300-115 practice test

1. Question 1 · 1

   What does the command vlan dot1q tag native accomplish when configured under global configuration?

   Choose one answer.

   • All frames within the native VLAN are tagged, except when the native VLAN is set to 1.
   • It allows control traffic to pass using the non-default VLAN.
   • It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s).
   • Control traffic is tagged.

   Read explanation

   The "vlan dot1q tag native" will tag all untagged frames, including control traffic, with the defined native VLAN.

2. Question 2 · 1

   Refer to the exhibit. Which EtherChannel negotiation protocol is configured on the interface f0/13 f0/15?

   Choose one answer.

   

   • Link Combination Control Protocol
   • Port Aggregation Protocol
   • Port Combination Protocol
   • Link Aggregation Control Protocol

   Read explanation

   PAgP modes are off, auto, desirable, and on. Only the combinations auto-desirable, desirable-desirable, and on-on will allow a channel to be formed. . 1. on: PAgP will not run. The channel is forced to come up. 2. off: PAgP will not run. The channel is forced to remain down. 3. auto: PAgP is running passively. The formation of a channel is desired; however, it is not initiated. 4. desirable: PAgP is running actively. The formation of a channel is desired and initiated. The Link Aggregate Control Protocol (LACP) trunking supports four modes of operation: ✑ On: The link aggregation is forced to be formed without any LACP negotiation .In other words, the switch neither sends the LACP packet nor processes any inbound LACP packet. This is similar to the on state for PAgP. ✑ Off: The link aggregation is not formed. We do not send or understand the LACP packet. This is similar to the off state for PAgP. ✑ Passive: The switch does not initiate the channel but does understand inbound LACP packets. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer, eventually to form the aggregation channel with the peer. This is similar to the auto mode in PAgP. ✑ Active: We can form an aggregate link and initiate the negotiation. The link aggregate is formed if the other end runs in LACP active or passive mode. This is similar to the desirable mode of PAgP. In this example, we see that fa 0/13, fa0/14, and fa0/15 are all in Port Channel 12, which is operating in desirable mode, which is only a PAgP mode.

3. Question 3 · 2

   Which command creates a login authentication method named "login" that will primarily use RADIUS and fail over to the local user database?

   Choose one answer.

   • (config)# aaa authentication login default radius local
   • (config)# aaa authentication login login radius local
   • (config)# aaa authentication login default local radius
   • (config)# aaa authentication login radius local

   Read explanation

   In the command "aaa authentication login login radius local" the second login is the name of the AAA method. It also lists radius first then local, so it will primarily use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable.

4. Question 4 · 3

   ABC, Inc. is a medium sized company, with an enterprise network (access, distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. The distribution switches are configured to use HSRP to provide a high availability solution. ✑ DSW1 primary device for VLAN 101 VLAN 102 and VLAN 105 ✑ DSW2 primary device for VLAN 103 and VLAN 104 ✑ A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device, unless GigabitEthernet1/0/1 on backup device has also failed. Troubleshooting has identified several issues. Currently all interfaces are up. Using the running configurations and show commands, you have been asked to investigate and respond to the following question. All interfaces are active. DSW2 has not become the active device for the VLAN 103 HSRP group. As related to the VLAN 103 HSRP group, what can be done to make the group function properly?

   Choose one answer.

   

   

   

   • On DSW1, disable preempt.
   • On DSW1, decrease the priority value to a value less than 190 and greater than 150.
   • On DSW2, increase the priority value to a value greater 200 and less than 250.
   • On DSW2, increase the decrement value in the track command to a value greater than 10 and less than 50.

   Read explanation

   From the output shown below of the HSRP status of DSW2, we see that the active router has a priority of 200, while the local priority is 190. We need to increase the priority of DSW2 to greater than 200, but it should be less than 250 so that if the gig 1/0/1 interface goes down, DSW1 will become active. DSW2 is configured to decrement the priority by 50 if this interface goes down, so the correct answer is to increase the priority to more than 200, but less than 250.

5. Question 5 · 4

   Refer to the exhibit. When troubleshooting a network problem, a network analyzer is connected to Port f0/1 of a LAN switch. Which command can prevent BPDU transmission on this port?

   Choose one answer.

   

   • spanning-tree portfast bpduguard enable
   • spanning-tree bpduguard default
   • spanning-tree portfast bpdufilter default
   • no spanning-tree link-type shared

6. Question 6 · 4

   DRAG DROP - Select and Place: Prioritize the traffic types by dragging them from the left to the appropriate Cisco priority level on the right. Put the highest priority at the bottom. Select and Place:

   Arrange the options in the correct order.

   

   • network management
   • video-interactive
   • IP routing
   • voice
   • video-streaming
   • call signaling

7. Question 7 · 4

   Which statement about HSRP, GLBP, and VRRP is true?

   Choose one answer.

   • VRRP group members communicate using multicast address 224.0.0.102.
   • MAC address 0000.0c07.acOc indicates that default gateway redundancy is provided through GLBP.
   • HSRP group members communicate using multicast address 224.0.0.18.
   • GLBP uses UDP port 3222 (source and destination) for hello messages.

8. Question 8 · 4

   What is the effect of configuring the following command on a switch? Switch(config) # spanning-tree portfast bpdufilter default

   Choose one answer.

   • If BPDUs are received by a port configured for PortFast, then PortFast is disabled and the BPDUs are processed normally.
   • If BPDUs are received by a port configured for PortFast, they are ignored and none are sent.
   • If BPDUs are received by a port configured for PortFast, the port transitions to the forwarding state.
   • The command enables BPDU filtering on all ports regardless of whether they are configured for BPDU filtering at the interface level.

9. Question 9 · 4

   What two things occur when an RSTP edge port receives a BPDU? (Choose two.)

   Choose all answers that apply.

   • The port immediately transitions to the forwarding state.
   • The switch generates a Topology Change Notification BPDU.
   • The port immediately transitions to the err-disable state.
   • The port becomes a normal STP switch port.

10. Question 10 · 4

    In the hardware address 0000.0c07.ac0a, what does 07.ac represent?

    Choose one answer.

    • vendor code
    • HSRP group number
    • HSRP router number
    • HSRP well-known physical MAC address
    • HSRP well-known virtual MAC address

11. Question 11 · 4

    Which statement is true about RSTP topology changes?

    Choose one answer.

    • Any change in the state of the port generates a TC BPDU.
    • Only nonedge ports moving to the forwarding state generate a TC BPDU.
    • If either an edge port or a nonedge port moves to a block state, then a TC BPDU is generated.
    • Only edge ports moving to the blocking state generate a TC BPDU.
    • Any loss of connectivity generates a TC BPDU.

12. Question 12 · 4

    What condition was match during etherchannel configuration.

    Choose all answers that apply.

    • Spanning tree port priority
    • Spanning tree cost
    • Interface Description
    • Trunk mode
    • Trunk allow vlan

13. Question 13 · 4

    In a switch stack where is the SDM template stored?

    Choose one answer.

    • All switches in stack
    • Master switch
    • Flash memory

14. Question 14 · 4

    Refer to exhibit, which two statements correctly indicate when an SNMP trap is set to the switch? (Choose two.)

    Choose all answers that apply.

    

    • When a new workstation connects to port F0/1
    • When 61 MAC address are in the switch
    • When 61 percent of the Address table capacity is used
    • When the switch loses power and reboots
    • When the phone previously on Fa0/2 is now connect to Fa0/5

15. Question 15 · 4

    What is the command for configuring root guard?

    Choose one answer.

    • (config)#spanning-tree guard root
    • (config-if)#spanning-tree guard root
    • (config-if)#spanning-tree root guard
    • (config-if)#spanning tree guard root
    • (config)#spanning-tree root guard

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