Amplification is prevented if global changes have only a local effect as opposed to systems in which global changes have a local effect
Amplification is prevented if local changes have only a local effect as opposed to system inwhich localchange have a global effect
Internet domain does not suffer from“The Amplification Principle”as BGP takes care of misbehaving advertisers
None of the above
第1题：
A. The SELECT statement is syntactically accurate.
B. The SELECT statement does not work because there is no HAVING clause.
C. The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.
D. The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
第2题：
Click the Exhibit button and examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP BY department_id);Which statement is true?（）
A.The SELECT statement is syntactically accurate.
B.The SELECT statement does not work because there is no HAVING clause.
C.The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.
D.The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
第3题：
The user Sue issues this SQL statement:GRANT SELECT ON sue. EMP TO alice WITH GRANT OPTION; The user Alice issues this SQL statement:GRANT SELECT ON sue. EMP TO reena WITH GRANT OPTION; The user Reena issues this SQL statement:GRANT SELECT ON sue. EMP TO timber;The user Sue issues this SQL statement:REVOKE select on sue. EMP FROM alice;For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?（）
A. Alice only
B. Alice and Reena
C. Alice, Reena, and Timber
D. Sue, Alice, Reena, and Timber
第4题：
Which statement describes VRRP object tracking?（）
第5题：
A.It monitors traffic flow and link utilization.
B.It ensures the best VRRP router is the virtual router master for the group.
C.It causes traffic to dynamically move to higher bandwidth links
D.It thwarts man-in-the-middle attacks.
第6题：
Examine the description of the MARKS table:SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects.Examine this SELECT statement based on the MARKS table:What is the result of the SELECT statement?（）
A. The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.
B. The statement returns an error at the SELECT clause.
C. The statement returns an error at the WHERE clause.
D. The statement returns an error at the ORDER BY clause.
第7题：
A. Point to Point
B. Point to Multipoint
C. VLAN
D. Ring
E. Bus
第8题：
A. Immediately after the SELECT clause
B. Before the WHERE clause
C. Before the FROM clause
D. After the ORDER BY clause
E. After the WHERE clause
第9题：
What is a sub-select statement?
A．a select statement that selects a subset of fields in a table
B．a select statement that returns a subset of the data in a table
C．a select statement that appears within another select statement
D．a select statement that returns a subset of the constraints on a field
第10题：
Which statement best describes what Cisco Smart Care Service provides?（）