Explanation/Reference:
Explanation:
Global access rules allow you to apply a global rule to ingress traffic without the need to specify an
interface to which the rule must be applied. Using global access rules provides the following benefits:
When migrating to the adaptive security appliance from a competitor appliance, you can maintain a

global access rule policy instead of needing to apply an interface-specific policy on each interface.
Global access control policies are not replicated on each interface, so they save memory space.

Global access rules provides flexibility in defining a security policy. You do not need to specify which

interface a packet comes in on, as long as it matches the source and destination IP addresses.
Global access rules use the same mtrie and stride tree as interface-specific access rules, so scalability

and performance for global rules are the same as for interface-specific rules.
Reference:http://www.cisco.com/c/en/us/td/docs/security/asa/asa83/configuration/guide/config/
access_rules.html