Protocol numbers Essay

Protocol rime atomic number 18 used to configure firewalls, routers, and proxy servers. In Internet Protocol indication 4 (IPv4, demand for Comments RFC 791I), the protocol number can be build in the Protocol field of an IP header.ICMP Echos are used for the most part for troubleshooting. When there are 2 hosts which have communication problems, a some simple ICMP Echo requests will show if the 2 hosts have their transmission control protocol/IP stacks configured correctly and if there are any(prenominal) problems with the routes packets are taking in order to get to the other face ICMP Echo tuitionType Name ReferenceEcho suffice RFC792 enrollsNo Code1 Unassigned JBP2 Unassigned JBP3 conclusion unapproachable RFC792Codes0 Net Unreachable1 host Unreachable2 Protocol Unreachable3 Port Unreachable4 Fragmentation Needed and Dont Fragment was posit5 Source Route Failed6 Destination Network unacknowledged7 Destination armament Unknown8 Source legions Isolated9 Communication with Destination Network isadministratively prohibit10 Communication with Destination Host isAdministratively Prohibited11 Destination Network Unreachable for Type of Service12 Destination Host Unreachable for Type of Service13 Communication Administratively Prohibited RFC181214 Host precedence Violation RFC181215 Precedence cutoff in effect RFC18124 Source Quench RFC792CodesNo Code5 direct RFC792CodesRedirect 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 Host6 Alternate Host Address JBPCodesAlternate Address for Host7 Unassigned JBP8 Echo RFC792CodesNo Code9 Router Advertisement RFC1256Codes0 No Code10 Router Selection RFC1256Codes0 No Code11 Time Exceeded RFC792Codes0 Time to Live exceeded in Transit1 Fragment Reassembly Time Exceeded12 Parameter Problem RFC792Codes0 Pointer indicates the error1 Missing a Required woof RFC11082 Bad Length13 Timestamp RF C792Codes0 No Code14 Timestamp say RFC792Codes0 No Code15 Information Request RFC792Codes0 No Code16 Information resolve RFC792Codes0 No Code17 Address Mask Request RFC950Codes0 No Code18 Address Mask Reply RFC950Codes1 No CodePORT NUMBERSService name calling are assigned on a first-come, first-served process, as documented in RFC6335.Port numbers are assigned in various ways, ground on three ranges System Ports (0-1023), drug user Ports (1024-49151), and the energetic and/or mystical Ports (49152-65535) the difference uses of these ranges is described in RFC6335. System Ports are assigned by IETFprocess for standards-track protocols, as per RFC6335. User Ports are assigned by IANA apply the IETF Review process, the IESG Approval process, or the Expert Review process, as perRFC6335. Dynamic Ports are not assigned.The registration procedures for service names and port numbers are described in RFC6335.Assigned ports both System and User ports SHOULD NOT be used without or prior to IANA registration.