Cisco 300-115 Online Practice Questions and Exam Preparation

Cisco 300-115 Online Questions & Answers

• Question 761:

  What would happen if a switch gets a packet with Option 82 with the IP address of 192.168.1.254?

  A. Drop it
  B. Forward it
  C. Stop the Option 82 and replace the source MAC address, and forward it (with its own source MAC address).
  D. Stop the Option 82 and replace the source IP address to the switch management IP address and forward it.
  B. Forward it

• Question 762:

  Which three new features of VTPv3 are true? (Choose three.)

  A. It offers better administrative control over which device is allowed to update other devices view of VLAN topology
  B. Unintended and disruptive changes are reduced and availability has increased.
  C. The functionality of the VLAN environment has been expande
  D. It supports up to VLAN range of 2094
  E. The functionality of the VLAN environment has reduced for improvement
  A. It offers better administrative control over which device is allowed to update other devices view of VLAN topology
  B. Unintended and disruptive changes are reduced and availability has increased.
  C. The functionality of the VLAN environment has been expande

• Question 763:

  What happens if an interface within channel group is configure as SPAN destination?

  A. portchannel will forward traffic to source span
  B. will not be operational
  C. the link will be in error-disable
  B. will not be operational

• Question 764:

  What is the function of NSF?

  A. forward traffic simultaneously using both supervisors
  B. forward traffic based on Cisco Express Forwarding
  C. provide automatic failover to back up supervisor in VSS mode
  D. provide nonstop forwarding in the event of failure of one of the member supervisors
  D. provide nonstop forwarding in the event of failure of one of the member supervisors

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  VSS is network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch, increasing operational efficiency, boosting nonstop communications, and scaling system bandwidth capacity to

  1.4 Tbps. Switches would operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440). VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE. In a VSS, the data plane and switch fabric with capacity of 720 Gbps of supervisor engine in each chassis are active at the same time on both chassis, combining for an active 1400- Gbps switching capacity per VSS. Only one of the virtual switch members has the active control plane. Both chassis are kept in sync with the inter-chassis Stateful Switchover (SSO) mechanism along with Nonstop Forwarding (NSF) to provide nonstop communication even in the event of failure of one of the member supervisor engines or chassis. Reference: http://ciscorouterswitch.over-blog.com/article- cisco-catalyst-6500-series-vss-1440- 124536783.html

• Question 765:

  Refer to the exhibit. An engineer has run the show EtherChannel summary command and the output is displayed. Which statement about the status of the EtherChannel is true?

  A. The EtherChannel is operational and configured for PAgP
  B. The EtherChannel is down because of a mismatched EtherChannel protocol
  C. The EtherChannel is down and configured for LACP
  D. The EtherChannel is operational and is using no EtherChannel protocol
  D. The EtherChannel is operational and is using no EtherChannel protocol

• Question 766:

  Refer to the exhibit.

  

  Which two statements about the network environment are true? (Choose two)

  A. The two aaaa.aaaa.aaaa MAC address entries must be from the same VLAN
  B. Interfaces Fa0/a and Fa0/3 cannot communicate via Layer 2 switching
  C. Interfaces Fa0/1 and Fa0/2 cannot communicate via Layer 2 switching
  D. The two aaaa.aaaa.aaaa MAC address entries must be from different VLANs
  E. Interfaces Fa0/2 and Fa0/3 can communicate via Layer 2 switching.
  C. Interfaces Fa0/1 and Fa0/2 cannot communicate via Layer 2 switching
  D. The two aaaa.aaaa.aaaa MAC address entries must be from different VLANs

• Question 767:

  Which command enables you to detemine the spanning-tree guard features that are enable globally?

  A. show spanning-tree
  B. show spanning-tree active
  C. show spanning-tree detail
  D. show spanning-tree summary
  C. show spanning-tree detail

• Question 768:

  A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. For more protection against malicious attacks, the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. Which solution ensures that the server maintains network reachability in the future?

  A. Disable DHCP snooping information option.
  B. Configure a static DHCP snooping binding entry on the switch.
  C. Trust the interface that is connected to the server with the ip dhcp snooping trust command.
  D. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify mac- address command.
  B. Configure a static DHCP snooping binding entry on the switch.

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  Explanation: Dynamic ARP inspection is a security feature that validates ARP packets in a network. It intercepts, logs, and discards ARP packets with invalid IP-to- MAC address bindings. This capability protects the network from certain manin-the-middle attacks. Dynamic ARP inspection ensures that only valid ARP requests and responses are relayed. The switch performs these activities:

  Intercepts all ARP requests and responses on untrusted ports

  Verifies that each of these intercepted packets has a valid IP-to-MAC address binding before updating the local ARP cache or before forwarding the packet to the appropriate destination.

  Drops invalid ARP packets Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database, the DHCP snooping binding database. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. If the ARP packet is received on a trusted interface, the switch forwards the packet without any checks. On untrusted interfaces, the switch forwards the packet only if it is valid. To ensure network reachability to the server, configure a static DHCP snooping binding entry on the switch. Reference: http://www.cisco.com/c/ en/us/td/ docs/switches/lan/catalyst3750/software/release/12- 2_55_se/configuration/ guide/scg3750/ swdynarp.html

• Question 769:

  Which statement about RSPAN session is true?

  A. Only the source switch in a session must support RSPAN.
  B. The same RSPAN VLAN is used for a RSPAN session on all switches.
  C. At least one access port must be configured in the RSPAN VLAN.
  D. RSPAN support by default monitors at Layer 2.
  B. The same RSPAN VLAN is used for a RSPAN session on all switches.

• Question 770:

  Which two statements about GLBP are true? (Choose two.)

  A. Member devices send hello messages to multicast address 224.0.0.39.
  B. Member devices must elect exactly one AVG.
  C. Member device can elect one more AVGs
  D. The AVG assigns virtual MAC addresses to all group members.
  E. It supports up to 32 groups on a single interface
  B. Member devices must elect exactly one AVG.
  D. The AVG assigns virtual MAC addresses to all group members.