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SY0-301 · Question #118

A security technician is working with the network firewall team to implement access controls at the company's demarc as part of the initiation of configuration management processes. One of the…

The correct answer is A. Rule based access control. Firewalls enforce access control by evaluating network traffic against an ordered set of administrator-defined rules, which is the definition of rule-based access control.

General security concepts

Question

A security technician is working with the network firewall team to implement access controls at the company's demarc as part of the initiation of configuration management processes. One of the network technicians asks the security technician to explain the access control type found in a firewall. With which of the following should the security technician respond?

Options

  • ARule based access control
  • BRole based access control
  • CDiscretionary access control
  • DMandatory access control

How the community answered

(25 responses)
  • A
    92% (23)
  • B
    4% (1)
  • C
    4% (1)

Why each option

Firewalls enforce access control by evaluating network traffic against an ordered set of administrator-defined rules, which is the definition of rule-based access control.

ARule based access controlCorrect

Rule-based access control (RuBAC) grants or denies access based on a set of predefined rules that apply to all subjects uniformly, regardless of identity or role. A firewall's access control lists (ACLs) consist of ordered rules that match traffic attributes such as IP address, port, and protocol, then permit or deny accordingly. This matches the RuBAC model precisely, as the rules are not tied to user identity or role but to traffic characteristics.

BRole based access control

Role-based access control assigns permissions based on a user's organizational role, which requires identity awareness that a stateless packet-filtering firewall does not provide.

CDiscretionary access control

Discretionary access control allows resource owners to define permissions at their own discretion and is associated with file system permissions, not network firewall rule sets.

DMandatory access control

Mandatory access control uses security labels and clearance levels enforced by the operating system, which is a host-level model unrelated to how firewall ACLs operate.

Concept tested: Rule-based access control in network firewalls

Source: https://csrc.nist.gov/publications/detail/sp/800-41/rev-1/final

Topics

#rule-based access control#firewall ACL#access control models#network security

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