Cisco 300-115 Implementing Cisco IP Switched Networks Online Training
Cisco 300-115 Online Training
The questions for 300-115 were last updated at Sep 30,2025.
- Exam Code: 300-115
- Exam Name: Implementing Cisco IP Switched Networks
- Certification Provider: Cisco
- Latest update: Sep 30,2025
Refer to the exhibit.
An engineer is configuring a trunking port-channel between switch 1 and switch 2 and receives an error message on switch 1.
Which option corrects this error?
- A . disabling BDPU guard on interface Fa0/23 of switch 2
- B . enabling BDPU guard on interface Fa0/23 of switch 1
- C . enabling BDPU guard on interface Fa0/23 of switch 2
- D . disabling BDPU guard on interface Fa0/23 of switch 1
Which two statements about IP Source Guard are true? (Choose two)
- A . When it is first enabled, It blocks all IP packets except DHCP packets
- B . It works together with DHCP snooping to verify source IP packets
- C . When it is configured on a Layer 2 port channel, it is applied only to the port channel interface
- D . When it is first enabled, It allows all IP packets except DHCP packets
- E . It must be enabled globally for all ports
- F . It is enabled automatically when DHCP snooping is enabled
Refer to the exhibit.
Which spanning-tree feature is configured on this interface?
- A . The command spanning-tree portfast trunk in the interface configuration mode was entered
- B . The command spanning-tree VLAN 10, 20, 30, 40 root primary in the interface configuration mode for faster convergence
- C . The command spanning-tree mst1 VLAN 10, 20, 30, 40 in the global configuration mode was entered
- D . The command spanning-tree portfast in the interface configuration mode was entered
- E . The command shut then a no shutdown in the interface configuration mode was entered
When you connect an internal switch to an upstream provider switch, which feature is most appropriate to implement to avoid potential broadcast storms?
- A . BPDU filter
- B . BPDU ignore
- C . loop guard
- D . BPDU guard
- E . flex links
Which two statements about 802.1q are true? (Choose two)
- A . Trunking devices add an 8-byte VLAN tag to all VLAN packets
- B . When it is enabled, the minimum Ethernet frame size is 68 bytes
- C . It inserts a 4-byte tag filed to the Ethernet frame
- D . The header is found within the Ethernet trailer
- E . Each frame contains a 12-byte VLAN identifier field
Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server?
- A . ip dhcp snooping information
- B . ip dhcp snooping
- C . ip dhcp trust
- D . ip dhcp snooping trust
If a switch stack is configured to use SDM template, where are the templates stored?
- A . TFTP server
- B . flash memory
- C . all stack members
- D . stack master
Which two statements about GLBP are true? (Choose two)
- A . Member devices send hello message to multicast address 224.0.0.39
- B . It supports up to 32 groups on a single interface
- C . The AVG assigns virtual MAC addresses to all group member
- D . Member devices can elect one or more AVGs
- E . Member devices must elect exactly one AVG
Refer to the exhibit.
If all switches in this environment are running PVSTP+, which switch is elected as the STP root switch when a new VLAN is added to the network?
- A . switch 3
- B . switch 5
- C . switch 4
- D . switch 1
- E . switch 2
Which two control protocol use the native VLAN 1 by default? (Choose two)
- A . STP
- B . CDP
- C . VTP
- D . LACP
- E . NTP
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