What portion of your ISP contract might affect your ability to conduct a penetration test over the Internet

ISP stands for Internet Service Provider and it's the company that provides the connections to access the Internet.When you connect to your ISP's pop, the ISP and the equipment at the pop go through a process called handshaking, establishing the speed of the internet connection, and then proceed to authentication. Handshaking is the exchange of signals between devices in order to regulate the data transfer. Authentication is the verifying of the identity of a user or process.

Explanation:

answera hit;

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.