Podcast
Questions and Answers
What type of network is organized around a single individual within a single building?
What type of network is organized around a single individual within a single building?
Which model was created to facilitate data exchange over wide area networks?
Which model was created to facilitate data exchange over wide area networks?
Which event marked the establishment of ARPANET?
Which event marked the establishment of ARPANET?
What significant technology did Paul Baran work on in 1962?
What significant technology did Paul Baran work on in 1962?
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What organization provided funding for the development of ARPANET?
What organization provided funding for the development of ARPANET?
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In what year was the term 'Internet' first assigned to a connected set of networks?
In what year was the term 'Internet' first assigned to a connected set of networks?
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What does the OSI model represent?
What does the OSI model represent?
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Which of the following topologies involves each device being connected directly to two others to form a loop?
Which of the following topologies involves each device being connected directly to two others to form a loop?
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What characterizes a Virtual Private Network (VPN)?
What characterizes a Virtual Private Network (VPN)?
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Which network device is used primarily in a WAN environment?
Which network device is used primarily in a WAN environment?
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Which of the following statements about LANs is correct?
Which of the following statements about LANs is correct?
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When did the number of Internet hosts first exceed 1,000,000?
When did the number of Internet hosts first exceed 1,000,000?
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What was the first graphics-based web browser introduced?
What was the first graphics-based web browser introduced?
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In which decade did the Internet begin to see exponential user growth?
In which decade did the Internet begin to see exponential user growth?
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Which of the following statements correctly describes an Extranet?
Which of the following statements correctly describes an Extranet?
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Study Notes
Types of Networks
- Personal Area Network (PAN): Network organized around a person; typically within a single building.
- Local Area Network (LAN): Computer network limited to a single site, such as an office building.
- Metropolitan Area Network (MAN): Network covering an entire city, college campus, or small region.
- Wide Area Network (WAN): Extensive network spanning large areas like countries or the globe.
Network Models and Standards
- Department of Defense (DoD) network model: Framework enabling data exchange over wide area networks.
- ARPA (Advanced Research Projects Agency): Funded the development of ARPANET, the precursor to the internet.
- International Organization for Standardization (ISO): Develops international standards for various technologies.
- Open Systems Interconnection model (OSI model): Conceptual model standardizing telecommunications and computing communications, independent of internal tech.
Historical Milestones
- 1957: Establishment of ARPA by the DoD.
- 1962: Paul Baran begins work on "packet switching" at RAND.
- 1969: Launch of ARPANET at UCLA, UCSB, U-UTAH, and Stanford.
- 1972: Ray Tomlinson creates the first email program.
- 1973: Introduction of TCP/IP by Bob Kahn and Vint Cerf; ARPANET expands internationally.
- 1982: The term “Internet” officially designated; ISO releases the OSI Model.
- 1990: Transition of ARPANET to the internet.
- 1991: Tim Berners-Lee develops code for the World Wide Web.
- 1997: American Registry for Internet Numbers (ARIN) is established.
- 2001: Internet hosts surpass 110 million.
Network Devices
- End-user Devices: Includes PCs, printers, Macs, file servers, laptops, IBM mainframes.
- Network Devices: Comprise repeaters, bridges, hubs, routers, switches, and network clouds.
Network Topologies
- Bus Topology: Commonly used in Ethernet; all nodes connected to a single cable.
- Ring Topology: Each device connects to two others, forming a closed loop.
- Token Ring: Signals move in one direction around the loop, carried by a token.
- Star Topology: Devices connect directly to a central hub or server.
- Mesh Topology: Can be full or partial; all nodes connect to each other directly.
LANs and WANs
- LANs: Operate within limited geographic areas, enable high-bandwidth access, managed locally. Devices include routers, bridges, hubs, switches.
- WANs: Cover larger areas, operate over serial interfaces with lower speeds. Equipments include routers, communication servers, modems.
Specialized Networks
- Virtual Private Network (VPN): Secures a private network over a public network, allowing data transmission as if connected directly.
- Intranet: Internal network facilitating collaboration and content creation among employees.
- Extranet: Controlled access network for authorized external partners like customers and vendors.
Bandwidth and Media
- Bandwidth: Measurement of data transfer rate over time.
- Coaxial Cable: Bandwidth of 10-100 Mbps with a maximum distance of 185m (or 500m depending on application).
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Description
Test your understanding of different types of computer networks such as PAN, LAN, MAN, and WAN. This quiz covers the fundamental concepts and characteristics of each network type. Perfect for students studying computer networking.
