Cisco 300-115 Online Practice Questions and Exam Preparation

Cisco 300-115 Online Questions & Answers

• Question 651:

  Refer to the exhibit.

  

  f1/0 and f1/1 have the same end-to-end path cost to the designated bridge. Which action is needed to modify the Layer 2 spanning-tree network so that traffic for PC1 VLAN from switch SW3 uses switchport f1/1 as a primary port?

  A. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16.
  B. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0.
  C. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16.
  D. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0.
  C. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16.

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  Explanation: If a loop occurs, STP considers port priority when selecting a LAN port to put into the forwarding state. You can assign higher priority values to LAN ports that you want STP to select first and lower priority values to LAN ports that you want STP to select last. If all LAN ports have the same priority value, STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. The possible priority range is 0 through 240 (default 128), configurable in increments of 16. A lower path cost represents higher-speed transmission and is preferred. Reference: http://www.cisco.com/ en/US/docs/ switches/lan/catalyst2950/software/release/12.1_9_ea1/config uration/guide/ swstp.html#wp1105354

• Question 652:

  Which three VLANs are part of the extended range to available VLANs? (Choose three. )

  A. 4094
  B. 1001
  C. 4095
  D. 4195
  E. 3000
  F. 100G
  A. 4094
  E. 3000
  F. 100G

• Question 653:

  Which two items are included in a STP BPDU? (Choose two.)

  A. MAC address of the sending device.
  B. Bridge ID of the root switch.
  C. Port priority number of the sending device.
  D. IP address of the sending device
  E. STP timer values
  B. Bridge ID of the root switch.
  C. Port priority number of the sending device.

• Question 654:

  Which two statements about LLDP frames are true? (Choose two)

  A. The destination MAC address in a LLDP frame is a multicast address.
  B. All switches forward the destination MAC address in a LLDP frame.
  C. Each LLDP frame includes a field containing the CoS value.
  D. They have an EtherType of 0x8080.
  E. They contain a CRC for error checking.
  F. Each LLDP frame contains a sequence of TLVs.
  A. The destination MAC address in a LLDP frame is a multicast address.
  F. Each LLDP frame contains a sequence of TLVs.

• Question 655:

  Which three combinations of PAgP allow the formation of a channel? (Choose three.)

  A. auto-desirable
  B. on-off
  C. on-on
  D. desirable-desirable
  E. on-desirable
  A. auto-desirable
  C. on-on
  D. desirable-desirable

• Question 656:

  Which feature places a port in an err-disabled state when it receives an unanticipated BPDU?

  A. loop guard
  B. root guard
  C. BPDU guard
  D. BPDU filtering
  C. BPDU guard

• Question 657:

  Refer to the exhibit.

  

  Which statement about switch S1 is true?

  A. Physical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol.
  B. Logical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol.
  C. Physical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol.
  D. Logical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol.
  A. Physical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol.

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  These three ports show that they are in Port Channel 1, and the (SU) means they are in use and operating at layer 2. The protocol used for this port channel shows as LACP, which is a standards based protocol, as opposed to PAgP, which is Cisco proprietary.

• Question 658:

  What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements?

  A. 30 seconds
  B. 60 seconds
  C. 120 seconds
  D. 300 seconds
  B. 60 seconds

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  : Cisco Discovery Protocol is a Layer 2, media-independent, and network-independent protocol that networking applications use to learn about nearby, directly connected devices. Cisco Discovery Protocol is enabled by default. Each device configured for Cisco Discovery Protocol advertises at least one address at which the device can receive messages and sends periodic advertisements (messages) to the well-known multicast address 01:00:0C:CC:CC:CC. Devices discover each other by listening at that address. They also listen to messages to learn when interfaces on other devices are up or go down. Advertisements contain time-to- live information, which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it. Advertisements supported and configured in Cisco software are sent, by default, every 60 seconds. Reference: http://www.cisco.com/en/US/docs/ios-xml/ios/ cdp/ configuration/15- mt/nm-cdp- discover.html

• Question 659:

  Which of the following commands are valid to configure DHCP snooping with Dynamic ARP Inspection for a VLAN? (Choose four.)

  A. (config)# ip dhcp snooping vlan arp trust
  B. (config)# ip dhcp snooping
  C. (config)# ip dhcp snooping vlan 10
  D. (config)# ip arp inspection vlan 10
  E. (config)# interface ethernet 0/0 (config-if)# ip dhcp snooping trust (config-if)# ip arp inspection trust
  F. (config)# interface ethernet 0/0 (config-if)# ip dhcp arp inspect-snoop trust
  B. (config)# ip dhcp snooping
  C. (config)# ip dhcp snooping vlan 10
  D. (config)# ip arp inspection vlan 10
  E. (config)# interface ethernet 0/0 (config-if)# ip dhcp snooping trust (config-if)# ip arp inspection trust

• Question 660:

  Which command configures an HSRP group to become a slave of another HSRP group?

  A. standby slave
  B. standby group track
  C. standby follow
  D. standby group backup
  C. standby follow

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  Perform this task to configure multiple HSRP client groups. The "standby follow" command configures an HSRP group to become a slave of another HSRP group. HSRP client groups follow the master HSRP with a slight, random delay so that all client groups do not change at the same time. Reference: http://www.cisco.com/ en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp- hsrp- mgo.html