III - Information Security

This week we defend our case study, we had Security on automated controlled vehicles which is a new thing for all of us. Our group presented the topic well, we are also united in solving our case study and we are able to gather the informations we need but our professor suggest that we should add one more reference to convince others that self driving cars are not yet ready for the world to use, and I think that he has a good point on what we should add. The case study is also our midterms, it is a good thing that we don't have a midterm exam for infosec, because we are able to apply our learning in an actual activity. Doing projects such as case study and machine projects are more useful instead of doing an exam, because we are able to use our skills and intelligence in doing those kinds of programs, plus we are able to analyze different security problems and we are able to solve them.

II - Information Security

This week is full of activities, we don't have so much lesson because we had a debate about some security issues. Our group had Piracy: Is it good or bad. We had the government side which means that we are on the good side and that Piracy should not be allowed. Our group defended our side well and we did our best, and that is what matters the most.

For this day, we used the time for infosec to attend a seminar about Windows 10 and the good thing about it. The speaker is persuading us to upgrade to Windows 10 because it is free until October and he is telling all the good things about Windows 10. For me, windows 10 is better that the other windows upgrade. Plus our speaker is really funny and he never failed to persuade many of us.

I - Information Security

Information Security, from the word itself security, this course is all about security and the different classifications of it. For me it is a good thing that our professor is not new to us, he is also our professor before in Opesys1 which is a good thing because we already know his approach. In this course, I expect to learn more on our security and what are the examples of the viruses that cannot be read by the antiviruses and I also want to know how to make a virus, for educational purpose only ofcourse. I also hope to learn how to make my computer more secured.

In this subject, we don't have any midterm exam, for the midterms we only have a case study. It is both a good and bad thing for me. Bad because what is our case study failed, we don't have a back-up plan and Good because it is less work for us. But we have a final exam and a project for our finals which is a good thing so we can apply the things we learn in a software. 

Paging

For this week we discussed about Paging. This is also a process schedule but a different version. It is easy for me because first of all it is discussed well but sometimes I'm getting consfused on the questions. Even though I know how to answer it I'm not sure if what i'm doing is the correct answer for the question or maybe I'm doing other formulas but I just need to understand it more so I will not get confused on the exam. Our second to the last meeting, we just had a board work and I'm relly happy because I answered on the board again!! Yaaay for +10 on the exam. I guess I really learned a lot in Opesys1 and I really enjoyed the second half of the subjects because I really like computing or application type of exam/topic.

Process Scheduling-Part II

For the past few weeks we are still talking about the process scheduling but this time it has a different version such as Best fit, Worst Fit, and First fit and for the MVT or Multi-programming variable task are the with compaction and of course without compaction. For me the easiest for the first part is the First fit because this is only based on the first process that will come and if it can fit on the given space. The second easiest for me is the best fit and the hardest is the Worst fit because it is kind of tricky and sometimes I get lost while doing the tables. For the MVT I guess all of us will say that the with compaction is easier compare to without compaction. With compaction is really easy because you can move the process up if it is already done processing but when it comes to without compaction you cannot move the process up if the first process is already done. This is really tricky for me because sometimes even though the process cannot fit, I still put them in that given space because I thought I can still use the extra spaces at the end of the last process but you cannot so I really find it tricky.

Our lesson is easy for me as long as I listen to our lesson plus I really get it compare to the other process schedules which are very tricky compare to this one. The board work and exercise work for me to understand more the topic. I hope next time we still have a board work.

Process Scheduling

Since last last week we started discussing the Process Scheduling. We already discussed four (4) types, these are: First come first serve, Shortest Job First-NP, Shortest Job first-P, Round Robin and Highest Response Ratio Next. In the problem, our professor will give us the Arrival time (AT) and the Burst Time (BT). We should do three (3) steps in every problem, first is the Summation of the Burst Time, it is easy because we will only get the sum of the burst time. Second is the Gantt' Chart which I find tricky especially when I use the Shortest Job First-P. And last the Performance table which depend on the Gantt' Chart, it is easy but you just need to make sure that your Gantt' Chart is correct for the Performance table to be correct.

The First come first serve, for all of us it is the easiest because you will only base the process on the Arrival Time (AT). The shortest arrival time would be the first to be processed. Second we discussed the Shortest Job First-NP, it is also easy for me. The process will be based on the Arrival time and the burst time, if next arrival times is already in, then your process would be base on your burst time, the shortest burst time would be processed first. And last but not the least we discussed the Shortest Job First-P which I find really tricky because I don't know if you should already insert the process or not yet because you need to subtract from the burst time if the process' arrival time will enter. Next in the Process Scheduling is the Round Robin which I find kind of easy compared to the SJF-P because you need to subtract the TQ to the burst time. Last is the Highest Response Ratio Next which I guess is like the FCFS but you need to find for the RR and there is a given solution to find that, well I'm not really that sure because my mind was already flying because of the Round Robin. 

I enjoyed the topic but I'm just really confused with the other Process Schedules, but I really enjoyed the FCFS, SJF-NP, and the RR. I'm trying my best to learn the other processes but when we were doing it on the board it is so easy but when I'am already on my own, I'm like "Paano ulit 'to?" and again i'm confused, but when we will already answer the example exercise, I will say "Ahh, ganun pala yun, gets ko na." then when we will answer individually, I'm lost. AGAIN. Sad truth about my life huhuhu. But I really need to learn it because it is a big part in the subject Operating System. 

For the last two weeks I learned a lot of different lessons in Opesys. First is the Security Architectural Models which are Bella La Padula Model, Biba Model and Clark Wilson Model. I was quite confused because I wasn't able to understand it at first but at the end I already did, Yipee! I can say that when you will do it, you should really focus and put your mind in to it. You should also know the ranking of the Topsecret, Secret, Confidential and Public.

The main thing that I learned for the past three weeks is how to code and make a new user in Linux. I also learned how to put it in a group, how to create a group, how to put a password on the user that I made and I also learned how to change the access of a specific group, if they can write, read or both. It is really cool and fun as well, as long as you know the code you can add users as long as you want and you can also change their accessibility because that is your account or your user.

On our last meeting, we had a quiz and it's sad to say that I did not passed but it is okay because there is always a next time:)