Broadband-internet information

Icmp protocol - internet be in command of implication protocol - broadband-internet


The Internet Be in charge of Letter Protocol communicates errors letters among systems that compel attention. This error is not commonly at the user level, the error is handled by the appliance layer. In the OSI Allusion model, ICMPs are commonly careful part of the IP layer.

To put to plain and simple, ICMP letters are sent "behind the scenes" to your applications to tell them if there is a conundrum with the link or convey of data. These e-mail tell your concentration to alter what they are doing, alteration how they are conveyance and chiefly give them an error code on how they can lucratively fix their problems.

ICMPs' are sent in a average IP datagram, this datagram contains an IP heading of twenty (20) bytes and then the ICMP message. There are fifteen principles for the type field of the datagram which identifies the type of ICMP message. The "code" portion of the datagram specifies the form of the "type" even further. This sounds a bit mystifying at first, but you have two major categories, the basic "problem," and then a derivative more in depth look at that problem. This will all make more sense when you look at in a row below.

Type 0, code 0 - echo reply

Type 3 (destination unreachable)
Type 3, code 0 - exchange ideas unreachable
Type 3, code 1 - host unreachable
Type 3, code 2 - protocol unreachable
Type 3, code 3 - port unreachable
Type 3, code 4 - fragmention needed
Type 3, code 5 - font route failed
Type 3, code 6 - destination association unknown
Type 3, code 7 - destination host unknown
Type 3, code 8 - find host isolated
Type 3, code 9 - destination exchange ideas organizationally prohibited
Type 3, code 10 - destination host organizationally prohibited
Type 3, code 11 - arrangement inaccessible for TOS
Type 3, code 12 - host out-of-the-way for TOS
Type 3, code 13 - announcement managerially prohibited by filtering
Type 3, code 14 - host precedence violation
Type 3, code 15 - precedence bring to an end in effect

Type 4, code 0 - font quench

Type 5 (redirects)
Type 5, code 0 - redirect for network
Type 5, code 1 - redirect for host
Type 5, code 2 - redirect for type of assistance and network
Type 5, code 3 - redirect for type of ceremony and host

Type 8, code 0 - echo request

Type 9, code 0 - router advertisement

Type 10, code 0 - router solicitation

Type 11 (time exceeded)
Type 11, code 0 - time to live (TTL) equals 0 all through transit
Type 11, code 1 - time to live (TTL) equals 0 for the duration of reassembly

Type 12 (parameter problem)
Type 12, code 0 - IP heading bad
Type 12, code 1 - necessary decision missing
Type 13, code 0 - timestamp request

Type 14, code 0 - timestamp reply

Type 15, code 0 - in rank request

Type 16, code 0 - in order reply

Type 17, code 0 - concentrate on mask request

Type 18, code 0 - concentrate on mask reply

As you can see from the above information, the basic "type" groups are the main problem, with the "code" additional specifying the problem. Much of this stuff doesn't make sense to the human end-user anyway, but it means a lot to the software developers who use these desires to fix troubles in their coding.

ICMP's are a nice after the scenes assistant that are good to have their, but be thankful you don't actually have to deal with them. For even more exhaustive in rank on the Internet Be in command of Implication Protocol (ICMP) the protocol is definite in RFC 792.

Ken Dennis
http://KenDennis-RSS. homeip. net/

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