NETWORKING
CONTENTS INTRODUCTION 1 PART I GETTING STARTED WITH NETWORKING 7 CHAPTER 1 NETWORKS WILL NOT TAKE OVER THE WORLD AND OTHER NETWORK BASICS 9 CHAPTER 2 LIFE ON THE NETWORK 21 CHAPTER 3 USING A NETWORK PRINTER 33 CHAPTER 4 SHARING YOUR FILES AND PRINTERS 45 CHAPTER 5 MR MCFEELEY S GUIDE TO E MAIL 51 CHAPTER 6 USING MICROSOFT OFFICE ON A NETWORK 61 PART II BUILDING YOUR OWN NETWORK 67 CHAPTER 7 THE BAD NEWS YOU HAVE TO PLAN AHEAD 69 CHAPTER 8 UNDERSTANDING NETWORK OPERATING SYSTEMS 87 CHAPTER 9 OH WHAT A TANGLED WEB WE WEAVE CABLES ADAPTERS AND OTHER STUFF 103 CHAPTER 10 SETTING UP A WIRELESS NETWORK 129 CHAPTER 11 CONFIGURING CLIENT COMPUTERS 147 PART III NETWORK MANAGEMENT FOR DUMMIES 159 CHAPTER 12 HELP WANTED JOB DESCRIPTION FOR A NETWORK ADMINISTRATOR 161 CHAPTER 13 BIG BROTHER S GUIDE TO NETWORK SECURITY 173 CHAPTER 14 IF I COULD SAVE TIME IN A BOTTLENECK OPTIMIZING YOUR NETWORK S PERFORMANCE 189 CHAPTER 15 HOW TO SLEEP WELL AT NIGHT OR BACKING UP YOUR NETWORK DATA 199 CHAPTER 16 MAJOR ANNOYANCES 213 CHAPTER 17 NETWORK TROUBLESHOOTING 223 CHAPTER 18 HOW TO STAY ON TOP OF YOUR NETWORK AND KEEP THE USERS OFF YOUR BACK 239 PART IV NETWORK OPERATING SYSTEMS 245 CHAPTER 19 WINDOWS SERVER 2003 247 CHAPTER 20 NETWARE 6 AND 6 5 275 CHAPTER 21 USING A LINUX SERVER 297 CHAPTER 22 MACINTOSH NETWORKING 315 PART V TCP IP AND THE INTERNET 321 CHAPTER 23 CONNECTING YOUR NETWORK TO THE INTERNET 323 CHAPTER 24 UNDERSTANDING IP ADDRESSES 331 CHAPTER 25 CONFIGURING YOUR NETWORK FOR DHCP 345 PART VI THE PART OF TENS 353 CHAPTER 26 TEN BIG NETWORK MISTAKES 355 CHAPTER 27 TEN NETWORKING COMMANDMENTS 361 CHAPTER 28 TEN THINGS YOU SHOULD KEEP IN YOUR CLOSET 365 CHAPTER 29 TEN NETWORK GIZMOS ONLY BIG NETWORKS NEED 369 CHAPTER 30 TEN LAYERS OF THE OSI MODEL 377 INTRODUCTION W ELCOME TO THE SEVENTH EDITION OF NETWORKING FOR DUMMIES THE BOOK THAT S WRITTEN ESPECIALLY FOR PEOPLE WHO HAVE THIS NAGGING FEELING IN THE BACK OF THEIR MINDS THAT THEY SHOULD NETWORK THEIR COMPUTERS BUT HAVEN T A CLUE AS TO HOW TO START OR WHERE TO BEGIN DO YOU OFTEN COPY A SPREADSHEET FILE TO A FLOPPY DISK AND GIVE IT TO THE PERSON IN THE NEXT OFFICE SO THAT HE OR SHE CAN LOOK AT IT ARE YOU FRUSTRATED BECAUSE YOU CAN T USE THE FANCY LASER PRINTER THAT S ON THE FINANCIAL SECRETARY S COM PUTER DO YOU WAIT IN LINE TO USE THE COMPUTER THAT HAS THE CUSTOMER DATA BASE YOU NEED A NETWORK OR MAYBE YOU ALREADY HAVE A NETWORK BUT YOU HAVE JUST ONE PROBLEM THEY PROMISED THAT THE NETWORK WOULD MAKE YOUR LIFE EASIER BUT INSTEAD IT S TURNED YOUR COMPUTING LIFE UPSIDE DOWN JUST WHEN YOU HAD THIS COMPUTER THING FIGURED OUT SOMEONE POPPED INTO YOUR OFFICE HOOKED UP A CABLE AND SAID HAPPY NETWORKING MAKES YOU WANT TO SCREAM EITHER WAY YOU VE FOUND THE RIGHT BOOK HELP IS HERE WITHIN THESE HUMBLE PAGES THIS BOOK TALKS ABOUT NETWORKS IN EVERYDAY AND OFTEN IRREVERENT TERMS THE LANGUAGE IS FRIENDLY YOU DON T NEED A GRADUATE EDUCATION TO GET THROUGH IT AND THE OCCASIONAL POTSHOT WILL HELP UNSEAT THE HALLOWED AND SACRED TRADI TIONS OF NETWORKDOM BRINGING JUST A BIT OF FUN TO AN OTHERWISE DRY SUBJECT THE GOAL IS TO BRING THE LOFTY PRECEPTS OF NETWORKING DOWN TO EARTH WHERE YOU CAN TOUCH THEM AND SQUEEZE THEM AND SAY WHAT S THE BIG DEAL I CAN DO THIS ABOUT THIS BOOK THIS ISN T THE KIND OF BOOK YOU PICK UP AND READ FROM START TO FINISH AS IF IT WERE A CHEAP NOVEL IF I EVER SEE YOU READING IT AT THE BEACH I LL KICK SAND IN YOUR FACE THIS BOOK IS MORE LIKE A REFERENCE THE KIND OF BOOK YOU CAN PICK UP TURN TO JUST ABOUT ANY PAGE AND START READING IT HAS 30 CHAPTERS EACH ONE COVERING A SPECIFIC ASPECT OF NETWORKING SUCH AS PRINTING ON THE NET WORK HOOKING UP NETWORK CABLES OR SETTING UP SECURITY SO THAT BAD GUYS CAN T BREAK IN JUST TURN TO THE CHAPTER YOU RE INTERESTED IN AND START READING EACH CHAPTER IS DIVIDED INTO SELF CONTAINED CHUNKS ALL RELATED TO THE MAJOR THEME OF THE CHAPTER FOR EXAMPLE THE CHAPTER ON HOOKING UP THE NETWORK CABLE CONTAINS NUGGETS LIKE THESE WHAT IS ETHERNET ALL ABOUT CABLING AND STUFF ATTACHING CONNECTORS TO UTP CABLE HUBS AND SWITCHES WALL JACKS AND PATCH PANELS YOU DON T HAVE TO MEMORIZE ANYTHING IN THIS BOOK IT S A NEED TO KNOW BOOK YOU PICK IT UP WHEN YOU NEED TO KNOW SOMETHING NEED TO KNOW WHAT 100BASET IS PICK UP THE BOOK NEED TO KNOW HOW TO CREATE GOOD PASSWORDS PICK UP THE BOOK OTHERWISE PUT IT DOWN AND GET ON WITH YOUR LIFE HOW TO USE THIS BOOK THIS BOOK WORKS LIKE A REFERENCE START WITH THE TOPIC YOU WANT TO FIND OUT ABOUT LOOK FOR IT IN THE TABLE OF CONTENTS OR IN THE INDEX TO GET GOING THE TABLE OF CONTENTS IS DETAILED ENOUGH THAT YOU SHOULD BE ABLE TO FIND MOST OF THE TOPICS YOU RE LOOKING FOR IF NOT TURN TO THE INDEX WHERE YOU CAN FIND EVEN MORE DETAIL AFTER YOU VE FOUND YOUR TOPIC IN THE TABLE OF CONTENTS OR THE INDEX TURN TO THE AREA OF INTEREST AND READ AS MUCH AS YOU NEED OR WANT THEN CLOSE THE BOOK AND GET ON WITH IT OF COURSE THE BOOK IS LOADED WITH INFORMATION SO IF YOU WANT TO TAKE A BRIEF EXCURSION INTO YOUR TOPIC YOU RE MORE THAN WELCOME IF YOU WANT TO KNOW THE BIG SECURITY PICTURE READ THE WHOLE CHAPTER ON SECURITY IF YOU JUST WANT TO KNOW HOW TO MAKE A DECENT PASSWORD READ JUST THE SECTION ON PASSWORDS YOU GET THE IDEA IF YOU NEED TO TYPE SOMETHING YOU LL SEE THE TEXT YOU NEED TO TYPE LIKE THIS TYPE THIS STUFF IN THIS EXAMPLE YOU TYPE TYPE THIS STUFF AT THE KEYBOARD AND PRESS ENTER AN EXPLANATION USUALLY FOLLOWS JUST IN CASE YOU RE SCRATCHING YOUR HEAD AND GRUNTING HUH WHENEVER I DESCRIBE A MESSAGE OR INFORMATION THAT YOU SEE ON THE SCREEN I PRESENT IT AS FOLLOWS A MESSAGE FROM YOUR FRIENDLY NETWORK 2 INTRODUCTION THIS BOOK RARELY DIRECTS YOU ELSEWHERE FOR INFORMATION JUST ABOUT EVERY THING THAT YOU NEED TO KNOW ABOUT NETWORKS IS RIGHT HERE BUT IF YOU DO FIND THE NEED FOR ADDITIONAL INFORMATION THERE ARE PLENTY OF OTHER FOR DUMMIES BOOKS THAT CAN HELP IF YOU HAVE A NETWORKING QUESTION THAT ISN T COVERED IN THIS BOOK ALLOW ME TO SUGGEST MY OWN NETWORKING ALL IN ONE DESK REFERENCE FOR DUMMIES IT S A MUCH EXPANDED REFERENCE BOOK THAT GOES DEEPER INTO SPECIFIC NETWORK OPERATING SYSTEMS AND TCP IP PROTOCOLS YOU CAN ALSO FIND PLENTY OF OTHER FOR DUMMIES BOOKS THAT COVER JUST ABOUT EVERY OPERATING SYSTEM AND APPLICATION PROGRAM KNOWN TO HUMANITY WHAT YOU DON T NEED TO READ ASIDE FROM THE TOPICS YOU CAN USE RIGHT AWAY MUCH OF THIS BOOK IS SKIPPABLE I VE CAREFULLY PLACED EXTRA TECHNICAL INFORMATION IN SELF CONTAINED SIDEBARS AND CLEARLY MARKED THEM SO YOU CAN STEER CLEAR OF THEM DON T READ THIS STUFF UNLESS YOU RE REALLY INTO TECHNICAL EXPLANATIONS AND WANT TO KNOW A LITTLE OF WHAT S GOING ON BEHIND THE SCENES DON T WORRY MY FEELINGS WON T BE HURT IF YOU DON T READ EVERY WORD FOOLISH ASSUMPTIONS I M GOING TO MAKE ONLY TWO ASSUMPTIONS ABOUT WHO YOU ARE 1 YOU RE SOME ONE WHO WORKS WITH A PC AND 2 YOU EITHER HAVE A NETWORK OR YOU RE THINK ING ABOUT GETTING ONE I HOPE YOU KNOW AND ARE ON SPEAKING TERMS WITH SOMEONE WHO KNOWS MORE ABOUT COMPUTERS THAN YOU DO MY GOAL IS TO DECREASE YOUR RELIANCE ON THAT PERSON BUT DON T THROW AWAY HIS OR HER PHONE NUMBER QUITE YET IS THIS BOOK USEFUL FOR MACINTOSH USERS ABSOLUTELY ALTHOUGH THE BULK OF THIS BOOK IS DEVOTED TO SHOWING YOU HOW TO LINK WINDOWS BASED COMPUTERS TO FORM A NETWORK YOU CAN FIND INFORMATION ABOUT HOW TO NETWORK MACINTOSH COMPUTERS AS WELL HOW THIS BOOK IS ORGANIZED INSIDE THIS BOOK YOU FIND CHAPTERS ARRANGED IN SIX PARTS EACH CHAPTER BREAKS DOWN INTO SECTIONS THAT COVER VARIOUS ASPECTS OF THE CHAPTER S MAIN SUBJECT THE CHAPTERS ARE IN A LOGICAL SEQUENCE SO READING THEM IN ORDER IF YOU WANT 3 INTRODUCTION