Explanation/Reference:
A data backup is the first step in contingency planning.
Without data, there is nothing to process. "No backup, no recovery".
Backup for hardware should be taken care of next.
Formal arrangements must be made for alternate processing capability in case the need should arise.
Operating systems and application software should be taken care of afterwards.
Source: VALLABHANENI, S. Rao, CISSP Examination Textbooks, Volume 2: Practice, SRV Professional Publications, 2002, Chapter 8, Business Continuity Planning & Disaster Recovery Planning (page 506).

It is usually responsible for maintaining and protecting the data.
The following answers are incorrect:
Data owner is usually a member of management , in charge of a specific business unit and
is ultimately responsible for the protection and use of the information.
User is any individual who routinely uses the data for work-related tasks.
Security administrator's tasks include creating new system user accounts , implementing
new security software.
References : Shon Harris AIO v3 , Chapter - 3: Security Management Practices , Pages :
99 - 103

Explanation/Reference:
TCP Wrappers can control when a UDP server starts but has little control afterwards because UDP packets can be sent randomly.
The following answers are incorrect:
It stops packets before they reach the application layer, thus confusing some proxy servers. Is incorrect because the TCP Wrapper acts as an ACL restricting packets so would not confuse a proxy server because the packets would not arrive and would not be a limitation.
The hosts. access control system requires a complicated directory tree. Is incorrect because a simple directory tree is involved.
They are too expensive. Is incorrect because TCP Wrapper is considered open source with a BSD licensing scheme.

Explanation/Reference:
If the protocol field has a value of 6 then it would indicate it was TCP.
The protocol field of the IP packet dictates what protocol the IP packet is using.
TCP=6, ICMP=1, UDP=17, IGMP=2
The following answers are incorrect:
ICMP. Is incorrect because the value for an ICMP protocol would be 1.
UDP. Is incorrect because the value for an UDP protocol would be 17.
IGMP. Is incorrect because the value for an IGMP protocol would be 2.
References:
SANS http://www.sans.org/resources/tcpip.pdf?ref=3871