The faster your computer will receive a spider response from the DNS server, the faster it starts t

DNS servers - this domain name servers serving. They determine which servers serve your e-mail. mail, web site and so on. DNS server in the face of challenges, these services server addresses is unknown and they become unavailable. That everything runs smoothly, reliable DNS server is necessary. How does DNS servers?
For each visitor's computer in order to find your website vanity fair 2011 appeals to the domain register domain serving DNS servers. He asks your web server with an IP address (What is an IP address?). Just as every other server that you want to deliver e-mail. mail, you must get your e-mail. the server's IP address.
Each service provider's DNS server network is unique. Qualitative DNS servers determine vanity fair 2011 three parameters practically all your web-based vanity fair 2011 systems used in aspects vanity fair 2011 of operating speed, reliability and security. When choosing DNS service provider, vanity fair 2011 see if they correspond to your needs. DNS server speed
The faster your computer will receive a spider response from the DNS server, the faster it starts to load the website. Each visitor waiting second you mean lost revenue. Articles on this subject abound and the Lithuanian press. In the future, new research data and describe your blog.
DNS server response rate generally proportional to the physical vanity fair 2011 distance to the server. Each adds up to 100km 5ms waiting. So if we have a DNS server after France, Romania and Lithuania, the majority of visitors vanity fair 2011 will receive a DNS response in less than 50ms. Any visitor who came from the west coast of the US, it can wait for half a second, and from New Zealand - and the entire second.
Compared to an optimized website is charging for 1-2 seconds, 50ms DNS server response speed is sufficient. However, already in excess of 100ms noticeably hampered site reboots and becomes a problem. vanity fair 2011
It would be ideal to have a single DNS server in each country, but the world's still nothing. In order to have a sufficiently large DNS response rate to its visitors, choose the service provider who has at least one server in each continent, which comes from your visitors. vanity fair 2011 DNS server reliability
DNS servers according to network requirements must include at least two physically separate vanity fair 2011 servers. Most service providers vanity fair 2011 have at least 4 DNS servers, that they are not in one data center and arrange powerful enough hardware. In practice, all DNS servers networks operate reliably until their one to attack.
The biggest problem in the DNS server - DDoS attacks. During hundreds of thousands of computers infected with viruses without vanity fair 2011 stopping the DNS server sends queries, which can not handle such a large instantaneous vanity fair 2011 flow and becomes unavailable.
DDoS attacks are used to attack a variety of servers, but they share the DNS from the beginning vanity fair 2011 of 2013 until the end of that year, up from 13.1% to 50.1% in the first More than half of DDoS attacks directed to the DNS servers, because their job is no longer active tampering with absolutely vanity fair 2011 everything anyone need a domain name.
Every hour recorded 28 new DDoS attacks in the world 1, and the largest DDoS attack traffic since 2014 exceeds vanity fair 2011 400Gbps second By comparison, a simple hosting server is connected to the Internet channel 0,1Gbps. The largest Internet service provider in Lithuania TEO sells to 10Gbps Internet channels, and a total of themselves have bought 100Gbps international vanity fair 2011 channels. This means that if any of the Lithuanian Internet service provider would be offended by a large-scale DDoS attack, the available international channels "becomes blocked and services immediately become inaccessible outside of Lithuania.
In reality, Lithuania providers so far received only a much smaller scale attacks. But little ready and the necessary equipment neinvestavusius data centers and disrupts 6Gbps attacks (Business Gazette article). Therefore, to have at least one DNS server to a large global network of an Internet vanity fair 2011 service provider is required.
Most of the global DNS service providers to protect their servers from 50-100Gbps attacks. For the stable operation of the service, make sure that your DNS server owner is able to withstand at least the scale attacks. DNS server security
If the DNS server will return the wrong answer visitor, the visitor will go to the wrong server. In practice this does not happen accidentally. For example, if someone hacked into the bank to change the DNS server and the DNS zone settings to redirect all bank customers to your server with a fake website vanity fair 2011 and steal their credentials.
Each service vanity fair 2011 provider shall ensure the security of the DNS servers within its jurisdiction, vanity fair 2011 as well as all other types of servers. In most cases it is easier to break into the router's user or his computer and change their settings. Then given a visitor's computer will not DNS information from the real DNS server, and the fake, leading to a malicious site.