.
It supports various communication and information services (e.g., web, email).

Computer Networks

A computer network connects two or more computers to share resources/information.
Each device on a network is a node with a unique address.
Protocols (communication rules) are needed for different computers to understand each other.
Networks facilitate communication (e.g., email, messaging), resource sharing (files, printers), and distributed computing.
Networks can be insecure and difficult to set up, especially large, complex ones.

Network Types

Local Area Network (LAN): Connects devices in a limited geographic area (e.g., home, office).
Wide Area Network (WAN): Connects devices over a large geographic area (e.g., across regions).
Intranet: A network within an organization, using Internet technologies, but only accessed by authorized users.
Extranet: An extended intranet that allows controlled access to external users (e.g., partners, vendors).
Enterprise Private Network: A network for connecting an organization's various sites.
Virtual Private Network (VPN): A network connection over a public network (e.g., internet), providing security.

Network Topology

Network topology refers to the arrangement and connections of devices in a network (logical).
Topology can be different representations of actual physical wiring.
Common topologies include bus, star, ring, mesh, and fully connected.

History of Internet

ARPANET (Advanced Research Projects Agency Network) was the precursor to the Internet.
It was developed to withstand a nuclear attack.
ARPANET's decentralized design is key to its growth.
Protocol standardization (e.g., TCP/IP) was crucial to interoperability.

Internet Protocols

Protocols like TCP/IP, HTTP, HTTPS, FTP govern data transfer on the internet.
TCP/IP helps break down messages into packets for transmission and re-assembly.
HTTP is the way websites communicate with web browsers.
FTP is a standard protocol for transferring files over a network

Internet Services

Search engines help users find information on the internet.
The World Wide Web (WWW), or simply the Web, is a collection of interconnected web pages.
HyperText Transfer Protocol (HTTP), and associated technologies, are the foundation of the WWW.

Web Concepts

Web pages are the fundamental units of the web.
Websites are collections of web pages.
Uniform Resource Locators (URLs) specify the location and access method for web resources.

Web Design

Various technologies and languages (e.g., HTML, CSS, JavaScript) are used to build websites.
Client/server architecture is central to web functionality.
Web servers and clients communicate via protocols to exchange information.

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Description

This quiz covers the fundamentals of computer networks, including the Internet's structure, types of networks, and the protocols that govern their interactions. Understand key concepts such as Local Area Networks (LAN) and Wide Area Networks (WAN), as well as the challenges in network security and setup. Test your knowledge on how these systems facilitate communication and resource sharing.