Explanation/Reference:
Acceptance confirms that users' needs have been met by the supplied solution. Verification and Validation informs Acceptance by establishing the evidence - set against acceptance criteria - to determine if the solution meets the users' needs. Acceptance should also explicitly address any integration or interoperability requirements involving other equipment or systems. To enable acceptance every user and system requirement must have a 'testable' characteristic.
Accreditation is the formal acceptance of security, adequacy, authorization for operation and acceptance of existing risk. Accreditation is the formal declaration by a Designated Approving Authority (DAA) that an IS is approved to operate in a particular security mode using a prescribed set of safeguards to an acceptable level of risk.
Certification is the formal testing of security safeguards and assurance is the degree of confidence that the implemented security measures work as intended. The certification is a Comprehensive evaluation of the technical and nontechnical security features of an IS and other safeguards, made in support of the accreditation process, to establish the extent to which a particular design and implementation meets a set of specified ecurity requirements.
Assurance is the descriptions of the measures taken during development and evaluation of the product to assure compliance with the claimed security functionality. For example, an evaluation may require that all source code is kept in a change management system, or that full functional testing is performed. The Common Criteria provides a catalogue of these, and the requirements may vary from one evaluation to the next. The requirements for particular targets or types of products are documented in the Security Targets (ST) and Protection Profiles (PP), respectively.
Source: ROTHKE, Ben, CISSP CBK Review presentation on domain 4, August 1999.
and
Official ISC2 Guide to the CISSP CBK, Second Edition, on page 211.
and
http://www.aof.mod.uk/aofcontent/tactical/randa/content/randaintroduction.htm

Explanation/Reference:
In order to protect the confidentiality of the data.
The following answers are incorrect because :
Install a firewall is incorrect as this would come after the information has been identified for sensitivity levels.
Implement encryption is also incorrect as this is one of the mechanisms to protect the data once it has been identified.
Review all user access rights is also incorrect as this is also a protection mechanism for the identified information.
Reference : Shon Harris AIO v3 , Chapter-4 : Access Control , Page : 126

Explanation/Reference:
Management is responsible for protecting all assets that are directly or indirectly under their control.
They must ensure that employees understand their obligations to protect the company's assets, and implement security in accordance with the company policy. Finally, management is responsible for initiating corrective actions when there are security violations.
Source: HARE, Chris, Security management Practices CISSP Open Study Guide, version 1.0, april 1999.

Section: Network and Telecommunications
Explanation
Explanation/Reference:
With source routing, the packets hold the forwarding information so that they can find their way to the destination themselves without bridges and routers dictating their paths.
In computer networking, source routing allows a sender of a packet to specify the route the packet takes through the network.
With source routing the entire path to the destination is known to the sender and is included when sending data. Source routing differs from most other routing in that the source makes most or all of the routing decisions for each router along the way.
Source:
WALLHOFF, John, CISSP Summary 2002, April 2002, CBK#2 Telecommunications and Network Security (page 5) Wikipedia at http://en.wikipedia.org/wiki/Dynamic_Source_Routing