Schlagwort-Archive: tool

RFC 3912: WHOIS Protocol Specification

Network Working Group                                          L. Daigle
Request for Comments: 3912                                VeriSign, Inc.
Obsoletes: 954, 812                                       September 2004
Category: Standards Track

                        Specification
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RFC 1393: Traceroute Using an IP Option

Network Working Group G. Malkin
Request for Comments: 1393 Xylogics, Inc.
January 1993

Using an Option
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What is whois?

ist a for retrieving information about -addresses and internet domains. It was defined in RFC 3912. These information include statements of ownership and responsibility.

Some operating systems deliver a command line for using this information as well.

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What is traceroute?

is a for analysis, and display the route to a destination host. It was specified in RFC 1393.

The tools sends packages with increasing TTL (Time-To-Live) Value to the host. A router discards packages with TTL 1, otherwise reduces the TTL-Value before forwarding.

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What is ping?

ist ein for analysis, that displays the availability of the destination host and the signal propagation delay to reach this host.

For this the tool sends several ICMP-Packages (echo request, “ping”) to the host, that should respond with the ICMP-Package (echoreply, “pong”) to show its availability.

Is the host not available, the responsible router responds with “network unreachable” or “host unreachable”.

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