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Operating Systems Solaris ARP Cache
# 8  
Old 06-30-2007
Quote:
Originally Posted by Neo
No, that is not actually correct.

If the IP address of the destination is on the same LAN segment as the origin, then when you send the first packet to that designation, the ARP tables on that LAN segment will update.

However, if your destination is 2 hops away, then there will be no ARP entry for the destination address.

ARP is for mapping IP address to MAC addresses for LAN traffic, not for IP routing.

Just doing a DNS lookup will not update an ARP table.

For example, right now you sit down and you want to visit www.unix.com .
There is no ARP entry on your server for www.unix.com because your computer is not on the same LAN segment as www.unix.com.

Is this clear now?
Yes, thanks to both of you.
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cache::object

Cache::Object(3pm)					User Contributed Perl Documentation					Cache::Object(3pm)

NAME

       Cache::Object -- the data stored in a Cache.

DESCRIPTION

       Object is used by classes implementing the Cache interface as an object oriented wrapper around the data.  End users will not normally use
       Object directly, but it can be retrieved via the get_object method on the Cache::Cache interface.

SYNOPSIS

	use Cache::Object;

	my $object = new Cache::Object( );

	$object->set_key( $key );
	$object->set_data( $data );
	$object->set_expires_at( $expires_at );
	$object->set_created_at( $created_at );

METHODS

       new(  )
	   Construct a new Cache::Object.

PROPERTIES

       (get|set)_accessed_at
	   The time at which the object was last accessed.  Various cache implementations will use the accessed_at property to store information
	   for LRU algorithms.	There is no guarentee that all caches will update this field, however.

       (get|set)_created_at
	   The time at which the object was created.

       (get|set)_data
	   A scalar containing or a reference pointing to the data to be stored.

       (get|set)_expires_at
	   The time at which the object should expire from the cache.

       (get|set)_key
	   The key under which the object was stored.

       (get|set)_size
	   The size of the frozen version of this object

SEE ALSO

       Cache::Cache

AUTHOR

       Original author: DeWitt Clinton <dewitt@unto.net>

       Last author:	$Author: dclinton $

       Copyright (C) 2001-2003 DeWitt Clinton

perl v5.12.4							    2009-03-01							Cache::Object(3pm)