Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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- PLZ help with the following: Create a Crow’s Foot ERD. Draw YOUR entity relationship diagram (ERD) to indicate entities, relationships, connectives, and resolve M:N relationships. For the following: The faculty and students (we refer to them in our system as clients) can electronically check out any book at any time. A book must have at least one author but can have more authors. An author must have written at least one book or more to be included in the system. A book may have neverbeen checked out, but can be checked out many times by the same client or different clients over time. A client may have never checked out a book or they may have checked out many books over time. To simplify determining which client currently has a given book checked out, a M:N relationship between BOOK and CLIENT should be maintained. The information recorded for each book is book number, book title, book subject, and year of publication. For each author, the library records the author ID,…arrow_forwardPrepare an E-R diagram for a real estate firm that lists property for sale. Identify all entities (supertype/subtype), attributes (optional/required), unique identifiers, relationships and relationships cardinality and optionality. Resolve any M-M relationship you find. • The firm has several sales offices in several states. Each sales office has Office_Number and a Location. • Employees are assigned to work in different sales offices. Each employee has an ID and Name. • An employee must be assigned to only one sales office. For each sales office, there is always one employee assigned to manage that office. For each manager we record the start date of the management job. • The firm lists properties for sale. Each property has an ID, description and Location. Each unit of property must be listed with one (and only one) of the sales offices. A sales office may have any number of properties listed. • Each unit of property has one or more owners. owners have ID and Name. An owner may own…arrow_forwardExplain the rules and style guidelines for creating entity relationship diagramarrow_forward
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