Schlagwort-Archive: protocol

RFC 791: Internet Protocol

:  791

                           INTERNET 

                         DARPA INTERNET PROGRAM

                          SPECIFICATION
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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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What is IPv6 (Internet Protocol Version 6)?

The Internet Version 6 is the future network used for transmitting data over a packet-oriented network. It was specified in RFC 2460 and will replace the currently used IPv4. IPv6 is architecturally compatible with IPv4, so it is expected that most of the services build on continue to function without having to make significant adjustments.

In Networks source and destination and all intermediate stations need to have unique IP addresses. The currently used form of IPv4 addresses are 4 bytes (32 bits) wide, and so allow about 232 different addresses. Highly increased demand and need to, make these addresses short in supply.

IPv6 addresses are 16 bytes (128 bits) wide, making some 2128. Hence a sufficient number of addresses for the future becomes available.

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What is IPv4 (Internet Protocol Version 4)?

The Internet version 4 is the currently used network for transmitting data over a packet-oriented network. It was specified in RFC 791 The data to be transmitted is broken down into packets and routed over the network. Each packet can take a different route.

Source and destination and all intermediate stations to have this unique addresses with a width of four bytes (32 bits). The common specification is in the dot notation: a.b.c.d, where a through d are numbers between 0 and 255. This leads to a maximum number of about 4.3 billion addresses.

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What is DHCP (Dynamic Host Configuration Protocol)?

stands for Dynamic Host Configuration . It is used to supply participating network devices automatically and dynamically with the required configuration, especially the IP address.

The assignment of addresses using DHCP requires a DHCP server. This can be a separate device, but is often a program or system service on a computer in the network. This server is started at the first or runs continuously. A network can be managed by multiple DHCP servers.

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