642-811 (BCMSN®) TestKing's Building Cisco® Multilayer Switched Networks Version 6.0 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 2 - 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: 1. Go to www.testking.com 2. Click on Member zone/Log in 3. 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. 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 3 - Note: Section A contains 69 questions. Section B contains 180 questions. The total number of questions is 249. Each section starts with QUESTION NO :1. There are no missing questions. Section A QUESTION NO: 1 You are a technician at TestKing. Your newly appointed TestKing trainee wants you to describe the concept ‘NetFlow traffic flow’ to her. What would your reply be? A. It is a sequence of packets between a particular source and destination. B. It is a uni-directional sequence of packets between a particular source and destination. C. It is a bi-directional sequence of packets between a particular source and destination. D. It is a multi-directional sequence of packets between a particular source and destination. Answer: A Explanation: A NetFlow export-enabled device is one that has been configured to operate with Cisco IOS NetFlow Services software (see Appendix A) in a way that enables the device to export information about traffic flows between communicating end nodes in a network. For NetFlow data export, traffic flows in a network have the following attributes in common: • Source and destination autonomous system (AS) numbers • Source and destination IP addresses • Source and destination application port numbers • Input interfaces • IP type of services (ToS) • IP protocol Reference: http://www.cisco.com/en/US/products/sw/netmgtsw/ps1974/products_installation_guide_chapter09186a008008 0774.html 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 4 - QUESTION NO: 2 You are a technician at TestKing. You inform your newly appointed TestKing trainee that Cisco’s Architecture for Voice, Video and Integrated Data (AVVID) addresses a number of concerns when it comes to network deployment. Your trainee now wants to know what represents intelligent network services in Cisco’s AVVID? What would your reply be? (Choose all that apply.) A. Quality of Service (QoS) B. Intelligent platforms C. Mobility and scalability D. Security E. High availability Answer: A, C, D, E Explanation: By creating a robust foundation of basic connectivity and protocol implementation, Cisco AVVID Network Infrastructure addresses five primary concerns of network deployment: • High availability • Quality of service (QoS) • Security • Mobility and • Scalability Reference: http://www.cisco.com/en/US/netsol/netwarch/ns19/ns24/networking_solutions_audience_business_benefit0918 6a008009d678.html QUESTION NO: 3 You are a technician at TestKing. You inform your newly appointed TestKing trainee that some Cisco switches perform processing such as Access Control List (ACL) in hardware. Your trainee now wants to know what action will take place if the hardware reaches its maximum storage capacity of ACLs What would your reply be? (Choose all that apply.) A. Packets are dropped. B. Packet filtering will be accomplished. 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 5 - C. Performance is increased. D. Performance is decreased. Answer: B D Explanation: Determining if the ACL Configuration Fits in Hardware As previously stated, ACL processing in the Catalyst 3550 switch is mostly accomplished in hardware. However, if the hardware reaches its capacity to store ACL configurations, the switch software attempts to fit a simpler configuration into the hardware. This simpler configuration does not do all the filtering that has been configured, but instead sends some or all packets to the CPU to be filtered by software. In this way, all configured filtering will be accomplished, but performance is greatly decreased when the filtering is done in software. Reference: http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a008007 e701.html QUESTION NO: 4 Which of the following captures the speed of switching and scalability of routing? A. Layer 3 switching B. Fast switching C. Layer 2 routing D. Process routing Answer: A Explanation: Layer 3 switching is hardware-based routing. In particular, packet forwarding is handled by specialized hardware ASICs. A layer 3 switch does everything to a packet that a traditional router does. Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 18 QUESTION NO: 5 Drag and drop the type of flow mask used with Multiplayer Switching (MLS) in the options column to the statement that defines its character in the target column. 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 6 - Answer: Destination-IP - Used when no access list are configured Source- Destination –IP - Used when standard access list is configured IP-Flow - Used when extended access list is configured Explanation: Flow Mask • Destination-IP – This mode is used if no access list are configured on any of the MLS router interfaces. • Source- Destination –IP - This mode is used if there is a standard access list on any of the MLS interfaces. • IP-Flow - This mode is used if there is an extended access list on any MLS interfaces. Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 234-235 QUESTION NO: 6 Which of the following features of VLAN maps do not contain a match clause? A. Implicit deny feature at end of list. B. Implicit deny feature at start of list. C. Implicit forward feature at end of list D. Implicit forward feature at start of list. Answer: A 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 7 - Explanation: Each VLAN access map can consist of one or more map sequences, each sequence with a match clause and an action clause. The match clause specifies IP, IPX, or MAC ACLs for traffic filtering and the action clause specifies the action to be taken when a match occurs. When a flow matches a permit ACL entry the associated action is taken and the flow is not checked against the remaining sequences. When a flow matches a deny ACL entry, it will be checked against the next ACL in the same sequence or the next sequence. If a flow does not match any ACL entry and at least one ACL is configured for that packet type, the packet is denied. Reference: http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_guide_chapter09186a008007 f4d4.html QUESTION NO: 7 In which states is the Spanning Tree protocol (STP) affected by the forward delay parameter? (Choose all that apply.) A. Forwarding B. Listening C. Blocking D. Disabled E. Learning Answer: B, E Explanation: Listen – The switch listens for a period of time called the fwd delay (forward delay) Learn – The switch learns for a period of time called the fwd delay (forward delay) Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 139 QUESTION NO: 8 When using the CGMP protocol, CGMP-enabled switches and routers exchange a certain type of information. Which one of the following is exchanged? A. Summarized IGMP information. B. Multicast group to port assignments. 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 8 - C. Multicast join and leave events. D. CAM table changes. Answer: C Explanation: CGMP is based on a client/server model. The router is considered a CGMP server, with the switch taking on the client role. The basis of CGMP is that the IP multicast router sees all ICMP packets and therefore can inform the switch when specific hosts join or leave multicast groups. The switch then uses this information to construct a forwarding table. Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 306 QUESTION NO: 9 Which three network features are necessary for high availability? (Choose all that apply.) A. Spanning Tree Protocol (STP) B. Delay reduction C. Hot Standby Routing Protocol (HSRP) D. Dynamic routing protocols E. Quality of Service (QoS) F. Jitter management Answer: A C D Explanation: Because the importance of high availability networks is increasingly being recognized, many organizations are beginning to make reliability/availability features a key selection criteria for network infrastructure products. With this in mind, Cisco Systems engaged ZD Tag to observe and confirm the results of a series of tests demonstrating the high availability features of Cisco Catalyst Layer 2/Layer 3 switches. In order to maximize the relevance of the results, the demonstration was based on a model of a “real world” campus (in one of Cisco’s Enterprise Solution Center labs in San Jose, California). This switched internetwork consisted of wiring closet, wiring center, and backbone switches and conformed to Cisco’s modular three-tier (Access/Distribution/Core) design philosophy. The testing demonstrated the following high availability and resilience features of Catalyst switches: • per-VLAN Spanning Tree (PVST) using Cisco’s InterSwitch Link (ISL) and 802.1Q VLAN Trunking • Cisco Spanning Tree Enhancements, including UplinkFast and PortFast • Cisco Hot Standby Router Protocol (HSRP) and HSRP Track • Cisco IOS per-destination load balancing over equal cost OSPF paths 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 9 - • Cisco IOS fast convergence for OSPF Reference: http://www.cisco.com/warp/public/779/largeent/learn/technologies/campuslan.pdf QUESTION NO: 10 You are a technician at TestKing. Your newly appointed TestKing trainee wants to know why Dynamic Trunking Protocol (DTP) mode is ‘desirable’. What would your reply be? A. The interface is put into permanent trunking mode but prevented from generating DTP frames. B. The interface actively attempts to convert the link to a trunk link. C. The interface is put into a passive mode, waiting to convert the link to a trunk link. D. The interface is put into permanent trunking mode and negotiates to convert the link into a trunk link. Answer: B Explanation: Desirable – makes the port actively attempt to convert the link to a trunk link. Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 105 QUESTION NO: 11 You are the network administrator at TestKing. You want to enable VTP pruning on the entire TestKing management domain. What action should you take? A. Enable VTP pruning on any client switch in the management domain. B. Enable VTP pruning on any switch in the management domain. C. Enable VTP pruning on every switch in the management domain. D. Enable VTP pruning on a VTP server in the management domain. E. Disable VTP pruning on a VTP server in the management domain. Answer: D Explanation: 642 - 811 Leading the way in IT testing and certification tools, www.testking.com - 10 - Enabling VTP pruning on a VTP server allows pruning for the entire management domain. VTP pruning takes effect several seconds after you enable it. By default, VLANs 2 through 1000 are pruning-eligible. Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 117 QUESTION NO: 12 In which of the following states can HSRP routers on a LAN be in? (Choose all that apply.) A. Standby B. Idle C. Init D. Backup E. Established F. Active Answer: A, C, F Explanation: Using HSRP, a set of routers works in concert to present the illusion of a single virtual router to the hosts on the LAN. This set is known as an HSRP group or a standby group. A single router elected from the group is responsible for forwarding the packets that hosts send to the virtual router. This router is known as the Active router. Another router is elected as the Standby router. In the event that the Active router fails, the Standby assumes the packet-forwarding duties of the Active router. Although an arbitrary number of routers may run HSRP, only the Active router forwards the packets sent to the virtual router. Reference: http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a91.shtml QUESTION NO: 13 With regard to Layer 2 broadcast traffic, which of the following statements is valid? A. Layer 2 broadcast traffic is blocked by Layer 3 devices. B. A new packet is sent each time the client requests it. C. Each frame uses a special address for which only interested clients listen. D. It is the most efficient way to send data to a small group of clients. E. Each packet is refreshed when requested. Answer: A [...]... access Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 368 QUESTION NO: 18 Which one of the following describes hardware-based PDU header rewriting and forwarding based on specific information regarding one or more OSI layers? A B C D E Multiplayer switching Cisco express routing Multilayer switching Multilayer routing Router express forwarding Answer: C Explanation: Multilayer Switching...642 - 811 Explanation: LAN broadcasts do not cross routers (Layer 3 devices) Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 17 QUESTION NO: 14 You are the network administrator at TestKing The TestKing network contains a Cisco switch with a redundant power supply The two power supplies are of the same wattage How is the total power available... function of moving and rewriting packets Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 219 Leading the way in IT testing and certification tools, www.testking.com - 13 - 642 - 811 QUESTION NO: 19 According to the IEEE 802.1s standard, what is the purpose of MST? A B C D It is the spanning-tree implementation used by non -Cisco 892.1Q switches It runs a separate instance of... 2 information needed to switch the packet to the next hop This Layer 2 information is generally contained in the ARP cache table Cisco Express Forwarding creates a adjacency table to prepend the layer 2 information Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 412 QUESTION NO: 21 Which of the statements below is a characteristic of a Switch Port Analyzer (SPAN) session? A... Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 272 QUESTION NO: 34 Which one of the methods below, in Layer 3 switching, uses a forwarding information base (FIB)? A B C D Route caching Demand-based switching Flow-based switching Topology-based switching Answer: A Explanation: Leading the way in IT testing and certification tools, www.testking.com - 25 - 642 - 811 Cisco Express... called frame tagging • 802.10 – A Cisco Proprietary method of transporting VLAN information inside the standard 802.10 frame (Fiber Distributed Data Interface [FDDI]) Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 99 QUESTION NO: 23 With regard to Virtual Router Redundancy Protocol (VRRP), which of the following statements best describes VRRP? A A VRRP group has one active... addition, a 4byte tail is added to the frame to perform a cyclic redundancy check (CRC) This CRC is in addition to any frame checking that the Ethernet frame performs Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 99 QUESTION NO: 26 You are a technician at TestKing Your newly appointed TestKing trainee wants to know what the technology is called that manages multicast traffic... include the following: • Distance Vector Multicast Routing Protocol (DVMRP) • Multicast Open Shortest Path First (MOSPF) • Protocol-Independent Multicast Dense Mode (PIM DM) Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 313 QUESTION NO: 17 You are a technician at TestKing You inform your newly appointed TestKing trainee that all devices at all the layers in a hierarchical model... a Forward Information Base (FIB) The FIN is an entry-for-entry match of the routing table that has been reindexed via a binary search algorithm called a Patricia Tree Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 412 QUESTION NO: 35 You are the network administrator at TestKing You implement tail drops as a congestion avoidance mechanism on a router You want to avoid the... well-known virtual MAC address) – The fact that the MAC address is for an HSRP virtual router is indicated in the next two bytes of the address The HSRP code is always 07.ac Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 268 Leading the way in IT testing and certification tools, www.testking.com - 31 - 642 - 811 QUESTION NO: 43 What will happen to the frame when a VLAN port configured . table. Cisco Express Forwarding creates a adjacency table to prepend the layer 2 information. Reference: Building Cisco Multilayer Switched Networks (Ciscopress). extended access list on any MLS interfaces. Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 234-235 QUESTION NO: 6 Which of the