Please see the attached documents Please only answer question 3

Module 6 Key Topics 1) 2) 3) 4) Corporate Data is doubling every 6 months Corporate data can be the source of competitive advantage Relational databases are historically most common For companies using structured databases, getting new data into a usable form is sometimes a limiting factor in using it A. Often it takes processing and moving transaction data to a data warehouse, data mart to use it 5) For unstructured data, Hadoop provides tools for manipulating data 6) Organizations use canned, ad hoc reports, digital dashboard, and OLAP to create information out of data 7) Finding a pattern in data does not necessarily mean there is a clear relationship 8) An analytics team needs three skills: information technology, statistics, & business knowledge 9) The Internet is a network of networks 10)A URL is associated with an IP number A. A URL is registered with a domain registry B. An IP number (IPV4/IPV6) is issued by your Internet service provider, and you use it as the internet address of your web server C. DNS looks up the association between the URL and the IP address D. Users' web browsers use DNS to lookup the IP number associated with the URL they type in or click on 11)Application layer is at the top and includes email clients and web browsers. 12)TCP/IP is a major key to the operation of the Internet A. Transport layer: TCP establishes end-to-end connections between sender and receiver. Breaks up message/web pages/videos/music into packets. Numbers packets for reassembly at other end. B. Network layer: Makes routing decisions. Assigns the IP address of the destination to packets. Sends packets to the next computer/router/switch, and does error correction. 13)Data link layer formats packets for the media used. It controls when a device communicates over the media. It detects and corrects error in transmission 14)NAT: Maps a private network's internal IP numbers to a single Internet connected device's IP number. 15)The Internet is a network of Packet Switched networks. Packets are routed or switched from one node to the next node along the path to the destination