CCST Cisco Certified Support Technician Study Guide

AppendixAnswers to Review Questions

Chapter 1: Internetworking

1. B.  The contents of a protocol data unit (PDU) depend on the PDU because they are created in a specific order and their contents are based on that order. A packet will contain IP addresses but not MAC addresses because MAC addresses are not present until the PDU becomes a frame.
2. C.  You should select a router to connect the two groups. When computers are in different subnets, as these two groups are, you will require a device that can make decisions based on IP addresses. Routers operate at layer 3 of the Open Systems Interconnection (OSI) model and make data-forwarding decisions based on layer 3 networking information, which are IP addresses. They create routing tables that ...