I. Inputs Organizational process assets Procurement management plan Evaluation criteria Procurement document package Proposals Qualified sellers list Project management plan                  - Risk register                  - Risk related contractual agreements II. Tools and Techniques Weighting system Independent estimates Screening system Contract negotiation Seller rating systems Expert judgment Proposal evaluation techniques III. Outputs Selected sellers Contract Contract management plan Resource availability Procurement management plan (updates) Requested changes

I. Inputs Contract Contract management plan Selected sellers Performance reports Approved change requests Work performance information II. Tools and Techniques Contract change control system Buyer-conducted performance review Inspections and audits Performance reporting Payment system Claims administration Records management system Information technology III. Outputs Contract documentation  Requested changes Recommended corrective actions Organizational process assets (updates) Project management plan (updates)                  - Procurement management plan                  - Contract management plan

I. Inputs Procurement management plan Contract management plan Contract documentation Contract closure procedure II. Tools and Techniques Procurement audits Records management system III. Outputs Closed contracts Organizational process assets (updates)

Answer: B) 3, 2, 1, none Explanation: Routers operate at layer 3. LAN switches operate at layer 2. Ethernet hubs operate at layer 1. Word processing applications communicate to the Application layer interface, but do not operate at layer 7, so the answer would be none.

Answer: C) Layer 4 Explanation: A reliable Transport layer connection uses acknowledgments to make sure all data is transmitted and received reliably. A reliable connection is defined by a virtual circuit that uses acknowledgments, sequencing, and flow control, which are characteristics of the transport layer.

Answer: D) Session Explanation: The Session layer of the OSI model offers three different modes of communication : Simplex, half duplex, and full duplex.

Answer: B) Routers Explanation: Routersoperate no higher than layer 3 of the OSI model.

Answer: C) Data, segment, packet, frame, bit Explanation: The encapsulation method is data, segment, packet, frame, bit.