basic functions, typing from the keyboard two instructions: ping and traceroute. In Unix-like systems, they are available as a command line tool. In the same way, Microsoft Windows has the prompt of DOS working with those instructions. Criminal investigations Banks, software vendors and other online enterprises in the US and elsewhere became subject to strict "know your customer" laws imposed by the USA PATRIOT Act, the Bank Secrecy Act, the US Treasury Department's Office of Foreign Assets Control and other regulatory entities in the US and Europe from the early twenty-first century. These laws are intended to prevent money laundering, trafficking with terrorist organizations, and trading with banned nations. When it is possible to identify the true location of online visitors, geolocation can protect banks from participating in the transfer of funds for illicit purposes. More and more prosecuting bodies are bringing cases involving cyber-crimes such as cyber-stalking and identity theft. Prosecutors often have the capability of determining the IP address data necessary to link a computer to a crime. Fraud detection Online retailers and payment processors use geolocation to detect possible credit card fraud by comparing the user's location to the billing address on the account or the shipping address provided. A mismatch – an order placed from the US on an account number from Tokyo, for example – is a strong indicator of potential fraud. IP address geolocation can be also used in fraud detection to match billing address postal code or area code. Banks can prevent "phishing" attacks, money laundering and other security breaches by determining the user's location as part of the authentication process. Whois databases can also help verify IP addresses and registrants. Government, law enforcement and corporate security teams use geolocation as an investigatory tool, tracking the Internet routes of online attackers to find the perpetrators and prevent future attacks from the same location. Geomarketing Since geolocation software can get the information of user location, companies using geomarketing may provide web content or products that are famous or useful in that specific location. Advertisements and content on a website that uses geolocation software in the form of an API (also referred to as "IP API" or "IP address geolocation API") may be tailored to provide the information that a certain user wants. Regional licensing Internet movie vendors, online broadcasters who serve live streaming video of sporting events, or certain TV and music video sites