Answer:
Is is also a computer science acronym that implies bad input will result in bad output. Requiring valid input also helps programs avoid errors that can cause crashes and other erratic behavior.
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Answer:
An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions. When an error occurs within a method, the method creates an object and hands it off to the runtime system. ... This block of code is called an exception handler.
Answer:
1)No food or drinks in the computer lab
2) When using the computer in the lab enviroment make sure to use headphones and if not to keep the volume muted at all times so others aren't disturbed.
3)When leaving the computer lab make sure to clean up the area and to leave anything that was in the computer lab originally, in the spot it was before.
Answer and Explanation:
Given data:
Distance (D) = 40 KM
Speed of light in the fiber =Distance/ speed of light in the fiber
a) Delay (P) = Distance/ speed of light in the fiber
= (40,000 Meters/2×108 m/s)
=( 40×103 Meters/2×108 m/s)
Propagation delay (P) = 0.0002 seconds or 200 microseconds
b)
if propagation delay is 0.0002 Seconds roundup trip time (RTT) will be 0.0004 Seconds or 400 micro Seconds
Essentially since transmission times and returning ACKs are insignificant all we really need is a value slightly greater than 0.0004 seconds for our timeout value.
c)
The obvious reasons would be if the data frame was lost, or if the ACK was lost. Other possibilities include extremely slow processing on the receive side (late ACK).
Or Extremely Slow Processing of the ACK after it is received back at the send side.
Attackers have the ability to take control of the database server by taking advantage of buffer overflows, SQL Injection, etc. No authentication is required because the attack might be carried out through a web application by utilizing SQL injection. Databases can be breached from the Internet in this method, and firewalls can be entirely disregarded.
<h3>Explain about the database protect from hackers?</h3>
Although there are many different kinds of databases and countless techniques to hack them, most hackers either attempt to guess the database root password or use a known database attack. You can hack a database if you're familiar with SQL statements and know the fundamentals of databases.
You should adopt several database security measures in your company, including encryption, authentication, backup, application security, and physical security.
Hackers frequently steal information to assume your identity and then use it for other purposes, such as applying for a loan, transferring money, etc. Since Internet and mobile banking have become more common, the frequency of these events has increased.
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