Tài liệu CCNP Remote Access Study Guide ppt

Dedicated to the memory of Julius Grosberg.—Robert Padjen
This book is dedicated to Erin for putting up with my hiding in my office and
never coming out.—Sean Odom
Copyright ©2000 SYBEX , Inc., Alameda, CA
www.sybex.com

Acknowledgments

W

e would like to thank Neil Edde, Linda Lee, and Jeff Kellum for
helping to define and structure this book’s contents. Thanks also to Rebecca
Rider and Susan Berge for editing the chapters and to Matthew E. Luallen
and Mark Tashiro for reviewing the chapters for technical accuracy.
Elizabeth Campbell deserves a thank you for maintaining the schedule and
keeping us on track. Thanks to Nanette Duffy, Amey Garber, Mae Lum,
and Laurie O’Connell for proofreading the book and to Judy Fung and Susie
Hendrickson for putting the finishing touches on the pages.
—Robert Padjen, Todd Lammle, and Sean Odom
It is unrealistic to thank my family for everything they have done for me.
However, I will try, with gratitude to my mom and dad, wife Kristie, and boys
Eddie and Tyler. Thanks to Sean and the Schwabbies for a unique and fun
work environment, and to my new family at Callisma. Thanks to Natasha for
bringing a bit of fun to the summer and our family (a break from writing), in
addition to the Russian lessons—

spasiba bal'shoye

. In addition, I’d like to
thank all the people at Sybex who work so very hard to produce these books,
and the readers who provide us with valuable feedback to make our books
stronger.
—Robert Padjen
There are a few people I wish to thank for getting me where I am today.
First, Todd Lammle, for choosing me (the needle) out of the haystack (all the
other Cisco writers) and letting my name grace the cover of a book with his
name on it. Also, all those who hate my hiding place (office) since I started
writing. In particular, Erin, Hillary, Sean Jr., Mikayla, and the rest of my
family.
—Sean Odom
Copyright ©2000 SYBEX , Inc., Alameda, CA
www.sybex.com

Introduction

T

he new Cisco certifications reach beyond the popular certifications,
such as the MCSE and CNE, to provide you with an indispensable factor in
understanding today’s network—insight into the Cisco world of internet-
working. This book is intended to help you continue on your exciting new
path toward obtaining CCNP and CCIE certification. Before reading this
book, you should have at least read the

CCNA: Cisco Certified Network
Associate Study Guide

(Sybex, 2000). While you can take the CCNP tests in
any order, you should pass the CCNA exam before pursuing your CCNP.
Many questions in the 640-505 exam are built upon the CCNA material.
However, we have done everything possible to make sure you can pass the
640-505 exam by reading this book and practicing with Cisco routers.

Cisco—A Brief History

A lot of readers may already be familiar with Cisco and what they do. How-
ever, those of you who are new to the field, just coming in fresh from your
MCSE, or those of you who have maybe 10 or more years in the field but
wish to brush up on the new technology may appreciate a little background
on Cisco.
In the early 1980s, Len and Sandy Bosack, a married couple who worked
in different computer departments at Stanford University, were having trouble
getting their individual systems to communicate (like many married people).
So in their living room they created a gateway server that made it easier for
their disparate computers in two different departments to communicate using
the IP protocol. In 1984, they founded cisco Systems (notice the small

c)

with
a small commercial gateway server product that changed networking forever.
Some people think the name was intended to be San Francisco Systems but the
paper got ripped on the way to the incorporation lawyers—who knows? In
1992, the company name was changed to Cisco Systems, Inc.
The first product the company marketed was called the Advanced Gate-
way Server (AGS). Then came the Mid-Range Gateway Server (MGS), the
Compact Gateway Server (CGS), the Integrated Gateway Server (IGS), and
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xxii

Introduction

the AGS+. Cisco calls these “the old alphabet soup products.” In 1993, Cisco
came out with the amazing 4000 router and then created the even more
amazing 7000, 2000, and 3000 series routers. These are still around and
evolving (almost daily, it seems).
Cisco has since become an unrivaled worldwide leader in networking for
the Internet. Its networking solutions can easily connect users who work
from diverse devices on disparate networks. Cisco products make it simple
for people to access and transfer information without regard to differences
in time, place, or platform.
In the big picture, Cisco provides end-to-end networking solutions that
customers can use to build an efficient, unified information infrastructure of
their own or to connect to someone else’s. This is an important piece in the
Internet/networking-industry puzzle because a common architecture that
delivers consistent network services to all users is now a functional impera-
tive. Because Cisco offers such a broad range of networking and Internet ser-
vices and capabilities, users needing regular access to their local network or
the Internet can do so unhindered, making Cisco’s wares indispensable.
Cisco answers this need with a wide range of hardware products that
form information networks using the Cisco Internetwork Operating System
(IOS) software. This software provides network services, paving the way for
networked technical support and professional services to maintain and opti-
mize all network operations.
Along with the Cisco IOS, one of the services Cisco created to help sup-
port the vast amount of hardware it has engineered is the Cisco Certified
Internetwork Expert (CCIE) program, which was designed specifically to
equip people to effectively manage the vast quantity of installed Cisco net-
works. The business plan is simple: If you want to sell more Cisco equipment
and install more Cisco networks, ensure that the networks you install run
properly.
However, having a fabulous product line isn’t all it takes to guarantee the
huge success Cisco enjoys—lots of companies with great products are now
defunct. If you have complicated products designed to solve complicated
problems, you need knowledgeable people who are fully capable of install-
ing, managing, and troubleshooting them. That part isn’t easy, so Cisco
began the CCIE program to equip people to support these complicated net-
works. This program, known colloquially as the Doctorate of Networking,
has also been successful, due primarily to its extreme difficulty. Cisco con-
tinuously monitors the program, changing it as it sees fit, to make sure it
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Introduction

xxiii

remains pertinent and accurately reflects the demands of today’s internet-
working business environments.
Building upon the highly successful CCIE program, Cisco Career Certifi-
cations permit you to become certified at various levels of technical profi-
ciency, spanning the disciplines of network design and support. So whether
you’re beginning a career, changing careers, securing your present position,
or seeking to refine and promote your position, this is the book for you!

Cisco’s Network Support Certifications

Cisco has created new certifications that will help you get the coveted CCIE,
as well as aid prospective employers in measuring skill levels. Before these
new certifications, you took only one test and were then faced with the lab,
which made it difficult to succeed. With these new certifications, which add
a better approach to preparing for that almighty lab, Cisco has opened doors
that few were allowed through before. So, what are these new certifications,
and how do they help you get your CCIE?

Cisco Certified Network Associate (CCNA) 2.0

The CCNA certification is the first in the new line of Cisco certifications and
is a precursor to all current Cisco certifications. With the new certification
programs, Cisco has created a stepping-stone approach to CCIE certifica-
tion. Now you can become a Cisco Certified Network Associate for the mea-
ger cost of Sybex’s

CCNA: Cisco Certified Network Associate Study Guide,


plus $100 for the test. And you don’t have to stop there—you can continue
with your studies and achieve a higher certification called the Cisco Certified
Network Professional (CCNP). Someone with a CCNP has all the skills and
knowledge needed to attempt the CCIE lab. However, because no textbook
can take the place of practical experience, we’ll discuss what else you need to
be ready for the CCIE lab shortly.

Check

www.routersim.com

for a cost-effective Cisco router simulator.

Cisco Certified Network Professional (CCNP) 2.0

Cisco Certified Network Professional (CCNP), Cisco’s new certification, has
opened up many opportunities for those individuals wishing to become
Cisco-certified but lacking the training, the expertise, or the bucks to pass the
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xxiv

Introduction

notorious and often failed two-day Cisco torture lab. The new Cisco certifi-
cations will truly provide exciting new opportunities for the CNE and MCSE
who are unsure of how to advance to a higher level.
So, you may be thinking, “Great, what do I do after passing the CCNA
exam?” Well, if you want to become a CCIE in Routing and Switching (the
most popular certification), understand that there’s more than one path to
that much-coveted CCIE certification. The first way is to continue studying
and become a Cisco Certified Network Professional (CCNP), which means
four more tests, in addition to the CCNA certification.
The CCNP program will prepare you to understand and comprehensively
tackle the internetworking issues of today and beyond—and it is not limited
to the Cisco world. You will undergo an immense metamorphosis, vastly
increasing your knowledge and skills through the process of obtaining these
certifications.

Todd Lammle offers a hands-on Cisco seminar (

www.lammle.com

) that pro-
vides two Cisco courses in one week of training. The Cisco CCNA/CCNP/CCDP
seminars include CCNA/CCDA, Routing/Support, and Remote Access/Switch-
ing. Each course is six days long, and every student receives two routers and

a switch to configure.

While you don’t need to be a CCNP or even a CCNA to take the CCIE lab, it’s

extremely helpful if you already have these certifications.

What Skills Do You Need to Become a CCNP?

Cisco demands a certain level of proficiency for its CCNP certification. In
addition to mastering the skills required for the CCNA, you should have the
following skills for the CCNP:


Installing, configuring, operating, and troubleshooting complex
routed LAN, routed WAN, and switched LAN networks, along with
dial-access services


Understanding complex networks, such as IP, IGRP, IPX, async rout-
ing, AppleTalk, extended access lists, IP RIP, route redistribution, IPX
RIP, route summarization, OSPF, VLSM, BGP, serial, IGRP, Frame
Relay, ISDN, ISL, X.25, DDR, PSTN, PPP, VLANs, Ethernet, ATM
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Introduction

xxv

LANE–emulation, access lists, 802.10, FDDI, and transparent and
translational bridging
To meet the CCNP requirements, you must be able to perform the following:


Install and/or configure a network to increase bandwidth, quicken
network response times, and improve reliability and quality of service.


Maximize performance through campus LANs, routed WANs, and
remote access.


Improve network security.


Create a global intranet.


Provide access security to campus switches and routers.


Provide increased switching and routing bandwidth—end-to-end
resiliency services.


Provide custom queuing and routed priority services.

How Do You Become a CCNP?

After becoming a CCNA, you must take four exams to get your CCNP:

Exam 640-503: Routing

This exam continues to build on the fundamen-
tals learned in the CCNA course. It focuses on large multiprotocol internet-
works and how to manage them with access lists, queuing, tunneling, route
distribution, router maps, BGP, OSPF, and route summarization.

Exam 640-504: Switching

This exam tests your knowledge of the 1900
and 5000 series of Catalyst switches. Sybex’s

CCNP: Switching Study
Guide

(Fall 2000) covers all the objectives you need to understand to pass
the Switching exam.

Exam 640-506: Support

This exam tests you on the Cisco IOS trouble-
shooting information available. You must be able to troubleshoot Ether-
net and Token Ring LANS, IP, IPX, and AppleTalk networks, as well as
ISDN, PPP, and Frame Relay networks. Sybex’s

CCNP: Switching Study
Guide

covers all the exam objectives.

Exam 640-505: Remote Access

This exam tests your knowledge of
installing, configuring, monitoring, and troubleshooting Cisco ISDN and
dial-up access products. You must understand PPP, ISDN, Frame Relay,
and authentication. This book covers all the exam objectives.
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xxvi

Introduction

If you hate tests, you can take fewer of them by signing up for the CCNA exam
and the Support exam and then taking just one more long exam called the
Foundation R/S exam (640-509). Doing this also gives you your CCNP—but
beware, it’s a really long test that fuses all the material listed previously into
one exam. Good luck! However, by taking this exam, you get three tests for
the price of two, which saves you $100 (if you pass). Some people think it’s
easier to take the Foundation R/S exam because you can leverage the areas

that you would score higher in against the areas in which you wouldn’t.

Remember that test objectives and tests can change at any time without
notice. Always check the Cisco Web site (

www.cisco.com

) for the most up-to-

date information.

Cisco Certified Internetwork Expert (CCIE)

You’ve become a CCNP, and now you fix your sights on getting your Cisco
Certified Internetwork Expert (CCIE) in Routing and Switching—what do
you do next? Cisco recommends that before you take the lab, you take test
640-025: Cisco Internetwork Design (CID) and the Cisco authorized course
called Installing and Maintaining Cisco Routers (IMCR). By the way, no
Prometric test for IMCR exists at the time of this writing, and Cisco recom-
mends a

minimum

of two years of on-the-job experience before taking the
CCIE lab. After jumping those hurdles, you then have to pass the CCIE-R/S
Exam Qualification (exam 350-001) before taking the actual lab.
To become a CCIE, Cisco recommends the following:

1.

Attend all the recommended courses at an authorized Cisco training
center and pony up around $15,000–$20,000, depending on your cor-
porate discount.

2.

Pass the Drake/Prometric exam ($200 per exam—so hopefully you’ll
pass it the first time).

3.

Pass the two-day, hands-on lab at Cisco. This costs $1,000 per lab,
which many people fail two or more times. (Some never make it
through!) Also, because you can take the exam only in San Jose, Cal-
ifornia; Research Triangle Park, North Carolina; Sydney, Australia;
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Introduction

xxvii

Halifax, Nova Scotia; Tokyo, Japan; or Brussels, Belgium, you might
just need to add travel costs to that $1,000. Cisco has added new sites
lately for the CCIE lab; it is best to check the Cisco Web site for the
most current information.

What Skills Do You Need to Become a CCIE?

The CCIE Routing and Switching exam includes the advanced technical
skills that are required to maintain optimum network performance and reli-
ability, as well as advanced skills in supporting diverse networks that use dis-
parate technologies. CCIEs just don’t have problems getting jobs; these
experts are basically inundated with offers to work for six-figure salaries!
But that’s because it isn’t easy to attain the level of capability that is manda-
tory for Cisco’s CCIE. For example, a CCIE must have the following skills
down pat:


Installing, configuring, operating, and troubleshooting complex
routed LAN, routed WAN, switched LAN, and ATM LANE net-
works, along with dial-access services


Diagnosing and resolving network faults


Using packet/frame analysis and Cisco debugging tools


Documenting and reporting the problem-solving processes used


Having general LAN/WAN knowledge, including data encapsulation
and layering; windowing and flow control, and their relation to delay;
error detection and recovery; link-state, distance vector, and switching
algorithms; management, monitoring, and fault isolation


Having knowledge of a variety of corporate technologies—including
major services provided by Desktop, WAN, and Internet groups—as
well as the functions; addressing structures; and routing, switching,
and bridging implications of each of their protocols


Having knowledge of Cisco-specific technologies, including router/
switch platforms, architectures, and applications; communication
servers; protocol translation and applications; configuration com-
mands and system/network impact; and LAN/WAN interfaces, capa-
bilities, and applications


Designing, configuring, installing, and verifying voice-over-IP and
voice-over-ATM networks
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xxviii

Introduction

Cisco’s Network Design Certifications

In addition to the network support certifications, Cisco has created another
certification track for network designers. The two certifications within this
track are the Cisco Certified Design Associate (CCDA) and Cisco Certified
Design Professional (CCDP) certifications. If you’re reaching for the CCIE
stars, we highly recommend the CCNP and CCDP certifications before
attempting the lab (or attempting to advance your career). These certifica-
tions will give you the knowledge to design routed LAN, routed WAN, and
switched LAN and ATM LANE networks.

Cisco Certified Design Associate (CCDA)

To become a CCDA, you must pass the DCN (Designing Cisco Networks) test
(640-441). To pass this test, you must understand how to do the following:


Design simple routed LAN, routed WAN, and switched LAN and
ATM LANE networks.


Use Network-layer addressing.


Filter with access lists.


Use and propagate VLAN.


Size networks.

Sybex’s

CCDA: Cisco Certified Design Associate Study Guide

(1999) is the

most cost-effective way to study for and pass your CCDA exam.

Cisco Certified Design Professional (CCDP) 2.0

If you’re already a CCNP and want to get your CCDP, you can simply take
the CID 640-025 test. If you’re not yet a CCNP, however, you must take the
CCDA, CCNA, Routing, Switching, Remote Access, and CID exams.
CCDP certification skills include the following:


Designing complex routed LAN, routed WAN, and switched LAN
and ATM LANE networks


Building upon the base level of the CCDA technical knowledge
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