CWNA Guide to Wireless LANs, Second Edition - Ch5.doc

8/10/2019 CWNA Guide to Wireless LANs, Second Edition - Ch5.doc

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Lab Manual for CWNA Guide to Wireless LANs, Second Edition Lab Manual Solutions 5-

Chapter 5 Solutions

Activity Questions, Lab 5-1

Lab 5.1 Note: The instructor access point kilo-lima should be connected tothe same network as the student access points, but far enough away fromthe classroom so that when the students walk away from their access pointthey will lose connectiity before they can connect to kilo-lima. !recommend connecting one of the student"s access points in the classroomand connecting kilo-lima in another classroom to test this before class. #lso,make sure the instructor access point is connected in a locked classroom oro$ce where it won"t be stolen. The students will need the %#& address ofkilo-lima before this lab.

1'.#re both of your laptops connected to your access point using theTwowap pro(le) *hat is your connected speed) *hat is your !+ address)Answer: Hopefully, yes !aries !aries

1.*hat is displayed in the pop-up window)Answer: "ndication t#at laptop is not connected

1.*hat is displayed in the pop-up window now) *hat is your !+ address)Answer: No$ connected S#ould be t#e sa%e as recorded in &'(

1.*ere you successful)Answer: Hopefully, yes

1/.*hat is your signal strength) *hat is your connected speed)Answer: !aries )aries

Review Questions, Lab 5-1

1. 0ow is signal strength related to mobility)

Answer: Si*nal stren*t# decreases as t#e %obile de)ice %o)es a$ay fro% t#e access point+

. *hat is the bene(t of con(guring the %#& address of the access point inthe client pro(le)Answer: Guarantees you $ill associate $it# t#e correct access point if %ore t#an one access point isusin* t#e sa%e SS"

. !f your !+ address remained the same between access points, why doyou think it did)Answer: ecause t#e access points co%%unicate $it# eac# ot#er on t#e net$or.

. ou walked away from one connection in the lab actiity and associatedwith another. *hy is this not considered true roaming)Answer: /ou lost your connection, and $it# true roa%in* you s#ouldn0t+

5. *hen the signal gets weak, the client deice starts scanning. *hy doesthis happen)Answer: "t is loo.in* for an access point to associate $it#+


Lab 5. Note: The instructor access point kilo-lima should be connected tothe same network as the student access points, and allow the students towalk away from their access point and then connect to kilo-lima without

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losing connectiity. ! recommend connecting one of the student"s accesspoints in the classroom and connecting kilo-lima in another classroom oro$ce to test this before class.

#lso, make sure the instructor access point is connected in a lockedclassroom or o$ce where it won"t be stolen. The students will need the !+

address of the instructor laptop 2kilo or lima3 that is acting as the 4T+serer. ! use &erer because it is free and easy to con(gure, but any 4T+software should work. %ake sure the instructor laptop with the 4T+ softwareis connected wirelessly to kilo-lima. ! hae them sitting side by side for thislab. The 4T+ software should be running and there should be a ery large(le named tournament.ssf 2about 66 %73 on the desktop of the 4T+ serer.#ny ery large (le will do. 8ust make sure you name it tournament.ssf tomatch the lab instructions. The serer software should be con(gured topoint to the desktop as the location for uploads and downloads. #nonymousaccess should be allowed and oerwrite (les should be allowed. Try this labbefore class to make sure your location proides for roaming and that the4T+ software is working.

1. *hat is your !+ address)Answer: !aries

. *ith which access point are you associated) *hat is your !+ address)*hat is your connected speed) *hat is one factor in making thedecision to 9ump to another access point)Answer: 1ilo-li%a Sa%e as recorded in &' S#ould be e2cellent SN3

6. *hat is the reported throughput in kilobytes per second)Answer: !aries

. *hat is the reported throughput in megabits per second)Answer: !aries

;. &alculate the percentage of the rated bandwidth you euired for layer roaming to work)Answer: 4(6

. *hy should we e


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Answer: Scannin*


. *hat is the default power sae mode for your adapter)Answer: CAM

/. *hat di=erences do you see between the % laptop and the 4ast++laptop) ?o you notice any di=erence in L@? actiity on the adapters)Answer: More acti)ity $it# CAM More li*#t acti)ity $it# CAM

. Ance again, compare the actiity onscreen and the L@? actiity on theadapters. &an you tell that %a< ++ mode conseres the most power)Answer: E)en less acti)ity $#en usin* Ma28SM /es

1'.&an you ad9ust the power sae mode on this adapter when you are in adhoc mode)Answer: No


1. *hat three power options are aailable with the &isco #ironet aBbBgwireless adapter)Answer: CAM, 9ast 8S8 %ode, and Ma28SM

. *hich mode o=ers the best throughput and why)Answer: CAM, because t#e adapter is al$ays a$a.e

. *hich mode prolongs the laptop battery the most and why)Answer: Ma28SM, because t#e adapter sleeps t#e %ost

. 0ow would you decide which mode to use for your wireless client)Answer: epends #o$ often your %obile de)ice is $it#out AC po$er

5. *hich mode do you think would be best for a wireless desktop

computer) *hy)Answer: CAM, because you don0t #a)e to $orry about runnin* on t#e battery you al$ays #a)e AC

po$er


;. *hat is the name of the !? you con(gured) *hat type ofauthentication is con(gured for this !?)Answer: !aries pen

1;.*hy did you lose connectiity)Answer: Client profile is for s#ared aut#entication and t#e access point is usin* open aut#entication+

'.?ouble-click the !nfrastructure %ode pro(le to actiate it. ?id you

reconnect)Answer: Hopefully, yes


1. *hat are the two authentication methods re>uired by the '.11standard)Answer: pen and s#ared .ey


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. *hich of these two authentication methods is considered more secure,and why)Answer: pen, because s#ared .ey s#ares t#e .ey in bot# encrypted and unencrypted for%, *i)in*

t#e attac.er enou*# infor%ation to brea. t#e .ey

. *hat are the two *@+ key strengths currently supported by '.11)Answer: ;(-bit and '4?-bit


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fragmentation setting would you recommend on your system if audiostreaming is fre>uently used)Answer: "ncrease decreases errors #opefully support )aries


1. *hat is the ma

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CWNA Guide to Wireless LANs, Second Edition - Ch5.doc