?Protocol numbers Essay

Published: 2021-06-11 18:05:03
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Category: Communication

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Protocol Numberss are used to configure firewalls, routers, and proxy waiters. In Internet Protocol version 4 ( IPv4, Request for Comments [ RFC ] 791I ) , the protocol figure can be found in the Protocol field of an IP header.ICMP Echos are used largely for trouble-shooting. When there are 2 hosts which have communicating jobs, a few simple ICMP Echo petitions will demo if the 2 hosts have their Transmission control protocol/internet protocol tonss configured right and if there are any jobs with the paths packages are taking in order to acquire to the other side ICMP Echo Information
Type Name ReferenceEcho Reply [ RFC792 ]
CodesNo Code
1 Unassigned [ JBP ]
2 Unassigned [ JBP ]
3 Destination Unreachable [ RFC792 ]
Codes0 Net Unapproachable1 Host Unapproachable2 Protocol Unapproachable3 Port Unapproachable4 Fragmentation Needed and Don’t Fragment was Set5 Source Route Failed6 Destination Network Unknown7 Destination Host Unknown8 Source Host Isolated9 Communication with Destination Network is Administratively Prohibited10 Communication with Destination Host is Administratively Prohibited11 Destination Network Unreachable for Type of Service12 Destination Host Unreachable for Type of Service13 Communication Administratively Prohibited [ RFC1812 ]14 Host Precedence Violation [ RFC1812 ]15 Precedence cutoff in consequence [ RFC1812 ]
4 Source Quench [ RFC792 ]CodesNo Code
5 Redirect [ RFC792 ]
CodesRedirect Datagram for the Network ( or subnet )1 Redirect Datagram for the Host2 Redirect Datagram for the Type of Service and Network3 Redirect Datagram for the Type of Service and Host
6 Alternate Host Address [ JBP ]
CodesAlternate Address for Host
7 Unassigned [ JBP ]
8 Echo [ RFC792 ]
CodesNo Code
9 Router Advertisement [ RFC1256 ]
Codes0 No Code
10 Router Selection [ RFC1256 ]
Codes0 No Code
11 Time Exceeded [ RFC792 ]
Codes0 Time to Populate exceeded in Theodolite1 Fragment Reassembly Time Exceeded
12 Parameter Problem [ RFC792 ]
Codes0 Pointer indicates the mistake1 Missing a Needed Option [ RFC1108 ]2 Bad Length
13 Timestamp [ RFC792 ]
Codes0 No Code
14 Timestamp Reply [ RFC792 ]
Codes0 No Code
15 Information Request [ RFC792 ]
Codes0 No Code
16 Information Reply [ RFC792 ]
Codes0 No Code
17 Address Mask Request [ RFC950 ]
Codes0 No Code
18 Address Mask Reply [ RFC950 ]
Codes1 No Code
Service names are assigned on a first-come, first-served procedure, as documented in [ RFC6335 ] .
Port Numberss are assigned in assorted ways, based on three scopes: System Ports ( 0-1023 ) , User Ports ( 1024-49151 ) , and the Dynamic and/or Private Ports ( 49152-65535 ) ; the difference uses of these scopes is described in [ RFC6335 ] . System Ports are assigned by IETF
procedure for standards-track protocols, as per [ RFC6335 ] . User Ports are assigned by IANA utilizing the “IETF Review” procedure, the “IESG Approval” procedure, or the “Expert Review” procedure, as per [ RFC6335 ] . Dynamic Ports are non assigned.
The enrollment processs for service names and port Numberss are described in [ RFC6335 ] .
Assigned ports both System and User ports SHOULD NOT be used without or prior to IANA enrollment.

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