Symmetric-key algorithms are a class of algorithms for cryptography that use the same cryptographic keys for both encryption of plaintext (sender) and decryption of ciphertext (receiver). The keys may be identical, in practice, they represent a shared secret between two or more parties that can be used to maintain a private information link.
This requirement that both parties have access to the secret key is one of the main drawbacks of symmetric key encryption, in comparison to public-key encryption. This is also known as secret key encryption. In symmetric key cryptography, each end of the conversation must have the same key or they cannot decrypt the message sent to them by the other party.
Symmetric key crypto is very fast but more difficult to manage due to the need to distribute the key in a secure means to all parts needing to decrypt the data. There is no key management built within Symmetric crypto.
PKI provides CIA - Confidentiality (Through encryption) Integrity (By guaranteeing that the message hasn't change in transit) and Authentication (Non-repudiation). Symmetric key crypto provides mostly Confidentiality.
The following answers are incorrect:
-PKI - Public Key Infrastructure: This is the opposite of symmetric key crypto. Each side in PKI has their own private key and public key. What one key encrypt the other one can decrypt. You make use of the receiver public key to communicate securely with a remote user. The receiver will use their matching private key to decrypt the data.
-Diffie-Hellman: Sorry, this is an asymmetric key technique. It is used for key agreement over an insecure network such as the Internet. It allows two parties who has never met to negotiate a secret key over an insecure network while preventing Man-In-The-Middle (MITM) attacks.
-DSS - Digital Signature Standard: Sorry, this is an asymmetric key technique.
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Since we want to deal with printer reports, we are talking about output controls, Why, because printer produce output, and we can control it. As a best practice you can have people dedicated in the company to receive the different print jobs in the printing center, and people that takes care of the confidential information requiring a signature from the sender stating that the document was delivered to the owner in a timely and secure fashion.

The disaster/emergency management and business continuity community consists of many different types of entities, such as governmental (federal, state, and local), nongovernmental (business and industry), and individuals. Each entity has its own focus and its own definition of a disaster. The correct answers are examples of these various definitions of disasters. A very common definition of a disaster is a suddenly occurring or unstoppable developing event that: Claims loss of life, suffering, loss of valuables, or damage to the environment. Overwhelms local resources or efforts.
Has a long-term impact on social or natural life that is always negative in the beginning. Source: NFPA 1600 Standard on Disaster/Emergency Management and Business Continuity, National Fire Protection Association, 2000 edition.

L2F (Layer 2 Forwarding) provides no authentication or encryption. It is a
Protocol that supports the creation of secure virtual private dial-up networks over the
Internet.
At one point L2F was merged with PPTP to produce L2TP to be used on networks and not only on dial up links.
IPSec is now considered the best VPN solution for IP environments.
Source: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-
Hill/Osborne, 2002, Chapter 8: Cryptography (page 507).