what is dns search

Tags: Server DNSDNS uses both UDP and TCP port 53 at the same time. This single application protocol uses two transmission protocols at the same time, which is an alternative in the TCP/IP stack. However, few people know under what circumstances DNS uses the two Protocols. If Wireshark, Sniffer, or tcpdump is used f

Recently found that the home wireless router Internet is very slow, some friends come to play a mobile phone connected to the Internet, but access to the IP are very normal, ping the site's domain name, found that the domain name can not be resolved. According to the accumulation of knowledge, can not resolve the domain name may be the problem of DNS, in the cmd input ipconfig/all, (please check the cmd co

Sometimes when we use a computer, we find that the network suddenly becomes slow, and we may clean up the DNS cache, but we find that the DNS cache is not clean, so what if your computer is a Win7 system and cannot clear the DNS c

Files to use:Configuring interface Information/etc/network/interfacesConfiguration content:Auto Eth0Iface eth0 inet StaticAddress 192.168.216.188Gateway 192.168.216.2Netmask 255.255.255.0Configure DNS/etc/resolvconf/resolv.conf.d/baseConfiguration content: NameServer 192.168.216.2To view DNS:/etc/resolv.confCommand:View System Network InformationIfconfigRestart Network Service/etc/init.d/networking restartT

DNS concurrently consumes UDP and TCP port 53 is generally accepted, this single application protocol uses two kinds of transport protocol in the case of the TCP/IP stack is also a kind of alternative. The following describes the conditions under which DNS is used in each of

servers with blocked IP addresses. Because the UDP protocol is used for domain name query, the server does not immediately realize that the host of the other party has been taken offline (or may also be related to the method of the electronic envelope IP address, and does not return an ICMP packet), and does not give up the query after the timeout. However, because the DNS server

After DNS compilation is complete, the system prompts "XNDOMAIN -- Linux Enterprise Application-Linux server application" during nslookup. The following is a detailed description. Attaches all the compilation content, and red indicates the modified items. The host name is linux, the

HostsThe Hosts file is a file that is responsible for fast resolution of IP addresses and domain names in the Linux system, and is stored in the/etc/directory in ASCII format. The Hosts file contains a mapping between the IP address and the host name, and also includes the host alias. in the absence of a domain name resolution server, all network programs on the

[Source] After Centos modifies DNS to restart or restarts the network service, the problem is lost. centosdns This article is copyrighted by mephisto and the blog Park. You are welcome to repost it, but you must keep this statement and provide the original article link. Thank you for your cooperation. Written by mephisto, SourceLinkReading directory Introductio

DNS is responsible for mapping domain names to IP addresses, which is the cornerstone of the entire Internet. DNS is important to us, and if your DNS is tampered with, then your network

In Linux, cache DNS resolution is used to speed up the response to the Internet-Linux Enterprise Application-Linux server application information. The following is a detailed description. When you use Firefox to browse a webpage, you will always see a prompt in the lower left corner at the beginning: "Parsing host xxx ..." It seems that the

These days I have been very careful and found that when I browsed the web page using Firefox, I always saw a prompt in the lower left corner at the beginning: "Parsing host xxx ..." It seems that it is waiting for the DNS server to resolve the domain name. It is idle, so I decided to make a DNS Cache to speed up the