Cisco 300-115 Online Practice Questions and Exam Preparation

Cisco 300-115 Online Questions & Answers

• Question 131:

  Which technique automatically limits VLAN traffic to only the switches that require it?

  A. access lists
  B. DTP in nonegotiate
  C. VTP pruning
  D. PBR
  C. VTP pruning

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  Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic, such as broadcast, multicast, unknown, and flooded unicast packets to only the switches that require it. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. By default, VTP pruning is disabled. Reference: http:// www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ ios/12- 2SX/configuration/guide/book/ vtp.html#wp1020444

• Question 132:

  Several new switches have been added to the existing network as VTP clients. All of the new switches have been configured with the same VTP domain, password, and version. However, VLANs are not passing from the VTP server (existing network) to the VTP clients. What must be done to fix this?

  A. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name.
  B. Configure a different native VLAN on all new switches that are configured as VTP clients.
  C. Provision one of the new switches to be the VTP server and duplicate information from the existing network.
  D. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred.
  D. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred.

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  VTP allows switches to advertise VLAN information between other members of the same VTP domain. VTP allows a consistent view of the switched network across all switches. There are several reasons why the VLAN information can fail to

  be exchanged. Verify these items if switches that run VTP fail to exchange VLAN information:

  VTP information only passes through a trunk port. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. Make sure that if EtherChannels are created between two switches, only Layer 2

  EtherChannels propagate VLAN information.

  Make sure that the VLANs are active in all the devices.

  One of the switches must be the VTP server in a VTP domain. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. The VTP domain name must match and it is case sensitive. CISCO and cisco

  are two different domain names. Make sure that no password is set between the server and client. If any password is set, make sure that the password is the same on both sides. Reference: http://www.cisco.com/en/US/tech/tk389/tk689/

  technologies_tech_note09186a0080890613.shtml

• Question 133:

  Which three statements about RSPAN VLAN are true? (Choose three.)

  A. RSPAN VLAN traffic only flows on trunk ports.
  B. RSPAN VLAN prevents from carrying traffic.
  C. RSPAN VLAN can not be a private primary VLAN or secondary VLAN.
  D. All RSPAN VLAN traffic is flooded.
  E. RSPAN VLAN traffic only flows on access ports.
  F. RSPAN VLAN does not support Spanning-Tree Protocol.
  A. RSPAN VLAN traffic only flows on trunk ports.
  C. RSPAN VLAN can not be a private primary VLAN or secondary VLAN.
  D. All RSPAN VLAN traffic is flooded.

• Question 134:

  A question related to dual active detection for StackWise Virtual. (Choose two.)

  A. fast-hello
  B. PAgP
  C. recovery
  D. www.certbus.com
  A. fast-hello
  B. PAgP

• Question 135:

  Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. They have questions about how these two devices will perform in the event of a device failure.

  

  What is the virtual mac-address of HSRP group 1?

  A. 0000.0c07.ac02
  B. 4000.0000.0010
  C. 0000.0c07.ac01
  D. 4000.0000.ac01
  E. 4000.0000.ac02
  F. 0000.0c07.0010
  B. 4000.0000.0010

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  Issuing the "show standby" command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.0000.0010.

  

  

• Question 136:

  Drag and Drop

  Port Cost / Switch Port Priority / Port Priority

  Select and Place:

  

  

• Question 137:

  After an EtherChannel is configured between two Cisco switches, interface port channel 1 is in the down/ down state. Switch A is configured with channel-group 1 mode active, while Switch B is configured with channel-group 1 mode desirable. Why is the EtherChannel bundle not working?

  A. The switches are using mismatched EtherChannel negotiation modes.
  B. The switch ports are not configured in trunking mode.
  C. LACP priority must be configured on both switches.
  D. The channel group identifier must be different for Switch A and Switch B.
  A. The switches are using mismatched EtherChannel negotiation modes.

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  Here we have a situation where one switch is using active mode, which is an LACP mode, and the other is using desirable, which is a PAGP mode. You can not mix the LACP and PAGP protocols to form an etherchannel. Here is a summary of the various etherchannel modes: EtherChannel PAgP Modes Mode Description auto Places a port into a passive negotiating state, in which the port responds to PAgP packets it receives but does not start PAgP packet negotiation. This setting minimizes the transmission of PAgP packets. This mode is not supported when the EtherChannel members are from differ- ent switches in the switch stack (cross-stack EtherChannel). desirable Places a port into an active negotiating state, in which the port starts negotia- tions with other ports by sending PAgP packets. This mode is not supported when the EtherChannel members are from differ- ent switches in the switch stack (cross-stack EtherChannel). EtherChannel LACP Modes Mode Description active Places a port into an active negotiating state in which the port starts negotia- tions with other ports by sending LACP packets. passive Places a port into a passive negotiating state in which the port responds to LACP packets that it receives, but does not start LACP packet negotiation. This setting minimizes the transmission of LACP packets. Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12- 2_55_se/ configuration/guide/scg_2960/swethchl.html

• Question 138:

  Which command is required for root guard for Cisco device to place ID:2071948x?

  (Where x is the last digit ID)

  A. (config if)# spanning-tree guard root
  B. (config)# spanning-tree guard root
  C. (config-if)# spanning-tree root guard
  D. (config)# spanning-tree root guard
  A. (config if)# spanning-tree guard root

• Question 139:

  Which two statements about the HSRP priority are true?

  A. To assign the HSRP router priority in a standby group, the standby group-number priority priority-value global configuration command must be used.
  B. The default priority of a router is zero (0).
  C. The no standby priority command assigns a priority of 100 to the router
  D. Assuming that preempting has also been configured, the router with the lowest priority in an HSRP group would become the active router
  E. When two routers in an HSRP standby group are configured with identical priorities, the router with the highest configured IP address will become the active router
  C. The no standby priority command assigns a priority of 100 to the router
  E. When two routers in an HSRP standby group are configured with identical priorities, the router with the highest configured IP address will become the active router

• Question 140:

  Which two prerequisites are required for an HSRP interface to come up? (Choose two.)

  A. The virtual IP address must be in the same subnet as the interface IP address.
  B. Configure an physical IP address for the interface and enable that interface before HSRP becomes active
  C. It requires to configure more than one first-hop redundancy protocol on the same interface.
  D. Configure HSRP version 2 to interoperate with HSRP version 1.
  E. The virtual IP address is prohibited to be in the same subnet as the interface IP address under IPv4.
  A. The virtual IP address must be in the same subnet as the interface IP address.
  B. Configure an physical IP address for the interface and enable that interface before HSRP becomes active