Ccna routing and Switching Complete Study Guide

A. Crossover

B. Rollover

C. Straight-through

D. Full-duplex

18.  Which of the following items does a socket comprise?

A.  IP address and MAC address

B.  IP address and port number

C.  Port number and MAC address

D.  MAC address and DLCI

19.  Which of the following hexadecimal numbers converts to 28 in decimal?

A. 1c

B. 12

C. 15

D. ab

20.  What cable type is shown in the following graphic?

Core

Cladding

Buffer

A.  Fiber optic

B. Rollover

C. Coaxial

D. Full-duplex 

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Chapter 

3

Introduction to  

TCP/IP

The followIng ICnD1 exam ToPICs 

are CovereD In ThIs ChaPTer:

 

✓

Network Fundamentals 

 

■

1.1 Compare and contrast OSI and TCP/IP models

 

■

1.2 Compare and contrast TCP and UDP protocols

 

■

1.7 Apply troubleshooting methodologies to resolve 

problems

 

■

1.7.a Perform fault isolation and document

 

■

1.7.b Resolve or escalate

 

■

1.7.c Verify and monitor resolution

 

■

1.9 Compare and contrast IPv4 address types

 

■

1.9.a Unicast

 

■

1.9.b Broadcast

 

■

1.9.c Multicast

 

■

1.10 Describe the need for private IPv4 addressing

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The Transmission Control Protocol/Internet Protocol (TCP/

IP) suite was designed and implemented by the Department of 

Defense (DoD) to ensure and preserve data integrity as well 

as maintain communications in the event of catastrophic war. So it follows that if designed 

and implemented correctly, a TCP/IP network can be a secure, dependable and resilient 

one. In this chapter, I’ll cover the protocols of TCP/IP, and throughout this book, you’ll 

learn how to create a solid TCP/IP network with Cisco routers and switches.

We’ll begin by exploring the DoD’s version of TCP/IP, then compare that version and its 

protocols with the OSI reference model that we discussed earlier.

Once you understand the protocols and processes used at the various levels of the DoD 

model, we’ll take the next logical step by delving into the world of IP addressing and the 

different classes of IP addresses used in networks today.

Subnetting is so vital, it will be covered in its own chapter, Chapter 4, 

“Easy Subnetting.”

Because having a good grasp of the various IPv4 address types is critical to understand-

ing IP addressing, subnetting, and variable length subnet masks (VLSMs), we’ll explore 

these key topics in detail, ending this chapter by discussing the various types of IPv4 

addresses that you’ll need to have down for the exam.

I’m not going to cover Internet Protocol version 6 in this chapter because we’ll get into 

that later, in Chapter 14, “Internet Protocol Version 6 (IPv6).” And just so you know, you’ll 

simply see Internet Protocol version 4 written as just IP, rarely as IPv4.

To find up-to-the-minute updates for this chapter, please see 

www.lammle 

.com/ccna

 or the book’s web page via 

www.sybex.com/go/ccna

.

Introducing TCP/IP

TCP/IP is at the very core of all things networking, so I really want to ensure that you have 

a comprehensive and functional command of it. I’ll start by giving you the whole TCP/IP 

backstory, including its inception, and then move on to describe the important technical 

goals as defined by its original architects. And of course I’ll include how TCP/IP compares 

to the theoretical OSI model.

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TCP/IP and the DoD Model