Author Question: SIP requires port ________ to be open. A) 47 B) 505 C) 3434 D) ... (Read 118 times)

acc299

  • Hero Member
  • *****
  • Posts: 569
SIP requires port ________ to be open.
 
  A) 47
  B) 505
  C) 3434
  D) 5060

Question 2

Explain the three classes of SQL commands and when they would be used.
 
  What will be an ideal response?


jojobee318

  • Sr. Member
  • ****
  • Posts: 298
Answer to Question 1

Answer: D

Answer to Question 2

There are three classes or types of SQL commands. Data definition language commands are used to create tables, alter and drop tables, views and indexes. These commands are used to build the structure of the database as well as some additional objects. The next type is Data Manipulation Language commands, which are used to maintain and query a database. Commands in this class include select, update, delete and insert. The last type is the data control language commands, which are used to grant and revoke privileges on tables and other objects in the database.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

For a complete list of videos, visit our video library