100% Correct 300-115 Preparation 2021

NEW QUESTION 1

In regards to Cisco Virtual Switching System, which technology is needed between two switches for them to
act as one network element and share control information and data traffic ?

• A. virtual port channel
• B. EtherChannel
• C. virtual switch link
• D. trunk

Answer: C

NEW QUESTION 2

When a Cisco Catalyst switch that is configured in VTP server mode is first booted, which two VLAN ranges are loaded on the switch?

• A. all VLAN are in the VLAN database.
• B. VLANs greater than 1005 in the startup-config file
• C. the first 1005 VLANs in the VLAN database file
• D. the first 1005 VLANs in the startup-config file
• E. VLANs greater than 1005 in the VLAN database file

Answer: BD

NEW QUESTION 3

You have been asked to install and configure a new switch in a customer network. Use the console access to the existing and new switches to configure and verify correct device configuration.



You are adding new VLANs. VLAN500 and VLAN600 to the topology in such way that you need to configure SW1 as primary root for VLAN 500 and secondary for VLAN 600 and SW2 as primary root for VLAN 600 and secondary for VLAN 500. Which configuration step is valid?

• A. Configure VLAN 500 & VLAN 600 on both SW1 & SW2
• B. Configure VLAN 500 and VLAN 600 on SW1 only
• C. Configure VLAN 500 and VLAN 600 on SW2 only
• D. Configure VLAN 500 and VLAN 600 on SW1 ,SW2 and SW4
• E. On SW2; configure vtp mode as off and configure VLAN 500 and VLAN 600; configure back to vtp server mode.

Answer: A

Explanation:
By issuing the “show vtp status command on SW2, SW2, and SW4 we see that both SW1 and SW2 are operating in VTP server mode, but SW4 is a client, so we will need to add both VLANs to SW1 and SW2.

NEW QUESTION 4

Drag the description from the left to add on appropriate section of Port Cost / Switch Port Priority / Port Priority

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 5

What is the default HSRP priority?

• A. 50
• B. 100
• C. 120
• D. 1024

Answer: B

NEW QUESTION 6

Ferris Plastics, 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?

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

Answer: C

Explanation:
The reason DSW2 has not become the active switch for Vlan103 is because the priority value of DSW1 is higher than that of DSW2. In order to make DSW2 become the active switch, we need to increase DSW2’s priority (to higher than 200) or decrease DSW1’s priority (to lower than 190) -> B and C are correct.
But there is another requirement from this question that “A failure on gig1/0/1 on primary device should cause the primary device to release its status as the primary device, unless GigabitEthernet 1/0/1 on backup device has also failed”. This requirement makes answer B incorrect. For example, we choose to decrease the priority value on DSW1 to 160 (according to answer B) then DSW2 will become active switch (that is good). When Gi1/0/1 on DSW2 goes down, the priority of DSW2 will be 190 – 50 = 140 < 160 -> DSW1 will become new active switch (it is good, too). But when Gi1/0/1 on DSW1 also goes down, the priority of DSW1 will be 160
– 10 = 150 and it is still greater than 140 of DSW2 -> DSW2 cannot retake the active role as the requirement of this question.

NEW QUESTION 7

Which SDM template disables routing and supports the maximum number of unicast MAC addresses?

• A. VLAN
• B. access
• C. default
• D. routing

Answer: A

NEW QUESTION 8

Which two commands prune VLAN 10 from a switch interface? (Choose two.)

• A. switchport trunk allowed except vlan 10
• B. switchport trunk native vlan 10
• C. switchport trunk allowed remove vlan 10
• D. switchport trunk allowed vlan add 10
• E. no vlan 10

Answer: BC

NEW QUESTION 9

Which technique allows specific VLANs to be strictly permitted by the administrator?

• A. VTP pruning
• B. transparent bridging
• C. trunk allowed VLANs
• D. VLAN access-list
• E. L2P tunneling

Answer: C

NEW QUESTION 10

Drag and drop the characteristic from the left onto the matching STP timer variables on the right.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 11

Which option is the minimum frame size of an 802.1Qframe?

• A. 64 bytes
• B. 68 bytes
• C. 1518 bytes
• D. 1522 bytes

Answer: B

NEW QUESTION 12

Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router?

• A. virtual router master
• B. virtual router backup
• C. virtual router active
• D. virtual router standby

Answer: A

NEW QUESTION 13

A network engineer is trying to prevent users from connecting unauthorized equipment to a production network. Which option can be campus-wide to satisfy this requirement?

• A. IP Source Guard
• B. switch port block
• C. Uplink fast
• D. private VLAs
• E. BPDU Guard

Answer: A

NEW QUESTION 14

In a switch stack environment, what is the total bidirectional traffic flow between two logical counter-rotating paths?

• A. 16 Gbps
• B. 32 Gbps
• C. 64 Gbps
• D. 128 Gbps

Answer: B

NEW QUESTION 15

Refer to the exhibit.

Which two effects of this configuration are true? (Choose two.)

• A. R1 becomes the active router
• B. If R2 goes down, R1 becomes active but reverts to standby when R2 comes back online
• C. Hello messages are sent to multicast address 224.0.0.5.
• D. If R1 goes down, R2 becomes active but reverts to standby when R1 comes back online.
• E. R1 goes down, R2 becomes active and remains the active device when R1 comes back online
• F. R1 becomes the standby router.

Answer: AE

NEW QUESTION 16

In which two ways can a port respond to a port-security violation? (Choose two.)

• A. The port enters the en-disabled state
• B. The Security Violation counter is incremented and the port sends an SNMP trap
• C. The Security Violation counter is incremented and the port sends a critical syslog message to the console
• D. The port triggers an EEM script to notify support staff and continues to forward traffic normally
• E. The port immediately begins to drop all traffic.
• F. The port enters the shutdown state.

Answer: AB

NEW QUESTION 17

Which three functions does Dynamic ARP Inspection perform with invalid IP-to MAC address bindings?
(Choose there.)

• A. accepts
• B. deletes
• C. discards
• D. bypasses
• E. intercepts
• F. logs

Answer: CEF

NEW QUESTION 18

Which two options are advantages of deploying VTPv3? (Choose two)

• A. It stores the VTP domain password securely as a SHA-1 hash
• B. It adds on FCS field at the end of each VTP frame for consistency checking
• C. It supports the propagation of private VLANs.
• D. It supports the use of AES to encrypt VTP messaging
• E. It can be configured to allow only one VTP server to make changes to the VTP domain

Answer: CE

NEW QUESTION 19

Which command sequence do you enter to configure an rspan vlan ?

• A. Vlan 4097 remote-span
• B. Vlan 4097 name RSPAN
• C. Vlan 51
• D. Remote-span
• E. Vlan 51
• F. Name rspan

Answer: CD

NEW QUESTION 20

Which statement describes the result of configuring SPAN on a Cisco device?

• A. If not carefully planned, SPAN can lead to loops between source and destination ports.
• B. SPAN doubles traffic internally
• C. SPAN blocks for normal use one additional port for each configured source port
• D. SPAN halves the capacity of the source port.

Answer: C

NEW QUESTION 21

When you design a switched network using VTPv2, how many VLANs can be used to carry user traffic?

• A. 1000
• B. 1001
• C. 1024
• D. 2048
• E. 4095
• F. 4096

Answer: B

NEW QUESTION 22

Which two statements about PortFast are true?

• A. The port moves immediately to the forwarding state when a device is connected
• B. it allows the port to skip the learning state only.
• C. It forces the port to skip all spanning-tree states
• D. It is most appropriate for ports that provide connectivity to individual workstations or servers
• E. The port is error-disabled if it attempts to move into the listening or /earning states.

Answer: AD

NEW QUESTION 23

Which command do you enter to enable Dynamic ARP Inspection for VLAN 15?

• A. SW1(config-vlan)#ip arp inspection vlan 15
• B. SW1(config-v1an)#ip arp inspection trust
• C. SW1(config)#ip arp inspection vlan 15
• D. SW1(config-if)#ip arp-inspection trust

Answer: C

NEW QUESTION 24

Which two authentication types does VRRP support? (Choose two.)

• A. Plain-text
• B. CHAP
• C. PAP
• D. 802.1x
• E. MD5

Answer: AE

NEW QUESTION 25

The network manager has requested that several new VLANs (VLAN 10, 20, and 30) are allowed to traverse the switch trunk interface. After the command switchport trunk allowed vlan 10,20,30 is issued, all other existing VLANs no longer pass traffic over the trunk. What is the root cause of the problem?

• A. The command effectively removed all other working VLANs and replaced them with the new VLANs.
• B. VTP pruning removed all unused VLANs.
• C. ISL was unable to encapsulate more than the already permitted VLANs across the trunk.
• D. Allowing additional VLANs across the trunk introduced a loop in the network.

Answer: A

NEW QUESTION 26

Which two commands display the VLANs that are present in the VLAN database? (Choose two)

• A. show vlan brief
• B. show running-config
• C. show vlan
• D. show vlan databas
• E. show vlan id

Answer: AC

NEW QUESTION 27

A workstation technician moves a PC from one office desk to another. Before the move the PC has network connectivity After the move as the PC plugged into the now network port, it loses network connectivity and the network switch port becomes err disabled Which option can cause the Issue?

• A. wrong VLAN
• B. wrong switch port mode
• C. port security
• D. speed issue

Answer: C

NEW QUESTION 28

Which VTP mode you configure on a VTP domain so that the switch with the highest VTP configuration revision number in the domain propagates VLAN information to the other switches?

• A. client mode
• B. server mode
• C. off mode
• D. transparent mode

Answer: B

NEW QUESTION 29

When port security is configured on a switch, which violation mode is the default?

• A. shutdown
• B. logging
• C. no change
• D. error disable

Answer: A

NEW QUESTION 30

Refer to the exhibit.

The users in an engineering department that connect to the same access switch cannot access the network. The network engineer found that the engineering VLAN is missing from the database. Which action resolves this problem?

• A. Disable VTP pruning and disable 802.1q.
• B. Update the VTP revision number.
• C. Change VTP mode to server and enable 802.1q.
• D. Enable VTP pruning and disable 802.1q.

Answer: C

NEW QUESTION 31
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