Chapter Review

The “Your Study Plan” element, just before Chapter 1, discusses how you should study and practice the content and skills for each chapter before moving on to the next chapter. That element introduces the tools used here at the end of each chapter. If you haven’t already done so, take a few minutes to read that section. Then come back here and do the useful work of reviewing the chapter to help lock into memory what you just read.

Review this chapter’s material using either the tools in the book or the interactive tools for the same material found on the book’s companion website. Table 1-4 outlines the key review elements and where you can find them. To better track your study progress, record when you completed these activities in the second column.

Table 1-4 ^{Chapter Review Tracking}

Review Element	Review Date(s)	Resource Used
Review key topics		Book, website
Review key terms		Book, website
Answer DIKTA questions		Book, PTP Online

Review All the Key Topics

Table 1-5 ^{Key Topics for} Chapter 1

Key Topic Elements	Description	Page Number
Figure 1-10	Shows the general concept of IP routing	29
Figure 1-11	Depicts the data-link services provided to IP for the purpose of delivering IP packets from host to host	30
Figure 1-12	Identifies the five steps to encapsulate data on the sending host	32
Figure 1-13	Shows the meaning of the terms segment, packet, and frame	32
Figure 1-14	Compares the OSI and TCP/IP networking models	33

Key Terms You Should Know

adjacent-layer interaction

de-encapsulation

encapsulation

frame

networking model

packet

same-layer interaction

segment

Chapter 2 Fundamentals of Ethernet LANs

This chapter covers the following exam topics:

1.0 Network Fundamentals

1.1 Explain the role and function of network components

1.1.b Layer 2 and Layer 3 switches

1.2 Describe characteristics of network topology architectures

1.2.e Small office/home office (SOHO)

1.3 Compare physical interface and cabling types

1.3.a Single-mode fiber, multimode fiber, copper

1.3.b Connections (Ethernet shared media and point-to-point)

Most enterprise computer networks can be separated into two general types of technology: local-area networks (LANs) and wide-area networks (WANs). LANs typically connect nearby devices: devices in the same room, in the same building, or in a campus of buildings. In contrast, WANs connect devices that are typically relatively far apart. Together, LANs and WANs create a complete enterprise computer network, working together to do the job of a computer network: delivering data from one device to another.

Many types of LANs have existed over the years, but today’s networks use two general types of LANs: Ethernet LANs and wireless LANs. Ethernet LANs happen to use cables for the links between nodes, and because many types of cables use copper wires, Ethernet LANs are often called wired LANs. Ethernet LANs also make use of fiber-optic cabling, which includes a fiberglass core that devices use to send data using light. In comparison to Ethernet, wireless LANs do not use wires or cables, instead using radio waves for the links between nodes; Part I of the CCNA 200-301 Official Cert Guide, Volume 2, Second Edition, discusses wireless LANs at length.

This chapter introduces Ethernet LANs, with more detailed coverage in Parts II and III of this book.