Discussion Question

Descibe 10 different to-level domains:
.com/commercial
.org/organization
.edu/ education
.gov/governmental
.net/network
.int/International organizations
.mil/U.S military
.tel/internet communication services
. jobs/companies
.pro/professions

Chapter 8: Notes

GPS: Global positioning system

- A specialized netowork developed by US Department of Defense.

-A network interface card (NIC) permits direct network connection.

--> adds an additional serial port to the computer.

-Modem: a hardware device that connects a computers serial port to a telephone line,,,

-the modem converts the digital signals to analog so that the message can transmitted through telephone.

Broadband Connection: a connection with much greater bandwidth than modems have.

DSL uses standard phone lines.

DSL and cable modems have nowhere near the bandwidth of the fiber optic cables that are replacing copper wires.

the fastest growing wirelss LAN technology is know as Wi-Fi.

Bluetooth: named by a danish king.

-overcomes differencs between mobile phines handheld computers.

-with bluetooth its possible to create a personal area network (PAN)

Network operating system(NOS)

system handles communications among many workstations.

Networks are used to share information and is more efficient.

Enables people to workd togethers in ways which are not difficult or expensive.

Discussion Question

Suppose you have an important message to send to a friend in another city, and you can use the telephone, email, real-time teleconference, fax, or overnight mail service. Discuss the advantages and disadvantages of each. See if you can think of a situation for each of the five options in which that particular option is the most appropriate choice.

A situation that would require me to use the telephone, would be calling someone over-seas. The reason why a phone would be the best choice is because there may not be an accessible computer at the time or there might not be internet connection. Because of the fact that there may not be a computer, email, teleconference, and fax are not reasonable choices. A situation that would require email would be talking to a teacher or even simply sending something to a friend. Fax and real-time teleconference would best be used in businesses situations. Co-workers would be able to discuss important issues together without having to actually be in the same location at the same time. This also makes it easier to get work done quicker. Through fax people would be able to send important information to each other without having to go through the trouble of getting it there at that moment. Another option for sending something would be through overnight mail service. but that may not be the most practical considering how expensive it may get at times. Overall, all these choices have there own situations in which they would best be used.

S

Discussion Question

What have you done this week that directly or indirectly involved a database? How would your week have been different in a world without databases?
This week I used Google, which is considered to be a database. My week would have been very difficult considering that i used it almost everyday this week. Almost all of the research papers and other homework assignments given require us to use a database such as Google. Whether we have to research for an essay, or we need help with homework we almost always need to use a database.

Chapter 7: Review Questions

2.) What is the difference between a file manager and a database management system? How are they similar?
- A database "is a program or system of programs that can manipulate data in a large collection of files", while a file manager " is sufficient for mailing lists and other common data management applications." For larger and more comlex jobs, it is more reliable to use a database.
4.) What is a query? Give examples of the kinds of questions that might be answered with a query.
- A query is an information request. Ex: -Are there differenet types of queries?
7.) What does it mean to sort a data file?
- To sort a data files means to organize the database, in order to keep everything running properly.
9.) Describe how record matching is used to obtain information about you. Give an example.
-Record matching is used to find out information about you. For example, if you are located in more than one database then record matching would be able to pull out all your information through the database.