Deck 4: Access Control

Question 1

A user program executes in a kernel mode in which certain areas of memory
are protected from the user's use and certain instructions may not be executed.

Answer 1

False

Question 2

An auditing function monitors and keeps a record of user accesses to
system resources.

Answer 2

True

Question 3

The authentication function determines who is trusted for a given purpose.

Answer 3

False

Question 4

T F 4.External devices such as firewalls cannot provide access control services.

Question 5

Access control is the central element of computer security.

Question 6

__________ implements a security policy that specifies who or what may have access to each specific system resource and the type of access that is permitted in each instance.

A)Audit control
B)Resource control
C)System control
D)Access control

Question 7

A constraint is a defined relationship among roles or a condition related to
roles.

Question 8

A user may belong to multiple groups.

Question 9

Security labels indicate which system entities are eligible to access certain
resources.

Question 10

Any program that is owned by,and SetUID to,the "superuser" potentially
grants unrestricted access to the system to any user executing that program.

Question 11

__________ is the traditional method of implementing access control.

A)MAC
B)RBAC
C)DAC
D)MBAC

Question 12

__________ is verification that the credentials of a user or other system entity are valid.

A)Adequacy
B)Authentication
C)Authorization
D)Audit

Question 13

An ABAC model can define authorizations that express conditions on
properties of both the resource and the subject.

Question 14

Traditional RBAC systems define the access rights of individual users and
groups of users.

Question 15

The default set of rights should always follow the rule of least privilege or
read-only access

Question 16

_________ is the granting of a right or permission to a system entity to access a system resource.

A)Authorization
B)Authentication
C)Control
D)Monitoring

Question 17

The principal objectives of computer security are to prevent
unauthorized users from gaining access to resources,to prevent legitimate users from accessing resources in an unauthorized manner,and to enable legitimate users to access resources in an authorized manner.

Question 18

__________ controls access based on comparing security labels with security clearances.

A)MAC
B)DAC
C)RBAC
D)MBAC

Question 19

Reliable input is an access control requirement.

Question 20

An access right describes the way in which a subject may access an object.

Question 21

A(n)__________ is a resource to which access is controlled.

A)object
B)owner
C)world
D)subject

Question 22

A __________ is a named job function within the organization that controls this computer system.

A)user
B)role
C)permission
D)session

Question 23

The __________ user ID is exempt from the usual file access control constraints and has system wide access.

Question 24

Role hierarchies make use of the concept of __________ to enable one role to implicitly include access rights associated with a subordinate role.

Question 25

A __________ is a mapping between a user and an activated subset of the set of roles to which the user is assigned.

Question 26

The basic elements of access control are: subject,__________,and access right.

Question 27

X.800 defines __________ as the prevention of unauthorized use of a resource,
including the prevention of use of a resource in an unauthorized manner.

Question 28

The final permission bit is the _________ bit.

A)superuser
B)kernel
C)set user
D)sticky

Question 29

__________ provide a means of adapting RBAC to the specifics of administrative and security policies in an organization.

A)Constraints
B)Mutually Exclusive Roles
C)Cardinality
D)Prerequisites

Question 30

Basic access control systems typically define three classes of subject: owner,__________ and world.

Question 31

__________ refers to setting a maximum number with respect to roles.

A)Cardinality
B)Prerequisite
C)Exclusive
D)Hierarchy

Question 32

A __________ is an entity capable of accessing objects.

A)group
B)object
C)subject
D)owner

Question 33

Subject attributes,object attributes and environment attributes are the three types of attributes in the __________ model.

A)DSD
B)RBAC
C)ABAC
D)SSD

Question 34

__________ access control controls access based on the roles that users have within the system and on rules stating what accesses are allowed to users in given roles.

Question 35

__________ access control controls access based on the identity of the requestor and on access rules stating what requestors are or are not allowed to do.

Question 36

__________ is based on the roles the users assume in a system rather than the user's identity.

A)DAC
B)RBAC
C)MAC
D)URAC

Question 37

The __________ component deals with the management and control of the ways entities are granted access to resources.

A)resource management
B)access management
C)privilege management
D)policy management ¸

Question 38

A concept that evolved out of requirements for military information security is ______ .

A)reliable input
B)mandatory access control
C)open and closed policies
D)discretionary input

Question 39

A __________ access control scheme is one in which an entity may be granted access rights that permit the entity,by its own volition,to enable another entity to access some resource.

Question 40

An independent review and examination of system records and activities in order to test for adequacy of system controls,to ensure compliance with established policy and operational procedures,to detect breaches in security,and to recommend any indicated changes in control,policy and procedures is a(n)__________ .

Question 41

A __________ dictates that a user can only be assigned to a particular role if it is already assigned to some other specified role and can be used to structure the implementation of the least privilege concept.

Question 42

In digital identity systems,a __________ functions as a certification program.

Question 43

The three types of attributes in the ABAC model are subject attributes,object attributes,and _________ attributes.

Question 44

A __________ is an object or data structure that authoritatively binds an identity to a token possessed and controlled by a subscriber.

Question 45

There are three key elements to an ABAC model: attributes which are defined for entities in a configuration;a policy model,which defines the ABAC policies;and the __________ model,which applies to policies that enforce access control.