, Chapter vg1
Introduction vgto vgData vgCommunications
True-False vgQuestions
The vgfollowing vgare vgpossible vgTrue/False vgquestions vgfor vgtests. vgThe vgstatement vgis
vggiven vgand vgthe vganswer vgis vgprovided vgin vgsquare vgbrackets. vgThe vglevel vgof vgdifficulty
vg(easy, vgmoderate, vgdifficult) vgand vgthe vgpage vgnumber(s) vgrelevant vgto vgthe vgtopic vgare
vgalso vgfurnished.
1. According vgto vgJohn vgChambers, vgCEO vgof vgCisco vg(a vgleading vgnetworking
vgtechnology vgcompany), vgthe vginformation vgage vgis vgthe vgsecond vgIndustrial
vgRevolution.
Answer:True Difficulty: vgEasy Reference: vg p. vg4
2. Due vgto vgrecent vgadvances vgin vghigh vgspeed vgcommunication vgnetworks, vgthe
vginformation vglag, vgor vgthe vgtime vgit vgtakes vgfor vginformation vgto vgbe vgdisseminated
vgaround vgthe vgworld, vghas vgbeen vgsignificantly vgshortened.
Answer:True Difficulty: v g Easy Reference: v g p.4
3. One vgperspective vgof vgdata vgcommunications vgand vgnetworking vgas vgstated vgin vgthe
vgtextbook, vgexamines vgthe vgmanagement vgof vgnetworking vgtechnologies, vgincluding
vgsecurity, vgnetwork vgdesign, vgand vgmanaging vgthe vgnetwork vgon vga vgday-to-day
vgbasis vgand vglong vgterm vgbasis.
Answer:True Difficulty: v g Moderate Reference: v g p. vg5
4. The vgfirst vgelectronic vgdata vgcommunication vgsystem vgwas vgthe vgtelephone vgdeveloped
vgby vgAlexander vgGraham vgBell.
Answer:False Difficulty: vgEasy Reference: v g p. vg5
5. The vgfirst vgtranscontinental vgtelephone vgservice vgwas vgestablished vgin vgthe vg1940s.
Answer:False Difficulty: vgEasy Reference: v g p. vg6
6. An vgInter-Exchange vgCarrier vg(IXC) vgprovides vgonly vglocal vgtelephone vgservices
vgto vghomes vgand vgbusinesses.
Answer: vgFalse Difficulty: v g Easy Reference: v g p. vg6
7. Common vgcarriers vginclude vgthe vgRBOCs, vgIXCs, vgand vgCable vgTV vgcompanies.
Answer:True Difficulty: vgModerate Reference: v g p. vg7
8. The vgTelecommunications vgAct vgof vg1996 vgnow vgpermits vgthe vgRBOCs vgto
vgprovide vglong vgdistance vgoutside vgthe vgregion vgin vgwhich vgthey vgprovide vglocal
vgtelephone vgservices.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg7
9. The vgInternet vgwas vgstarted vgby vgthe vgU.S. vgDepartment vgof vgdefense vgin vg1969
vgas vga vgnetwork vgof vgfour vgcomputers vgcalled vgARPANET.
Answer:False Difficulty: Reference:
vgModerate p. vg11
, Answer: vgTrue Difficulty: v g Moderate Reference: v g p. vg9
10. Telecommunications vgis vgthe vgtransmission vgof vgvoice vgand vgvideo vgas vgwell vgas
vgdata vgand vgimplies vgtransmitting vga vglonger vgdistance vgthan vgin vga vgdata
vgcommunication vgnetwork.
Answer:False Difficulty: Reference:
vgModerate p. vg11
, 11. A vglocal vgarea vgnetwork vg(LAN) vgconnects vgother vgLANs vgand vgBNs vglocated vgin
vgdifferent vgareas vgto vgeach vgother vgand vgto vgwide vgarea vgnetworks vgin vga vgspan
vgfrom vg3 vgto vg30 vgmiles.
Answer: vgFalse Difficulty: vgModerate Reference: v g p. vg13
12. An vgintranet vgis vga vgLAN vgthat vguses vgInternet vgtechnologies vgand vgis vgpublicly
vgavailable vgto vgpeople vgoutside vgof vgthe vgorganization.
Answer: vgFalse Difficulty: vgModerate Reference: v g p. vg15
13. A vgcar vgmanufacturer vgmay vggive vgaccess vgto vgcertain vgportions vgof vgits vgnetwork vgto
vgsome vgof vgits vgsuppliers vgvia vgInternet. vgThis vgis vgan vgexample vgof vgan vgExtranet.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg15
14. The vgOSI vgmodel vgis vgthe vgmost vgwidely vgused vgnetwork vgmodel vgto vgdevelop vgand vgbuild
vgnetworks vgtoday.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg16
15. The vgnetwork vglayer vgis vgresponsible vgfor vgrouting vgmessages vgfrom vgthe vgsource
vgcomputer vgto vgthe vgdestination vgcomputer.
Answer: vgTrue Difficulty: vgEasy Reference: v g p. vg17
16. In vgthe vgOSI vgmodel, vgthe vgapplication vglayer vgis vgthe vgend vguser‟s vgaccess vgto vgthe
vgnetwork.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg18
17. The vgapplication vglayer vgis vgthe vgseventh vglayer vgof vgthe vgInternet vgmodel vgand
vgprovides vgthe vgend vguser‟s vgaccess vgto vgthe vgnetwork.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg18
18. At vgthe vgtransport vglayer vgin vgthe vgInternet vgmodel, vgTCP vgis vgresponsible vgfor
vgbreaking vglarge vgfiles vgreceived vgfrom vgthe vgapplication vglayer vginto vgsmaller
vgpackets vgand vgopening vga vgconnection vgto vga vgserver vgfor vgtransferring vgthe vgpackets.
Answer: vgTrue Difficulty: vgDifficult Reference: vg p. vg17
19. Ethernet vgis vgan vgexample vgof vga vgnetwork vglayer vgprotocol.
Answer: vgFalse Difficulty: vgEasy Reference: v g p. vg17
20. Data vgcommunication vgstandards vgenable vgeach vglayer vgin vgthe vgsending vgcomputer
vgto vgcommunicate vgwith vgits vgcorresponding vglayer vgin vgthe vgreceiving vgcomputer.
Answer: vgTrue Difficulty: vgEasy Reference: vg p. vg22
21. The vgspecification vgstage vgof vgthe vgformal vgstandardization vgprocess vgconsists
vgof vgdeveloping vgnomenclature vgand vgidentifying vgthe vgproblems vgto vgbe
vgaddressed.
Answer: vgTrue Difficulty: vgModerate Reference: vg p. vg23
22. ANSI vgis vga vgvoting vgparticipant vgin vgthe vgISO.
Answer: Difficulty: Reference: vg p.
vgFalse vgModerate vg26
Introduction vgto vgData vgCommunications
True-False vgQuestions
The vgfollowing vgare vgpossible vgTrue/False vgquestions vgfor vgtests. vgThe vgstatement vgis
vggiven vgand vgthe vganswer vgis vgprovided vgin vgsquare vgbrackets. vgThe vglevel vgof vgdifficulty
vg(easy, vgmoderate, vgdifficult) vgand vgthe vgpage vgnumber(s) vgrelevant vgto vgthe vgtopic vgare
vgalso vgfurnished.
1. According vgto vgJohn vgChambers, vgCEO vgof vgCisco vg(a vgleading vgnetworking
vgtechnology vgcompany), vgthe vginformation vgage vgis vgthe vgsecond vgIndustrial
vgRevolution.
Answer:True Difficulty: vgEasy Reference: vg p. vg4
2. Due vgto vgrecent vgadvances vgin vghigh vgspeed vgcommunication vgnetworks, vgthe
vginformation vglag, vgor vgthe vgtime vgit vgtakes vgfor vginformation vgto vgbe vgdisseminated
vgaround vgthe vgworld, vghas vgbeen vgsignificantly vgshortened.
Answer:True Difficulty: v g Easy Reference: v g p.4
3. One vgperspective vgof vgdata vgcommunications vgand vgnetworking vgas vgstated vgin vgthe
vgtextbook, vgexamines vgthe vgmanagement vgof vgnetworking vgtechnologies, vgincluding
vgsecurity, vgnetwork vgdesign, vgand vgmanaging vgthe vgnetwork vgon vga vgday-to-day
vgbasis vgand vglong vgterm vgbasis.
Answer:True Difficulty: v g Moderate Reference: v g p. vg5
4. The vgfirst vgelectronic vgdata vgcommunication vgsystem vgwas vgthe vgtelephone vgdeveloped
vgby vgAlexander vgGraham vgBell.
Answer:False Difficulty: vgEasy Reference: v g p. vg5
5. The vgfirst vgtranscontinental vgtelephone vgservice vgwas vgestablished vgin vgthe vg1940s.
Answer:False Difficulty: vgEasy Reference: v g p. vg6
6. An vgInter-Exchange vgCarrier vg(IXC) vgprovides vgonly vglocal vgtelephone vgservices
vgto vghomes vgand vgbusinesses.
Answer: vgFalse Difficulty: v g Easy Reference: v g p. vg6
7. Common vgcarriers vginclude vgthe vgRBOCs, vgIXCs, vgand vgCable vgTV vgcompanies.
Answer:True Difficulty: vgModerate Reference: v g p. vg7
8. The vgTelecommunications vgAct vgof vg1996 vgnow vgpermits vgthe vgRBOCs vgto
vgprovide vglong vgdistance vgoutside vgthe vgregion vgin vgwhich vgthey vgprovide vglocal
vgtelephone vgservices.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg7
9. The vgInternet vgwas vgstarted vgby vgthe vgU.S. vgDepartment vgof vgdefense vgin vg1969
vgas vga vgnetwork vgof vgfour vgcomputers vgcalled vgARPANET.
Answer:False Difficulty: Reference:
vgModerate p. vg11
, Answer: vgTrue Difficulty: v g Moderate Reference: v g p. vg9
10. Telecommunications vgis vgthe vgtransmission vgof vgvoice vgand vgvideo vgas vgwell vgas
vgdata vgand vgimplies vgtransmitting vga vglonger vgdistance vgthan vgin vga vgdata
vgcommunication vgnetwork.
Answer:False Difficulty: Reference:
vgModerate p. vg11
, 11. A vglocal vgarea vgnetwork vg(LAN) vgconnects vgother vgLANs vgand vgBNs vglocated vgin
vgdifferent vgareas vgto vgeach vgother vgand vgto vgwide vgarea vgnetworks vgin vga vgspan
vgfrom vg3 vgto vg30 vgmiles.
Answer: vgFalse Difficulty: vgModerate Reference: v g p. vg13
12. An vgintranet vgis vga vgLAN vgthat vguses vgInternet vgtechnologies vgand vgis vgpublicly
vgavailable vgto vgpeople vgoutside vgof vgthe vgorganization.
Answer: vgFalse Difficulty: vgModerate Reference: v g p. vg15
13. A vgcar vgmanufacturer vgmay vggive vgaccess vgto vgcertain vgportions vgof vgits vgnetwork vgto
vgsome vgof vgits vgsuppliers vgvia vgInternet. vgThis vgis vgan vgexample vgof vgan vgExtranet.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg15
14. The vgOSI vgmodel vgis vgthe vgmost vgwidely vgused vgnetwork vgmodel vgto vgdevelop vgand vgbuild
vgnetworks vgtoday.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg16
15. The vgnetwork vglayer vgis vgresponsible vgfor vgrouting vgmessages vgfrom vgthe vgsource
vgcomputer vgto vgthe vgdestination vgcomputer.
Answer: vgTrue Difficulty: vgEasy Reference: v g p. vg17
16. In vgthe vgOSI vgmodel, vgthe vgapplication vglayer vgis vgthe vgend vguser‟s vgaccess vgto vgthe
vgnetwork.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg18
17. The vgapplication vglayer vgis vgthe vgseventh vglayer vgof vgthe vgInternet vgmodel vgand
vgprovides vgthe vgend vguser‟s vgaccess vgto vgthe vgnetwork.
Answer: vgTrue Difficulty: vgModerate Reference: v g p. vg18
18. At vgthe vgtransport vglayer vgin vgthe vgInternet vgmodel, vgTCP vgis vgresponsible vgfor
vgbreaking vglarge vgfiles vgreceived vgfrom vgthe vgapplication vglayer vginto vgsmaller
vgpackets vgand vgopening vga vgconnection vgto vga vgserver vgfor vgtransferring vgthe vgpackets.
Answer: vgTrue Difficulty: vgDifficult Reference: vg p. vg17
19. Ethernet vgis vgan vgexample vgof vga vgnetwork vglayer vgprotocol.
Answer: vgFalse Difficulty: vgEasy Reference: v g p. vg17
20. Data vgcommunication vgstandards vgenable vgeach vglayer vgin vgthe vgsending vgcomputer
vgto vgcommunicate vgwith vgits vgcorresponding vglayer vgin vgthe vgreceiving vgcomputer.
Answer: vgTrue Difficulty: vgEasy Reference: vg p. vg22
21. The vgspecification vgstage vgof vgthe vgformal vgstandardization vgprocess vgconsists
vgof vgdeveloping vgnomenclature vgand vgidentifying vgthe vgproblems vgto vgbe
vgaddressed.
Answer: vgTrue Difficulty: vgModerate Reference: vg p. vg23
22. ANSI vgis vga vgvoting vgparticipant vgin vgthe vgISO.
Answer: Difficulty: Reference: vg p.
vgFalse vgModerate vg26
