CompTIA® Network+® Review Guide, Second Edition

Appendix A

Answers to Review Questions

Chapter 1: Domain 1 Network Technologies

1. C. A Media Access Control (MAC) address is a unique physical address that is assigned to each network interface card. MAC addresses are “burned in” to the card at the manufacturer.
2. C. An IPv4 address is a 32-bit address. It is composed of four sections of 8 bits each, called octets. Each octet is converted to decimal for configuration purposes, but the computer uses the entire 32-bit address for communication.
3. B. If you have a Class B address with a default subnet mask, then the current subnet mask is 255.255.0.0. This means you have 16 bits for networks and 16 bits for hosts. If you want to create eight subnets, then you need to solve for 2^s > 8. Solving for s, ...