Today we watched a video about bat dogs. The video explained that a baseball team has dogs get the bats after a player hits. The first dog to do this was a golden retriever named Chase. After that his son, Derby, got the bats and then Derby's son, Rookie. The team and the fans love the dogs, which shows how much of a success the idea was for the team. The video said that Derby really loved his dad so when Chase died of cancer, that was devastating. They got Derby a new companion though, so he moved on and went back to getting the bats.
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For bellwork today, we watched a video about images and what they are made up of and how they are stored. Pictures are made up of pixels. Pixels are small boxes that have different colors in them that, when put together create and entire image. The different colors in the pixels are red, green and blue, or RGB. Everything is on a computer, phone, etc. is made up of different levels of red, green and blue. The three colors can have a different brightness and a different amount, so that it can make up many colors. It was interesting to me to learn that everything you see on a screen is made up of red, green and blue.
In the video we watched in class today, we learned about cybersecurity and crime online. The video talked about viruses, DDoS, and phishing.
The video explained that phishing is spam mail that is sent, and if the person believes it is real and enters their personal information, a hacker can then see and use their information. A virus can do many things and be installed multiple ways. A computer can get a virus by installing a program that has a virus, or if the security is weak, the hacker can install the virus without getting permission. A virus has access to everything on the computer and can delete, steal or do have remote control of the computer. For example, a virus can be used to create an attack called a DDoS. In this attack, all of the computers with a virus can go to and overwhelm a website with the requests. This video explained how computer encrypt messages to keep them private and safe. The video said that one of the first methods of encryption was Caesar's Cipher, which used a "key" or a certain number to decode. The number would tell the receiver how many letters forward in the alphabet to go to translate the letter. This is not used for computers because it would take only 26 tries to decode at most. The computer could do this in seconds, therefore that method is not secure.
The method that is used now is similar to to Caesar's Cipher, but instead of changing each letter by the same number, each letter has a different number. The method of encryption becomes more and more complex as computers become faster to make sure that messages are secure. Today in class we watched a video about how browsing websites works. The video explained HTTP, HTML, and the security of websites. It explained that if a website is secure, hackers have to go through another layer to access private information. HTTP is the "language" used between computers and servers. They use this for when you try to access a website. The computer sends a get request and the server finds the website for your computer to use.
This video explained what packets, routing and reliability are. It explained that all information sent on the internet is sent in packets. One thing can take more than one packet depending on the size. Routers make sure that packets travel along the cheapest route available. Cheapest does not refer to money, but the the quickest and most efficient route. It was surprising to see that the same thing can take more than one packet and be reassembled at its destination.
We tracked our media consumption for an entire day and recorded the results. The visuals showed that I spent a lot of time using each of the categories we used. Compared to the infographic we looked at in class, I spent a larger percentage on communication. I also spent a much smaller percentage on interactive consumption. I spent a similar amount of time on creation and a little less on passive consumption. I was surprised by how much time I spent online, especially when I added in passive consumption and the time I used it for school.
Today in class we watched a video about being a digital citizen. Digital citizenship is different than being a citizen of a country. Being a digital citizen is mostly about what you do and how you act online. It is important because being a good digital citizen involves being smart and considerate. This is important because it helps make sure people think before they make a mistake online or say something mean to someone else online.
The video we watched today was called "The Internet: IP Addresses and DNS". This video explained what IP Addresses, Domain Name Servers, and Protocols are and how they work together. When you type in a Domain Name Server to find a website, the computer uses an IP Address to locate it, which works universally because of Protocols. It was interesting to see how much thought had to go into everything when inventing the internet.
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