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63 Cards in this Set
- Front
- Back
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DISTINGUISH BETWEEN LANs AND WANs .
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LAN's EXIST WITHIN A COMPANY'S SITE, WHILE WANs CONNECT TO DIFFERENT SITES WITHIN AN ORGANIZATION.
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WHAT ARE CARRIERS?
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A TRANSMISSION SERVICE COMPANY THAT HAS GOVERNMENT RIGHTS OF WAY.
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WHAT ARE RIGHTS OF WAY?
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PERMISSION TO LAY WIRES IN PUBLIC AREA
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WHY DO YOU HAVE MORE FLEXIBILITY WITH LAN SERVICE THAN WITH WAN SERVICE?
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FOR LANS, THE COMPANY OWNS THE PROPERTY AND CAN DO WHAT IT WANTS AND CHOOSE THE TECHNOLOGY IT WISHES.
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WHY ARE TYPICAL WAN SPEEDS SLOWER THAN TYPICAL LAN SPEEDS?
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1. AS THE COST PER GIG INCREASES; TRANSMISSION LINES GET LONGER.
2. WAN CONNECTIONS ARE SHARED BY MANY USERS |
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WHY ARE FUTURE WAN PRICES DIFFICULT TO PREDICT?
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THEY ARE FOR CUSTOMER OWNED LAN TECHNOLOGY
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WHY DO MANs HAVE HIGHER TYPICAL SPEEDS THAN BROADER-SCOPE WANs?
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MANs COVER A RELATIVELY SHORTER DISTANCE SPAN
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ARE WANS AND LANS SINGLE NETWORKS OR INTERNETS?
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WANS AND LANS CAN BE SINGLE NETWORKS OR INTERNET DEPENDING ON THE SIZE OF THE LAN.
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IS THE INTERNET A WAN?
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THE GLOBAL INTERNET IS A WAN
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LIST THE THREE BASIC COMPONENTS OF WIDE AREA NETWORKS.
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1. CPE: CUSTOMER PREMISES EQUIPMENT
2. ACCESS LINKS 3. NETWORK CORE |
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ARE ACCESS LINKS WIRED OR WIRELESS?
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WIRED
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WHAT IS CPE? CUSTOMER PREMISES EQUIPMENT
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TELECOMMUNICATIONS HARDWARE LOCATED ON CUSTOMERS PREMISES.
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WHAT TWO TECHNOLOGIES ARE USED IN BUSINESS LOCAL LOOPS?
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2 PAIR DATA-GRADE UTP AND OPTICAL FIBER (CARRIER FIBER)
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WHAT TWO TECHNOLOGIES ARE USED IN RESIDENTIAL LOCAL LOOPS?
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1 PAIR VOICE-GRADE UTP AND OPTICAL FIBER (CARRIER FIBER)
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IS ALL UTP WIRING LIMITED TO 100 METERS? WHY?
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NO, BECAUSE THE BUSINESS AND RESIDENTIAL LINES MUST BE PULLED TO THE CUSTOMERS PREMISES
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ARE BUSINESS DSL'S SERVICE SPEEDS SYMMETRIC OR ASYMMETRIC?
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SYMMETRIC
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DO BUSINESS, RESIDENTIAL, OR BOTH DSL SERVICES OFFER QUALITY OF SERVICE GUARANTEES?
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BUSINESS
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WHAT IS THE FASTEST DSL STANDARD?
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SHDSL
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DOES RESIDENTIAL DSL OFFER SIMULTANEOUS VOICE AND DATA SERVICES?
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YES
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WHAT EQUIPMENT DOES THE CUSTOMER HAVE TO ADD TO THEIR HOME?
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A DSL MODEM
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WHAT IS THE PURPOSE FOR THE DSL ACCESS MULTIPLEXER?
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THIS DEVICE SEPARATES AND SENDS VOICE AND DATA.
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WHY IS FIBER TO HOME MORE ATTRACTIVE
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IT PROVIDES EXTREMELY HIGH SPEEDS.
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WHAT TRANSMISSION MEDIA DO CABLE TELEVISION COMPANIES USE?
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COAXIAL CABLE
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WHY IS COAXIAL CABLE CALLED COAXIAL?
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IT CONTAINS 2 CONDUCTORS THAT HAVE THE SAME AXIS.
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WHAT KIND OF AMPLIFIERS ARE NEEDED FOR CABLE DATA SERVICE
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TWO-WAY AMPLIFIERS
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WHAT DEVICE DO CUSTOMERS NEED FOR CABLE MODEM SERVICE?
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A CABLE MODEM
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WHAT 2 TECHNOLOGIES ARE NEEDED FOR LEASED LINE SWITCHED WANS?
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LEASED LINES AND A ROUTER
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WHAT ARE THE COST ELEMENTS IN NETWORKS OF LEASED LINES?
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SUBSTANTIAL LABOR COST
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LIST THE PHYSICAL COMPONENTS OF PSDN TECHNOLOGY
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1. X.25
2. FRAME RELAY 3. ATM 4. METROPOLITAN AREA ETHERNET. |
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DO CUSTOMERS NEED LEASED LINES IF THEY USE PSDN?
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NO BECAUSE IT IS CLOUD TECHNOLOGY
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WHAT IS A POP?
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POINT OF PRESENCE WHICH ARE ACCESS POINTS
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IF A COMPANY HAS 7 SITES, HOW MANY LEASED LINES WILL IT NEED IF IT USES A PSDN?
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7
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WHY IS PSDN 'S FAIRLY INEXPENSIVE
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COMPANIES CAN OUTSOURCE THE WORK OF RUNNING A SWITCHED DATA NETWORK TO CONNECT ITS SITES.
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WHY IS THE PSDN TRANSPORT CORE DRAWN AS A CLOUD?
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IT REFLECTS THE FACT THAT A CUSTOMER DOES NOT HAVE TO KNOW HOW THINGS WORK INSIDE THE CLOUD
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WHAT IS THE SPEED RANGE OF FRAME RELAY?
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256 KBPS
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WHY IS THIS SPEED RANGE FRAME RELAY ATTRACTIVE?
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IT HAD EXACTLY THE SPEED RANGE THAT CORPORATIONS NEEDED
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WHY HAS ATM NOT BEEN POPULAR?
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IT IS EXTREMELY EXPENSIVE
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WHAT IS METRO ETHERNET?
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A WAN THAT IS LIMITED TO A METROPOLITAN AREA,
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FOR WHAT REASON IS METRO ETHERNET ATTRACTIVE?
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IT OFFERS HIGH SPEEDS AT A LOW PRICE.
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WHAT PSDN SERVICE IS GROWING?
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ETHERNET
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WHY ARE VIRTUAL CIRCUITS USED?
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IT TRANSFERS DATA FROM A SOURCE TO A DESTINATION.
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WITH VIRTUAL CIRCUITS, ON WHAT DOES A SWITCH BASE ITS FORWARDING DECISION WHEN A FRAME ARRIVES.
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IT SELECTS THE BEST PATH BEFORE BEGINNING THE COMMUNICATION
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DO PSDN FRAMES HAVE DESTINATION ADDRESSES OR VIRTUAL CIRCUIT NUMBERS IN THEIR HEADERS?
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VIRTUAL CIRCUIT NUMBERS
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WHAT IS THE NAME OF THE FRAME RELAY VIRTUAL CIRCUIT NUMBER?
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DATA LINK CONTROL IDENTIFIER
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HOW LONG TYPICALLY, IS A DLCI?
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10 BITS LONG
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WHAT ARE THE TWO ATTRACTIONS OF USING THE INTENET AS A WANS?
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LOW COST AND NEARLY ALL CORPORATE SITES ARE ALREADY CONNECTED TO THE INTERNET.
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WHAT ARE THE 2 ISSUES THAT COMPANIES MUST OVERCOME TO USE THE INTERNET AS A WAN?
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SECURITY ISSUES AND QUALITY OF SERVICE
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LIST 3 PROTECTIONS THAT CAN BE USED TO ADDRESS THE LACK OF SECURITY ON THE INTERNET.
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1. FIREWALL
2. IPSEC 3. ANTIVIRUS FILTERING go back and check this one in the summary |
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WHAT TECHNOLOGY DO ISP'S USE TO PROVIDE QUALITY OF SERVICE?
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THEY USE MULTI-PROTOCOL LABEL SWITCHING (MPLS).
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DOES MPLS TECHNOLOGY WORK FOR SITE-TO-SITE TRAFFIC WITHIN A FIRM, FOR TRAFFIC WITH OTHER FIRMS, OR BOTH?
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SITE TO SITE TRAFFIC WITHIN A FIRM.
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IN CELLULAR TECHNOLOGY, WHAT IS A CELL?
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SMALL GEOGRAPHICAL AREAS
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WHAT IS A CELLSITE?
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THE MIDDLE OF A CELL
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WHAT ARE THE 2 FUNCTIONS OF MOBILE TELEPHONE SWITICHING OFFICE (MTSO)?
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1. IT CONNECTS CUSTOMERS TO ONE ANOTHER
2. IT CONTROLS WHAT HAPPENS AT EACH OF THE CELLSITES. go back and check this one in the summary |
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WHY DOES CELLULAR TELEPHONY USE CELLS?
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CELLULAR TELEPHONY CAN USE EACH CHANNEL MULTIPLE TIMES IN DIFFERENT CELLS IN THE NETWORK.
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WHAT IS THE BENEFIT OF CHANNEL REUSE?
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IT MULTIPLIES THE EFFECTIVE CHANNEL CAPACITY, ALLOWING MORE SUBSCRIBERS TO BE SERVED WITH THE LIMITED NUMBER OF CHANNELS AVAILABLE.
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DISTINGUISH BETWEEN HANDOFFS AND ROAMING IN CELLULAR TELEPHONY?
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1. HANDOFFS: WHEN A SUBSCRIBER MOVES FROM ONE CELL TO ANOTHER WITHIN A CITY, A HANDOFF IS IMPLEMENTED.
2. ROAMING: WHEN A SUBSCRIBER LEAVES A METROPOLITAN CELLULAR SYSTEM AND GOES TO ANOTHER COUNTRY. |
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DISTINGUISH BETWEEN HANDOFFS AND ROAMING IN 802.11 WIRELESS LANS
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IN THIS CASE, HANDOFFS AND ROAMING MEAN TO MOVE FROM ONE ACCESS POINT TO ANOTHER WITHIN THE SAME WLAN.
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WITH WHAT GENERATION DID WEB SURFING BECOME ATTRACTIVE?
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3RD GENERATION
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WHAT GENERATION IS HSPA?
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3RD GENERATION
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WHAT GENERATION IS LTE?
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4TH GENERATION
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LIST THE GENERAL CATEGORIES OF CONDITIONS THAT MAY LIMIT USER THROUGHPUT.
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1. SPECIFICATIONS OF TECHNOLOY
2. CHANNELS BEING SHARED 3. TIME OF DAY 4. LOCATION 5. CUSTOMER SMART PHONE LIMIT. |
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WHICH OUT OF THE 5 CATEGORIES CAN A CARRIER DO SOMETHING ABOUT.
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CHANNELS BEING SHARED
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WHAT MUST BE ADDED TO CREAT A CORPORATE VIRTUAL LAN?
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VIRTUAL LAN SOFTWARE
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