Isolating and tracking and software and hardware problems.

The recipient computers then sends back a response from a gate away or host (Glenn, 2011). Pinging also includes sending of an echo request to the recipient computer, it also sends an Internet Control Message Protocol (ICMP). It also serves to measure the round-trip time for information sent from a sender to a recipient computer. Ping can be described as an administration utility of a computer network that is applied testing how reachable a host is on an Internet Protocol network. NB: if indicated in the.nslookuprc file the directory of the name user’s, the set subcommands srchlist, domain, defname and search options may impact the activity of the non-interactive mode (Belohlavek, 2005). The name server parameter looks up information of the indicated host name server or the default name server, this is so in the non-interactive mode by using its commands. The internet address or the name of the server in this case is optional. Non-interactive mode is executed when the initial argument is the internet address or the name of the host that is being searched. Alternatively, the option of the set subcommand may be indicated in the.nslookuprc file home directory of the user’s (Mattord, 2009). the set command, the subcommands are indicated on the command line should come after the nslookup command arguments. The – (negative sign) brings into play a subcommand that is considered optional (Option… variable). In the event that there are no arguments indicated, the tool queries the default name server. The command (nslookup) enters works through the interactive mode when no arguments are stated, or when the in itial argument is a – (negative sign) and the following argument is the server’s internet address name or the host name. While the non-interactive mode prints the information requested and the name of the specified domain or host (Mattord, 2009). The interactive mode is open and enables one to query the name servers for details concerning the various domains and hosts, or print an inventory hosts that are contained in a domain.

Nslookup uses two modes when querying the Domain Name Server, that is, the interactive mode and the non-interactive mode.

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