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Get college assignment help at uniessay writers Write a 200- to 300-word response that explains the following: The article from Product News Network (2007) introduces 4TOPS, a mail merger that can be embedded within Microsoft® Access®. What are some key attributes of this product and how may it help the operations of an organization? How do third-party plug-ins change the process of diagnosing and troubleshooting errors within an application? What steps would you take in diagnosing an application that has been changed from its original state? How does this affect the level of support required to facilitate Microsoft® Access® users? Explain your answer.

What is the relationship between the variable SendBase in Section 3.5.4

What is the relationship between the variable SendBase in Section 3.5.4 of the textbook and LastByteRcvd in Section 3.5.5?

I have a homework assignment where we have to create a

I have a homework assignment where we have to create a computer program that will edit sounds. The software we are using is JES 4.0, my question is, how do you find the max/min sample values for a given sound?

Multiple discussions with two replies for each of the discussion

Multiple discussions with two replies for each of the discussion

Multiple discussions with two replies for each of the discussion

Multiple discussions with two replies for each of the discussion

what are the dimensions of a memory containing 1mb(2^20) bytes of

what are the dimensions of a memory containing 1mb(2^20) bytes of storage?how large would the MAR be? how many bits are sent to the row column decoders?how many output lines would these decoders have?

6. Suppose a given user view contains information about employees and

6. Suppose a given user view contains information about employees and projects. Suppose further each employee has a unique EmployeeNum and each project has a unique ProjectNum. Explain how you would implement the relationship between employees and projects in each of the following scenarios: a. Many employees can work on a given project, but each employee can work on only a single project. b. An employee can work on many projects, but each project has a unique employee assigned to it. c. An employee can work on many projects, and a project can be worked on by many employees.

7. A database at a college is required to support the

7. A database at a college is required to support the following requirements. Complete the information-level design for this set of requirements. Use your own experience to determine any constraints you need that are not stated in the problem. Represent the answer in DBDL. a. For a department, store its number and name. b. For an advisor, store his or her number and name and the number of the department to which he or she is assigned. c. For a course, store its code and description (for example MTH110 or Algebra). d. For a student, store his or her number and name. For each course the student has taken, store the course code, course description, and grade received. In addition, store the number and name of the student’s advisor. Assume course description, and grade received. In addition, store the number and name of the student’s advisor. Assume that an advisor may advise any number of students but that each student has just one advisor. 8. List the changes you would need to make in your answer to Question 7 if a student could have more than one advisor? 10. Illustrate the physical-level design process by means of the design shown in Question 7. List the tables, identify the keys and list the special restrictions that programs must enforce. 12. Design a survey for of your own. Fill it out as it might have been filled out during the database design for Premiere Products. For any questions you have too little information to answer, make a reasonable guess. 14. Describe the difference ways of implementing one-to-one relationships. Assume you are maintaining information on offices (office numbers, building, and phone numbers) and faculty (numbers and names). No office houses more than one faculty member; no faculty member is assigned more than one office. Illustrate the ways of implementing one-to-one relationships using offices and faculty. Which option would be best in each of the following situations? a. A faculty member must have an office, and each office must be occupied by a faculty member. b. A faculty member must have an office, but some offices are not currently occupied. You must maintain information about the unoccupied offices in an Office relation. c. Some faculty members do not have an office but all offices are occupied. d. Some faculty members do not have an office, but some offices are not occupied. 16. Describe the relationship between columns that can be null and entity subtypes. Under what circumstances would these columns lead to more than one entity subtype? 18. Describe the entity-relationship model. How are entities, relationships, and attributes represented in this model? What is a composite entity? Describe the approach to diagrams that uses a crow’s foot. Describe how you would represent cardinality in an E-R diagram.

The following exercises are based on the Premiere Products database as

The following exercises are based on the Premiere Products database as designed in Example 1. In each exercise, represent your answer in DBDL and with a diagram. You may use any of the styles presented in this chapter for the diagram. 1. Indicate the changes you need to make to Premiere Products database to support the following situation: A customer is not necessarily represented by a single sales rep but can be represented by several reps. When a customer places an order, the sales rep who gets the commission on the order must be one of the collection of sales reps who represents the customer. 2. Indicate the changes you need to make to the design of the Premiere Products database to support the following situation: There is no relationship between customers and sales reps.When a customer places an order, it may be through any sales rep. On the order, identify both the customer placing the order and the sales rep responsible for the order. 3. Indicate the changes you need to make to the design of the Premiere Products database in the event User View 3 requirements are changed as follows: For a part, store the part’s number, description, item class, and price. In addition, for each warehouse in which the part is located, store the number of the warehouse, description of the warehouse, and number of units of the part stored in the warehouse. 4. Indicate the changes you need to make to the Premiere Products database design to support the following situation: The region where customers are located is divided into territories. For each territory, store the territory number (a unique identifier) and territory name. Each sales rep is assigned to a single territory. Each customer is also assigned to a single territory, but the territory must be the same as the territory to which the customer’s sales rep is assigned. 5. Indicate the changes you need to make to the the Premiere Products database design to support the following situation: The region where customers are located is divided into territories. For each territory, store the territory number (a unique identifier) and territory name. Each sales rep is assigned to a single territory. Each customer is also assigned to a single territory, which may not be the same as the territory to which the customer’s sales rep is assigned.

Henry Books Case Ray Henry is considering expanding the inventory at

Henry Books Case Ray Henry is considering expanding the inventory at his book stores to include movies. He has some special ideas for how he wants to implement this change, and he needs you to help with database design activities. In each excercise, represent your answer in DBDL and with a diagram. You may use any of the styles presented in this chapter for the diagram. 1. Design a database for Ray. He is interested in movies and wants to keep information on movies, actors, and directors in a database. The only user is Ray, and he needs to produce the following reports: a. For each director, list his or her number and name and the year he or she was born. If the director is deceased, list the year of death. b. For each movie, list its number, its title, the year the movie was made, and its type (for example, Comedy, Drama, or Science Fiction). c. For each movie, list its number, its title, the number and name of its director, the critics’ rating, the MPAA rating (G, PG, PG-13, or R), the number of awards for which the movie was nominated, and the number of awards the movie won. (The critics rate the movie with a number of “stars.” Four stars is the top rating possible. Zero stars is the worst possible rating.) d. For each lead actor starring in each movie, list his or her number, name and birthplace and the year he or she was born. If the actor is deceased, list the year of death. e. For each movie, list its number and title, along with the number and name of the actors who appeared in it. f. For each lead actor starring in each movie, list his or her number and name, along with the number and name of the other movies in which the actor starred. 2. Expand the database design you created in Exercise 1 so that it will also support the following situation: Ray wants to start a DVD rental program at his stores that he plans to call Henry’s DVD Club. He refers to each of his customers as “members.” Each member in the club is assigned a number. He also stores the member’s names and addresses. In addition, he stores the number of rentals a member has made and the date the member joined the club. He periodically has promotions during which members can earn bonus units that they can later apply to the cost of renting DVDs. He needs to store the number of bonus units a member has earned. 3. Expand the database design you created in Excercise 1 and modified in Excercise 2 so that it will also support the following situation: Ray wants to store information about the DVDs the club owns. When the club purchases a DVD, Ray assigns it a number. Along with the number, he stores the number of the movie on the DVD, the date the DVD was purchased, the number of times it has been rented, and the number of the member who is currently renting it. (If the DVD is not currently being rented, the member number will be null.) Ray also needs to store the number of the branch to which the DVD is assigned. Finally, Ray would like to store the history of the rental of each particular DVD. In particular, he needs to store the DVD number, date of the rental, date it was returned, and number of the member who rented the DVD. Assume a DVD could potentially be rented more than once on the same day.(Hint: Review the discussion of the categories of primary keys to determine what type of primary key would be appropriate for this relation.)

a) Name the five layers of the Internet protocol stack and

Get college assignment help at uniessay writers a) Name the five layers of the Internet protocol stack and give an example of protocol for each layer (except for the lowest layer). Do not use abbreviations or acronyms. (4 points) b) Switch tables can get large for large LANs since each station requires one entry. In order to reduce the number of entries, your colleague suggests using prefix aggregation for Ethernet MAC addresses similar to how it is used in CIDR for IP. What do you think of this suggestion? (2 points) c) What are the three most common packet sizes in the Internet? Explain why this is the case. (3 points) Question 2 (10 points): Answer the following questions regarding transport protocols and their performance. Assume a network uses 100 Mbps links with a 1 ms one-way end-toend delay between two nodes. Also assume that these nodes use a sliding window transport protocol with a maximum window size of 3 packets and a fixed packet size of 1300 bytes (50 bytes of headers and 1250 bytes of payload). Assume acknowledgement packets are 50 bytes in size. There is no connection setup. a) What is the throughput of this protocol from the point of view of the endsystem application (i.e., how much payload data can the protocol transfer per second)? Assume queuing and processing delays are zero, but consider transmission delays. Please report your results in bits per second, not bytes per second. (5 points) b) What changes could be made to the transport protocol to increase the throughput? (2 points) c) What window size would be necessary to achieve 80 Mbps of throughput from the point of view of the end-system application? (3 points) Question 3 (14 points): Answer the following questions regarding IP address allocation and routing tables. a) Consider the network topology shown below. Assume you are given an address block of 128.119.86.128/25. Assign a suitable address to each network interface (enter IP address in white rectangular box). Allocate addresses such that they can be aggregated into prefixes. Note the network prefix in the while oval

Consider a fictional company with offices in Toronto, Houston, and Los

Consider a fictional company with offices in Toronto, Houston, and Los Angeles. Each of these sites employs 300 people. Make assumptions about connections, applications,

What is the data transfer rate in bps of a signal

What is the data transfer rate in bps of a signal that is encoded using phase modulation with eight different phase angels and a baud rate of 2000?

A signal starts at point X. As it travels to point

A signal starts at point X. As it travels to point Y, it loses 8 dB. At point Y, the signal is boosted by 10 dB. As the signal travels to point Z, it loses 7 dB. What is the dB strength of the signal at point Z?

6. Give an example of at least two other “devices” that

6. Give an example of at least two other “devices” that may contain additional BIOS instructions: 7. Why would certain “devices” contain additional BIOS instructions, and what is the advantage of this practice? 8. Approximately how big is the “boot record”, and where is it typically located: 9. What is the file: “NTLDR”, what does it do during computer start-up and what is its source: 10. In MS-DOS, what does the IO.SYS file contain, and what does this file do once loaded: 11. In MS-DOS, why are “device drivers” created and maintained separate from BIOS: 12. In Linux, how many different boot images can LILO handle: 13. What are the three parts of the Linux kernel version number, and which is least likely to change: 14. What are “BogoMIPS”, and what is their significance: 15. During the Windows NT OS load, what is the first action the program “NTLDR” takes: 16. In the Windows NT OS, what is the file “NTDETECT.COM” also known as, what are its tasks similar to: 17. In the Windows NT OS, what does the acronym “LSASS” mean: 18. During the Windows NT OS load, what are the names of the two “ControlSets”:

Suppose that a computer using direct-mapped cache has 2^24 words of

Suppose that a computer using direct-mapped cache has 2^24 words of main memory and a cache of 64 blocks, where each cache block contains 16 words. A. How many blocks of main memory are there? B. What is the format of a memory address as seen by the cache? That is, what are the sizes of the tag, block and word fields? C. To which cache block will the memory reference (20DB63)base16 map?

• List three things that a Web designer must consider and

• List three things that a Web designer must consider and understand about the purpose or target audience prior to site development. Why do you feel each of these is important to a successful plan?

1. Using the English alphabet (i.e., mod 26 arithmetic) let plaintext

1. Using the English alphabet (i.e., mod 26 arithmetic) let plaintext = {p1, p2,… , pn} and corresponding ciphertext = {c1, c2,… , cn}. Suppose the encryption function is ci = pi 15 (mod 26). If you receive the ciphertext message YPHDCRPBEQTAA, decrypt to recover the plaintext. What is the decryption function, and the recovered plaintext? What type of cipher is this? 2. A 1,048,576-bit message is used to generate a 10-bit hash. One the average, how many other messages could be expected to generate the same hash value?

Write a program that generates the grocery bill for different customers.

Write a program that generates the grocery bill for different customers. 􀂃 Your program keeps asking the price and the quantity of each item for a customer 􀂃 calculates the total 􀂃 calculates the tax (6.75%) 􀂃 calculates the final cost 􀂃 printout the final cost 􀂃 If there is another customer, calculate his/her bill, Otherwise output a good by message. 􀂃 The price -1 indicates the end of the purchases for a customer 􀂃 Use a constant for the tax rate

Assume the int variables i and result , have been declared

Assume the int variables i and result , have been declared but not initialized. Write a for loop header — i.e. something of the form for (  .   .   .   ) for the following loop body: result = result * i; When the loop terminates, result should hold the product of the odd numbers between 10 and 20.

Show how the value ASCII “MIRIAM” is stored in memory in

Show how the value ASCII “MIRIAM” is stored in memory in Little Endian format starting at location 100 hexadecimal

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