After studying networks and the various ways in which businesses and organizations share valuable information, we will analyze the subculture of hacking, its potential threats and implications for individuals and societies.
We will start by watching the following video on the History of Hacking, produced by Discovery Channel:
We will then read an article on the 10 Famous Hackers and Hacks as well the Biggest Computer Hacks of All Time.
After this, we will access the SlaveHack web site. This site features a completely safe and virtual environment that allows you to learn about hacking by participating in an online game that teaches you some of the techniques that hackers use to break into computers.
Monday, May 22, 2017
Thursday, May 11, 2017
Network Design
We will learn more about switches, hubs and routers by watching the following video:
The objective of today's assignment is to solve a real life problem and design a network.
We will first work together on the following example:
- An airline company has a counter and an office at the airport. At the counter, five employees use their computers for checking in passengers and printing out boarding passes on a special printer, and they are connected to an office at the same airport, where administrative employees work on four computers and share a printer. All the transactions at the airport are connected to the airline’s headquarters downtown, where a sales office comprises six computers and a printer, and an administrative office features four other computers and two printers. All the computers at the headquarters location use a single colour printer for travel brochures.
Using the knowledge that you acquired over the past lessons, for each of the two cases below you should:
a) Draw a diagram that depicts the schematics of the network, including images of the various components (hubs, switches, etc.) that you can easily obtain from the Internet.
b) Write a rationale for the design decisions that were made, explaining the reasons for them in each case.
Bear in mind, when making your design decisions, the costs of all components involved, remember that routers are more expensive than switches and that these are more expensive than hubs. Also include, whenever necessary, proxy servers and firewalls.
1) A school has two small campuses that operate at different physical locations, 10 km apart. The North campus has a computer lab with 9 workstations and a printer that are connected via a network, and 4 administrative computers and two printers that are networked to each other. A file server and colour printer are accessed by all computers in this campus, which are also connected to the Internet by means of a dedicated cablemodem. The South campus has two computer labs with 6 and 8 computers respectively, plus 5 other computers that are used for teaching and administrative purposes. There is one file server and network printer that must be accessed by all computers in the network. The North Campus will access the Internet via a dedicated cablemodem. Both campuses must be linked.
2) A multinational company has branches in Argentina and the US. The Argentina branch has 8 networked computers that are used to handle customer requests and post-sale service, whereas the US office deals with sales and production through 12 computers. Each branch has two network printers and a file server, and they must be connected to each other. Design a network that satisfies the requirements and explain which hardware and/or software solutions you need to adopt.
The objective of today's assignment is to solve a real life problem and design a network.
We will first work together on the following example:
- An airline company has a counter and an office at the airport. At the counter, five employees use their computers for checking in passengers and printing out boarding passes on a special printer, and they are connected to an office at the same airport, where administrative employees work on four computers and share a printer. All the transactions at the airport are connected to the airline’s headquarters downtown, where a sales office comprises six computers and a printer, and an administrative office features four other computers and two printers. All the computers at the headquarters location use a single colour printer for travel brochures.
Using the knowledge that you acquired over the past lessons, for each of the two cases below you should:
a) Draw a diagram that depicts the schematics of the network, including images of the various components (hubs, switches, etc.) that you can easily obtain from the Internet.
b) Write a rationale for the design decisions that were made, explaining the reasons for them in each case.
Bear in mind, when making your design decisions, the costs of all components involved, remember that routers are more expensive than switches and that these are more expensive than hubs. Also include, whenever necessary, proxy servers and firewalls.
1) A school has two small campuses that operate at different physical locations, 10 km apart. The North campus has a computer lab with 9 workstations and a printer that are connected via a network, and 4 administrative computers and two printers that are networked to each other. A file server and colour printer are accessed by all computers in this campus, which are also connected to the Internet by means of a dedicated cablemodem. The South campus has two computer labs with 6 and 8 computers respectively, plus 5 other computers that are used for teaching and administrative purposes. There is one file server and network printer that must be accessed by all computers in the network. The North Campus will access the Internet via a dedicated cablemodem. Both campuses must be linked.
2) A multinational company has branches in Argentina and the US. The Argentina branch has 8 networked computers that are used to handle customer requests and post-sale service, whereas the US office deals with sales and production through 12 computers. Each branch has two network printers and a file server, and they must be connected to each other. Design a network that satisfies the requirements and explain which hardware and/or software solutions you need to adopt.
More on Networks
We will attempt to consolidate our learning on networks by browsing the Networks Basic Interactive Tutorial to further understand some of the basics about networking. This should take no longer than 20 minutes.
After that, you should be able to correctly answer all 11 questions of the Networks Basics Overview Quiz, which should not take you more than 5 minutes.
As a reference, you can browse the Educator's Guide to School Networks, which constitutes a good tutorial for network basics.
After that, you can try designing a network utilizing the following Interactive Network Design Simulator.
After that, you should be able to correctly answer all 11 questions of the Networks Basics Overview Quiz, which should not take you more than 5 minutes.
As a reference, you can browse the Educator's Guide to School Networks, which constitutes a good tutorial for network basics.
After that, you can try designing a network utilizing the following Interactive Network Design Simulator.
Monday, May 8, 2017
Networks
The next topic that we will be dealing with is networks. We will be analyzing the fundamentals of networks, different topologies and other technical concepts as a first step towards discussing the implications of networks on society and individuals.
We will start, as an introduction, by watching the following animation that depicts graphically how Internet works:
Then we will cover the basics and fundamentals of Networking through How Stuff Works.
How Ethernet Works
Another good reference is the Ethernet Tutorial at Lantronix.
We will start, as an introduction, by watching the following animation that depicts graphically how Internet works:
Then we will cover the basics and fundamentals of Networking through How Stuff Works.
How Ethernet Works
Another good reference is the Ethernet Tutorial at Lantronix.
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