what is dns cache

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

During domain name search through DNS, the specified domain name may be found through multiple intermediate DNS servers. Therefore, it is very expensive to search for a domain name on the DNS server. In Java, DNS cache is provided to alleviate this

1. Clear DNS cache in Linux There are two methods to implement DNS caching in Linux:One is to use DNS CacheProgramNscd (Name Service cache Daemon) is responsible for managing DNS cache.One way to implement DNS caching is to use bind to set up the

Linux DNS cache, NSCD serviceThese two days to do stress test, found that with webbench pressure domain name than the pressure IP address several times slower, and pressure domain name when nginx concurrency is also very low. Repeated tests many

During the stress tests of the linux dns cache and NSCD service over the past two days, it was found that using webbench to press a domain name is several times slower than that of an IP address, and the nginx concurrency is also low when the domain

How to empty the DNS cache method/Command How to empty the DNS cache under Microsoft Windows In Microsoft Windows, your can use the command Ipconfig/flushdns to flush the DNS resolver cache. Under Microsoft Windows, you can use command

DNS Cache COMMANDS IN WINDOWS Refresh DNS Cache: C:/> ipconfig/flushdnsWindows IP configurationSuccessfully flushed the DNS resolver cache.   View DNS Cache: C:/> ipconfig/displaydns Disable DNS Cache: C:/>

During the stress tests of the linux dns Cache and NSCD service over the past two days, it was found that using webbench to press a domain name is several times slower than that of an IP address, and the nginx concurrency is also low when the domain

1, the role of Ipconfig/flushdns Ipconfig/flushdns This is used to clear the DNS cache. When accessing a Web site, the system will read the IP address of the domain name from the DNS cache, and find the Hosts file in the system when it is not found,

Refreshing the DNS cache only needs to be refreshed by using the command to flush the DNS cache. So what is the command to flush the DNS cache? is "Ipconfig/flushdns". The specific steps are as follows: First, hold down the keyboard win+r key

Sometimes you may encounter such a situation, the computer suddenly can not be on the net, or there are some sites could not open the situation, but other sites may open. A lot of this is due to DNS cache latency. Using commands to clean up DNS

How to refresh the local DNS CacheI often ask if domain name resolution does not take effect immediately. Why is it still the original one? The answer is that there is a resolution cache in the local DNS. After the computer accesses the domain name

Three ways XP cannot clear the DNS cache Method one: Flush DNS with repair local connection 1, simple to difficult, first use the simplest way to refresh the DNS cache, is to repair the local connection, in the lower right corner of the desktop

Today, I found a domestic machine with abnormal traffic. I found that the DNS Cache service running on this machine was used as an amplification lever for attacks. Let's take a look at it. When a traffic exception is detected, check the TCP session

Some time ago, I changed the server to using ipfilter + ipnat + dhcp -- ipfilter + ipnat packet filtering, forwarding, and DHCP server architecture notes under freebsd5.4. However, I recently felt that the server is always offline, I opened another

Problem Description: When you right-click Local Area connection to select Repair, you are prompted that Windows cannot complete the fix problem because the following actions cannot complete the cleanup of the DNS cache ... "error, as shown in the

Commands used to refresh DNS cache are often used but are often forgotten. record it here to be prepared. hahaha, this may also be a cup of opportunity for many attacking lions and programmers. Run the command ipconfig/displaydns to check the dns

How to view the contents of the DNS cache, in fact, is simply a command prompt. The steps are as follows: (1) Run the command prompt as an administrator. Attention (2) at the command prompt, type Ipconfig/displaydns. Then it pops up a whole

To refresh the DNS cache, you need to restart nscddaemon: 1. to restart nscddaemon, enter/etc/rc in the command line window (terminal. d/init. d/nscdrestart2. after the command is executed, your DNS cache will be refreshed. For a newer Linux version,

DNS cache poisoning attacks refer to attacks that trick the DNS server into believing the authenticity of forged DNS responses. This type of attack aims to redirect victims who depend on this DNS server to other addresses, for example, redirect all