Section: Protection of Information Assets
Explanation:
Dial-up connectivity not based on centralize control and least preferred from security and control standpoint.
Remote access user can connect remotely to their organization's networks with the same level of functionality as if they would access from within their office.
In connecting to an organization's network, a common method is to use dial-up lines. Access is granted through the organization's network access server (NAS) working in concert with an organization network firewall and router. The NAS handle user authentication, access control and accounting while maintaining connectivity. The most common protocol for doing this is the Remote Access Dial-In User Service (RADIUS) and Terminal Access Controller Access Controller System (TACACS).
Remote access Controls include:
Policy and standard
Proper authorization
Identification and authentication mechanism
Encryption tool and technique such as use of VPN
System and network management
Reference:
CISA Review Manual 2014 Page number 334

"An intrusion detection system should to able to run continually without human supervision. The
system must be reliable enough to allow it to run in the background of the system being observed.
However, it should not be a ""black
box"", coz you want to ensure its internal workings are examinable from outside."

The most effective way for controlling visitor access to a data center is to ensure that visitors are escorted by an authorized employee, as this prevents unauthorized or malicious actions by the visitors and provides accountability and supervision. Pre-approval of entry requests, visitors signing in at the front desk upon arrival, and closed-circuit television (CCTV) are also useful measures, but they are not as effective as escorting visitors, as they do not prevent or detect unauthorized or malicious actions by the visitors in real time. References: CISA Review Manual (Digital Version), Chapter 5: Protection of Information Assets, Section 5.1: Physical Access Controls1