A DNS server is a computer server that contains a database of public IP addresses and their associated host names and, in most case, is used to resolve or translate these common names into IP addresses as requested. DNS servers run special software and communicate with each other using special protocols. Say no to plagiarism. Get a Custom Essay on “Why Violent Video Games Should Not Be Banned”?Get an Original EssayEasiest way to understand the terms: A DNS server on the Internet is the device that translates this www.amazon.com as you type your browser to the IP address 151.101.129.121 which it actually is. Therefore, we have DNS servers because we not only want to use human-readable names to access websites, but also because computers need to use IP addresses to access websites. The DNS server is that translator between the host name and the IP address. DNS Cache PoisoningDNS cache poisoning, also known as DNS spoofing, is a type of attack that exploits vulnerabilities in the Domain Name System (DNS) to hijack Internet traffic from legitimate servers to fake servers. One of the reasons why DNS poisoning is so dangerous is that it can spread from one DNS server to another. In 2010, a DNS poisoning event allowed China's Great Firewall to temporarily escape China's national borders, censoring the Internet in the United States until the problem was resolved. However, if the malware were to change your DNS server settings (which may be happening behind the scenes without your knowledge), entering the same URL may direct you to a completely different website, or, more importantly, to a website that looks like your bank's website but isn't really. This fake banking site may look exactly like the real thing, but instead of letting you log into your account, it may simply log your username and password, giving scammers all the information they need to access your bank account. However, it is usually malware. that hijacks your DNS servers usually just redirects popular websites to ones full of advertisements or fake virus websites that make you think you need to buy a program to clean an infected computer. The Internet does not have just one DNS server, as this would be extremely inefficient. Your Internet service provider maintains its own DNS servers, which cache information from other DNS servers. Your home router functions as a DNS server, which caches information from your ISP's DNS servers. Your computer has a local DNS cache, which allows it to quickly refer to DNS lookups already performed rather than performing a DNS lookup over and over again. DNS poisoning like this can also spread. For example, if multiple ISPs obtain their DNS information from the compromised server, the poisoned DNS entry will propagate to the ISPs and be cached there. It then spreads to home routers and computers' DNS caches as they look up the DNS entry, receive the incorrect response, and store it. CDNetworks offers an authoritative, global, managed, cloud-based DNS service that ensures websites can be reached, efficiently and quickly. User portal with advanced management and control features. Provides DNS security, protecting against spoofing and network poisoning.