If we can label the nodes in a graph such that the Laplacian matrix of the graph is circulant, then such a graph is known as a shift invariant graph [16]. The eigenvectors of the Laplacian matrix of a shift invariant graph are the same as the columns of the DFT matrix. One example of a shift invariant graph is the ring graph. Draw two more shift invariant graphs and verify that the eigenvectors of the corresponding Laplacian matrices are the same as the columns of the DFT matrix. Also comment on the eigenvalues of the Laplacians of the shift invariant graphs.

Answer the following statements true (T) or false (F)

1. A view cannot provide restricted access to a relational database so it cannot be used for security purposes. 2. The database management system makes use of the database description tables to manage the physical database. 3. Two disadvantages to database encryption are key management and inflexibility. 4. Fixed server roles operate at the level of an individual database. 5. SQL Server allows users to create roles that can then be assigned access

A __________ attack targets wireless access points that are exposed to non-filtered network traffic, such as routing protocol messages or network management messages.

Fill in the blank(s) with the appropriate word(s).