Awesome question! I love networking. When you enter a URL into your browser, your computer sends the request to your ISP or internet service provider. Your ISP has a HUGE database that coordinates the IP address to the domain name. This database is called a DNS, or Domain Name Service. So when you submit www.google.com to your ISP, they return look in the DNS and find the IP address. The ISP then returns the IP address to you. Your browser then takes the IP and connects you to the server. The server finally send the index.html file to and your browser and renders it as a web page.
This all happens in the blink of an eye. The internet is truly amazing :D
Answer:
B.O(n).
Explanation:
In an ADT graph the method addEdge uses an Array of list.So in the worst case and the worst will be when the list already has n elements in it.
So to add an edge we have to iterate over the list upto nth element and then add the edge after that.So it has to travel over n elements.
So we can say that the answer is O(n).
Answer: create a custom template
Explanation:
Since Sarah is having a hard time finding a template for her advertising business that she may be able to use at a later date and also make it available to her colleagues, her best option will be to create a custom template.
Creating a custom template will ensure that she makes the template based on her requirements and can tailor it specifically to her needs which then makes it unique.
Answer: The statement implies that the hackers psychologically manipulate the human to access the information they need.
Explanation: The author states that the hacker does not only exploits technology to get system access or to gather information. But there is another pivotal part of hacking. He refers to this part as "social engineering".
Social engineering from information security perspective means manipulate human emotions and convincing them to disclose some confidential information. Hacker often hacks or defrauds after gaining confidence and trust of a person.
Phishing is an example. It is a fraudulent technique for getting some secret information. Phisher sends an email pretending to be from some reputable organization to persuade people to divulge private information like passwords and credit card numbers, ATM card pin etc.
