Thursday's Assignment; What happened & What we learned

Team #5
Brandon, Kamil, Jason, & Anthony

Thursday's assignment was about testing our team communication, our knowledge, and innovation skills to present our performance as a real CISCO employee. Our main goal as a team was to get 2 computers fully operational and ready for work; but in order for our team to accomplish the objective we had to test our ability to construct a half-built computer. The problem with the computer was that is was missing many significant accessories (Components) for the computer to be functional without encountering any hardware errors. As a team, Jason and Kamil (Technicians) were installing the hardware components while Anthony and I gathered other requested gears that the Technicians required. It took us relatively around 1 hour to finally get 1 computer running without having any technical difficulties for the windows operating system to start-up. After our first milestone was achieved it was my duty to download and install linux, replacing the current operating system which contained windows xp.
When i got up to downloading the operating system we had to abort the task because our timing had come to an end; leaving the team in an attempted fail to complete our primary objectives. The main problem i would blame for our teams failure would be the lack of resources available to us, short amount of time, lack of brainstorming ideas, and not enough efficient teamwork that was put into the tasks. A resolution that would help benefit us next time would be to, co-operate fully as a team, listen to other ideas and become more open minded to the situation, and to work more fast without any flaws or errors when booting up the computer.

UDP and how it works with Transport

What is UDP and how it helps the Transport layer in TCP/IP & OSI Model

What is UDP you ask? UDP stands for User Datagram Protocol and it mainly supports the internet/network layer of the TCP/IP model. UDP is a way for data to be organized and sent through the network. It is made up of single unit data grams that is first eight 8 bytes contained with its own id and the remaining bytes contain message data. The UDP data gram ID's was consist of 4 different classes.

• source port number
• checksum
• datagram size
• destination port number

Source Port- Basically allows access from a variety of different application to maintain a path for data to transfer; this works along with the Destination Port number.
Checksum- Secures data from being corrupted
Datagram Size- The total amount of memory (bytes) contained in the ID datagram.

Transport Layer Problems of Sony (Playstation Network) & Blackberry

Sony's Problem

1. What Happened?
2. What was the Problem?
3. What caused it?
4. How was it fixed?
5. Did the Company repay their efforts?
   

The Playstation Network had a security breach from an anonymous user(s), the hackers breached the information of millions of customer's account data including credit card information, purchases, and other personal information. The Sony's website had a weak security system installed into their network so the hackers breached into their systems and blockaded it from everyone other than themselves. Sony solved the network problems by hacking the website back and improving their security network problems. Sony will compensate their customers because of the outrage that was caused by the users of Sony, most Sony users do not pay for their services in the play station network. However, there is a premium service that allows user's more access for the service which Sony compensated for.

Source for Sony

- http://www.huffingtonpost.com/2011/05/13/sony-playstation-network-breach_n_861816.html

-http://www.tgdaily.com/games-and-entertainment-brief/55659-sony-will-compensate-users-for-psn-outage

-http://www.computerworld.com/s/article/9216191/Sony_warns_users_of_data_loss_from_PlayStation_network_hackA)

BlackBerry's Problem

1. What Happened?
2. What was the Problem?
3. What caused it?
4. How was it fixed?
5. Did the Company repay their efforts?
   

The problem that Blackberry's Network had faced was a service problem. The Blackberry Network was offline and user's couldn't access any type of network ability whether it was text messaging, internet service, phone calls.etc. The problem was caused by a Switch crash within the data center of BlackBerry. In the articles listed below, it explains that RIM did not have enough capacity to support re-routed traffic to the countries served by Slough. One of the strategies they used to fix the problem was, to connect to other near by services by changing the network path (Data Traffic) to address closest to the switch that failed. So far from compensation, RIM has apologize for the switch failing and promises to offer something in return for its user's around the world that uses the Blackberry service. They promise to innovate the Blackberry even further to something close to the new windows 7 operating system. They do however, decide to fix the networking problem as soon as they can so that user's are using their money's worth to it's value.

Source for Blackberry
-http://www.cnn.com/2011/10/12/tech/mobile/blackberry-outage/?hpt=hp_c1&imw=Y
-http://www.pcworld.com/article/241917/rim_clueless_about_cause_of_blackberry_outage.html
-http://www.pcworld.com/businesscenter/article/241895/four_ways_rim_can_rebound_from_blackberry_outage.html

How does DHCP work?

DHCP stands for Dynamic Host Configuration Protocol, and it is a simple settings for a host's network. It makes it easier for the host because they have the ability to configure all of the network devices settings. It does the complicated network administrators job by simplifying it into a network protocol. The Protocol requires only an IP address to connect other devices into the internet. That is why it is call Dynamic Host Configuration Protocol, to configure the host's network.

Peer to Peer Client Server Model

Centralization

In my opinion, Server-Client is more centralized because all the messages are sent to one server and the messages are then sent back to the clients.

-Client-Server

• Advantages of Client-Server: Client server is good for getting messages from 1 source rather than relying on the message to go from multiple people.

• Disadvantage of Client Server: If the server is down then the messages can't be send back to the clients which can be devastating to many users.

-Peer to Peer

• Advantages of Peer to Peer: The advantages to P2P networks are that the messages are traveled through multiple clients through dedicated servers.

• Disadvantages of Peer to Peer: The network can be slower through P2P depending on the clients server connection which makes receiving the message longer.