ALTER TABLE customer ADD CONSTRAINT customer_number_unique UNIQUE (customer_number);
<span>Second generation of computer apparatus. Second Generation: Transistors
(1956-1963)</span>
The world
would see transistors substitute vacuum tubes in the second generation of
computers. The transistor was created at Bell Labs in 1947 but did not see omnipresent
use in computers until the late 1950s.
The
transistor enormously higher positioning to the vacuum tube, allowing PCs to
transform into littler, speedier, less expensive, more vitality effective and
more dependable than their first-generation predecessors. Though the transistor
still generated a great deal of heat that subjected the computer to destruction,
it was a vast development over the vacuum tube. Second-generation computers
still confidence on punched cards for input and printouts for production.
<span> </span>
Answer:
Users can connect to a remote access server through a dial-up connection or a virtual private network (VPN) connection.
Explanation:
A dial-up connection requires both the server and the client computer to have a correctly configured modem. The client and the server connect over analog public telephone networks. To enhance the security of a dial-up connection, use data encryption, Windows logon and domain security, remote access policies and callback security.
The answer should be C
Getting rid of racism
Hope this helps
The NETWORK mask is and'ed with the IP address to get the network number.
Example:
192.168.1.1 & 255.255.255.0 = 192.168.1.0/24
It's worth the effort to do this in binary, it makes much more sense.
