QUESTION 81 What is the method used to filter traffic being bridged within a VLAN?

A. Ethernet maps

B. Router ACLs

C. VLAN maps

D. IP ACLsAnswer: C Explanation: www.cisco.com/univercd/cc/td/doc/product/lan/c3550/1219ea1/3550scg/swacl.htm VLAN ACLs or VLAN maps access-control all packets (bridged and routed). You can use VLAN maps to filter traffic between devices in the same VLAN.

QUESTION 82 Which command will allow a Layer 2 access port to move directly to the forwarding state and bypass the listing and learning states?

A. spanning-tree uplinkfast

B. spanning-tree port-priority

C. spanning-tree portfast

D. spanning-tree vlan vlan-id ret primary Answer: C Explanation: Spanning Tree PortFast causes an interface configured as a Layer 2 access port to enter the forwarding state immediately, bypassing the listening and learning states. You can use PortFast on Layer 2 access ports connected to a single workstation or server to allow those devices to connect to the network immediately, rather than waiting for spanning tree to converge. If the interface receives a bridge protocol data unit (BPDU), which should not happen if the interface is connected to a single workstation or server, spanning tree puts the port into the blocking state. To enable PortFast on a Layer 2 access port to force it to enter the forwarding state immediately, perform this procedure: Task Command Step 1 Specify an interface to configure. Switch(config)# interface {{fastethernet | gigabit Ethernet} slot/ port} | {port-channel port_channel_number} Step 2 Enable PortFast on a Layer 2 access port connected to a single workstation or server. You can use the no keyword to disable PortFast. Switch(config-if)# [no] spanning-tree portfast http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_12/config/stp_enha.pdf

QUESTION 83 Network topology Exhibit: You work as a network technician at the Cisco Highway.com main office close to Toronto. The number of employees on the 31st floor has been growing rapidly. You have ordered a new larges chassis. To temporarily meet the demand, you will take a Catalyst 2950 from the corporate testing center and install it in the 31st floor wire closet. 24 employees will be connected to this 2950 Catalyst. As you are an experienced Cisco Highway.com technician with CCNP and CCSP certifications you know the importance of installing the correct configuration prior to connect the device to the active network. You also remember that VLAN and VTP information remains even if the previous configuration is erased and the switch rebooted. At the current point of time you have already erased the configuration, rebooted, and eliminated any unnecessary VLAN information. However, you still have several tasks you have to complete before connecting the Cisco 2950 Catalyst switch to the network. You need to disable VTP, and ensure that all Furthermore, you must use global commands to configure the ports for the following tasks: configure the FastEthernet ports 0/1 to 0/24 as permanently non-trunking, and configure ports 0/12 through 0/24 as part of VLAN 20. To put it more specifically you are required to achieve the following tasks:

• disable VTP
• Ensure that all non-trunking interfaces do not participate in Spanning Tree by default by globally configuring PortFast. For the following two tasks, you are required to use global commands to configure the ports: Ensure all FastEthernet interface are in permanent non-trunking mode. Place FastEthernet interfaces 0/12 through 0/24 in VLAN 20. Start by clicking on host CertKiA. Answer: enable configure terminal Switch(config)#vtp mode transparent (disable vtp) Switch(config)#spanning-tree portfast default (Globally, enable portfast on all ports) Switch(config)#interface range fa0/1 - 24 (select interfaces) Switch(config-if)#switchport mode access (set ports for access mode, NOT Trunking) exit Switch(config-if)#interface range fa0/12 - 24 (select interfaces) Switch(config-if)#switchport access vlan 20 (assign ports to vlan 20) end copy running-config startup-config (save configuration)

QUESTION 84 Which statement is true about the STP Path Cost on a particular port?

A. It is known only to the local switch where the port resides.

B. It can be modified to help determine Root Bridge selection.

C. Modifying it can cause TCN BPDU to be sent to the Root Bridge.

D. When increased, it can provider higher bandwidth to a connecting port. Answer: C Explanation: http://www.everett.wednet.edu/schools/high/hmjackson/Tech/cisco/glossary/b.php#REF36726 BPDU Bridge protocol data unit. Spanning-Tree Protocol hello packet that is sent out at configurable intervals to exchange information among bridges in the network. See also PDU.

QUESTION 85 Which two VTP modes can create and delete VLABs on their own switches? (Choose two)

A. Client

B. Server

C. Transparent

D. Pass-through Answer: B, C Explanation: In VTP server mode, you can create, modify, and delete VLANs and specify other configuration parameters http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t11/ft1636nm.htm Reference for C : http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t11/ft1636nm.htm#14345

VTP Modes You can configure a switch to operate in any one of these VTP modes:

• Server-In VTP server mode, you can create, modify, and delete VLANs and specify other configuration parameters (such as VTP version) for the entire VTP domain. VTP servers advertise their VLAN configuration to other switches in the same VTP domain and synchronize their VLAN configuration with other switches based on advertisements received over trunk Links. VTP server is the default mode.
• Client-VTP clients behave the same way as VTP servers, but you cannot create, change, or delete VLANs on a VTP client.
• Transparent-VTP transparent switches do not participate in VTP. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. However, in VTP version 2, transparent switches do forward VTP advertisements that they receive out their trunk interfaces. If you configure the switch as VTP transparent, you can create and modify VLANs but the changes affect only the individual switch.

QUESTION 86 Which protocol enabled a group of routers to form a single virtual router and use the real IP address of a router as the gateway address?

A. Proxy ARP

B. HSRP

C. IRDP

D. VRRP

E. GLBP Answer: D Explanation: http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120st/120st18/st_vrrpx.ht m Virtual Router Redundancy Protocol (VRRP), enables group of routers to form a single virtual router? The Virtual Router Redundancy Protocol (VRRP) feature can solve the static configuration problem. VRRP enables a group of routers to form a single virtual router. The LAN clients can then be configured with the virtual router as their default gateway. The virtual router, representing a group of routers, is also known as a VRRP group.

QUESTION 87 Your PC is experiencing slow performance. After clearing counters, the results of show port indicate a high number of FCS and alignment errors. What is the most likely cause of this problem?

A. speed mismatch

B. duplex mismatch

C. trunk mode mismatch

D. VTP mode mismatch Answer: A, D Explanation: Not D: VTP mode mismatch should not cause FCS and alignment errors.

QUESTION 88 In which three HSRP states do routers send hello messages? (Choose three)

A. standby

B. learn

C. listen

D. speak

E. active Answer: A, D, E Explanation: Listen The router knows the virtual IP address, but is neither the active router nor the standby router. It listens for hello messages from those routers. Speak The router sends periodic hello messages, and is actively participating in the election of the active and/or standby router. A router cannot enter speak state unless it has the virtual IP address. Standby The router is a candidate to become the next active router, and sends periodic hello messages. Excluding transient conditions, there would be at most one router in the group in standby state. Active The router is currently forwarding packets that are sent to the group's virtual MAC address. The router sends periodic hello messages. Excluding transient conditions, there must be at most one router in active state in the group. State Definition Initial This is the starting state, and indicates that HSRP is not running. This state is entered via a configuration change, or when an interface first comes up. Learn The router has not determined the virtual IP address, and has not yet seen an authenticated hello message from the active router. In this state, the router is still waiting to hear from the active router.

QUESTION 89 Which of the following guidelines is not necessary, when configuring dynamic VLAN membership?

A. Configure VMPS server

B. Turn off trunking on the port

C. Turn off 802.1x port security D. Configure the spanning-tree PortFast feature Answer: C Reference: http://www.cisc.com/univercd/cc/td/doc/product/lan/cat6000/sw_5_3/codified/6000_cfg.htm Explanation: These guidelines and restrictions apply to dynamic port VLAN membership:

• You must configure VMPS before you configure ports as dynamic.
• When you configure a port as dynamic, spanning-tree PortFast is enabled automatically for that port. Automatic enabling of spanning-tree PortFast prevents applications on the host from timing out and entering loops caused by incorrect configurations. You can disable spanning-tree PortFast mode on a dynamic port.
• If you reconfigure a port from a static port to a dynamic port on the same VLAN, the port connects immediately to that VLAN. However, VMPS checks the legality of the specific host on the dynamic port after a certain period.
• Static secure ports cannot become dynamic ports. You must turn off security on the static secure port before it can become dynamic.
• Static ports that are trunking cannot become dynamic ports. You must turn off trunking on the trunk port before changing it from static to dynamic.

QUESTION 90 Which of the following could be used to provide a Layer 3 data path between separate VLANs? (Choose two)

A. A VLAN trunking

B. An external router

C. An internal processor

D. VLAN capable bridge

E. EtherChannel Answer: B, C Explanation: Ref B: The only connectivity that we want between VLANs is achieved at Layer 3 (L3) by a router. This is Inter-VLAN routing. To further simplify the diagrams, we will represent VLANs as different physical Ethernet segments, as we are not really interested in the specific bridging functions provided by the switch.

In the above diagram, the two VLANs are considered as two different Ethernet segments. Inter-VLAN traffic needs to go through the external router. If host A wants to communicate with host B, it will typically use the router as a default gateway. Ref:C The RSM is a Cisco 7500 Route Switch Processor (RSP) router inside of a Catalyst 5000 line card. You do not need to know a great deal about the architecture of the card to configure and troubleshoot it. However, having an idea of how the RSM is built will help to understand how it is different from a normal external router www.cisco.com/warp/public/473/56.html

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