The first activity in every recovery plan is damage assessment, immediately followed by damage mitigation.
This first activity would typically include assessing the damage to all network and server components (including cables, boards, file servers, workstations, printers, network equipment), making a list of all items to be repaired or replaced, selecting appropriate vendors and relaying findings to Emergency Management Team.
Following damage mitigation, equipment can be recovered and LAN communications network and servers can be reinstalled.
Source: BARNES, James C. & ROTHSTEIN, Philip J., A Guide to Business Continuity Planning, John Wiley & Sons, 2001 (page 135).

The Point-to-Point Protocol (PPP) was designed to support multiple network
types over the same serial link, just as Ethernet supports multiple network types over the
same LAN. PPP replaces the earlier Serial Line Internet Protocol (SLIP) that only supports
IP over a serial link. PPTP is a tunneling protocol.
Source: STREBE, Matthew and PERKINS, Charles, Firewalls 24seven, Sybex 2000,
Chapter 3: TCP/IP from a Security Viewpoint.

Explanation/Reference:
The test environment must be controlled and stable in order to ensure that development projects are tested in a realistic environment which, as far as possible, mirrors the live environment.
Reference(s) used for this question:
Information Systems Audit and Control Association, Certified Information Systems Auditor 2002 review manual, chapter 6: Business Application System Development, Acquisition, Implementation and Maintenance (page 309).

TACACS+ is a proprietary Cisco enhancement to TACACS and is more
robust than RADIUS. PAP is not a remote access authentication system but a remote node
security protocol.
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 122).

A sag is a momentary low voltage. A spike is a momentary high voltage. A fault is a momentary power out and a brownout is a prolonged power supply that is below normal voltage. Source: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-Hill/Osborne, 2002, chapter 6: Physical security (page 299)