your current TCP/IP information,including your address,DNS server addresses,adapter type and so on.For example,if you all this information about your host simply by entering ipconfig \all into the Command Prompt,as shown in the following screenshot. 回Command Prompt :\>ipconfig /all indows IP Configuration Dns Suffix:::日 USG11631-ZMMQA6 Hybrid .No adapter Local Area Connection 0889-6B-18-68-99 ation Enabled Lease Expirs ::Hend出：Auut38:283B8P删 ipconfig is also very useful for managing the DNS information stored in your host.In Section 2.5 we learned that a host can cache DNS records it recently obtained.To see these cached records,after the prompt C:\>provide the following command: ipconfig /displaydns Each entry shows the remaining Time to Live(TTL)in seconds.To clear the cache,enter ipconfig /flushdns Flushing the DNS cache clears all entries and reloads the entries from the hosts file your current TCP/IP information, including your address, DNS server addresses, adapter type and so on. For example, if you all this information about your host simply by entering ipconfig \all into the Command Prompt, as shown in the following screenshot. ipconfig is also very useful for managing the DNS information stored in your host. In Section 2.5 we learned that a host can cache DNS records it recently obtained. To see these cached records, after the prompt C:\> provide the following command: ipconfig /displaydns Each entry shows the remaining Time to Live (TTL) in seconds. To clear the cache, enter ipconfig /flushdns Flushing the DNS cache clears all entries and reloads the entries from the hosts file