A stream cipher treats the message as a stream of bits or bytes and performs mathematical functions on them individually. The key is a random value input into the stream cipher, which it uses to ensure the randomness of the keystream data. They are more suitable for hardware implementations, because they encrypt and decrypt one bit at a time. They are intensive because each bit must be manipulated, which works better at the silicon level. Block ciphers operate a the block level, dividing the message into blocks of bits. Cipher Block chaining (CBC) and Electronic Code Book (ECB) are operation modes of DES, a block encryption algorithm. Source: WALLHOFF, John, CBK#5 Cryptography (CISSP Study Guide), April 2002 (page 2).

Output controls are used for two things: for verifying the integrity and protecting the confidentiality of an output. These are examples of proper output controls.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the
Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 6: Operations
Security (page 218).

The following answers are incorrect:
Integrity paths has no meaning in the context of this question. Trusted paths brings to mind the
word integrity only in the context that the data was not changed and is in it's orginal condition. This
question also has less to do with integration and more to do with actual implementation of a
concept.
There is less need to create trusted paths to something that is already not secure.
MTBF is Mean Time Between Failure. This is not really related to a trusted path therefore not
related to this question.
The following reference(s) were/was used to create this question:
"Trusted paths provide trustworthy interfaces into privledged user functions and are intended to
provide a way to ensure that any communications over that path cannot be intercepted or
corrupted."
pp. 544 Official Guide to the CISSP CBK, Second Edition, copyright 2010, Edited by Harold F.
Tipton, Trusted Paths and Fail Secure Mechanisms;

Life-cycle Assurance - Requirements specified in the Orange Book are:
security testing,
design specification and testing,
configuration management, and
trusted distribution.
Operational Assurance - Concentrates on the product's architecture, embedded features, and
functionality that enable a customer to continually obtain the necessary level of protection when
using the product.
Reference(s) used for this question:
KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of
Computer Security, page 219.
Also check out: HARRIS, Shon, All-In-One CISSP Certification Exam Guide 3rd Edition, McGraw-
Hill/Osborne, 2005 (pages 904, 961).

Fiber optic is immune to the effects of electromagnetic interference, is very hard to tap and has a much longer effective usable length than any other cable type. The primary drawbacks of this cable type are its cost of installation and the high level of expertise needed to have it properly terminated.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the
Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 3:
Telecommunications and Network Security (page 72).