CCNA 3 Chapter 2 v5.0 Exam Answers 2015 (100%)

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1 CCNA 3 Chapter 2 v5.0 Exam Answers 2015 (100%) 1. Which tw netwrk design features require Spanning Tree Prtcl (STP) t ensure crrect netwrk peratin? (Chse tw.) static default rutes implementing VLANs t cntain bradcasts redundant links between Layer 2 switches link-state dynamic ruting that prvides redundant rutes remving single pints f failure with multiple Layer 2 switches 2. What is a characteristic f a Layer 2 lp? Bradcast frames are frwarded back t the sending switch. The Time-t-Live attribute f a frame is set t infinity. Ruters cntinually frward packets t ther ruters. A switch is cntinually frwarding the same unicast frame. 3. What is the utcme f a Layer 2 bradcast strm? Ruters will take ver the frwarding f frames as switches becme cngested. New traffic is discarded by the switch because it is unable t be prcessed. CSMA/CD will cause each hst t cntinue transmitting frames. ARP bradcast requests are returned t the transmitting hst. 4. What additinal infrmatin is cntained in the 12-bit extended system ID f a BPDU? MAC address VLAN ID IP address prt ID 5. Which three cmpnents are cmbined t frm a bridge ID? prt ID IP address extended system ID MAC address bridge pririty cst 6. Which STP pririty cnfiguratin wuld ensure that a switch wuld always be the rt switch? CCNA 5 Page 1

2 spanning-tree vlan 10 pririty 0 spanning-tree vlan 10 pririty spanning-tree vlan 10 rt primary spanning-tree vlan 10 pririty Which prtcl prvides up t 16 instances f RSTP, cmbines many VLANs with the same physical and lgical tplgy int a cmmn RSTP instance, and prvides supprt fr PrtFast, BPDU guard, BPDU filter, rt guard, and lp guard? STP Rapid PVST+ PVST+ MST 8. Which tw types f spanning tree prtcls can cause subptimal traffic flws because they assume nly ne spanning-tree instance fr the entire bridged netwrk? (Chse tw.) STP Rapid PVST+ PVST+ MSTP RSTP 9. What is an advantage f PVST+? PVST+ requires fewer CPU cycles fr all the switches in the netwrk. PVST+ reduces bandwidth cnsumptin cmpared t traditinal implementatins f STP that use CST. PVST+ ptimizes perfrmance n the netwrk thrugh autselectin f the rt bridge. PVST+ ptimizes perfrmance n the netwrk thrugh lad sharing. 10. In which tw prt states des a switch learn MAC addresses and prcess BPDUs in a PVST netwrk? (Chse tw.) blcking disabled frwarding learning listening CCNA 5 Page 2

3 11. If n bridge pririty is cnfigured in PVST, which criteria is cnsidered when electing the rt bridge? lwest IP address lwest MAC address highest IP address highest MAC address 12. Which RSTP prts are cnnected t end devices? trunk prts designated prts rt prts edge prts 13. A netwrk administratr is preparing the implementatin f Rapid PVST+ n a prductin netwrk. Hw are the Rapid PVST+ link types determined n the switch interfaces? Link types are determined autmatically. Link types must be cnfigured with specific prt cnfiguratin cmmands. Link types can nly be determined if PrtFast has been cnfigured. Link types can nly be cnfigured n access prts cnfigured with a single VLAN. 14. Which prt state will switch prts immediately transitin t when cnfigured fr PrtFast? listening learning frwarding blcking 15. T btain an verview f the spanning tree status f a switched netwrk, a netwrk engineer issues the shw spanning-tree cmmand n a switch. Which tw items f infrmatin will this cmmand display? (Chse tw.) The rt bridge BID. The rle f the prts in all VLANs. The status f native VLAN prts. The number f bradcasts received n each rt prt. The IP address f the management VLAN interface. 16. What is the purpse f HSRP? CCNA 5 Page 3

4 It prvides a cntinuus netwrk cnnectin when a ruter fails. It prevents a rgue switch frm becming the STP rt. It enables an access prt t immediately transitin t the frwarding state. It prevents malicius hsts frm cnnecting t trunk prts. 17. Which nnprprietary prtcl prvides ruter redundancy fr a grup f ruters which supprt IPv4 LANs? HSRP VRRPv2 GLBP SLB 18. Refer t the exhibit. Which prtcl infrmatin is being displayed in the utput? FHRP GLBP HSRP VRRP 19. Refer t the exhibit. A netwrk engineer is trubleshting hst cnnectivity n a LAN that uses a first hp redundancy prtcl. Which IPv4 gateway address shuld be cnfigured n the hst? CCNA 5 Page 4

5 Fill in the blank. D nt use abbreviatins. The spanning-tree mde rapid-pvst glbal cnfiguratin cmmand is used t enable Rapid PVST Fill in the blank. In FHRP peratin, tw r mre ruters are represented as a single virtual ruter. 22. Match the step number t the sequence f stages that ccur during the HSRP failver prcess. (Nt all ptins are used.) CCNA 5 Page 5

6 23. Open the PT Activity. Perfrm the tasks in the activity instructins and then answer the questin. Which switch is the rt bridge? Switch_1 Switch_2 Switch_3 Switch_4 CCNA 5 Page 6