If a network engineer wants to allow a temporary entry for a remote user with a specific username and password so that the user can access the entire network over the internet.
The answer to this is Dynamic. Take note that the engineer only wants to provide access to the user for a temporary period of time. This ACL can be effective in providing what the user needs for a limited amount of time. Take note that this type of ACL is associated with the user directory which means that it can be specified how long the user will have access to the session.
The moment that time runs out, the person will lose access to the data again. This ACL can also be used in order to block traffic at times. If the access list would need to be changed, the whole access list would have to be removed and then created to accommodate the users that will be given access temporarily.
We can use a dynamic access list to authenticate a remote user with a specific username and password. The authentication process is done by the router or a central access server such as a TACACS+ or RADIUS server. The configuration of dynamic ACL can be read here: https://www.cisco.com/en/US/tech/tk583/tk822/technologies_tech_note09186a0080094524.shtml
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