Which of the following is used to house FTP servers, mail servers, and web servers so that people on the Internet can access them but cannot access any other of the organization's servers?
A. DMZ
B. Intranet
C. Subnet
D. VLAN
A. A DMZ is used to hold servers that will be accessed by people on the Internet. This way, those external users will not have access to the organization's LAN.
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When designing a class hierarchy, it is important that common features be ________________________
a) higher in the class hierarchy. b) lower in the class hierarchy. c) near the middle of the class hierarchy. d) in abstract classes. e) in the Object class.
Which of the following is a default Intune device group?
A. All Desktop Computers B. Windows Devices C. All Mobile Devices D. Non-Windows Devices
Suppose each of the following Update operations is applied directly to the database of Figure 3.6. Discuss all integrity constraints violated by each operation, if any, and the different ways of enforcing these constraints:
(a) Insert < 'Robert', 'F', 'Scott', '943775543', '21-JUN-42', '2365 Newcastle Rd, Bellaire, TX', M, 58000, '888665555', 1 > into EMPLOYEE. (b) Insert < 'ProductA', 4, 'Bellaire', 2 > into PROJECT. (c) Insert < 'Production', 4, '943775543', '01-OCT-88' > into DEPARTMENT. (d) Insert < '677678989', null, '40.0' > into WORKS_ON. (e) Insert < '453453453', 'John', M, '12-DEC-60', 'SPOUSE' > into DEPENDENT. (f) Delete the WORKS_ON tuples with ESSN= '333445555'. (g) Delete the EMPLOYEE tuple with SSN= '987654321'. (h) Delete the PROJECT tuple with PNAME= 'ProductX'. (i) Modify the MGRSSN and MGRSTARTDATE of the DEPARTMENT tuple with DNUMBER=5 to '123456789' and '01-OCT-88', respectively. (j) Modify the SUPERSSN attribute of the EMPLOYEE tuple with SSN= '999887777' to '943775543'. (k) Modify the HOURS attribute of the WORKS_ON tuple with ESSN= '999887777' and PNO= 10 to '5.0'.
One of the reasons Facebook is losing popularity is due to excessive commercialization, where users were shown full-page ads for movies or musical artists, as well as banner ads that appeared at the top of most pages
Indicate whether the statement is true or false