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ipconfig (standing for "Internet Protocol configuration") is a console application program of some computer operating systems that displays all current TCP/IP network configuration values and refreshes Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) settings. [1]
dig is a network administration command-line tool for querying the Domain Name System (DNS).. dig is useful for network troubleshooting and for educational purposes. [2] It can operate based on command line option and flag arguments, or in batch mode by reading requests from an operating system file.
In macOS, the ifconfig command functions as a wrapper to the IPConfiguration agent, and can control the BootP and DHCP clients from the command-line. Use of ifconfig to modify network settings in Mac OS X is discouraged, because ifconfig operates below the level of the system frameworks which help manage network configuration.
nslookup operates in interactive or non-interactive mode. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt (>).
The Name Service Switch (NSS) is a feature found in the standard C library of various Unix-like operating systems that connects a computer with a variety of sources of common configuration databases and name resolution mechanisms. [1]
Command Explanation netstat -a: Shows all sockets, both listening and non-listening, all protocols like TCP, UDP etc. netstat -at: Shows only TCP connections (-au shows only UDP connections) netstat -ant: Shows all TCP connections with no DNS resolution (show IP addresses instead). netstat -al: Shows only listening sockets. netstat -aep
The server software is shipped with a command line application dnscmd, [13] a DNS management GUI wizard, and a DNS PowerShell [14] package. In Windows Server 2012, the Windows DNS added support for DNSSEC, [ 15 ] with full-fledged online signing, with Dynamic DNS and NSEC3 support, along with RSASHA and ECDSA signing algorithms.
A receiving SMTP server wanting to verify uses the domain name and the selector to perform a DNS lookup. [8] For example, given the example signature above: the d tag gives the author domain to be verified against, example.net ; the s tag the selector, brisbane. The string _domainkey is a fixed part of the specification.