Discuss the three generations of DBMSs.
What will be an ideal response?
The CODASYL and hierarchical approaches represented the first generation of DBMSs. They
were based on the concept that smaller components come together as parts of larger
components, and so on, until the final product is assembled. This structure, which conforms to
an upside down tree, is also known as a hierarchical structure.
Relational DBMSs are referred to as second-generation DBMSs. In 1970, E. F. Codd of the
IBM Research Laboratory produced his highly influential paper on the relational data model
(“A relational model of data for large shared data banks,” Codd, 1970). This paper was very
timely and addressed the disadvantages of the former approaches. Many experimental
relational DBMSs were implemented thereafter.
In response to the increasing complexity of database applications, two “new” systems have
emerged: the object-oriented DBMS (OODBMS) and the object-relational DBMS
(ORDBMS). However, unlike previous models, the actual composition of these models is not
clear. This evolution represents third generation DBMSs.
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a. subclass b. generic class c. concrete class d. parameterized class
Draw a use case and write up a use case scenario for getting two or three email accounts. Think aBout the steps that are needed to ensure security.\
The use case scenario follows.
A NIDS can inspect traffic and possibly remove, detain, or redirect malicious traffic
Indicate whether the statement is true or false
Which port does the Kerberos authentication protocol use?
A. 22 B. 23 C. 53 D. 88