Internetworking layer - Revision history

Jnc: /* See also */ Chaos confusion fix

2023-12-12T16:10:55Z

Jnc: /* See also */ Add some others

2019-02-17T17:06:53Z

Jnc: better cat

2018-12-22T13:33:17Z

better cat

← Older revision		Revision as of 13:33, 22 December 2018
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	* [[Internet Protocol]] - the internetworking layer in [[TCP/IP]]		* [[Internet Protocol]] - the internetworking layer in [[TCP/IP]]

	[[Category: Networking]]		[[Category: Networking Basics]]

Jnc: Missed a few...

2018-06-14T01:28:52Z

Missed a few...

← Older revision		Revision as of 01:28, 14 June 2018
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	An '''internetworking layer''' (or '''internetwork layer''', for short) is the key [[protocol]] used in the [[protocol suite]] used on an [[internetwork]] ('internet', for short - note the lack of the capital letter used for ''the'' [[Internet]]); it offers direct [[datagram]] carriage across the entire internet.		An '''internetworking layer''' (or '''internetwork layer''', for short) is the key [[protocol]] used in the [[protocol suite]] used on an [[internetwork]] ('internet', for short - note the lack of the capital letter used for ''the'' [[Internet]]); it offers direct [[datagram]] carriage across the entire internet.

	This layer/protocol usually provides an unreliable service, one which makes no guarantees that [[packet]]s carried by it will not be damaged, ~~delayed~~, ~~duplicated or~~ re-ordered.		This layer/protocol usually provides an unreliable service, one which makes no guarantees that [[packet]]s carried by it will not be delayed, damaged, duplicated, re-ordered, or lost completely.

	This lack of any delivery guarantees makes the job, and implementation, of [[router]]s, the [[packet switch]]es that form the lowest layer of the internet's infrastructure (along with the [[physical network]]s that connect them), '''''much''''' simpler.		This lack of any delivery guarantees makes the job, and implementation, of [[router]]s, the [[packet switch]]es that form the lowest layer of the internet's infrastructure (along with the [[physical network]]s that connect them), '''''much''''' simpler.

	It does mean that it is the job of the protocol(s) above the internetworking layer/protocol to ensure reliable data carriage on an [[end to end]] basis (if the application using that protocol needs such); they do so using [[sequence number]]s, [[timeout]]s, and [[~~retransmission~~]].		It does mean that it is the job of the protocol(s) above the internetworking layer/protocol to ensure reliable data carriage on an [[end to end]] basis (if the application using that protocol needs such); they do so using [[checksum]]s, [[sequence number]]s, [[acknowledgement]]s, [[timeout]]s, and [[re-transmission]].

	Each individual physical network has a protocol which specifies how packets are carried from one interface to that network to another; these protocols will vary from network type to network type. The internetworking layer serves to insulate everything connected to the internet from these variations; it is the same for all hosts and routers throughout the internet.		Each individual physical network has a protocol which specifies how packets are carried from one interface to that network to another; these protocols will vary from network type to network type. The internetworking layer serves to insulate everything connected to the internet from these variations; it is the same for all hosts and routers throughout the internet.
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	==See also==		==See also==

	* [[Internet Protocol]] - the ~~internetwork~~ layer in [[TCP/IP]]		* [[Internet Protocol]] - the internetworking layer in [[TCP/IP]]

	[[Category: Networking]]		[[Category: Networking]]

Jnc: A decent start

2018-06-13T20:40:58Z

A decent start

New page

An '''internetworking layer''' (or '''internetwork layer''', for short) is the key [[protocol]] used in the [[protocol suite]] used on an [[internetwork]] ('internet', for short - note the lack of the capital letter used for ''the'' [[Internet]]); it offers direct [[datagram]] carriage across the entire internet.

This layer/protocol usually provides an unreliable service, one which makes no guarantees that [[packet]]s carried by it will not be damaged, delayed, duplicated or re-ordered.

This lack of any delivery guarantees makes the job, and implementation, of [[router]]s, the [[packet switch]]es that form the lowest layer of the internet's infrastructure (along with the [[physical network]]s that connect them), '''''much''''' simpler.

It does mean that it is the job of the protocol(s) above the internetworking layer/protocol to ensure reliable data carriage on an [[end to end]] basis (if the application using that protocol needs such); they do so using [[sequence number]]s, [[timeout]]s, and [[retransmission]].

Each individual physical network has a protocol which specifies how packets are carried from one interface to that network to another; these protocols will vary from network type to network type. The internetworking layer serves to insulate everything connected to the internet from these variations; it is the same for all hosts and routers throughout the internet.

Since usually there are also a number of different protocols, providing different services, running on top of the internetwork layer, the internetwork layer is thus spoken of as being the 'waist' in the 'hour-glass' of that protocol suite. It is the one indispensable protocol that every node in the internet must understand and use.

==See also==

* [[Internet Protocol]] - the internetwork layer in [[TCP/IP]]

[[Category: Networking]]

← Older revision		Revision as of 16:10, 12 December 2023
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	* [[PARC Universal Packet]]		* [[PARC Universal Packet]]
	* [[Internetwork Datagram Protocol]] - the internetworking layer in [[Xerox Network Services]]		* [[Internetwork Datagram Protocol]] - the internetworking layer in [[Xerox Network Services]]
	* [[~~CHAOSnet~~]]		* [[Chaosnet\|Chaos protocol]]

	[[Category: Networking Basics]]		[[Category: Networking Basics]]

← Older revision		Revision as of 17:06, 17 February 2019
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	* [[Internet Protocol]] - the internetworking layer in [[TCP/IP]]		* [[Internet Protocol]] - the internetworking layer in [[TCP/IP]]
			* [[PARC Universal Packet]]
			* [[Internetwork Datagram Protocol]] - the internetworking layer in [[Xerox Network Services]]
			* [[CHAOSnet]]

	[[Category: Networking Basics]]		[[Category: Networking Basics]]