Chapters and Topics
■ Chapter 1, “Living in a Network-Centric World,” presents the basics of communication and
describes how networks support the way we live. This chapter introduces the concepts
of data networks, scalability, quality of service (QoS), security issues,
network
collaboration
tools, and Packet Tracer.
■ Chapter 2, “Communicating over the Network,” introduces the devices, media, and protocols
that enable network communication. This chapter introduces the OSI and
TCP/IP
models, the importance of addressing and naming schemes, and the process of
data
encapsulation. You also learn about the tools designed to analyze and simulate
network
functionality,
such as Wireshark.
■ Chapter 3, “Application Layer Functionality and Protocols,” introduces you to the top
network model layer, the application layer. In this context, you will explore
the
interaction
of protocols, services, and applications, with a focus on HTTP, DNS,
DHCP,
SMTP/POP, Telnet, and FTP.
■ Chapter 4, “OSI Transport Layer,” focuses on the role of the transport layer as
it provides
the end-to-end transfer of data between applications. You learn how TCP and UDP
apply to common applications.
■ Chapter 5, “OSI Network Layer,” introduces
the concepts of routing packets from a device
on one network to a device on a different network. You learn important concepts related
to addressing, path determination, data packets, and IP. xxii
Network Fundamentals, CCNA Exploration Companion Guide
■ Chapter 6, “Addressing the Network: IPv4,” focuses on network addressing in detail and
describes how to use the address mask, or prefix length, to determine the
numberof
subnetworks and hosts in a network. This chapter also introduces Internet
Control Message
Protocol (ICMP) tools, such as ping and trace.
■ Chapter 7, “OSI Data Link Layer,” discusses how the OSI data link layer prepares network
layer packets for transmission and controls access to the physical media. This
chapter
includes a description of the encapsulation processes that occur as data
travelsacross
the LAN and the WAN.
■ Chapter 8, “OSI Physical Layer,” explores
the functions, standards, and protocols associated
with the physical layer (Layer 1). You discover how data sends signals and is encoded
for travel across the network. You learn about bandwidth and also about thetypes
of media and their associated connectors.
■ Chapter 9, “Ethernet,” examines the
technologies and operation of Ethernet. Topics
include
the evolution of Ethernet technologies, MAC, and Address Resolution Protocol(ARP).
■ Chapter 10, “Planning and Cabling Networks,” focuses on designing and cabling a network.
You will apply the knowledge and skills developed in the previous chapters to determine
which cables to use, how to connect devices, and how to develop an addressingand
testing scheme.
■ Chapter 11, “Configuring and Testing Your Network,” describes how to connect and
configure a small network using basic Cisco IOS commands for routers and
switches.
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