CISCO STUDY GUIDE. Building Cisco Multilayer Switched Networks (BCMSN) Edition 2

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1 CISCO STUDY GUIDE Building Cisco Multilayer Switched Networks (BCMSN) Edition 2

2 Congratulations!! You have purchased a Testkiller, Ltd Study Guide. This study guide is a selection of keypoints you will need to know to pass the official CCNP Switching exam. Study and memorize the following concepts, keypoints and problems for approximately 15 to 20 hours and you will be prepared to take the exams. We guarantee it! Remember, average study time is 15 to 20 hours and then you are ready!!! GOOD LUCK! DISCLAIMER This study guide and/or material is not sponsored by, endorsed by or affiliated with Cisco Systems, Inc. Cisco, Cisco Systems, CCDA, CCNA, CCDP, CCNP, CCIE, CCSI, the Cisco Systems logo and the CCIE logo are trademarks or registered trademarks of Cisco Systems, Inc. in the United States and certain other countries. All other trademarks are trademarks of their respective owners. Guarantee If you use this study guide correctly and still fail the exam, send your official score notice and mailing address to: Testkiller, Ltd 8200 Pat Booker Rd. #368 San Antonio, TX We will gladly refund the cost of this study guide. However, you will not need this guarantee if you follow the above instructions. This material is protected by copyright law and international treaties. Unauthorized reproduction or distribution of this material, or any portion thereof, may result in severe civil and criminal penalties, and will be prosecuted to the maximum extent possible under law. Copyright 2001 Testkiller, Ltd. All Rights Reserved.

3 Table of Contents Overview of a Campus Network... 1 A Solution to Broadcast Domain Issues: Localize Traffic... 1 Current Campus Networks... 1 The 80/20 Rule... 1 The New 20/80 Rule... 1 The Emerging Campus Network... 2 Emerging Campus Structure... 2 The Hierarchical Model... 2 The Access Layer... 2 The Distribution Layer... 3 The Core Layer... 3 The Building Block Approach... 3 Connecting the Switch Block... 3 Cable Media Types... 3 Ethernet... 4 Fast Ethernet...4 Cabling Switch Block Devices... 4 Configuring Connectivity within the Switch Block... 4 Defining Common Workgroups with LANs... 4 Layer2 Campus Network... 4 VLANs... 5 Defining VLAN Boundaries... 5 Link Types... 5 VLAN Frame Identification Methods... 5 Configuring a Trunk Link... 6 VTP Modes of Operation... 6 Managing Redundant Links... 7 Contents of BPDU... 7 Spanning-Tree Port States... 7 Inter-VLAN Routing... 7 Improving IP Routing Performance with Multilayer Switching... 8 MLS Components... 8 Creating a NULL Domain... 8 Configuring HSRP for Fault Tolerance Routing... 8 Routing Issues in a Redundant Environment... 8 HSRP Group Members... 9 HSRP States... 9 Multicast Overview... 9 Controlling Access to the Campus Network... 9 Applying Policies in a Hierarchical Model... 9 Managing Network Devices Port Security... 10

4 Key Concepts Building Cisco Multilayer Switched Networks Overview of a Campus Network A campus is a building or group of buildings connected into one enterprise network that consists of many LANs. A campus is further defined as a company or a portion of a company contained in a fixed geographic area. The major problem with traditional networks is availability and performance. These two problems are impacted by the amount of bandwidth in the network. A Solution to Broadcast Domain Issues: Localize Traffic There are two main options for addressing the broadcast containment issue for large switched LAN sites. The first option is to use routers to create many subnets, logically segmenting the traffic. LAN broadcasts do not pass through routers. The second option is to implement virtual LANs (VLANs) within the switched network. Current Campus Networks Most campus networks now consists of two components: 1. LAN switches 2. Routers The 80/20 Rule Ideally the end users with common interests or work patterns are placed in the same logical network as the servers they access most often. The 80/20 rule states that in a properly designed network environment 80% of the traffic on a given network segment is local. Not more than 20% of the network traffic should move across the backbone. Backbone congestion indicates that the traffic patterns are not meeting the 80/20 rule. The New 20/80 Rule Traffic patterns are moving toward what is now referred to as the 20/80 model. In the 20/80 model only 20% of traffic is local to the workgroup LAN and 80% of the traffic is required to go off the local network. 1

5 The Emerging Campus Network The key requirements placing pressure on the emerging campus designs are as follows: Fast convergence Deterministic paths Deterministic failover Scalable size and throughput Centralized applications The new 20/80 Rule Multiprotocol support Multicasting Emerging Campus Structure Services can be separated into three separate categories: 1. Local services 2. Remote services 3. Enterprise services The Hierarchical Model The layers within the hierarchical model are defined as follows: 1. Access layer 2. Distribution layer 3. Core layer The Access Layer Some of the functions represented by Access layer are Shared bandwidth, Switched bandwidth, and Layer 2 services. 2

6 The Distribution Layer The multitude functions of the Distribution layer are as follows: VLAN aggregation Department of workgroup access Broadcast or multicast domain functions Inter-VLAN routing Media translation Security The Core Layer The core layer is responsible for providing connectivity between switched blocks, providing access to other blocks, such as the WAN block, and switching frames or packets as quickly as possible. The Building Block Approach The two major elements for a campus network are Switch block and Core block. These include three contributing variables: Server block WAN block Mainframe block Connecting the Switch Block Campus networks carry a variety of traffic types. As more applications and users are configured into the campus network, the need for available bandwidth increases. Cable Media Types A variety of cable media types have been deployed for local-area networks, including Ethernet, Token Ring and FDDI. In order to increase the overall performance to the us- 3

7 ers, you must either increase the overall bandwidth of the network, or decrease the number of devices on the same shared media cable segment. Ethernet One solution to the bandwidth crunch is Ethernet Switching, which dynamically allocates dedicated 10 Mbps connections to each user on the network. Fast Ethernet For campuses with existing Ethernet installations, increasing the network speed from 10 Mbps to 100 Mbps is preferable to investing in a completely new LAN technology. Cabling Switch Block Devices There are two basic types of cable connections: 1. through the console port 2. through the Ethernet port Configuring Connectivity within the Switch Block After the switches have been physically cabled, some basic system settings that should be assigned are: Limiting access to the switch Setting the host or prompt name to the switch Defining the switch s IP address and subnet mask Identifying a port or an interface with a unique description Setting the port speed Defining the full duplex port Verifying connectivity Defining Common Workgroups with LANs Layer2 Campus Network 4

8 With Layer2 campus networks you encounter problems of flat network structures, security management, and managing multiple paths to a destination. VLANs VLANs solve many of the issues of the Layer2 Network by allowing efficient bandwidth utilization, security management, load-balancing multiple paths, and the isolation of problem components. Defining VLAN Boundaries The number of VLANs in the switch block will vary widely depending on several factors. These factors include traffic patterns, types of applications, network management needs and group commonality. When scaling VLANs in the switch block, there are two basic methods of defining the VLAN boundaries: 1. End-to-end VLANs 2. Local VLANs Link Types There are three basic VLAN link types: 1. Access Links 2. Trunk Links 3. Hybrid Links VLAN Frame Identification Methods There are four basic Frame ID methods: 1. Inter-switch link (ISL) 2. IEEE 802.1Q 3. LAN Emulation (LANE)

9 Fields in an ISL encapsulation: Destination Address (DA) Frame Type (TYPE) User-defined Bits (USER) Source address (SA) Length (LEN) SNAP/LLC High bits of the source address (HSA) VLAN ID BPDU/CDP indicator Index (INDX) Reserved for FDDI and Token Ring Encapsulated Frame Frame Check Sequence Configuring a Trunk Link Fast Ethernet and Gigabit Ethernet trunking can be set up in any of the following modes: On Off Desirable Auto Nonegotiate VTP Modes of Operation There are three VTP modes of operation: 1. Server 6

10 2. Client 3. Transparent Managing Redundant Links The basic functionality of a switch is identical to that of a transparent bridge. By definition a bridge must not modify the frames that it forwards. A bridge learns addresses by listening on a port for a device s source MAC address. The bridge then forwards the broadcast it receives out all ports except for the port that initially received the broadcast. If a destination MAC address is unknown, sometimes called an unknown unicast, the bridge forwards the frame out all ports except for the port that initially received the frame. When a bridge receives a frame, it either filters it if the frame s destination is out the receiving port, or forwards the frame if the destination is on a different port. Contents of BPDU The BPDU contains the following information: Root information Path cost Bridge information Port information Timers Spanning-Tree Port States There are five types of Spanning Tree Port states: 1. Blocked 2. Listen 3. Learn 4. Forward 5. Disabled Inter-VLAN Routing 7

11 In Isolated Broadcast Domains you need to consider sharing resources between VLANs, load-balancing, redundant Links, addressing, and segmenting networks with VLANs. Improving IP Routing Performance with Multilayer Switching MLS Components Multilayer switching includes the following three components: 1. Multilayer Switching Switch Engine (MLS-SE) 2. Multilayer Switching Route Processor (MLS-RP) 3. Multilayer Switching Protocol (MLSP) Creating a NULL Domain There are several ways in which a route processor and a switch can end up in different VTP domains. You can purposely place both devices in separate domains, you can misname or mistype the VTP domain when configuring either the switch or the route processor, or you can enter the MLS interface command prior to putting the interface in a VTP domain. Configuring HSRP for Fault Tolerance Routing The Hot Standby Routing Protocol provides fault tolerance and enhanced routing performance for IP networks. HSRP allows Cisco IOS routers to monitor each other s operational status and very quickly assume packet forwarding responsibility in the event that the current forwarding device in the HSRP group fails or is taken down for maintenance. Routing Issues in a Redundant Environment Hosts learn which router they should use by the following methods: Default gateway Proxy ARP Routing protocol 8

12 HSRP Group Members The stand by group is comprised in the following entities: One active router One stand by router One virtual router Other routers HSRP States The HSRP states include: Initial state Learn state Listen state Speak state Standby state Active state Multicast Overview Multimedia traffic can work its way through the network using one of the following methods: Unicast Broadcast Multicast Controlling Access to the Campus Network Access control cannot be implemented until a standard access policy has been created. Applying Policies in a Hierarchical Model 9

13 Policies can be applied at any of the three basic layers: 1. Access layer 2. Distribution layer 3. Core layer Managing Network Devices When managing network devices you must take into account the following factors: physical security, passwords, privilege levels to allow limited access to a network device, and limiting virtual terminal or telnet access. Port Security A MAC address can be allowed by either static or dynamic assignment of the MAC address. 10

14 WARNING: It is important that you read and study the CCNP Keypoints portion of this study guide. We have identified important concepts in this section that are required knowledge to pass the exam. Please ensure that you absolutely know and understand these keypoints prior to sitting for the exam. 11

15 Building Cisco Multilayer Switched Networks Keypoints 1. Know that the Switch(config) ip default-gateway <ip address> command accurately depicts the mode and command used to configure a default gateway on an IOS command-based switch. 2. Know that 256 is the maximum number of VLANs that can be supported on a single RSM. 3. Know that static VLAN membership is managed through port-based assignments. 4. Know that a Route Processor is used to connect several separate VLANs. 5. Know that there is not an issue with VLAN membership, nor is it media dependent in order to connect a host that is attached to the network using IEEE and another host that is attached to the network using IEEE However, there is an issue at Layer 2, which requires the use of translational bridging. 6. Know that the VLAN trunking protocol (VTP) is used to propagate global VLAN information. 7. Know that VTP version 2 is preferable to VTP version 1 because it supports Token Ring VLANs. 8. Know that the Auto and Desirable trunking modes make a port able to convert a link to a trunk link when you are configuring a VLAN on fast Ethernet. 9. Know that you enter the set ip route command to configure a default route on a set-based command switch. 10. Know that a switch must be in client mode and the clear config all command must be executed on the switch and be rebooted in order to enter a switch into an existing VTP domain without altering the configuration of the systems currently on the domain. 12

16 11. Know that existing flow masks are purged when an access list is applied or when the aging time expires. 12. Know that the set mls enable command enables multilayer switching on a distribution layer switching engine. 13. Know that you will need to issue the mls rp ip and mls rp vtp-domain commands if you are using multilayer switching and you need to configure your distribution layer route processor to participate in the multiplayer switching. 14. Know that you will need to enable CGMP on the distribution switch, and enable CGMP on your distribution router to enable CGMP on a distribution layer device. 15. Know that the router creates a CGMP frame and forwards it to a well-known address to which all CGMP switches listen. 16. Know that when the LEDs flash during the Catalyst 5000 power up sequence that the power-up sequence is underway, but not yet completed. 17. Know that you would look for the port s link LED on the Switching Module as an indicator of an active link state on a Catalyst port. 18. Know that you will use the ip cgmp command to enable CGMP on a router interface. 19. Know that in order for the CGMP to operate correctly on a switch, the switch must have a network connection to a router running CGMP. 20. Know that you would use the set cgmp disable command to disable CGMP on a set command based switch. 21. Know that you can have no more than 90 meters from the punch down block to the switch when you are preparing to install a UTP cable connection. 13

17 22. Know that you need to set the port speed on your access switch on your primary distribution switch in order to configure the Fast Ethernet connection between your access switch and primary distribution switch. 23. Know that auto [sense] is the default for the 100Base-TX port, which negotiates full duplex connectivity if the connecting device supports it. 24. Know that when you have correctly connected a cable between a catalyst 1900 and 5000 series switch that the port status LED light located on both switches should light up and remain on. 25. In contrast to shared Ethernet, switched Ethernet on a catalyst switch provides greater access to bandwidth and connects directly to end users or other switches. 26. Know that you use a straight-through cable when connecting the 10BaseT switch ports to servers, workstations, and routers. 27. Know that you use a straight-through cable to connect the switched 10BaseT ports to a 10BaseT compatible workstation. 28. Know that shared bandwidth and switched bandwidth are functions represented by the Access layer in the campus network hierarchical model. 29. Know that port security limits the number of MAC addresses that are allowed to use the switch in order to prevent unauthorized users from gaining access to the network. 30. Know that IEEE 802-3Z is the IEEE specification for Gigabit Ethernet. 31. Know that ISL and 802.1Q are two good solutions for carrying VLANs over a single link. 32. Know that VTP configuration does not affect how you assign ports to VLAN 1 on a switch. 14

18 33. Know that before you can modify one of the VLAN names on a switch, the VTP domain name must be configured and the mode on this switch is server. 34. Know that in client mode you cannot create, change, or delete VLANs on a switch. 35. Know that the ip access-group command is used to apply an extended access list to an interface. 36. Know that the Auto trunking mode makes the port willing to convert a link to a trunk link when configuring a VLAN trunk for fast Ethernet. 37. Know that the mls rp ip command enables global multilayer on the distribution layer route processor. 38. Know that the show mls entry command displays the MLS cache. 39. Know that applying an outgoing access list to an interface purges any existing flow mask entries and then begins caching new IP-flow mask entries. 40. Know that the mls rp ip command enables an RSM interface for multilayer switching. 41. Know that you should use PortFast when you are connecting a single end station to a switch port. 42. Know that with a catalyst 6000 and 6500 series switch that the multilayer switch module is viewed as an external router connected to four full-duplex Gigabit Ethernet interfaces. 43. Know that you would use the set spantree portfast [module/port] command to enable fast EtherChannel. 44. Know that the set spantree portfast enable command ensures timely host access to the network in a spanning-tree environment. 15

19 45. Know that the multicast IP address translates to a MAC address of E-40-FF-2D. 46. Know that in the multicast transmission method frames are replicated as needed. 47. Know that IGMP query messages are addressed to all-host groups with the TTL set to (1) because IGMP query messages will remain on the directly attached subnetwork. 48. Know that with multicast transmission, one copy of each packet is sent using a special address that allows each client to choose if they receive the packet. 49. Know that loops in one spanning tree do not have any impact on the other spanning tree environments you have on multi spanning tree trunk. 50. Know that you must define the ISL encapsulation type and number on each interface to ensure that a route processor can forward traffic from multiple VLANs. 51. Know that if a host interface is constantly sending frame fragments or frames with CRC errors, any broadcast traffic created would be contained within the VLAN. 52. Know that the RSM has only 1 global MAC address that applies to interfaces on a device. 53. Know that you use the ip default-gateway command on an ISL-based command switch to define a gateway. 54. Know that with VLAN routing, a switched VLAN corresponds to an ISI trunk interface. 55. Know that to determine the best loop-free path to the root, the spanning tree protocol places the port with the lowest port ID in forwarding mode. 16

20 56. Know that multilayer switching is based on the route once, switch many model. 57. Know that you would use the show spantree command if you want to observe the spanning-tree port state on a set command-based switch. 58. Know that once the failure of the forwarding link is detected, uplinkfast allows the blocked port of a switch to quickly begin forwarding. 59. Know that if you properly place the root bridge to ensure an optimal STP topology, it will cause the spanning-tree protocol to improve operations as the network grows. 60. Know that if you set forward delay and max-age timers to maximum values that you can you reduce spanning-tree protocol BPDU traffic during extended periods of instability for VLANs. 61. Know that uplinkfast can be enabled on a spanning tree network with many pointto-point connections to significantly decrease the time of the listening and learning states. 62. Know that the default transaction time in spanning-tree protocol for a switch to move from blocking to forwarding state is 50 seconds. 63. Know that a combination of the priority number and the MAC address are the factors that determine who will become the root bridge in a spanning tree network. 64. Know that to take advantage of Fast EtherChannel ports you will need to configure all ports in a channel to operate at the same speed and in duplex mode, and assign all ports in a channel to the same VLAN or configure them as trunk ports. This will help avoid configuration problems that may cause the ports to be automatically disabled. 65. Know that the top slot of the chassis in a Catalyst 5000 switch contains the console and network ports in the supervisory engine module. 17

21 66. Know that when using the catalyst 5000 series switch SPAN (Switch Port Analyzer) feature, the function of the destination module/port identifier is to identify the port that mirrors traffic to a protocol analyzer. 67. Know that the high-end tools for troubleshooting and managing catalyst switches are from the graphic user interface applications in CWIS. 68. Know that the show spantree switch set-based command is comparable to the Cisco IOS-based router command show span. 69. Know that show span doesn t have the same meaning on the set-based switch and command-based switch. On the set-based switch, show span shows the switch port analyzer, whereas on the command-based switch, show span is a shortcut for show spantree, which shows the spanning tree configuration. To see the spanning tree configuration on the set-based switch, enter show spanning. 70. Know that the show trunk <module/port> command would be used to check a module/port and display the trunking status, VLAN active status, and VLAN that can use a link. 71. Know that you would use the duplex full command to configure a backup link on an IOS-based command switch for full duplex. 72. Know that Ethernet LAN switching uses IEEE 802.1D and Spanning-Tree Protocol. 73. Know that you would use the full duplex mode for the link between the distribution and core switches that is configured for autonegotiation to ensure the most efficient connection. 74. Know that you would use the set interface sc0 command do you enter to assign an IP address to an interface on a set based switch. 75. Know that if you want to use hardware-based bridging to switch between Ethernet and Fast Ethernet you need to increase the network bandwidth. Do not use the data link ISO layer to deal with these functions. 18

22 76. Know that if you want to use hardware-based switching to switch any flavor of Ethernet while increasing effective bandwidth and minimizing on complexity, implementing VLANs (Layer-2/data link) is the best solution. 77. Know that no switch command is required to configure a functional Ethernet connection between an end-user station and the access layer switch for default autosensing functionality. 78. Know that if you configure a switch as a VTP server off line and then connect it to the network, the switch may cause a loss of VLAN information by advertising an inaccurate revision of the domain. 79. Know that management domain and configuration revision number is the VTP information that a catalyst switch advertises on its trunk ports. 80. Know that disabled is the default setting of CGMP on a Cisco switch. 81. Know that by default, on a catalyst switch, the show logging command will allow you to check for error messages if they are redirected to another destination other than the console. 82. Know that a trunk link does not belong to a specific VLAN and that all VLANs can be transported on a single trunk link. 83. Know that if you are troubleshooting problems on the catalyst 5000 trunk and you notice that there is a disagreement about the VLAN configured to use this trunk, you can set or clear VLANs on both sides of the link so values do match. 84. Know that Cisco engineers typically recommend that VLAN ID 1 be used for management and troubleshooting only. 85. Know that in a VTP domain, a catalyst switch advertises the management domain name, the switch configuration revision number, the known VLANs, and their specific parameters. 19

23 86. Know that the native VLAN of the trunk link is the VLAN that the trunk uses if that link fails for any reason. 87. Know that each VTP advertisement contains only one domain name; separate VTP advertisements are required for each domain. 88. Know that the E-12-2C-11 MAC address is a multicast address. 89. Know that multicast ranges through are reserved for local purposes and are not forwarded by multicast routers. 90. Know that the definition of a broadcast transmission is only one copy of each frame is sent, using an address that reaches all the clients. 91. Know that before you can enable multicast, hosts must have an IP protocol that supports multicast and servers/clients must have applications that support IP multicast. 92. Know that the catalyst 2820 series are used with small to medium campus networks, and connect desktops and 10BaseT hubs to distribution switches with high-speed connections. 93. Know that the router switch feature card is a full-function IOS router installed as an integrated daughter card for the Catalyst 5000 series supervisor IIG and supervisor IIIG cards. 94. Know that the Catalyst 5000 and 6000 series switches are the most effective for distribution layer switching. 95. Know that a trunk link using IEEE 802.1Q trunk protocol or IEEE802.1Q trunk protocol, providing the SAID parameter is correctly set, can be configured between two Cisco switches each having identical modules, software revisions and VLAN configuration information. 20

24 Building Cisco Multilayer Switched Networks Practice Questions 1. You have several VLAN trunks in your Auto and Off modes. You are entering a new port. Which mode do you need the port to be set to in permanent trunking mode? A: on nonegotiate 2. The engineering department wants to interconnect users on multiple floors in the same building. Currently the department has only ten users, but plans to double that number within a matter of months. The engineers need to access CAD/CAM documents on the workgroup servers. What is the most appropriate access layer device? A: Catalyst 1900 series switch with 100BaseTX ports 3. Given the VTP mode table, place the VTP mode in the correct location at the top of the table. A: VTP modes of Operation Can they update other VTP capable devices on request or by default? Do they care about VTP advertisements? Can you preserve the global VLANs on reboot? VTP mode Transparent VTP mode Server VTP mode Client NO YES YES NO YES YES SOMETIMES YES NO 4. A company has experienced 300 percent growth over the last year and has recently installed a new multimedia center for distributing company information 21

25 throughout the campus. The company has requirements for gigabit-speed data transfer, high-availability, and intervlan routing between the end user and the enterprise server farms. What is the most appropriate device for the distribution layer? A: Catalyst 6000 series switch with 16-port gigabit Ethernet module 5. A company has a small network with about 25 users. They need to connect individual desktops and 10BaseT hubs to high-speed distribution switches that can work in conjunction with a 7x00 series external router. Which combination of hardware meets the minimum requirements of the network at this company? A: A catalyst 1900 series switch and a 2926G switch 6. You are using PC12. Using the network diagram and table below, provide the Access switch name and IP address, the VTP domain name and the first and second VLAN numbers for PC12. Access Switch Name Access Switch IP Address First VLAN number Secondary VLAN number Mod/Port Mod/Port Primary Fast Ethernet Link VTP Domain Name Secondary Fast Ethernet Link Mod/Port Mod/Port Primary Distribution Switch Name Trunks Mod/Ports Trunks Mod/Ports Secondary Distribution Switch Name 22

26 PC Access Switch Access Switch IP Address First VLAN Number Second VLAN Number VTP Domain Name PC1 AS bik1 PC2 AS bik1 PC3 AS bik1 PC4 AS bik1 PC11 AS bik2 A: PC12 AS bik2 7. You are using PC2. Using the network diagram and table below, provide the Access switch name and IP address, the VTP domain name and the first and second VLAN numbers for PC2. Access Switch Name Access Switch IP Address First VLAN number Secondary VLAN number Mod/Port Mod/Port Primary Fast Ethernet Link VTP Domain Name Secondary Fast Ethernet Link Mod/Port Mod/Port Primary Distribution Switch Name Trunks Mod/Ports Trunks Mod/Ports Secondary Distribution Switch Name 23

27 PC Access Switch Access Switch IP Address First VLAN Number Second VLAN Number VTP Domain Name PC1 AS bik1 PC3 AS bik1 PC4 AS bik1 PC11 AS bik2 PC12 AS bik2 A: PC2 AS bik1 8. A company needs to interconnect its four separate campus buildings with a highspeed, high-bandwidth backbone. Each building supports a separate department and each department supports IP, IPX, and AppleTalk. The network designer has already recommended a catalyst 6000 series switch at the distribution layer. What is the most appropriate device for the core? A: Catalyst 8500 series switch 9. A company has a single large campus network including six buildings interconnected with a high-speed, bandwidth backbone. A dual core configuration is necessary as redundant connections are required. They will be using a catalyst 6000 series switch at the distribution layer. Which device best meets their needs at the core layer? A: Catalyst 8500 series switch 10. Know these transmission method definitions. Transmission Method Definition 24

28 Unicast Multicast Broadcast Sends one copy of each packet to every client address. A single data stream is sent to many clients, and the client decides whether or not to listen to the address. One copy of each packet is sent, using a special address that allows it to reach all clients. 11. A company has redesigned its campus network to support three switch blocks that broadcast domains to each individual switch block, while still allowing intervlan routing within and between switch blocks. What is the most appropriate device at the distribution layer? A: Catalyst 5000 series switch with an internal RSM 12. An Ethernet media trunk link is to be configured to operate in ISL mode between two Cisco switches each having identical modules, software revisions and VLAN configuration information. Which condition would prevent the trunk link from operating in ISL trunking mode? A: The trunk encapsulation is different at each end of the link. 25

29 Index 10BaseT... 11, 12, 16, 18 20/80 model /20 rule Access layer... 2, 8, 12 Access Links... 4 active router... 7 bandwidth... 1, 2, 3, 4, 11, 12, 15, 20, 21 BPDU... 5, 6, 14 bridge... 5, 14 broadcast... 1, 5, 16, 21 Broadcast... 1, 2, 6, 8, 21 campus... 1, 3, 4, 12, 16, 18, 20, 21 Campus... 1, 2, 3, 4, 8 Catalyst... 11, 14, 16, 17, 18, 20, 21 CGMP... 11, 15 Client... 5, 18 console port... 3 convergence... 1 Core block... 3 core layer... 2, 21 Core layer... 2, 8 default gateway Default gateway... 7 Desirable... 5, 10 Distribution layer... 2, 8 dynamic... 8 encapsulation... 5, 13, 21 Ethernet... 3, 5, 10, 11, 12, 13, 15, 18, 21 Ethernet port... 3 failover... 2 fault tolerance... 7 FDDI... 3, 5 Frame Identification... 4 frames... 2, 5, 13 full duplex... 4, 15 hierarchical model... 2, 12 Hierarchical Model... 2, 8 Hot Stand By Routing Protocol... 7 HSRP... 7 Hybrid Links... 4 IEEE 802.1Q... 5, 17 IEEE 802-3Z Inter-switch link... 4 Inter-VLAN... 2, 6 IP address... 4, 13, 15, 19, 20 ISL... 4, 5, 12, 13, 21 LAN... 1, 3, 5, 15 LANE... 5 Layer2... 2, 4 LEDs load-balancing... 4, 6 MAC address... 5, 8, 13, 14, 16 Mainframe block... 3 media types... 3 MLS... 6, 7, 12 26

30 Multicast... 7, 8, 21 Multicasting... 2 Multilayer switching... 6 Nonegotiate... 5 packets... 2 port... 4, 5, 10, 11, 12, 13, 14, 15, 18 ports... 5, 11, 12, 14, 15, 18 Proxy ARP... 7 redundant... 6, 21 route processor... 6, 11, 12, 13 routers... 1, 7, 11, 16 Routers... 1 Routing protocol... 7 security... 4, 8, 12 Security... 2, 8 segmenting... 1, 6 Server... 3, 5, 18 Server block... 3 Spanning Tree... 6 stand by router... 7 static... 8, 10 subnet mask... 4 switch block... 4, 21 Switch block... 3 switched blocks... 2 switched network... 1 switches... 1, 3, 11, 14, 15, 16, 17, 18, 21 telnet... 8 throughput... 2 Timers... 6 Token Ring... 3, 5, 10 Transparent... 5, 18 transparent bridge... 5 Trunk Link... 5 Trunk Links... 4 unicast... 6 Unicast... 7, 21 UTP virtual LANs... 1 virtual router... 7 virtual terminal... 8 VLAN boundaries... 4 VLANs... 1, 4, 6, 10, 12, 13, 14, 16, 18 VTP... 5, 6, 10, 12, 15, 16, 18, 19, 20 VTP domain... 6 WAN block... 2, 3 27

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