Tài liệu TestKing''''s Composite Exam Version 3.0 pptx

642-891 (Composite®) TestKing's Composite Exam Version 3.0 642 - 891 Important Note Please Read Carefully Study Tips This product will provide you questions and answers along with detailed explanations carefully compiled and written by our experts Try to understand the concepts behind the questions instead of cramming the questions Go through the entire document at least twice so that you make sure that you are not missing anything Further Material For this test TestKing plans to provide: * Study Guide Concepts and labs * Interactive Test Engine Examinator Check out an Examinator Demo at http://www.testking.com/index.cfm?pageid=724 Latest Version We are constantly reviewing our products New material is added and old material is revised Free updates are available for 90 days after the purchase You should check your member zone at TestKing an update 3-4 days before the scheduled exam date Here is the procedure to get the latest version: Go to www.testking.com Click on Member zone/Log in The latest versions of all purchased products are downloadable from here Just click the links For most updates, it is enough just to print the new questions at the end of the new version, not the whole document Feedback Feedback on specific questions should be send to feedback@testking.com You should state: Exam number and version, question number, and login ID Our experts will answer your mail promptly Copyright Each pdf file contains a unique serial number associated with your particular name and contact information for security purposes So if we find out that a particular pdf file is being distributed by you, TestKing reserves the right to take legal action against you according to the International Copyright Laws Leading the way in IT testing and certification tools, www.testking.com -2- 642 - 891 Note: There are 301 BSCI questions There are 243 BCMSN questions The total number of questions is 544 Part 1, Building Scalable Cisco® Internetworks (BSCI®) BSCI note: Note: Section A contains 102 questions Section B contains 76 questions Section C contains 123 questions The total number of questions is 301 Each section starts with QUESTION NO :1 There are no missing questions BCSI Section A QUESTION NO: Which of the following AS numbers is an example of a private AS number? A B C D 10080 48512 64128 64524 Answer: D Explanation: This autonomous system designator is a 16-bit number, with a range of to 65535 RFC 1930 provides guidelines for the use of AS numbers A range of AS number, 64512 through 65535, is reserved for private use, much like the private Internet Protocol (IP) addresses Reference: Building Scalable Cisco Networks (Ciscopress) page 312 QUESTION NO: Leading the way in IT testing and certification tools, www.testking.com -3- 642 - 891 Which IOS features can be used to prevent routing loops between two autonomous systems caused by running different routing protocols and having redundant paths between systems? A B C D Route filtering Passive interfaces Static redistribution Two-way redistribution Answer: A, D Explanation: Two way redistribution If you must allow two-way redistribution, enable a mechanism to reduce the chances of routing loops Examples of mechanisms covered in this chapter are default routes, route filters, and modification of the metrics advertised With these types of mechanisms, you can reduce the chances of routes imported from one autonomous system being injected into the same autonomous system as new route information if more one boundary router is performing two-way redistribution Reference: Building Scalable Cisco Networks (Ciscopress) page 471 QUESTION NO: Which command would display OSPF parameters such as filters, default metric, maximum paths, and number of areas configured on a router? A B C D show show show show ip ip ip ip protocol route ospf interface ospf Answer: A Explanation: The show ip protocols command, displays parameters about timers, filters, metrics, network, and other information for the entire router Reference: Building Scalable Cisco Networks (Ciscopress) page 133 QUESTION NO: The following example is a configuration on a 256 kbps HDLC interface: interface serial 0/0 Leading the way in IT testing and certification tools, www.testking.com -4- 642 - 891 bandwidth 56 ip bandwidth-percent eigrp 200 Based on this example, how much bandwidth is allocated for EIGRP traffic? A B C D 56 kbps 112 kbps 128 kbps 256 kbps Answer: B Explanation: The bandwidth-percent command tells EIGRP what percentage of the configured bandwidth it may use The default is 50 percent Since the bandwidth command is also used to set the routing protocol metric, it may be set to a particular value for policy reasons The bandwidth-percent command can have values greater than 100 if the bandwidth is configured artificially low due to such policy reasons Reference: http://www.cisco.com/en/US/tech/tk365/tk207/technologies_tech_note09186a0080094063.shtml QUESTION NO: Cisco routers perform route summarization automatically for which three routing protocols? (Choose three) A B C D E IS-IS IGRP OSPF EIGRP RIP v.1 Answer: B, D, E Explanation: Sending route summaries – Routing information advertised out an interface is automatically summarized at major (classful) network address boundaries by RIP, IGRP, and EIGRP Specifically, this autonomous summarization occurs for those routes whose classful network address differs from the major network address of the interface to which the advertisement is being sent Reference: Building Scalable Cisco Networks (Ciscopress) page 79 Leading the way in IT testing and certification tools, www.testking.com -5- 642 - 891 QUESTION NO: A problem was reported that the 10.10.10.0/24 prefix was not injected into the local BGP table on RouterA The following information is available from RouterA: configuration: router bgp 65001 network 10.0.0.0 neighbor 172.16.1.1 remote-as 65002 no auto-summary routing table information: show ip route | include 10 O 10.10.0/24 [110/11] via 192.168.1.1, 2d00h, Ethernet0/0 Why is this prefix not in the local BGP table? A B C D This route is not a BGP learned route The network command is wrong The 172.16.1.1 neighbor is down The prefix 10.10.10.0/24 is not a connected route Answer: A Explanation: The show ip route command will not display the BGP table You must use the show ip bgp command to display the entries in the BGP routing table Reference: Building Scalable Cisco Networks (Ciscopress) page 348 QUESTION NO: Which command displays RIP routing transactions? A B C D E show ip rip database show ip route show ip protocols rip debug ip rip debug ip routing Answer: D Leading the way in IT testing and certification tools, www.testking.com -6- 642 - 891 Explanation: debug ip rip Use the debug ip rip EXEC command to display information on RIP routing transactions The no form of this command disables debugging output Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_command_reference_chapter09186a00800 7ff66.html QUESTION NO: Exhibit: Leading the way in IT testing and certification tools, www.testking.com -7- 642 - 891 What is the OSPF router ID for TestKing2 assuming the router-id command is not used? A B C D 10.5.0.2 10.7.0.3 10.9.0.1 10.10.10.10 Answer: D Explanation: The highest ip address on an active interface is normally used as the OSPF router ID This can be overridden by configuring an IP address on a loopback address on a loopback interface Reference: Building Scalable Cisco Networks (Ciscopress) page 126 QUESTION NO: In which two types of OSPF networks does a Designated Router (DR) election take place? (Choose two) A B C D Point-to-point Nonbroadcast multi-access Point-to-multipoint Broadcast multi-access Answer: B, D Explanation: Mode Adjency NBMA Manual Configuration DR/BDR elected Broadcast Automatic DR/BDR elected Reference: Building Scalable Cisco Networks (Ciscopress) page 124 QUESTION NO: 10 What are the three general address types of IPv6? (Choose three) A B C D Private Unicast Broadcast Public Leading the way in IT testing and certification tools, www.testking.com -8- 642 - 891 E Multicast F Anycast Answer: B, E, F • • • IPv6 Address Type: Unicast - An IPv6 unicast address is an identifier for a single interface, on a single node A packet that is sent to a unicast address is delivered to the interface identified by that address IPv6 Address Type: Anycast - An anycast address is an address that is assigned to a set of interfaces that typically belong to different nodes A packet sent to an anycast address is delivered to the closest interface—as defined by the routing protocols in use—identified by the anycast address IPv6 Address Type: Multicast - An IPv6 multicast address is an IPv6 address that has a prefix of FF00::/8 (1111 1111) An IPv6 multicast address is an identifier for a set of interfaces that typically belong to different nodes Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide_chapter09186a0080110dd2 html#99899 QUESTION NO: 11 What strategy can a network administrator use to minimize the effect of routing table updates on internal routers when a WAN interface frequently changes its state from up to down? A B C D E Use a distance vector routing protocol Use private IP addresses Use dial-on-demand routing Use route summarization Use a routing protocol that tolerates route flapping Answer: D Explanation: Another advantage to using route summarization in a large complex network is that it can isolate topology changes from other routers That is, if a specific link in the domain were flapping (going down and up rapidly), the summary route would not change, so no router external to the domain would need to keep modifying its routing table due to this flapping activity Reference: Building Scalable Cisco Networks (Ciscopress) page 76 QUESTION NO: 12 Leading the way in IT testing and certification tools, www.testking.com -9- 642 - 891 What happens if a BGP route reflector receives updates from a peer in another autonomous system? A B C D E It discards the update It sends the update to all IBGP peers It sends the update only to nonclients It sends the update only to route reflector clients It sends the update to all routers in the autonomous system Answer: B Explanation: Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_configuration_guide_chapter09186a00800 ca571.html#5155 QUESTION NO: 13 Exhibit: Leading the way in IT testing and certification tools, www.testking.com - 10 - 642 - 891 C RG-58 coax D 50 micron MMF E 62.5 micron SMF Answer: B, D Explanation: B: 1000BaseT use category UTP D: 1000BaseSX use 62.5 and 50-micron MMF QUESTION NO: 147 You are configuring a Catalyst 5000 switch You want to set the trunking encapsulation mode for a port Which command should you use? A B C D Set Set Set Set trunk Vtp mode port mode encapsulation Answer: A Explanation: The set trunk command configures trunking on a port Incorrect Answers B: The set vtp mode command sets the VTP mode of the switch C, D: There are no such commands QUESTION NO: 148 A junior TestKing trainee asks you what a VLAN is What should you tell him? A B A C A VLAN is a routed internetwork A VLAN is a single broadcast domain A VLAN is a group of switch ports that communicate through RSM A VLAN is a group of switch ports that are members of the same multicast group Answer: B Explanation: A VLAN implements a single broadcast domain Incorrect Answers Leading the way in IT testing and certification tools, www.testking.com - 333 - 642 - 891 A: VLAN operate at layer 2, not at layer C: A Route Switch Module (RSM) is used for communication between VLANs D: Multicast and VLANs are not connected concepts QUESTION NO: 149 You have just told your trainee that a Catalyst 8500 switch supports layer switching He is not convinced since he knows that switches work at Layer of the OSI model He asks you how the switch can accomplish this What should you tell him? A B C D MLS is used CEF is used NFFC is used MSFC is used Answer: B Explanation: Cisco Express Forwarding (CEF) provides Layer switching based on a topology map of the entire network CEF been developed for the Cisco 12000 Gigabit Switch Router (GSR), the Catalyst 8500, and the Cisco 7500 QUESTION NO: 150 How does the IGMPv1 protocol determine which client on a subnet should respond to a host membership query? A B C D The clients use a countdown timer If the query is broadcast , then all clients respond The client with the lowest MAC address responds The client uses a designated querier election process Answer: D Explanation: For IGMP Version 1, the designated router is elected according to the multicast routing protocol that runs on the LAN Note: For IGMP Version 2, the designated querier is the lowest IP-addressed multicast router on the subnet QUESTION NO: 151 Leading the way in IT testing and certification tools, www.testking.com - 334 - 642 - 891 You want to purchase switches that support redundant supervisor engines Which models should you consider? (Choose two) A Catalyst 4000 B Catalyst 5500 C Catalyst 6000 D Catalyst 12000 Answer: B, C Explanation: B: The Catalyst 5500 series switches support an optional redundant supervisor engine C: Catalyst 6000 family switches support fault resistance by allowing a redundant supervisor engine to take over if the primary supervisor engine fails QUESTION NO: 152 Your TestKing trainee knows that each switch has a unique 8-byte Bridge ID value She asks you how this value is determined What should you tell her? A Bridge Priority and MAC address B Bridge priority and root Path Cost C Management IP address and MAC address D Management IP address and Root Path Cost Answer: A Explanation: The bridge ID is a combination of the bridge priority and base MAC address QUESTION NO: 153 You want to configure your switch with the UplinkFast feature What should you take into consideration? (Select two.) A B C D It must be used with the PortFast feature enabled When enabled, it is enabled for the entire switch and all VLANs It should be configured on all switches, including the root bridge When the primary Root Port uplink fails, another blocked uplink can be immediately brought up for use Answer: B, D Leading the way in IT testing and certification tools, www.testking.com - 335 - 642 - 891 Explanation: B: All VLANs on the switch are affected and you cannot configure UplinkFast on individual VLANs D: When a link fault occurs on the primary root link, UplinkFast transitions the blocked port to a forwarding state UplinkFast changes the port without passing through the listening and learning phases, QUESTION NO: 154 You want to configure your switch with the PortFast feature What should you take into consideration? (Select two.) A B C D It increases the forward delay time interval to 30 seconds It should be enabled on ports connecting to hubs and routers It should not be enabled on ports with redundant links to another switch It enables fast connectivity to be established on the access layer port to a booting workstation Answer: C, D Explanation: C: Portfast on redundant links could cause network loops D: PortFast is used to make a point-to-point port almost immediately enter into forwarding state by decreasing the time of the listening and learning states Incorrect Answers A: PortFast decreased the forward delay time B: Ideally PortFast should only be used on point-to-point links connected only to workstations or servers QUESTION NO: 155 Your trainee asks you which MAC address corresponds to the multicast IP address of 224.0.1.55 What should you tell her? A B C D 00-00-00-00-01-55 00-01-E0-00-01-37 E0-00-01-37-FF-FF 01-00-5E-00-01-37 Answer: D Leading the way in IT testing and certification tools, www.testking.com - 336 - 642 - 891 QUESTION NO: 156 You are required to purchase 10 switches They must all support the VLAN Management Policy Server (VMPS) feature Which switches would come into consideration? (Choose three) A B C D 2900XL series 3500XL series 5000 series 8500 series Answer: A, B, C Explanation: A, B: Catalyst 2900 and 3500 Series XL Features include VMPS C: VMPS is present on all Catalyst 5000 Family switches Note: The VLAN Management Policy Server (VMPS) service is used to set up a database of MAC addresses that can be used for dynamic addressing of VLANs VMPS is a MAC-address-to-VLAN mapping database QUESTION NO: 157 What happens, by default, when a layer switch receives multicast on one of its ports? A B C D It blocks multicast traffic on all ports It delivers multicast traffic to all ports It delivers Multicast traffic only to ports that subscribe to it It delivers multicast traffic only to clients that are a member of a multicast group Answer: C Explanation: Multicasts send the frame to only certain networks or subnets and all hosts within that network or subnet QUESTION NO: 158 You are configuring MLS (multilayer switching) on your Cisco switch What action could disable MLS? A B C D enabling ip security clearing the mls cache configuring an output access list disabling TCP header compression Leading the way in IT testing and certification tools, www.testking.com - 337 - 642 - 891 Answer: A Explanation: There are several configuration options on the router which are not compatible with MLS These include IP accounting, encryption, compression, IP security, Network Address Translation (NAT), and Committed Access Rate (CAR) Reference: Troubleshooting IP MultiLayer Switching http://www.cisco.com/warp/public/473/13.html QUESTION NO: 159 Your TestKing trainee Bob is curios about the Multilayer Swithcing (MLS) cache What should you tell him? A B C D MLS cache entries support unidirectional flows The MLS-RP stores routing information in the MLS cache The MLS-SE deletes a cache entry when it detects a TCP FIN ACK The MLS-RP creates MLS cache entries based on known data flows Answer: A Explanation: An MLS cache entry is created for the initial packet of each flow Incorrect Answers B: Routing information is not stored in the MLS cache C: The state and identity of the flow are maintained while packet traffic is active; when traffic for a flow ceases, the entry ages out D: The MLS-SE, not the MLS-RP creates MLS cache entries QUESTION NO: 160 You want to remove one particular VLAN from an existing trunk link Which IOS command should you use? A B C D set vlan clear vtp clear port clear trunk Answer: A Explanation: The clear vlan command clears a VLAN Leading the way in IT testing and certification tools, www.testking.com - 338 - 642 - 891 B: The clear vtp command clears VTP statistics C: The clear port command clears port broadcast suppression D: The clear trunk command clears trunk ports All VLANs would be cleared QUESTION NO: 161 You are defining a MLS management interface on the MLS-RP Your Trainee asks you want the purpose of the MLS management interface is What should you tell her? A It is used to manage the MLS cache B It is used to send and receive MLSP packets C It is used to make routing decisions for the MLS-SE D It is used to define the primary route processor in the VTP domain Answer: B Explanation: MLSP packets are sent and received on the management interface These packets include information on about hardware-switched flows QUESTION NO: 162 You want multilayer switching to cooperate with input access lists Which IOS command should you use to accomplish this goal? A B C D ip mls input-acl mls rp ip input-acl set input-acl enable set mls input-acl enable Answer: B Explanation: By using the mls rp ip input-acl command in addition to normal MLS-RP configuration commands on a router interface, an inbound flowmask is supported Incorrect Answers A, C, D: No such commands QUESTION NO: 163 Leading the way in IT testing and certification tools, www.testking.com - 339 - 642 - 891 You are required to assign a VLAN ID to a route processor interface Which command should you use? A B C D mls set mls set vlan vlan-id-number mls vlan vlan-id-number rp vlan-id vlan-id-number mls vtp-domain vlan-id-number Answer: C Explanation: The mls rp vlan-id [vlan-id-number] command assigns the interface the proper VLAN number Incorrect Answers A, D: Can’t these commands in this way B: There is no set mls vlan command QUESTION NO: 164 You are setting up a large flat network for TestKing inc In particular you are configuring a Cisco 5000 Catalyst switch However, there are too much broadcasts on the network and the network traffic is too high You decide to create VLANs to reduce the broadcasts Which hardware will enable you to configure inter-VLAN communication in this scenario? A B C D MLS RSM MSFC VLAN bandwidth Answer: B Explanation: You can view a Route Switch Module (RSM) as an external router that has several interfaces directly connected into the different VLANs of a Catalyst 5000 switch Reference: Troubleshooting InterVLAN Routing on a Catalyst 5000 Switch with RSM http://www.cisco.com/warp/public/473/56.html Incorrect Answers A: Multilayer Switching (MLS) C: Multilayer Switch Feature Card (MSFC) is a Route Processor (RP) D: Does not apply Leading the way in IT testing and certification tools, www.testking.com - 340 - 642 - 891 QUESTION NO: 165 Exhibit: show port 3/1 You use the command shown in the exhibit The output includes a Giant column which has a value that is greater than You know that the normal value is What could have caused this non-zero value? A B C D IEEE 802.1Q IEEE 802.10 misconfigured NIC User configuration Answer: A Explanation: The EtherType field identifying the 802.1q frame is inserted into a 802.3 Ethernet frame Inserting a tag into a frame that already has the maximum Ethernet size creates a 1522 byte frame that can be considered as a "baby giant" by the receiving equipment This would cause the output of the show port command to include a non-zero Giants value Note: The show port command is used to display port status and counters Giants denote the number of received giant frames (frames that exceed the maximum IEEE 802.3 frame size) on the port Reference: Trunking Between Catalyst 4000, 5000, and 6000 Family Switches Using 802.1q Encapsulation http://www.cisco.com/warp/public/473/27.html QUESTION NO: 166 Bob, your TestKing trainee, wants to set up some VLANs He uses a MAC addresses database to assign VLAN membership Which type of VLAN has Bob configured? A B C D E Static VLANs Dynamic VLANs Automatic VLANs Host-based VLANs Source-based VLANs Answer: B Leading the way in IT testing and certification tools, www.testking.com - 341 - 642 - 891 Explanation: Cisco administrators can use the VLAN Management Policy Server (VMPS) service to set up a database of MAC addresses that can be used for dynamic addressing of VLANs Incorrect Answers A: In a static VLAN, the administrator assigns switch ports to the VLAN, and the association does not change until the administrator changes the port assignment C, D, E: No such things QUESTION NO: 167 Which statement is true about the characteristic of static VLAN members? A B C D VLAN membership is managed manually by the network administrator The switch can forward their packets to other VLANs using the VTP protocol VLAN membership is managed through a database that maps MAC addresses to specific VLANs The ports can be automatically changed to another VLAN, based on a device MAC address in a VLAN database Answer: A Explanation: Static port VLAN membership on the switch is assigned manually by the administrator on a portby-port basis Reference: Understanding and Configuring VLAN Trunk Protocol (VTP) http://www.cisco.com/warp/public/473/21.html Incorrect Answers B: Virtual Local Area Network (VLAN) Trunk Protocol (VTP) reduces administration in a switched network When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain However, VTP is not used for static VLAN members C, D: The VLAN database implements dynamic addressing of VLANs QUESTION NO: 168 You have configured an Etherchannel bundle on your Cisco 5000 Catalyst How fast will traffic be rerouted, to a new link, if one of the links in the bundle fails? A one minute B a few seconds C a few milliseconds Leading the way in IT testing and certification tools, www.testking.com - 342 - 642 - 891 D not until appropriate commands are entered Answer: C Explanation: If a link is lost in a EtherChannel network, traffic is rerouted to one of the other links in just a few milliseconds, QUESTION NO: 169 consoleTK (enable) show vtp domain Domain Name Domain Index - Vlan-count -5 Max-vlan-storage 1023 Last Updater -0.0.0.0 V2 Mode disabled Vtp Version Config Revision pruning -disabled Local Mode server Password Notifications -disabled PruneEligible on Vlans 2-1000 ConsoleTK (enable) You plan configure VLANs on your Catalyst 6000 switch You issue the command shown in the exhibit above You want to be able to create new VLANs and to be able to modify and delete existing VLANs What you need to do, if anything, on this switch before you are able to work with your VLANs as you have planned? A B C D You enable VTP You configure a VTP domain name You change the VTP mode to transparent You nothing, the switch is already a VTP server Answer: B Explanation: The VTP domain name is not configured Incorrect Answers A: VTP is already enablde The Vlan-count is C: Server mode is already configured Server mode is the appropriate mode in this scenario D: We should configure the domain name Leading the way in IT testing and certification tools, www.testking.com - 343 - 642 - 891 QUESTION NO: 170 What is valid about the catalyst software functions provided by the embedded RMON Agent and the switchProbe? A B C D E SPAN is an option of the Switch Probe function The function use of all RMON groups as well as RMON2 the function of switchProbe offers an in-band link to the network manager RMON offers the ability to remotely monitor, telnet and manage network device Statistics ,events, history and alarms are supported by the IETF document defining RMON (RFC 1757) Answer: E Explanation: Embedded ROM supports statistics, history, alarms and events as specified in RFC 1757, Reference: RFC 1757, Remote Network Monitoring Management Information Base QUESTION NO: 171 Your TestKing trainee Robert is configuring an etherchannel bundle on a new catalyst 2900XL switch Which command should Robert use to enable the bundle? A port group B set group channel on C set port channel D set bundle on Answer: A Explanation:.The port group command is used to enable an etherchannel bundle on a Catalyst 2900XL switch Incorrect Answers B, D: These command does not exists C: The set port channel command is not used on a Catalyst 2900XL switch It used on other switches, such as Cisco 5000 series however QUESTION NO: 172 Leading the way in IT testing and certification tools, www.testking.com - 344 - 642 - 891 You tell your TestKing Trainee Tess that there is Cisco switching technology that controls multicast traffic so that it is delivered only to the switch ports that have multicast client What technology are you talking about? A B C D PIM VTP IGMP CGMP Answer: A Explanation: PIM (Protocol-Independent Multicast) handles the transmission of multicast packets to all hosts in the multicast group while preventing loops and wasted bandwidth Incorrect Answers B: VTP is VLAN Trunking Protocol It shares VLAN information between switches It is not used for multicast C: Routers use the Internet Group Management Protocol (IGMP) to learn whether members of a group are present on directly attached subnets, and whether or not to forward multicast packets onto those networks Hosts join multicast groups by sending IGMP report messages D: Cisco Group Management Protocol (CGMP) is a Cisco Proprietary protocol whichenables IP multicasting at layer on Cisco's Catalyst switches that not distinguish between IP multicast data packets and IGMP Report messages, which are both MAC level addressed to the same group address CGMP performs same tasks as IGMP, and was designed to work with other layer multicast protocols QUESTION NO: 173 Bob asks what can be said about the Span Tree PortFast feature What should you tell him? (Select three) A B C D E Increase throughput for the port It is configured on per port basis It is Cisco Specified Implementation It improve Span tree Convergence Time It can be used to stop a switch from sending on BPDUs that waste bandwidth Answer: B, C, D Explanation: B: Portfast is configured on per port basis C: PortFast is a Cisco propriety implementation D: PortFast increase Span tree Convergence Time Leading the way in IT testing and certification tools, www.testking.com - 345 - 642 - 891 Note: When enabling Portfast on a Catalyst switch, the Spanning Tree Protocol is essentially bypassed and the port goes into forwarding mode immediately When connecting a device to a port, this port will go through the STP phases of listening, learning and forwarding Portfast can only be used with end-stations such as PC, workstations, etc Connecting a hub or other switch can cause loops, since the Spanning Tree algorithm is not enabled on this port Reference: Using Portfast and Other Commands to Fix Workstation Startup Connectivity Delays, http://www.cisco.com/warp/public/473/12.html Incorrect Answers A: Throughput is not affected E: It cannot be used to stop a switch from sending BPDUs QUESTION NO: 174 Cisco uses the concepts of Core Layer, Distribution Layer and Access Layer What can be said about distribution layer switches? (Select two) A B C D low cost interVLAN routing robust Layer throughput high port density to connect to end users Answer: B, C Explanation: Distribution Layer Switches Switches used in the distribution layer should offer these features: • Aggregation of access layer devices • High Layer throughput—InterVLAN routing • Robust Layer functionality • Security • Media translation Incorrect Answers Note: Access layer devices have the following characteristics : • High port density to connect to end users • Low cost • Uplinks to higher layers of the campus network • Layer services (traffic filtering and VLAN membership) A: Distribution layer switch not have low costs Leading the way in IT testing and certification tools, www.testking.com - 346 - 642 - 891 D: Access layer switches have high port density to connect to end users BCMSN note: Section A contains 69 questions Section B contains 174 questions The total number of questions is 243 Each section starts with QUESTION NO :1 There are no missing questions Note: There are 301 BSCI questions There are 243 BCMSN questions The total number of questions is 544 Leading the way in IT testing and certification tools, www.testking.com - 347 - ... Guide Concepts and labs * Interactive Test Engine Examinator Check out an Examinator Demo at http://www.testking.com/index.cfm?pageid=724 Latest Version We are constantly reviewing our products... update 3-4 days before the scheduled exam date Here is the procedure to get the latest version: Go to www.testking.com Click on Member zone/Log in The latest versions of all purchased products... at the end of the new version, not the whole document Feedback Feedback on specific questions should be send to feedback@testking.com You should state: Exam number and version, question number,