Cisco 300-115 Online Practice Questions and Exam Preparation

Cisco 300-115 Online Questions & Answers

• Question 11:

  The following command was issued on a router that is being configured as the active HSRP router.

  standby ip 10.2.1.1

  Which statement is true about this command?

  A. This command will not work because the HSRP group information is missing
  B. The HSRP MAC address will be 0000 0c07 ac00
  C. The HSRP MAC address will be 0000 0c07 ac01.
  D. The HSRP MAC address will be 0000.070c ad01.
  E. This command will not work because the active parameter is missing
  B. The HSRP MAC address will be 0000 0c07 ac00

• Question 12:

  Where does a subordinate switch in a stack store the information about VLANs?

  A. NVRAM: vlan.xml
  B. FLASH: vlan.xml
  C. NVRAM: vlan.txt
  D. FLASH: vlan.txt
  E. NVRAM: vlan.dat
  F. FLASH: vlan.dat
  F. FLASH: vlan.dat

• Question 13:

  RSPAN has been configured on a Cisco Catalyst switch; however, traffic is not being replicated to the remote switch. Which type of misconfiguration is a cause?

  A. The RSPAN designated VLAN is missing the remote span command.
  B. The local and remote RSPAN switches are configured using different session IDs.
  C. The local RSPAN switch is replicating only Rx traffic to the remote switch.
  D. The local switch is overloaded with the amount of sourced traffic that must be replicated to the remote switch.
  A. The RSPAN designated VLAN is missing the remote span command.

• Question 14:

  A network engineer must implement Ethernet links that are capable of transporting frames and IP traffic for different broadcast domains that are mutually isolated. Consider that this is a multivendor environment. Which Cisco IOS switching feature can be used to achieve the task?

  A. PPP encapsulation with a virtual template
  B. Link Aggregation Protocol at the access layer
  C. dot1q VLAN trunking
  D. Inter-Switch Link
  C. dot1q VLAN trunking

  ---

  Here the question asks for transporting "frames and IP traffic for different broadcast domains that are mutually isolated" which is basically a long way of saying VLANs so trunking is needed to carry VLAN information. There are 2 different methods for trunking, 802.1Q and ISL. Of these, only 802.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol.

• Question 15:

  A network engineer is setting up a new switched network. The network is expected to grow and add many new VLANs in the future. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances?

  A. RSTP
  B. PVST
  C. MST
  D. PVST+
  E. RPVST+
  C. MST

  ---

  Multiple Spanning Tree (MST) extends the IEEE 802.1w RST algorithm to multiple spanning trees. The main purpose of MST is to reduce the total number of spanning-tree instances to match the physical topology of the network and thus reduce the CPU cycles of a switch. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. MST, on the other hand, uses a minimum number of STP instances to match the number of physical topologies present. Figure 3-15 shows a common network design, featuring an access Switch A, connected to two Building Distribution submodule Switches D1 and D2. In this setup, there are 1000 VLANs, and the network administrator typically seeks to achieve load balancing on the access switch uplinks based on even or odd VLANs--or any other scheme deemed appropriate.

  Figure 3-15: VLAN Load Balancing Figure 3-15 illustrates two links and 1000 VLANs. The 1000 VLANs map to two MST in- stances. Rather than maintaining 1000 spanning trees, each switch needs to maintain only two spanning trees, reducing the need for switch resources. Reference: http://ciscodocuments.blogspot.com/2011/05/chapter-03-implementing-spanning- tree_19.html

• Question 16:

  Drag and Drop

  Drag the appropriate from left to right on description.

  Select and Place:

  

  

• Question 17:

  DHCP snooping and IP Source Guard have been configured on a switch that connects to several client workstations. The IP address of one of the workstations does not match any entries found in the DHCP binding database. Which statement describes the outcome of this scenario?

  A. Packets from the workstation will be rate limited according to the default values set on the switch.
  B. The interface that is connected to the workstation in question will be put into the errdisabled state.
  C. Traffic will pass accordingly after the new IP address is populated into the binding database.
  D. The packets originating from the workstation are assumed to be spoofed and will be discarded.
  D. The packets originating from the workstation are assumed to be spoofed and will be discarded.

  ---

  Explanation: The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). An entry in this table has an IP address, its associated MAC address, and its associated VLAN number. The switch uses the IP source binding table only when IP source guard is enabled. You can configure IP source guard with source IP address filtering, or with source IP and MAC address filtering. When IP source guard is enabled with this option, IP traffic is filtered based on the source IP address. The switch forwards IP traffic when the source IP address matches an entry in the DHCP snooping binding database or a binding in the IP source binding table. When IP source guard is enabled with this option, IP traffic is filtered based on the source IP and MAC addresses. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table. If there is no match, the packets are assumed to be spoofed and will be discarded. Reference: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series- switches/72846- layer2-secftrs-catl3fixed.html#ipsourceguard

• Question 18:

  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
  A. virtual router master

  ---

  VRRP Definitions VRRP Router A router running the Virtual Router Redundancy Protocol. It may participate in one or more virtual routers. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. A VRRP Router may backup one or more virtual routers. IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address (es). This is the router that, when up, will respond to packets addressed to one of these IP addresses for ICMP pings, TCP connections, etc. Primary IP Address An IP address selected from the set of real interface addresses. One possible selection algorithm is to always select the first address. VRRP advertisements are always sent using the primary IP address as the source of the IP packet. Virtual Router Master The VRRP router that is assuming the responsibility of forwarding packets sent to the IP address(es) associated with the virtual router, and answering ARP requests for these IP addresses. Note that if the IP address owner is available, then it will always become the Master. Reference: http:// www.ietf.org/rfc/rfc3768.txt

• Question 19:

  Which two statements about VTP is true? (Choose two.)

  A. Switch send VTP advertisement from trunk ports with multicast address.
  B. VTP advertisement contains VTP password
  C. https://www.CertBus.com/300-115.html
  D. https://www.CertBus.com/300-115.html
  A. Switch send VTP advertisement from trunk ports with multicast address.
  B. VTP advertisement contains VTP password

• Question 20:

  Which type of load balancing is most appropriate for an Etherchannel that passes traffic from multiple sources to a single end device?

  A. destination IP address forwarding
  B. source and destination IP address forwarding
  C. destination MAC address forwarding
  D. source MAC address forwarding
  D. source MAC address forwarding