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Agriculture informatics > Lecture 6 > Flashcards

Lecture 6 Flashcards

1
Q

What is a computer network?

A

A collection of interconnected devices that share resources and information.

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2
Q

What are examples of devices in a computer network?

A

Computers, servers, printers, routers, switches, and other hardware.

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3
Q

What are some applications of computer networks?

A

Email, file sharing, and internet browsing.

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4
Q

What does PAN stand for in networking?

A

Personal Area Network.

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5
Q

What does LAN stand for in networking?

A

Local Area Network.

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6
Q

What does MAN stand for in networking?

A

Metropolitan Area Network.

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7
Q

What does WAN stand for in networking?

A

Wide Area Network.

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8
Q

What is a PAN (Personal Area Network)?

A

A network covering a small area, such as a room or workspace.

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9
Q

What is a LAN (Local Area Network)?

A

A network covering a limited area like an office, building, or campus.

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10
Q

What is a MAN (Metropolitan Area Network)?

A

A network covering a larger area such as a city or town.

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11
Q

What is a WAN (Wide Area Network)?

A

A network covering large geographical areas, often connecting multiple cities or countries.

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12
Q

What are some real-world examples of PAN?

A

Bluetooth devices, personal hotspots, and smartwatches.

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13
Q

What are some real-world examples of LAN?

A

Office networks, school networks, or home Wi-Fi setups.

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14
Q

What are some real-world examples of MAN?

A

City-wide Wi-Fi networks, cable TV networks in a metropolitan area.

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15
Q

What are some real-world examples of WAN?

A

The internet, multinational corporate networks, and satellite communication networks.

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16
Q

What is a network in computing?

A

A collection of computers and devices connected for communication and data exchange.

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17
Q

What are nodes in a network?

A

Devices connected to a network, such as computers, servers, printers, routers, and switches.

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18
Q

What is a protocol in networking?

A

A set of rules and standards for transmitting data over a network.

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19
Q

What are examples of network protocols?

A

TCP/IP, HTTP, and FTP.

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20
Q

What is network topology?

A

The physical and logical arrangement of nodes in a network.

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21
Q

What are examples of network topologies?

A

Bus, Star, Ring, Mesh, and Tree topologies.

22
Q

What is a bus topology?

A

A topology where each node is connected to a single central cable, and data flows in one direction.

23
Q

What is a ring topology?

A

A topology where nodes are connected in a circular fashion, with bi-directional data flow. A single node failure can disrupt the network.

24
Q

What is a star topology?

A

A topology where nodes are connected to a central hub, offering better performance and reliability.

25
Q

What is a mesh topology?

A

A topology where each node is connected to multiple or all other nodes for maximum reliability.

26
Q

What is a tree topology?

A

A topology that combines elements of star and bus topologies, forming a hierarchy of nodes.

27
Q

What are the advantages of a star topology?

A

Improved performance, reliability, and easy fault detection.

28
Q

What are the disadvantages of a ring topology?

A

A single node failure can bring down the entire network.

29
Q

What are the advantages of a mesh topology?

A

Provides maximum reliability and fault tolerance.

30
Q

What is the main purpose of network topology?

A

To configure nodes and links for optimal network performance and reliability.

31
Q

What are service provider networks?

A

Networks provided by service providers for leased capacity and functionality, such as wireless communications and data carriers.

32
Q

What are examples of service provider networks?

A

Internet Service Providers (ISPs), mobile network operators, and telecom providers.

33
Q

What is an IP address?

A

A unique numerical identifier assigned to devices in a network to enable communication.

34
Q

What is DNS (Domain Name System)?

A

A protocol that translates human-readable domain names into IP addresses.

35
Q

What is the role of DNS in networking?

A

It translates domain names like www.google.com into IP addresses that computers can understand.

36
Q

What is a firewall?

A

A security device that monitors and controls network traffic to protect against unauthorized access and threats.

37
Q

What are the types of firewalls?

A

Hardware firewalls, software firewalls, and cloud-based firewalls.

38
Q

What is transmission mode in networking?

A

The method of transferring data between two devices, also known as communication mode.

39
Q

What is simplex mode?

A

A unidirectional communication mode, like a one-way street. Example: Keyboard to computer.

40
Q

What is half-duplex mode?

A

A communication mode where data can flow in both directions but only one at a time. Example: Walkie-talkies.

41
Q

What is full-duplex mode?

A

A communication mode where data can flow in both directions simultaneously.

42
Q

What are the methods of full-duplex communication?

A
  1. Two separate transmission paths. 2. Dividing link capacity between directions.
43
Q

What is an example of simplex mode in networking?

A

A keyboard sending data to a computer.

44
Q

What is an example of half-duplex mode in networking?

A

Walkie-talkies, where only one person can talk at a time.

45
Q

What is an example of full-duplex mode in networking?

A

A phone call, where both participants can talk and listen simultaneously.

46
Q

What are the benefits of full-duplex communication?

A

Faster data transfer and simultaneous bi-directional communication.

47
Q

What are the advantages of firewalls?

A

They protect networks from unauthorized access, malware, and other security threats.

48
Q

What is the difference between hardware and software firewalls?

A

Hardware firewalls are physical devices, while software firewalls are programs installed on devices.

49
Q

What are the benefits of mesh topology?

A

High reliability, fault tolerance, and better load handling.

50
Q

What are the disadvantages of bus topology?

A

Limited scalability and a single point of failure in the main cable.

51
Q

What are the advantages of tree topology?

A

Supports scalability and hierarchical data flow, making it suitable for large networks.

52
Q

What are some uses of service provider networks?

A

Providing internet access, mobile communication, and leased data lines.

Agriculture informatics (8 decks)

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