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CCNA FAQ Virtual LANs

CCNA FAQ Virtual LANs

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CCNA FAQ Virtual LANs

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  1. www.ConfigRouter.com CCNA​​FAQ:​​Virtual​​LANs Q1.​​In​​a​​LAN,​​which​​of​​the​​following​​terms​​best​​equates​​to​​the​​term​​VLAN? a.​​Collision​​domain b.​​Broadcast​​domain c.​​Subnet​​domain d.​​Single​​switch e.​​Trunk Answer:​​B http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q2.​​Imagine​​a​​switch​​with​​three​​configured​​VLANs.​​How​​many​​IP​​subnets​​are​​required, assuming​​that​​all​​hosts​​in​​all​​VLANs​​want​​to​​use​​TCP/IP? a.​​0 b.​​1 c.​​2 d.​​3 e.​​You​​can’t​​tell​​from​​the​​information​​provided. Answer:​​D.​​Although​​a​​subnet​​and​​a​​VLAN​​are​​not​​equivalent​​concepts,​​the​​devices​​in​​one VLAN​​are​​typically​​in​​the​​same​​subnet,​​and​​vice​​versa. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q3.​​Which​​of​​the​​following​​fully​​encapsulates​​the​​original​​Ethernet​​frame​​in​​a​​trunking​​header rather​​than​​inserting​​another​​header​​inside​​the​​original​​Ethernet​​header? a.​​VTP b.​​ISL c.​​802.1Q d.​​Both​​ISL​​and​​802.1Q e.​​None​​of​​the​​other​​answers​​are​​correct. Answer:​​B http://www.configrouter.com/ccna-faq-virtual-lans-7266/ https://configrouternotes.blogspot.in  https://configrouter.tumblr.com/  https://in.pinterest.com/phaniconfig/ccna-online-training/  https://configrouternotes.wordpress.com/  https://twitter.com/PhaniConfig 

  2. www.ConfigRouter.com https://trello.com/configrouter  http://flip.it/y5znjX  https://www.reddit.com/user/phani_config/  https://www.scoop.it/t/ccna-exam-answers  http://feeds.feedburner.com/ConfigRouter    CCNA​ ​200-125​ ​Dump​ ​With​ ​Questions​ ​​ ​and​ ​Answers​ ​with​ ​Explanation  CCNA​ ​NetAcad​ ​Training  CCNA​ ​RS​ ​Training  CCNA​ ​Cyber​ ​Ops​ ​Training  CCNA​ ​Data​ ​Center​ ​Training  CCNA​ ​Security​ ​Training https://www.youtube.com/c/CiscoNetworkingVideos Nexus​​OS​​Basics​​and​​Fundamentals​​Complete​​Video​​Course https://www.youtube.com/watch?v=pwn0sT4pOEo&list=PL9UP_4zHScPw49YXOCkK9UFRbPP S55RD2 CCNA​​Cyber​​Ops​​SECFND​​210-250​​Complete​​Video​​Course https://www.youtube.com/watch?v=eT88kco4u5M&list=PL9UP_4zHScPxTqWXRTbTHOUZ4IH BfItpZ CCNA​​Wireless​​200-355​​Complete​​Video​​Course https://www.youtube.com/watch?v=yNnGavnlTZ0&list=PL9UP_4zHScPweZMvKm2mhucuF0X- kO5jV CCNA​​Cloud​​CLDADM​​210-455​​Complete​​Video​​Course https://www.youtube.com/watch?v=GjD27VyOYEQ&list=PL9UP_4zHScPz35gaincmzptwnH1cB M8Oj CCNA​​Data​​Center​​DCICT​​200-155​​Complete​​Video​​Course https://www.youtube.com/watch?v=QMe8ZgviyZ4&list=PL9UP_4zHScPwrrIVgNHW8c2weI-pIgF DL CCNA​​Data​​Center​​DCICN​​200-150​​Complete​​Video​​Course https://www.youtube.com/watch?v=VAJv3C4BgjE&list=PL9UP_4zHScPyjupWBcyODSaJjlR7Se Ik- CCNA​​Cloud​​CLDFND​​200-451​​Complete​​Video​​Course https://www.youtube.com/watch?v=C3SdnXLAA7M&list=PL9UP_4zHScPy8PX3z55iFF0rW66n- 1PDf

  3. www.ConfigRouter.com Q4.​​Which​​of​​the​​following​​adds​​the​​trunking​​header​​for​​all​​VLANs​​except​​one? a.​​VTP b.​​ISL c.​​802.1Q d.​​Both​​ISL​​and​​802.1Q e.​​None​​of​​the​​other​​answers​​are​​correct. Answer:​​C http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q​​5.​​Which​​of​​the​​following​​VTP​​modes​​allow​​VLANs​​to​​be​​configured​​on​​a​​switch?​​(Choose​​two answers.) a.​​Client b.​​Server c.​​Transparent d.​​Dynamic e.​​None​​of​​the​​other​​answers​​are​​correct. Answer:​​B​​and​​C http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q6.​​Imagine​​that​​you​​are​​told​​that​​switch​​1​​is​​configured​​with​​the​​auto​​parameter​​fortrunking​​on its​​Fa0/5​​interface,​​which​​is​​connected​​to​​switch​​2.​​You​​have​​to​​configure​​switch​​2.​​Which​​of​​the following​​settings​​for​​trunking​​could​​allow​​trunking​​to​​work?​​(Choose​​two​​answers.) a.​​Trunking​​turned​​on b.​​Auto c.​​Desirable d.​​Access e.​​None​​of​​the​​other​​answers​​are​​correct. Explanation:​​A​​and​​C.​​The​​auto​​setting​​means​​that​​the​​switch​​can​​negotiate​​trunking,​​but​​it​​can only​​respond​​to​​negotiation​​messages,​​and​​it​​cannot​​initiate​​the​​negotiation​​process.​​So,​​the other​​switch​​must​​be​​configured​​to​​trunk​​or​​to​​initiate​​the​​negotiation​​process​​(based​​on​​being configured​​with​​the​​dynamic​​desirable​​option.) http://www.configrouter.com/ccna-faq-virtual-lans-7266/VV Q7.​​A​​switch​​has​​just​​arrived​​from​​Cisco.​​The​​switch​​has​​never​​been​​configured​​with​​any VLANs,​​VTP​​configuration,​​or​​any​​other​​configuration.​​An​​engineer​​gets​​into​​configuration​​mode and​​issues​​the​​vlan​​22​​command,​​followed​​by​​the​​name​​HannahsVLAN​​command.​​Which​​of​​the

  4. www.ConfigRouter.com following​​are​​true? a.​​VLAN​​22​​is​​listed​​in​​the​​output​​of​​the​​show​​vlan​​brief​​command. b.​​VLAN​​22​​is​​listed​​in​​the​​output​​of​​the​​show​​running-config​​command. c.​​VLAN​​22​​is​​not​​created​​by​​this​​process. d.​​VLAN​​22​​does​​not​​exist​​in​​that​​switch​​until​​at​​least​​one​​interface​​is​​assigned​​to that​​VLAN. Explanation:​​A.​​The​​default​​VTP​​setting​​of​​VTP​​server​​mode​​means​​that​​the​​switch​​can configureVLANs,​​so​​the​​VLAN​​is​​configured.​​However,​​being​​in​​server​​mode,​​the​​configuration commands​​only​​show​​up​​in​​the​​show​​vlan​​brief​​command​​output,​​and​​are​​not​​listed​​as​​part​​of the​​running-config​​file. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q8.​​Which​​of​​the​​following​​commands​​list​​the​​operational​​state​​of​​interface​​Gigabit​​0/1​​in​​regard to​​VLAN​​trunking?​​(Choose​​two​​answers.) a.​​show​​interfaces​​gi0/1 b.​​show​​interfaces​​gi0/1​​switchport c.​​show​​interfaces​​gi0/1​​trunk d.​​show​​trunks Answer:​​B​​and​​C http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q9.​​An​​engineer​​has​​just​​installed​​four​​new​​2960​​switches​​and​​connected​​the​​switches​​to​​each other​​using​​crossover​​cables.​​All​​the​​interfaces​​are​​in​​an​​“up​​and​​up”​​state.​​The​​engineer configures​​each​​switch​​with​​the​​VTP​​domain​​name​​Fred​​and​​leaves​​all​​four​​switches​​in​​VTP server​​mode.​​The​​engineer​​adds​​VLAN​​33​​at​​9:00​​a.m.,​​and​​then​​within​​30​​seconds,​​issues​​a show​​vlan​​brief​​command​​on​​the​​other​​three​​switches,​​but​​does​​not​​find​​VLAN​​33​​on​​the​​other three​​switches.​​Which​​answer​​gives​​the​​most​​likely​​reason​​for​​the​​problem​​in​​this​​case? a.​​VTP​​requires​​that​​all​​switches​​have​​the​​same​​VTP​​password. b.​​The​​engineer​​should​​have​​been​​more​​patient​​and​​waited​​for​​SW1​​to​​send​​its​​next periodic​​VTP​​update. c.​​None​​of​​the​​links​​between​​the​​switches​​trunk​​because​​of​​the​​default​​2960​​trunking administrative​​mode​​of​​auto. d.​​None​​of​​the​​other​​answers​​are​​correct. Explanation:​​C.​​VTP​​does​​not​​require​​a​​password,​​although​​if​​a​​password​​is​​used,​​the​​password must​​match.​​VTP​​sends​​VTP​​updates​​immediately​​after​​a​​VLAN​​database​​change.​​However, VTP​​only​​sends​​VTP​​messages​​over​​trunks,​​and​​2960s​​default​​to​​using​​a​​trunking administrative​​mode​​of​​auto,​​which​​does​​not​​initiate​​the​​trunking​​negotiation​​process.​​So​​none​​of the​​switches​​automatically​​form​​a​​trunk,​​and​​no​​VTP​​messages​​are​​sent.

  5. www.ConfigRouter.com http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q10.​​Switches​​SW1​​and​​SW2​​connect​​through​​an​​operational​​trunk.​​The​​engineer​​wants​​to​​use VTP​​to​​communicate​​VLAN​​configuration​​changes.​​The​​engineer​​configures​​a​​new​​VLAN​​on SW1,​​VLAN​​44,​​but​​SW2​​does​​not​​learn​​about​​the​​new​​VLAN.​​Which​​of​​the​​following configuration​​settings​​on​​SW1​​and​​SW2​​would​​not​​be​​a​​potential​​root​​cause​​why​​SW2​​does​​not learn​​about​​VLAN​​44?​​(Choose​​two​​answers.) a.​​VTP​​domain​​names​​of​​larry​​and​​LARRY,​​respectively b.​​VTP​​passwords​​of​​bob​​and​​BOB,​​respectively c.​​VTP​​pruning​​enabled​​and​​disabled,​​respectively d.​​VTP​​modes​​of​​server​​and​​client,​​respectively Explanation:​​C​​and​​D.​​The​​domain​​name​​and​​password​​must​​be​​equal,​​and​​the​​switches​​must connect​​using​​a​​trunk​​before​​VTP​​will​​work.​​It​​is​​normal​​to​​have​​some​​switches​​as​​servers​​and some​​as​​clients.​​A​​mismatched​​pruning​​configuration​​setting​​does​​not​​prevent​​the synchronization​​of​​VLAN​​databases. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q11.​​What​​are​​the​​characteristics​​of​​VLANs? Answer:​​VLANs​​are​​created​​in​​switches​​to​​segment​​broadcast​​domains​​at​​Layer​​2.​​Departments in​​your​​organization​​can​​be​​assigned​​their​​own​​VLAN,​​which​​provides​​a​​logical​​segmentation​​in which​​traffic​​from​​one​​department​​does​​not​​interfere​​with​​that​​of​​another​​department.​​VLANs can​​span​​multiple​​switches,​​which​​simplifies​​administration​​when​​users​​need​​to​​move throughout​​the​​switched​​network. Q12.​​What​​are​​trunks​​and​​how​​do​​they​​work? Answer:​​Trunks​​are​​used​​to​​carry​​VLAN​​traffic​​from​​one​​switch​​to​​another​​switch.​​Frames​​are tagged​​with​​a​​VLAN​​identifier​​as​​they​​traverse​​the​​trunk​​link​​and​​are​​removed​​on​​the​​receiving switch.​​ISL​​is​​a​​Cisco​​proprietary​​method​​of​​trunking​​in​​which​​the​​original​​frame​​is​​encapsulated with​​a​​26-byte​​header​​and​​a​​4-byte​​CRC.​​IEEE​​802.1q​​trunks​​insert​​a​​4-byte​​VLAN​​identifier inside​​the​​ethernet​​frame. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q13.​​What​​is​​the​​purpose​​of​​VTP? Answer:​​VTP​​is​​a​​convenient​​Cisco​​proprietary​​Layer​​2​​protocol​​that​​enables​​switches​​to advertise​​VLAN​​configuration​​information​​to​​other​​switches​​in​​a​​VTP​​domain. http://www.configrouter.com/ccna-faq-virtual-lans-7266/

  6. www.ConfigRouter.com Q14.​​What​​are​​the​​characteristics​​of​​the​​three​​VTP​​modes? Answer:​​Server​​mode​​is​​the​​default​​VTP​​mode​​in​​which​​VTP​​advertisements​​are​​sent​​to​​other switches​​in​​the​​VTP​​domain.​​VLAN​​configurations​​in​​server​​mode​​are​​saved​​to​​the​​VLAN database. Client​​mode​​processes​​and​​forwards​​VTP​​advertisements​​from​​the​​VTP​​server.​​You​​cannot change​​any​​VLAN​​configurations​​or​​save​​the​​VLAN​​configuration​​in​​client​​mode. Transparent​​mode​​also​​forwards​​VTP​​advertisements​​from​​the​​VTP​​server;​​however,​​switches in​​transparent​​mode​​do​​not​​process​​the​​VTP​​advertisements.​​In​​transparent​​mode,​​you​​can configure​​VLANs​​and​​save​​them​​to​​NVRAM;​​however,​​these​​local​​VLANs​​are​​not​​advertised​​to other​​switches​​in​​the​​VTP​​domain. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q15.​​Why​​is​​router-on-a-stick​​sometimes​​necessary​​in​​switched​​environments? Answer:​​Router-on-a-stick​​is​​used​​when​​you​​want​​to​​allow​​traffic​​from​​one​​VLAN​​to​​be​​routed into​​another​​VLAN.​​Router-on-a-stick​​requires​​a​​switch​​to​​trunk​​to​​a​​Layer​​3​​router.​​The​​router uses​​subinterfaces​​to​​logically​​separate​​the​​VLANs​​into​​virtual​​interfaces​​in​​which​​the​​router​​can route​​in​​between. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q16.​​Given​​the​​following​​output,​​which​​two​​facts​​can​​be​​determined?​​(Choose​​2.) SwitchA>show​​vtp​​status VTP​​Version​​:​​2 Configuration​​Revision​​:​​45 Maximum​​VLANs​​supported​​locally​​:​​1005 Number​​of​​existing​​VLANs​​:​​10 VTP​​Operating​​Mode​​:​​Server VTP​​Domain​​Name​​:​​Examprep VTP​​Pruning​​Mode​​:​​Enabled VTP​​V2​​Mode​​:​​Disabled VTP​​Traps​​Generation​​:​​Disabled MD5​​digest​​:​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7 SwitchB>show​​vtp​​status VTP​​Version​​:​​2 Configuration​​Revision​​:​​45 Maximum​​VLANs​​supported​​locally​​:​​1005

  7. www.ConfigRouter.com Number​​of​​existing​​VLANs​​:​​10 VTP​​Operating​​Mode​​:​​Client VTP​​Domain​​Name​​:​​ExamPrep VTP​​Pruning​​Mode​​:​​Enabled VTP​​V2​​Mode​​:​​Disabled VTP​​Traps​​Generation​​:​​Disabled MD5​​digest​​:​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 SwitchA>show​​vtp​​status VTP​​Version​​:​​2 Configuration​​Revision​​:​​45 Maximum​​VLANs​​supported​​locally​​:​​1005 Number​​of​​existing​​VLANs​​:​​10 VTP​​Operating​​Mode​​:​​Server VTP​​Domain​​Name​​:​​Examprep VTP​​Pruning​​Mode​​:​​Enabled VTP​​V2​​Mode​​:​​Disabled VTP​​Traps​​Generation​​:​​Disabled MD5​​digest​​:​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7 SwitchB>show​​vtp​​status VTP​​Version​​:​​2

  8. www.ConfigRouter.com Configuration​​Revision​​:​​45 Maximum​​VLANs​​supported​​locally​​:​​1005 Number​​of​​existing​​VLANs​​:​​10 VTP​​Operating​​Mode​​:​​Client VTP​​Domain​​Name​​:​​ExamPrep VTP​​Pruning​​Mode​​:​​Enabled VTP​​V2​​Mode​​:​​Disabled VTP​​Traps​​Generation​​:​​Disabled MD5​​digest​​:​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7 A.​​This​​switch​​will​​save​​VLAN​​information​​into​​NVRAM. B.​​This​​switch​​will​​synchronize​​its​​VLAN​​database​​with​​updates​​starting​​with​​number​​46​​or above. C.​​This​​switch​​can​​add,​​change,​​and​​delete​​VLANs. D.​​This​​switch​​passes​​VTP​​advertisements​​from​​the​​server. Answer:​​B,​​D.​​Because​​this​​switch​​is​​operating​​in​​client​​mode,​​it​​synchronizes​​with​​updates received​​from​​the​​VTP​​server​​as​​long​​as​​the​​revision​​number​​is​​greater​​than​​its​​current​​revision number.​​It​​passes​​the​​advertisements​​from​​the​​VTP​​server​​to​​other​​switches​​in​​the​​VTP​​domain. Answer​​A​​is​​incorrect​​because​​client​​mode​​switches​​do​​not​​save​​their​​VLAN​​information​​into NVRAM.​​Answer​​C​​is​​incorrect​​because​​you​​cannot​​add,​​change,​​or​​delete​​VLANs​​in​​client mode. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q17.​​Considering​​the​​following​​output: Switch>show​​vlan VLAN Name Status Ports -​​-​​-​​--​​-​​-​​-​​--​​-​​-​​-​​--​​-​​-​​--​​-​​-​​--​​-​​-​​--​​-​​-​​-​​--​​-​​- 1 default active Fa0/1,​​Fa0/2,​​Fa0/3,​​Fa0/4, ​​​​​​​​​​​​Fa0/5,Fa0/6,​​Fa0/7,​​Fa0/8,​​Fa0/9 2 VLAN0002 active 100 ExamCram active 200 ExamPrep active 1 2 3 4 5 6 7 8

  9. www.ConfigRouter.com Switch>show​​vlan VLAN Name -​​-​​-​​--​​-​​-​​-​​--​​-​​-​​-​​--​​-​​-​​--​​-​​-​​--​​-​​-​​--​​-​​-​​-​​--​​-​​- 1 default ​​​​​​​​​​​​Fa0/5,Fa0/6,​​Fa0/7,​​Fa0/8,​​Fa0/9 2 VLAN0002 100 ExamCram 200 ExamPrep Which​​of​​the​​following​​is​​false? A.​​Interfaces​​Fast​​Ethernet​​0/1–0/9​​are​​in​​the​​management​​domain. B.​​Interfaces​​above​​Fast​​Ethernet​​0/10​​could​​be​​configured​​as​​a​​trunk. C.​​Interface​​Fast​​Ethernet​​0/10​​is​​an​​access​​port. D.​​VLAN​​2​​was​​not​​configured​​with​​a​​custom​​name. Answer:​​C.​​Interface​​Fast​​Ethernet​​0/10​​could​​not​​be​​an​​access​​port,​​or​​it​​would​​be​​included​​in the​​list​​of​​interfaces​​assigned​​to​​a​​VLAN.​​Answer​​A​​is​​true​​because​​they​​are​​all​​assigned​​to VLAN​​1.​​Answer​​B​​is​​true​​because​​the​​interface​​number​​does​​not​​show​​up​​in​​the​​show​​vlan output​​if​​it​​is​​a​​trunk.​​D​​is​​true​​because​​the​​VLAN​​name​​is​​VLAN0002,​​which​​is​​the​​default naming​​convention​​the​​IOS​​uses​​when​​a​​name​​isn’t​​configured​​for​​a​​specific​​VLAN. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ ​​Q18.​​Which​​of​​the​​following​​VTP​​modes​​save​​their​​VLAN​​information​​to​​NVRAM?​​(Choose​​2.) A.​​Transport B.​​Client C.​​Server D.​​Transparent Answer:​​C,​​D.​​Server​​and​​Transparent​​VTP​​modes​​are​​the​​only​​modes​​that​​save​​their​​VLAN configuration​​to​​NVRAM.​​Answer​​A​​is​​incorrect​​because​​Transport​​is​​not​​a​​VTP​​mode.​​Answer B​​is​​incorrect​​because​​switches​​operating​​in​​Client​​mode​​do​​not​​save​​their​​VLAN​​information​​in NVRAM. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q19.​​Which​​is​​not​​a​​characteristic​​of​​VLANs? A.​​Users​​can​​be​​moved​​easily​​because​​VLANs​​span​​multiple​​switches. B.​​Users​​can​​be​​logically​​grouped​​according​​to​​their​​departments. C.​​There​​is​​a​​separate​​instance​​of​​STP​​for​​each​​VLAN​​. D.​​Broadcasts​​are​​not​​forwarded​​over​​trunks. Answer:​​D.​​Broadcasts​​will​​still​​be​​forwarded​​over​​trunks​​to​​other​​switches​​in​​the​​same​​VLAN. Broadcasts​​in​​one​​VLAN,​​however,​​do​​not​​affect​​other​​VLANs.​​Answers​​A,​​B,​​and​​C​​are​​all Status Ports active Fa0/1,​​Fa0/2,​​Fa0/3,​​Fa0/4, active active active

  10. www.ConfigRouter.com characteristics​​that​​apply​​to​​VLANs. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q20.​​You​​want​​to​​connect​​your​​Cisco​​Catalyst​​switch​​to​​a​​Nortel​​switch.​​Which​​of​​the​​following is​​true? A.​​802.1q​​trunks​​should​​be​​used. B.​​ISL​​trunks​​should​​be​​used. C.​​VLAN​​configurations​​will​​be​​accepted​​by​​the​​Nortel​​switch​​if​​it​​is​​in​​VTP​​client​​mode. D.​​Cisco​​is​​the​​only​​switch​​that​​can​​configure​​VLANs. Answer:​​A.​​Because​​you​​are​​connecting​​to​​a​​Nortel​​switch,​​you​​must​​use​​a​​standard​​method​​of trunking​​(IEEE​​802.1q).​​ISL​​and​​VTP​​are​​Cisco​​proprietary​​functions.​​Answer​​B​​is​​incorrect because​​ISL​​is​​a​​Cisco​​proprietary​​trunk​​encapsulation.​​Answer​​C​​is​​incorrect​​because​​VTP​​is​​a Cisco​​proprietary​​protocol.​​Answer​​D​​is​​false​​because​​other​​switch​​manufacturers​​support​​VLAN configurations. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q21.​​Which​​of​​the​​following​​would​​cause​​VLAN​​leakage? A.​​Incorrect​​ISL​​configuration. B.​​Native​​VLAN​​mismatch. C.​​VTP​​passwords​​don’t​​match. D.​​Saggy​​VLAN​​diapers. Answer:​​B.​​VLAN​​leakage​​occurs​​when​​there​​is​​a​​VLAN​​mismatch​​on​​a​​trunk​​link​​with​​802.1q. Answer​​A​​is​​incorrect​​because​​ISL​​does​​not​​use​​native​​VLANs.​​Answer​​C​​is​​incorrect​​because VTP​​does​​not​​affect​​VLAN​​leakage.​​Answer​​D​​is​​incorrect​​because​​switches​​don’t​​wear​​diapers. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q22.​​Given​​the​​following​​output​​from​​two​​switches,​​why​​are​​the​​VLAN​​databases​​not synchronized? SwitchA>show​​vtp​​status VTP​​Version :​​2 Configuration​​Revision :​​45 Maximum​​VLANs​​supported​​locally​​:​​1005 Number​​of​​existing​​VLANs :​​10 VTP​​Operating​​Mode :​​Server VTP​​Domain​​Name :​​Examprep VTP​​Pruning​​Mode :​​Enabled

  11. www.ConfigRouter.com VTP​​V2​​Mode VTP​​Traps​​Generation MD5​​digest SwitchB>show​​vtp​​status VTP​​Version Configuration​​Revision Maximum​​VLANs​​supported​​locally​​:​​1005 Number​​of​​existing​​VLANs VTP​​Operating​​Mode VTP​​Domain​​Name VTP​​Pruning​​Mode VTP​​V2​​Mode VTP​​Traps​​Generation MD5​​digest 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 SwitchA>show​​vtp​​status VTP​​Version Configuration​​Revision Maximum​​VLANs​​supported​​locally​​:​​1005 Number​​of​​existing​​VLANs :​​Disabled :​​Disabled :​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7 :​​2 :​​45 :​​10 :​​Client :​​ExamPrep :​​Enabled :​​Disabled :​​Disabled :​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7 :​​2 :​​45 :​​10

  12. www.ConfigRouter.com VTP​​Operating​​Mode VTP​​Domain​​Name VTP​​Pruning​​Mode VTP​​V2​​Mode VTP​​Traps​​Generation MD5​​digest SwitchB>show​​vtp​​status VTP​​Version Configuration​​Revision Maximum​​VLANs​​supported​​locally​​:​​1005 Number​​of​​existing​​VLANs VTP​​Operating​​Mode VTP​​Domain​​Name VTP​​Pruning​​Mode VTP​​V2​​Mode VTP​​Traps​​Generation MD5​​digest A.​​VTP​​versions​​are​​incorrect. B.​​Passwords​​do​​not​​match. C.​​Both​​devices​​should​​be​​set​​to​​server​​mode. D.​​VTP​​domains​​do​​not​​match. Answer:​​D.​​The​​domain​​names​​are​​case​​sensitive.​​If​​they​​do​​not​​match,​​the​​switches​​cannot synchronize​​their​​VLAN​​database​​information.​​Answer​​A​​is​​incorrect​​because​​both​​switches​​are operating​​in​​the​​same​​VPT​​version.​​Based​​upon​​the​​fact​​that​​the​​MD5​​digest​​of​​the​​VTP password​​is​​identical,​​Answer​​B​​is​​incorrect.​​Answer​​C​​is​​incorrect​​because​​both​​switches​​do not​​need​​to​​be​​in​​server​​mode​​in​​order​​for​​the​​switches​​to​​exchange​​VLAN​​configurations​​via VTP. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q23.​​What​​can​​be​​determined​​from​​the​​following​​output? Switch>show​​interface​​trunk Port ​​Mode ​​Encapsulation Status​​Native​​vlan Fa0/24​​on​​802.1q ​​trunking 1 Port ​​Vlans​​allowed​​on​​trunk Fa0/24 1-4094 Port Vlans​​allowed​​and​​active​​in​​management​​domain :​​Server :​​Examprep :​​Enabled :​​Disabled :​​Disabled :​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7 :​​2 :​​45 :​​10 :​​Client :​​ExamPrep :​​Enabled :​​Disabled :​​Disabled :​​0xCC​​0x69​​0x27​​0x01​​0xC8​​0xA8​​0x59​​0xD7

  13. www.ConfigRouter.com Fa0/24 Port Fa0/24 1 2 3 4 5 6 7 8 9 10 11 12 Switch>show​​interface​​trunk Port ​​Mode Fa0/24​​on​​802.1q Port ​​Vlans​​allowed​​on​​trunk Fa0/24 Port Vlans​​allowed​​and​​active​​in​​management​​domain Fa0/24 1-4,100,200 Port Vlans​​in​​spanning​​tree​​forwarding​​state​​and​​not​​pruned Fa0/24 ​​1-4,100,200 A.​​The​​trunk​​is​​proprietary​​to​​Cisco. B.​​Ethernet​​frames​​from​​VLAN​​1​​will​​not​​be​​tagged​​over​​the​​trunk. C.​​This​​trunk​​will​​create​​giant​​frames​​that​​will​​be​​dropped​​by​​non-Cisco​​devices. D.​​Ethernet​​frames​​are​​being​​encapsulated​​with​​a​​30-byte​​VLAN​​ID. Answer:​​B.​​Because​​the​​trunk​​is​​802.1q​​with​​a​​native​​VLAN​​of​​1,​​ethernet​​frames​​originating from​​VLAN​​1​​going​​over​​this​​trunk​​are​​not​​tagged.​​Answers​​A,​​C,​​and​​D​​are​​incorrect​​because they​​are​​characteristics​​of​​ISL. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q24.​​How​​do​​you​​associate​​VLANs​​to​​an​​interface​​in​​a​​router-on-a-stick​​configuration? A.​​By​​creating​​a​​VLAN​​interface​​in​​the​​switch. B.​​By​​creating​​the​​subinterface​​number​​to​​match​​the​​VLAN. C.​​By​​having​​a​​separate​​physical​​interface​​for​​each​​VLAN. 1-4,100,200 Vlans​​in​​spanning​​tree​​forwarding​​state​​and​​not​​pruned ​​1-4,100,200 ​​Encapsulation ​​trunking Status​​Native​​vlan 1 1-4094

  14. www.ConfigRouter.com D.​​By​​using​​the​​encapsulation​​command. Answer:​​D.​​The​​encapsulation​​command​​is​​used​​to​​assign​​VLANs​​to​​a​​subinterface.​​Answer​​A is​​incorrect​​because​​SVIs​​are​​in​​Layer​​3​​switches,​​not​​external​​routers.​​Answer​​B​​is​​a​​good design​​practice,​​but​​does​​not​​assign​​the​​VLANs​​to​​the​​subinterface.​​Answer​​C​​is​​incorrect because​​routeron-a-stick​​is​​over​​one​​interface. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q25.​​Which​​of​​the​​following​​is​​not​​a​​characteristic​​of​​router-on-a-stick? A.​​The​​interface​​must​​be​​10Mbps​​or​​higher. B.​​The​​link​​must​​be​​a​​trunk. C.​​Subinterfaces​​are​​used​​to​​route​​in​​between​​the​​VLANs. D.​​The​​IP​​address​​assigned​​is​​used​​as​​the​​VLAN’s​​default​​gateway. Answer:​​A.​​Because​​the​​interface​​must​​be​​a​​trunk,​​the​​speed​​of​​the​​link​​should​​be​​100Mbps​​or greater. Answers​​B,​​C,​​and​​D​​are​​all​​characteristics​​of​​router-on-a-stick. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​26.​​Which​​of​​the​​following​​statements​​is​​true​​with​​regard​​to​​VLANs? A.​​VLANs​​greatly​​reduce​​network​​security. B.​​VLANs​​increase​​the​​number​​of​​collision​​domains​​while​​decreasing​​their​​size. C.​​VLANs​​decrease​​the​​number​​of​​broadcast​​domains​​while​​decreasing​​their​​size. D.​​Network​​adds,​​moves,​​and​​changes​​are​​achieved​​with​​ease​​by​​just​​configuring​​a​​port​​into​​the appropriate​​VLAN. Answer:​​D.​​Here’s​​a​​list​​of​​ways​​VLANs​​simplify​​network​​management: Network​​adds,​​moves,​​and​​changes​​are​​achieved​​with​​ease​​by​​just​​configuring​​a​​port​​into​​the appropriate​​VLAN. A​​group​​of​​users​​that​​need​​an​​unusually​​high​​level​​of​​security​​can​​be​​put​​into​​its​​own​​VLAN​​so that​​users​​outside​​of​​the​​VLAN​​can’t​​communicate​​with​​them. As​​a​​logical​​grouping​​of​​users​​by​​function,​​VLANs​​can​​be​​considered​​independent​​from​​their physical​​or​​geographic​​locations. VLANs​​greatly​​enhance​​network​​security​​if​​implemented​​correctly. VLANs​​increase​​the​​number​​of​​broadcast​​domains​​while​​decreasing​​their​​size. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​27.​​Write​​the​​command​​that​​must​​be​​present​​for​​this​​layer​​3​​switch​​to​​provide inter-VLAN​​routing​​between​​the​​two​​VLANs​​created​​with​​these​​commands: ccna-faq-virtual-lans-2

  15. www.ConfigRouter.com Answer:​​ip​​routing​​Routing​​must​​be​​enabled​​on​​the​​layer​​3​​switch. Question.​​In​​the​​diagram,​​how​​must​​the​​port​​on​​each​​end​​of​​the​​line​​be​​configured​​to​​carry​​traffic between​​the​​two​​hosts​​in​​the​​Sales​​VLAN? ccna-faq-virtual-lans-3 A.​​Access​​port B.​​10​​GB C.​​Trunk D.​​Spanning http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​28.​​What​​is​​the​​only​​type​​of​​second​​VLAN​​of​​which​​an​​access​​port​​can​​be​​a​​member? A.​​Secondary B.​​Voice C.​​Primary D.​​Trunk Answer:​​B.​​While​​in​​all​​other​​cases​​access​​ports​​can​​be​​a​​member​​of​​only​​one​​VLAN,​​most switches​​will​​allow​​you​​to​​add​​a​​second​​VLAN​​to​​an​​access​​port​​on​​a​​switch​​port​​for​​your​​voice traffi;​​it’s​​called​​the​​voice​​VLAN.​​The​​voice​​VLAN​​used​​to​​be​​called​​the​​auxiliary​​VLAN,​​which allowed​​it​​to​​be​​overlaid​​on​​top​​of​​the​​data​​VLAN,​​enabling​​both​​types​​of​​traffi​​through​​the​​same port. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​29.​​In​​the​​following​​configuration,​​what​​command​​is​​missing​​in​​the​​creation​​of​​the VLAN​​interface? ccna-faq-virtual-lans-5 A.​​no​​shutdown​​under​​int​​vlan​​1 B.​​encapsulation​​dot1q​​1​​under​​int​​vlan​​1 C.​​switchport​​access​​vlan​​1 D.​​passive-interface Answer:​​A.​​Yes,​​you​​have​​to​​do​​a​​no​​shutdown​​on​​the​​VLAN​​interface. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​30.​​Which​​of​​the​​following​​statements​​is​​true​​with​​regard​​to​​ISL​​and​​802.1q? A.​​802.1q​​encapsulates​​the​​frame​​with​​control​​information;​​ISL​​inserts​​an​​ISL​​field​​along​​with​​tag control​​information. B.​​802.1q​​is​​Cisco​​proprietary.

  16. www.ConfigRouter.com C.​​ISL​​encapsulates​​the​​frame​​with​​control​​information;​​802.1q​​inserts​​an​​802.1q​​field​​along​​with tag​​control​​information. D.​​ISL​​is​​a​​standard. Answer:​​C.​​Unlike​​ISL​​which​​encapsulates​​the​​frame​​with​​control​​information,​​802.1q​​inserts​​an 802.1q​​fild​​along​​with​​tag​​control​​information. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​31.​​What​​concept​​is​​depicted​​in​​the​​diagram? ccna-faq-virtual-lans-7 A.​​Multiprotocol​​routing B.​​Passive​​interface C.​​Gateway​​redundancy D.​​Router​​on​​a​​stick Answer:​​D.​​Instead​​of​​using​​a​​router​​interface​​for​​each​​VLAN,​​you​​can​​use​​one​​FastEthernet interface​​and​​run​​ISL​​or​​802.1q​​trunking.​​This​​allows​​all​​VLANs​​to​​communicate​​through​​one interface.​​Cisco​​calls​​this​​a​​“router​​on​​a​​stick.” http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​32.​​Write​​the​​command​​that​​places​​an​​interface​​into​​VLAN​​2.​​Write​​only​​the​​command and​​not​​the​​prompt. Answer:​​switchport​​access​​vlan​​2​​This​​command​​is​​executed​​under​​the​​interface​​(switch​​port) that​​is​​being​​placed​​in​​the​​VLAN. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​33.​​Write​​the​​command​​that​​generated​​the​​following​​output: Answer:​​show​​vlan​​After​​you​​create​​the​​VLANs​​that​​you​​want,​​you​​can​​use​​the​​show​​vlan command​​to​​check​​them​​out. Question​​34.​​Based​​on​​the​​configuration​​shown​​below,​​what​​statement​​is​​true? S1(config)#ip​​routing S1(config)#int​​vlan​​10 S1(config-if)#ip​​address​​192.168.10.1​​255.255.255.0 S1(config-if)#int​​vlan​​20 S1(config-if)#ip​​address​​192.168.20.1​​255.255.255.0 A.​​This​​is​​a​​multilayer​​switch. B.​​The​​two​​VLANs​​are​​in​​the​​same​​subnet. C.​​Encapsulation​​must​​be​​configured.

  17. www.ConfigRouter.com D.​​VLAN​​10​​is​​the​​management​​VLAN. Answer:​​A.​​With​​a​​multilayer​​switch,​​enable​​IP​​routing​​and​​create​​one​​logical​​interface​​for​​each VLAN​​using​​the​​interface​​vlan​​number​​command​​and​​you’re​​now​​doing​​inter-VLAN​​routing​​on the​​backplane​​of​​the​​switch! http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​35.​​What​​is​​true​​of​​the​​output​​shown​​below? ccna-faq-virtual-lans-12 A.​​Interface​​F0/15​​is​​a​​trunk​​port. B.​​Interface​​F0/17​​is​​an​​access​​port. C.​​Interface​​F0/21​​is​​a​​trunk​​port. D.​​VLAN​​1​​was​​populated​​manually. Answer:​​A.​​Ports​​Fa0/15–18​​are​​not​​present​​in​​any​​VLANs.​​They​​are​​trunk​​ports. Question​​36.​​802.1q​​untagged​​frames​​are​​members​​of​​the​​_________​​VLAN. A.​​Auxiliary B.​​Voice C.​​Native D.​​Private Answer:​​C.​​Untagged​​frames​​are​​members​​of​​the​​native​​VLAN,​​which​​by​​default​​is​​VLAN​​1. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​37.​​Write​​the​​command​​that​​generated​​the​​following​​output.​​Write​​only​​the​​command and​​not​​the​​prompt: Name:​​Fa0/15 Switchport:​​Enabled Administrative​​Mode:​​dynamic​​desirable Operational​​Mode:​​trunk Administrative​​Trunking​​Encapsulation:​​negotiate Operational​​Trunking​​Encapsulation:​​isl Negotiation​​of​​Trunking:​​On Access​​Mode​​VLAN:​​1​​(default) Trunking​​Native​​Mode​​VLAN:​​1​​(default) Administrative​​Native​​VLAN​​tagging:​​enabled Voice​​VLAN:​​none [output​​cut] Answer:​​sh​​interfaces​​fastEthernet​​0/15​​switchport​​This​​show​​interfaces​​interface​​switchport command​​shows​​us​​the​​administrative​​mode​​of​​dynamic​​desirable​​and​​that​​the​​port​​is​​a​​trunk

  18. www.ConfigRouter.com port,​​DTP​​was​​used​​to​​negotiate​​the​​frame​​tagging​​method​​of​​ISL,​​and​​the​​native​​VLAN​​is​​the default​​of​​1. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​38.​​Which​​statement​​is​​true​​regarding​​virtual​​local​​area​​networks​​(VLANs)? A.​​VLANs​​are​​location​​dependent. B.​​VLANs​​are​​limited​​to​​a​​single​​switch. C.​​VLANs​​may​​be​​subnets​​of​​major​​networks. D.​​VLANs​​define​​collision​​domains. Answer:​​C.​​VLANs​​are​​not​​location​​dependent​​and​​can​​span​​to​​multiple​​switches​​using​​trunk links.​​Moreover,​​they​​can​​be​​subnets​​of​​major​​networks. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​39.​​In​​the​​diagram,​​what​​should​​be​​the​​default​​gateway​​address​​of​​Host​​B? ccna-faq-virtual-lans-16 A.​​192.168.10.1 B.​​192.168.1.65 C.​​192.168.1.129 D.​​192.168.1.2 Answer:​​B.​​The​​host’s​​default​​gateway​​should​​be​​set​​to​​the​​IP​​address​​of​​the​​subinterface​​that​​is associated​​with​​the​​VLAN​​of​​which​​the​​host​​is​​a​​member,​​in​​this​​case​​VLAN​​2. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​40.​​What​​is​​the​​purpose​​of​​frame​​tagging​​in​​virtual​​LAN​​(VLAN)​​configurations? A.​​Inter-VLAN​​routing B.​​Encryption​​of​​network​​packets C.​​Frame​​identification​​over​​trunk​​links D.​​Frame​​identification​​over​​access​​links Answer:​​C.​​Frame​​tagging​​is​​used​​when​​VLAN​​traffi​​travels​​over​​a​​trunk​​link.​​Trunk​​links​​carry frames​​for​​multiple​​VLANs.​​Therefore,​​frame​​tags​​are​​used​​for​​identifiation​​of​​frames​​from different​​VLANs. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​41.​​Write​​the​​command​​to​​create​​VLAN​​2​​on​​a​​layer​​2​​switch.​​Write​​only​​the​​command and​​not​​the​​prompt.

  19. www.ConfigRouter.com Answer:​​vlan​​2​​To​​confiure​​VLANs​​on​​a​​Cisco​​Catalyst​​switch,​​use​​the​​global​​confi​​vlan command. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Question​​42.​​Which​​statement​​is​​true​​regarding​​802.1q​​frame​​tagging? A.​​802.1q​​adds​​a​​26-byte​​trailer​​and​​4-byte​​header. B.​​802.1q​​uses​​a​​native​​VLAN. C.​​The​​original​​Ethernet​​frame​​is​​not​​modified. D.​​802.1q​​only​​works​​with​​Cisco​​switches. Answer:​​B.​​802.1q​​uses​​the​​native​​VLAN. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q43.​​Write​​the​​command​​that​​prevents​​an​​interface​​from​​generating​​DTP​​frames.​​Write​​only​​the command​​and​​not​​the​​prompt. Answer:​​switchport​​nonegotiate​​You​​can​​use​​this​​command​​only​​when​​the​​interface​​switchport mode​​is​​access​​or​​trunk.​​You​​must​​manually​​confiure​​the​​neighboring​​interface​​as​​a​​trunk interface​​to​​establish​​a​​trunk​​link. http://www.configrouter.com/ccna-faq-virtual-lans-7266/ Q44.​​In​​the​​configuration​​and​​diagram​​shown,​​what​​command​​is​​missing​​to​​enable​​interVLAN routing​​between​​VLAN​​2​​and​​VLAN​​3? ccna-faq-virtual-lans-10 A.​​encapsulation​​dot1q​​3​​under​​int​​f0/0.2 B.​​encapsulation​​dot1q​​2​​under​​int​​f0/0.2 C.​​no​​shutdown​​under​​int​​f0/0.2 D.​​no​​shutdown​​under​​int​​f0/0.3 Answer:​​B.​​The​​encapsulation​​command​​specifying​​the​​VLAN​​for​​the​​subinterface​​must​​be present​​under​​both​​subinterfaces. http://www.configrouter.com/ccna-faq-virtual-lans-7266/

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