what is dns in networking

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

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

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

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

Question: How to access the Internet through the server Perform operations on the server's Internet and Internet (the operation sequence is adjustable ): (1) inode connection (2) It is automatically closed after the startmynetwork. Sh terminal runs the command. Question: Which script files have been written by myself, under which paths are there, and what opera

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

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

Small white is a loyal user of Emacs, on the CentOS server also need to compile and install a Emacs for their own use. Because of the use of a lot of Emacs plug-ins, each time it is very slow to start, almost 5s or so to open a file (let everyone mistakenly think server configuration sucks it). In the speed of opening the file with Vim some gap, vim open file is

the network service. In"/etc/resolv. conf "the configured nameserver information is also lost.Processing Find the corresponding Nic configuration file "/etc/sysconfig/network-scripts/ifcfg-eth Here, For example, if the first network adapter in the system is eth0, its configuration file is/etc/sysconfig/network-scripts/ifcfg-eth0.vim /etc/sysconfig/network-script

How is Dynamic DNS resolution done? This question is not related to PHP, but I don't know which section is appropriate. --------------------------------------------- If you ping some large websites, such as YOUKU.COM,GOOGLE.COM.HK, you will see different IPs after each resolution. This

name (DNS) on a Dynamic Web page to find the corresponding IP. dynamically generates HTML tables. Quickly establish a "customer reply" system so that Web visitors can send a letter from the Web page to the webmaster. Let the Web page can record the behavior of the Web browser, that is, log. The 6th to 13th chapters, we will introduce some very important, very common, but more complex library suite use meth

, serial line, etc.) to transmit data. Protocols in TCP/IP Here's a brief description of what the protocols in TCP/IP are capable of, and how they work: 1. Ip Internet Protocol IP is the heart of TCP/IP and the most important protocol in the network layer. The IP layer receives packets from a lower level (network interface layer such as an Ethernet device driver) and sends the packet to a higher--

distribution In short, when the site opened CDN, users visit the site, not directly to the site of the original server, but a server distributed to your nearest server node, because the server close to you, so access speed or download speed will be faster. Do you remember the previous introduction of the computer Pepsi network to set up DNS? Also mentioned in the DNS server address must fill out the near