CCNA Routing and Switching Complete Deluxe Study Guide, 2nd Edition

Appendix B Answers to Review Questions

Chapter 1: Internetworking

1. A. The device shown is a hub and hubs place all ports in the same broadcast domain and the same collision domain.
2. 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.
3. 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 Interconnect (OSI) model and make data-forwarding ...