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Question: At the beginning of this chapter, you received the following assignment: You are the network administrator for a wide-area backbone network that serves your company's many offices across the country. Messages travel through the network by being routed from point to point until they reach their destination. Each node in the network therefore acts as a switching station to forward messages to other nodes according to a routing table maintained at each node. Some connections in the network carry heavy traffic, while others are less used. Traffic may vary with the time of day; in addition, new nodes occasionally come on line and existing nodes may go off line. Therefore you must periodically provide each node with updated information so that it can forward messages along the most efficient (that is, the least heavily traveled) route. How can you compute the routing table for each node?
You realize that you can represent the network as a weighted graph, where the arcs are the connections between nodes and the weights of the arcs represent traffic on the connections. The routing problem then becomes one of finding the shortest path in the graph from any node to any other node. Dijkstra's algorithm can be used to give the shortest path from any one node to all other nodes (see Exercise 9), so you could use the algorithm repeatedly with different start nodes. Or you could use Floyd's algorithm. Discuss the advantages and disadvantages of each approach, including an analysis of the order of magnitude of each approach.
Visual Studio Express to build a Web-site with Access database - Olivias Mountain Adventure Store (OMAS)
Modern relational database management systems have been around for a relatively short period of time.
The Entity-Relationship Diagram is widely used in the design of relational databases. Why do you think this is so - what is it about this model that makes it the ideal choice for relational database design?
Determine the unit product cost of each of the company's two products under the traditional costing system
Write a query to list the title and price of all items that have been ordered by customer Millerton. Write a query to list thelast name and order id of customers that ordered any items by the artist Burt Ruggles?
What is meant by a weak relationship? Provide an example. What is meant by weak entity? What do you understand by relationship degree?
Discuss the advantages of a database management approach to the file processing approach? Give examples to illustrate your answer. Outline the benefits and limitations of the relational database model for business applications today
Draw ERD with key attributes. You can use any notation to draw the ERD. Must include legend - Data dictionary for the above scenario
Return the empid, firstname, lastname, and city for the employee with empid 9. Return a list of employee id's, last names, and first names for employees hired on or after January 1, 2004. Retrieve the product name and unit price of all products that ..
Imagine that you have been hired by a company to build a database for it and complete the following tasks - modeling of business requirements and understand the physical implementation of logical business models through the use of E-R models.
Which of the following Windows commands will shutdown and restart your computer in 2 minutes? Which of the following Windows commands will shutdown and restart the computerFileServer in 2 minutes
Examine a query written against the database. You will examine the entity/relationship diagram (ERD) and in writing explain what information the database is holding (not the specific data, but in words what the business application is and how that ..
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