Address Resolution Protocol - Revision history

Jnc: Chaos confusion fix

2023-12-12T16:14:42Z

Chaos confusion fix

Jnc: /* Background */ link MAC

2022-07-11T14:39:34Z

‎Background: link MAC

Jnc: /* Background */ move Ethernet address description to Ethernet

2022-07-11T02:42:39Z

‎Background: move Ethernet address description to Ethernet

Vaxorcist: /* Background */ Corrected link

2022-07-09T07:52:40Z

‎Background: Corrected link

Vaxorcist: /* Background */ Changed wording / formatting

2022-07-03T17:58:22Z

‎Background: Changed wording / formatting

Vaxorcist: /* Background */ MAC Address added

2022-07-03T17:31:09Z

‎Background: MAC Address added

Jnc: +cat

2021-11-06T12:28:33Z

+cat

Jnc: Still needs an outline of the basic protocol mechanism, but this is a good start

2021-10-27T08:52:06Z

Still needs an outline of the basic protocol mechanism, but this is a good start

New page

The '''Address Resolution Protocol''' (usually given as its acronym, '''ARP''') is a networking [[protocol]] which is used to translate from the [[address]]es used by the [[internetworking layer]] of a particular [[protocol suite|protocol family]] (e.g. [[Chaosnet]], or the [[Internet Protocol]] of [[TCP/IP]]) to those used by a particular [[physical network]] (e.g. [[Ethernet]]), in cases where a non-trivial [[mapping]] is required between the addresses used by the internet protocol, and the addresses used by the physical network.

==Background==

Originally, all physical networks had addresses which were relatively short (e.g. 24 [[bit]]s in the [[ARPANET]]; 8 bits in the [[Chaosnet]] [[local area network|LAN]]) and those were carried directly in the low order bits of the addresses of the internetworking layer of the particular protocol family.

With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.

==External links==

* [https://datatracker.ietf.org/doc/html/rfc826 An Ethernet Address Resolution Protocol] - protocol spec

[[Category: Networking]]

← Older revision		Revision as of 16:14, 12 December 2023
Line 1:		Line 1:
−	The '''Address Resolution Protocol''' (usually given as its acronym, '''ARP''') is a networking [[protocol]] which is used to translate from the [[address]]es used by the [[internetworking layer]] of a particular [[protocol suite\|protocol family]] (e.g. [[Chaosnet]], or the [[Internet Protocol]] of [[TCP/IP]]) to those used by a particular [[physical network]] (e.g. [[Ethernet]]), in cases where a non-trivial [[mapping]] is required between the addresses used by the internet protocol, and the addresses used by the physical network.	+	The '''Address Resolution Protocol''' (usually given as its acronym, '''ARP''') is a networking [[protocol]] which is used to translate from the [[address]]es used by the [[internetworking layer]] of a particular [[protocol suite\|protocol family]] (e.g. [[Chaosnet\|Chaos]], or the [[Internet Protocol]] of [[TCP/IP]]) to those used by a particular [[physical network]] (e.g. [[Ethernet]]), in cases where a non-trivial [[mapping]] is required between the addresses used by the internet protocol, and the addresses used by the physical network.

	==Background==		==Background==

← Older revision		Revision as of 02:42, 11 July 2022
Line 6:		Line 6:

	With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.		With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.
−
−	The 48-bit physical address of the Ethernet is known as the '''[[Media Access Control Address]]''' (short: '''MAC Address''' or just: '''MAC'''), sometimes '''Ethernet Address''' or '''Hardware Address''' (the last is rather misleading if not explicitly used related to Ethernet networking).

	==External links==		==External links==

@@ Line 7: / Line 7: @@
 With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.
-The 48-bit physical address of the Ethernet is known as the '''[[MAC Address|Media Access Control Address]]''' (short: '''MAC Address''' or just: '''MAC'''), sometimes '''Ethernet Address''' or '''Hardware Address''' (the last is rather misleading if not explicitly used related to Ethernet networking).
+The 48-bit physical address of the Ethernet is known as the '''[[Media Access Control Address]]''' (short: '''MAC Address''' or just: '''MAC'''), sometimes '''Ethernet Address''' or '''Hardware Address''' (the last is rather misleading if not explicitly used related to Ethernet networking).
 ==External links==

@@ Line 7: / Line 7: @@
 With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.
-The 48-bit physical address of the Ethernet is known as the [['''MAC Address|Media Access Control Address''']] (short: MAC Address or just: MAC), sometimes '''Ethernet Address''' or '''Hardware Address''' (rather misleading).
+The 48-bit physical address of the Ethernet is known as the '''[[MAC Address|Media Access Control Address]]''' (short: '''MAC Address''' or just: '''MAC'''), sometimes '''Ethernet Address''' or '''Hardware Address''' (the last is rather misleading if not explicitly used related to Ethernet networking).
 ==External links==

← Older revision		Revision as of 17:31, 3 July 2022
Line 6:		Line 6:

	With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.		With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.
		+
		+	The 48-bit physical address of the Ethernet is known as the [['''MAC Address\|Media Access Control Address''']] (short: MAC Address or just: MAC), sometimes '''Ethernet Address''' or '''Hardware Address''' (rather misleading).

	==External links==		==External links==

@@ Line 5: / Line 5: @@
 Originally, all physical networks had addresses which were relatively short (e.g. 24 [[bit]]s in the [[ARPANET]]; 8 bits in the [[Chaosnet]] [[local area network|LAN]]) and those were carried directly in the low order bits of the addresses of the internetworking layer of the particular protocol family.
-With the advent of the 10 Mbit/second Ethernet, which had 48-bit physical addresses (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.
+With the advent of the 10 Mbit/second Ethernet, which had 48-bit [[Media Access Control Address|physical addresses]] (so that all Ethernet [[network interface]]s could be assigned a guaranteed-unique physical address at manufacturing time), this was no longer true. Use of static, manually-configured tables to hold the required mappings was clearly infeasible, so ARP was designed.
 ==External links==

← Older revision		Revision as of 12:28, 6 November 2021
Line 11:		Line 11:
	* [https://datatracker.ietf.org/doc/html/rfc826 An Ethernet Address Resolution Protocol] - protocol spec		* [https://datatracker.ietf.org/doc/html/rfc826 An Ethernet Address Resolution Protocol] - protocol spec

		+	[[Category: Network Protocols]]
	[[Category: Networking]]		[[Category: Networking]]