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A special diagnostic connection that can be used by administrators when other connections are unavailable. A method of ensuring that a particular value is entered into a column if no value is provided.

SELECT Col1 FROM Test.TableA WHERE Col2 = 1;

1. You want your password policies to apply to existing SQL Server logins. What do you do 2. How can you enforce password expirations on SQL Server logins

1. You need to use the ALTER LOGIN statement with the CHECK_POLICY option. Or you can open the properties of the SQL Server logins and select the Enforce Password Policy option. 2. To enforce password expirations, you can use the CHECK_EXPIRATION option or select the Enforce Password Expiration option.

For an index to cover this query, it must contain at least the columns Col1 and Col2. You can do this in several ways. All of the following indexes would cover this query:

An important aspect of password policy is password complexity. Password complex ity requirements are designed to deter brute force attacks by eliminating common passwords and by increasing the number of possible passwords. When password complexity policy is enforced, new passwords must meet the following guidelines:

A process by which a client can connect one instance of SQL Server to another by having his or her credentials forwarded.

CREATE CREATE CREATE CREATE CREATE CREATE NONCLUSTERED NONCLUSTERED NONCLUSTERED NONCLUSTERED NONCLUSTERED NONCLUSTERED INDEX INDEX INDEX INDEX INDEX INDEX TestIndex TestIndex TestIndex TestIndex TestIndex TestIndex ON ON ON ON ON ON Test.TableA Test.TableA Test.TableA Test.TableA Test.TableA Test.TableA (Col1, (Col2, (Col1) (Col2) (Col1, (Col3) Col2); Col1); INCLUDE (Col2); INCLUDE (Col1); Col2, Col3); INCLUDE (Col1, Col2);

The password cannot contain all or part of the user s account name. Part of an account name is defined as three or more consecutive alphanumeric characters,

delimited on both ends by white space (space, tab, return, and so on) or any of the following characters: , . - _ #.

As you can see, the columns only need to be found in the index; their position and whether they are found in the index key or are included columns (discussed in this lesson) does not

The password is at least eight characters long. The password contains characters from three of the following four categories:

An attack in which a server is flooded with spurious requests, reducing the server s availability. The services and drivers that a service requires to be active before the service runs. the last full backup are archived.

7

Latin uppercase letters (A Z) Latin lowercase letters (a z) Base 10 digits (0 9) Nonalphanumeric characters (for example: !, $, #, or %)

In Group Policy, you can apply GPOs to sites, domains, and OUs. When password policies are deployed through Group Policy, it is essential to remem ber that these policies take effect only when they are applied to domain-level GPOs. In other words, you cannot set a particular password policy for an OU such as one used for a specific department (for example, Finance or Human Resources). If a specific department within your organization requires a password policy that is distinct from that of the rest of the domain, you should create a new domain for that department and configure the required password policy at the domain level of the new domain.

matter. Of course, both the execution plan and the performance could differ greatly between these indexes; however, they all cover the query. The performance benefit gained by using a covered index is typically great for queries that return a large number of rows (a non-selective query) and small for queries that return few rows (a selective query). Remember that a small number of rows could be 10 for a table with a couple of hundred rows and 1,000 for a table with millions of rows. Following is a performance comparison of four queries. The table that the queries are executed against has the following schema and is populated with 1,000,000 rows:

In this exercise, you create a password policy that enforces complexity requirements. 1. On DBSRV1, click Start, choose Administrative Tools, and then choose Local Security Policy. 2. In the console tree of Local Security Settings, expand Account Policies. 3. Select Password Policy. 4. In the right pane, double-click Password Must Meet Complexity Requirements. 5. Enable this policy and then click OK. 6. Close the Local Security Settings console.