cloudflare dns down

ADSL modem VPI, VCI, and DNS information in various regionsGuangxi 0 35 DNS 202.103.224.68Beijing 0 35 DNS 202.106.196.115Guangdong Zhongshan 0 35 DNS: 202.96.128.68Hunan 0 35, DNS: 211.98.2.4Fujian, 0 200, DNS: 202.101.98.55 and

DNS domain name resolution The purpose of the domain name resolution is to convert the website name that users use to the TCP/IP protocol, and hostname is just convenient for people to remember, after all, IP is a pure digital address to the user is very unfriendly. However, when using TCP/IP communication, the computer is implemented through the IP address +port port number, so when we type a host name in the browser, we eventually need to convert

DNS is an application-level protocol, and DNS provides a mechanism for translating a human-readable hostname or domain name into a computer or network-readable digital address, making it possible for the wide application of the interconnection network. I. Basic concepts related to DNS (1) Domain name and top-level domain 1) Domain name Domain name is typically t

In actual application, DNS resolution errors may occur, that is, when we access a domain name, it cannot be resolved to an IP address, however, you can directly enter the website IP address for normal access, which is caused by a DNS resolution failure..Common Causes of DNS failure include:The domain name itself has expired or has been stopped;The

Code 9527---DNS Protocol In Zhou xingchi's movie Tang bohu's qiuxiang, As soon as Zhou xingchi entered Washington, he was forced to add a code 9527. From then on, Washington started to call the main character 9527, rather than his name. Domain name is the IP address code. A domain name generally consists of characters. For humans, domain names composed of characters, such as www.yahoo.com, are easier to remember than IP addresses composed of pure n

What is DNS tunnel? DNS tunnel is the DNS tunnel. The DNS query process is used to establish a tunnel and transmit data. Why use DNS tunnel? When you are in a hotel, airport or other public place, there is usually a Wi-Fi signal, but when you visit a website, such as _______

From: http://blog.csdn.net/cz_hyf/archive/2006/02/19/603022.aspx If a user node wants to obtain the corresponding "dpt1The IP address of. SEU. edu. cn. The processing of this node is as follows:1) send a "Answer" request to the local DNS server. To improve work efficiency, use the connectionless datagram service. If the local DNS server knows the corresponding dpt1. Seu. edu. if the local

1. What is DNSDNS: Domain Name Service, which is a hierarchical computer and network Service naming system that implements name resolution (HOSTNAMEDNS uses the C/s architecture, and the service listens on port 53rd of the host's tcp/udp. Transport Layer protocol UDP is used for domain name resolution, TCP for zone transferLocal name resolution file: Hosts (host limited time available)/etc/hosts%windows%/system32/drivers/etc/hosts2.dns ArchitectureA t

First, the experimental simulation environment:Zhuyu company has a DNS server, because the DNS server is older, ready to migrate to a new DNS server (DNS backup can do so).Legacy DNS Server:Host name: Test-zhuad IP Address: 192.168.10.30New

DNS stands for the DomainNameSystem domain name resolution system. In general, DNS is a resolution service that helps users find the corresponding names and IP addresses on the Internet. To make it easier to use network resources, DNS provides a method to associate a computer or service name with an IP address. The name must be easier to understand and remember t

Linux Study Notes-DNS server settings　 Recommender: sheke Information Release Date: Background:---- The company uses a leased line to connect to Chinanet and obtains a section of class c ip address space (for example, 16). At the same time, it applies to chinanic for the Company domain name yourdomain.com, And now sets up a machine as the DNS server, it is also set as a firewall.Obje

# DNS Server > D is the region.N is the nameS is a service ### DNS services > 1. cache Domain Name ServerYou can find the domain name resolution for you, but it cannot be resolved.Go to the public network to find the real Domain Name Server, go to the domain name resolution, after you come back, put it in your own cache, it is for you, you are requesting the same data it has > 2. Primary Domain Name Resolut

How to empty the DNS cache for LinuxI. Empty DNS cache under Linux There are usually two ways to implement a DNS cache implementation under Linux:One is to manage the DNS cache with the DNS cache program NSCD (Name Service cache daemon).One way to implement

Network communication is mostly based on TCP/IP, while TCP/IP is based on IP address, so the computer can only recognize the IP address such as "202.96.134.133" when communicating on the network, but cannot know the domain name. We can't remember sites with more than 10 IP addresses, so when we visit the site, more is in the browser address bar to enter the domain name, you can see the required page, this is because there is a call "DNS server" comput

New features provided by DNSSupports Active Directory AD)Unlike NT 4.0, the domain name of the Active Directory in Windows 2000 Server adopts a DNS name similar to that in the Internet, and the DNS is integrated into the design and implementation of the Active Directory. If the Active Directory is installed on the Server, Windows 2000 Server automatically installs and configures the

In the actual application process may encounter the problem of DNS parsing errors, that is, when we access a domain name can not be completed to resolve the work of the IP address, and the direct input of the Web site IP can be normal access, this is because of DNS resolution failure caused. The probability of this phenomenon is relatively large, so this article will be from the beginning of zero to teach r

DNS: domainnamesystem recursive query: you can obtain the final result iterative query after a query: you need to perform multiple queries to obtain the final result. Generally, the application method on the Internet is local recursion, partial Internet iteration. All DNS do not know where the other DNS is, but all know... DN