421 MISDIRECTED REQUEST

The request was aimed at a server that can’t create a reaction. This can be sent by a server that isn’t arranged to deliver reactions for the blend of plan and authority that are remembered for the request URI. 

Customers accepting a 421 Misdirected Request reaction from a server MAY retry the request – regardless of whether the request technique is idempotent or not – over an alternate association. This is conceivable if an association is reused or if an elective help is chosen ALT-SVC. 

This status code MUST NOT be created by intermediaries. 

A 421 reaction is cacheable as a matter of course, i.e., except if generally demonstrated by the strategy definition or express reserve controls.

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