Computer Networking A Top-Down Approach, 8th Edition by James
b b b b b b b b
b Kurose
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
,Computer Networking: A Top-Down Approach,
b b b b
8th Edition
b
b
Solutions to Review Questions and Problems
b b b b b
Version Date: August 2020
b b b
This bdocument bcontains bthe bsolutions bto breview bquestions band bproblems bfor bthe b8th
bedition bof bComputer bNetworking: bA bTop-Down bApproach bby bJim bKurose band
bKeith bRoss. bThese bsolutions bare bbeing bmade bavailable bto binstructors bONLY. b Please
bdo bNOT bcopy bor bdistribute bthis bdocument bto bothers b(even bother binstructors). bPlease
bdo bnot bpost bany bsolutions bon ba bpublicly-available bWeb bsite. bWe’ll bbe bhappy bto
bprovide ba bcopy b(up-to-date) bof bthis bsolution bmanual bourselves bto banyone bwho basks.
Acknowledgments: bOver bthe byears, bseveral bstudents band bcolleagues bhave bhelped bus
bprepare bthis bsolutions bmanual. bSpecial bthanks bgoes bto bHonggang bZhang, bRakesh
bKumar, bPrithula bDhungel, bVijay bAnnapureddy, bYifan bZhou. bAlso bthanks bto ball bthe
breaders bwho bhave bmade bsuggestions band bcorrected berrors.
All bmaterial b© bcopyright b1996-2020 bby bJ.F. bKurose band bK.W. bRoss. bAll brights breserved
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
,Chapter 1 Review Questions
b b b
1. There bis bno bdifference. bThroughout bthis btext, bthe bwords b“host” band b“end
bsystem” bare bused binterchangeably. bEnd bsystems binclude bPCs, bworkstations,
bWeb bservers, bmail bservers, bPDAs, bInternet-connected bgame bconsoles, betc.
2. From bWikipedia: bDiplomatic bprotocol bis bcommonly bdescribed bas ba bset bof
binternational bcourtesy brules. bThese bwell-established band btime-honored brules
bhave bmade bit beasier bfor bnations band bpeople bto blive band bwork btogether. bPart bof
bprotocol bhas balways bbeen bthe backnowledgment bof bthe bhierarchical bstanding bof ball
bpresent. bProtocol brules bare bbased bon bthe bprinciples bof bcivility.
3. Standards bare bimportant bfor bprotocols bso bthat bpeople bcan bcreate bnetworking bsystems
band bproducts bthat binteroperate.
4. 1. bDial-up bmodem bover btelephone bline: bhome; b2. bDSL bover btelephone bline:
bhome bor bsmall boffice; b3. bCable bto bHFC: bhome; b4. b100 bMbps bswitched
bEthernet: benterprise.
5. HFC bbandwidth bis bshared bamong bthe busers. bOn bthe bdownstream bchannel, ball
bpackets bemanate bfrom ba bsingle bsource, bnamely, bthe bhead bend. bThus, bthere bare
bno bcollisions bin bthe bdownstream bchannel.
6. In bmost bAmerican bcities, bthe bcurrent bpossibilities binclude: bdial-up; bDSL; bcable
bmodem; bfiber-to-the-home.
7. Ethernet bLANs bhave btransmission brates bof b10 bMbps, b100 bMbps, b1 bGbps band b10 bGbps.
8. Today, bEthernet bmost bcommonly bruns bover btwisted-pair bcopper bwire. bIt balso bcan brun
bover bfibers boptic blinks.
9. ADSL: bup bto b24 bMbps bdownstream band b2.5 bMbps bupstream, bbandwidth bis
bdedicated; bHFC, brates bup bto b42.8 bMbps band bupstream brates bof bup bto b30.7
bMbps, bbandwidth bis bshared. bFTTH: b2-10Mbps bupload; b10-20 bMbps bdownload;
bbandwidth bis bnot bshared.
10. There bare btwo bpopular bwireless bInternet baccess btechnologies btoday:
a. Wifi b(802.11) bIn ba bwireless bLAN, bwireless busers btransmit/receive
bpackets bto/from ban bbase bstation b(i.e., bwireless baccess bpoint) bwithin ba
bradius bof bfew btens bof bmeters. bThe bbase bstation bis btypically bconnected bto
bthe bwired bInternet band bthus bserves bto bconnect bwireless busers bto bthe
bwired bnetwork.
b. 3G band b4G bwide-area bwireless baccess bnetworks. bIn bthese bsystems,
bpackets bare btransmitted bover bthe bsame bwireless binfrastructure bused bfor
bcellular btelephony, bwith bthe bbase bstation bthus bbeing bmanaged bby ba
btelecommunications bprovider. bThis bprovides bwireless baccess bto busers
bwithin ba bradius bof btens bof bkilometers bof bthe bbase bstation.
11. At btime bt0 bthe bsending bhost bbegins bto btransmit. bAt btime bt1 b= bL/R1, bthe bsending
bhost bcompletes btransmission band bthe bentire bpacket bis breceived bat bthe brouter b(no
bpropagation bdelay). bBecause bthe brouter bhas bthe bentire bpacket bat btime bt1, bit bcan
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
, begin bto btransmit bthe
b
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
b b b b b b b b
b Kurose
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
,Computer Networking: A Top-Down Approach,
b b b b
8th Edition
b
b
Solutions to Review Questions and Problems
b b b b b
Version Date: August 2020
b b b
This bdocument bcontains bthe bsolutions bto breview bquestions band bproblems bfor bthe b8th
bedition bof bComputer bNetworking: bA bTop-Down bApproach bby bJim bKurose band
bKeith bRoss. bThese bsolutions bare bbeing bmade bavailable bto binstructors bONLY. b Please
bdo bNOT bcopy bor bdistribute bthis bdocument bto bothers b(even bother binstructors). bPlease
bdo bnot bpost bany bsolutions bon ba bpublicly-available bWeb bsite. bWe’ll bbe bhappy bto
bprovide ba bcopy b(up-to-date) bof bthis bsolution bmanual bourselves bto banyone bwho basks.
Acknowledgments: bOver bthe byears, bseveral bstudents band bcolleagues bhave bhelped bus
bprepare bthis bsolutions bmanual. bSpecial bthanks bgoes bto bHonggang bZhang, bRakesh
bKumar, bPrithula bDhungel, bVijay bAnnapureddy, bYifan bZhou. bAlso bthanks bto ball bthe
breaders bwho bhave bmade bsuggestions band bcorrected berrors.
All bmaterial b© bcopyright b1996-2020 bby bJ.F. bKurose band bK.W. bRoss. bAll brights breserved
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
,Chapter 1 Review Questions
b b b
1. There bis bno bdifference. bThroughout bthis btext, bthe bwords b“host” band b“end
bsystem” bare bused binterchangeably. bEnd bsystems binclude bPCs, bworkstations,
bWeb bservers, bmail bservers, bPDAs, bInternet-connected bgame bconsoles, betc.
2. From bWikipedia: bDiplomatic bprotocol bis bcommonly bdescribed bas ba bset bof
binternational bcourtesy brules. bThese bwell-established band btime-honored brules
bhave bmade bit beasier bfor bnations band bpeople bto blive band bwork btogether. bPart bof
bprotocol bhas balways bbeen bthe backnowledgment bof bthe bhierarchical bstanding bof ball
bpresent. bProtocol brules bare bbased bon bthe bprinciples bof bcivility.
3. Standards bare bimportant bfor bprotocols bso bthat bpeople bcan bcreate bnetworking bsystems
band bproducts bthat binteroperate.
4. 1. bDial-up bmodem bover btelephone bline: bhome; b2. bDSL bover btelephone bline:
bhome bor bsmall boffice; b3. bCable bto bHFC: bhome; b4. b100 bMbps bswitched
bEthernet: benterprise.
5. HFC bbandwidth bis bshared bamong bthe busers. bOn bthe bdownstream bchannel, ball
bpackets bemanate bfrom ba bsingle bsource, bnamely, bthe bhead bend. bThus, bthere bare
bno bcollisions bin bthe bdownstream bchannel.
6. In bmost bAmerican bcities, bthe bcurrent bpossibilities binclude: bdial-up; bDSL; bcable
bmodem; bfiber-to-the-home.
7. Ethernet bLANs bhave btransmission brates bof b10 bMbps, b100 bMbps, b1 bGbps band b10 bGbps.
8. Today, bEthernet bmost bcommonly bruns bover btwisted-pair bcopper bwire. bIt balso bcan brun
bover bfibers boptic blinks.
9. ADSL: bup bto b24 bMbps bdownstream band b2.5 bMbps bupstream, bbandwidth bis
bdedicated; bHFC, brates bup bto b42.8 bMbps band bupstream brates bof bup bto b30.7
bMbps, bbandwidth bis bshared. bFTTH: b2-10Mbps bupload; b10-20 bMbps bdownload;
bbandwidth bis bnot bshared.
10. There bare btwo bpopular bwireless bInternet baccess btechnologies btoday:
a. Wifi b(802.11) bIn ba bwireless bLAN, bwireless busers btransmit/receive
bpackets bto/from ban bbase bstation b(i.e., bwireless baccess bpoint) bwithin ba
bradius bof bfew btens bof bmeters. bThe bbase bstation bis btypically bconnected bto
bthe bwired bInternet band bthus bserves bto bconnect bwireless busers bto bthe
bwired bnetwork.
b. 3G band b4G bwide-area bwireless baccess bnetworks. bIn bthese bsystems,
bpackets bare btransmitted bover bthe bsame bwireless binfrastructure bused bfor
bcellular btelephony, bwith bthe bbase bstation bthus bbeing bmanaged bby ba
btelecommunications bprovider. bThis bprovides bwireless baccess bto busers
bwithin ba bradius bof btens bof bkilometers bof bthe bbase bstation.
11. At btime bt0 bthe bsending bhost bbegins bto btransmit. bAt btime bt1 b= bL/R1, bthe bsending
bhost bcompletes btransmission band bthe bentire bpacket bis breceived bat bthe brouter b(no
bpropagation bdelay). bBecause bthe brouter bhas bthe bentire bpacket bat btime bt1, bit bcan
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
, begin bto btransmit bthe
b
© b2020 bPearson bEducation, bHoboken, bNJ. bAll brights
breserved.
