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Exam Implementing Cisco IP Switched Networks (SWITCH v2.0)
Number 300-115
File Name Implementing Cisco IP Switched Networks (SWITCH v2-0).pass4sure.300-115.2019-10-29.1e.560q.vcex
Size 16.37 Mb
Posted October 29, 2019
Downloads 71
Download Implementing Cisco IP Switched Networks (SWITCH v2-0).pass4sure.300-115.2019-10-29.1e.560q.vcex

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Demo Questions

Question 1

What is the maximum number of switches that can be stacked using Cisco StackWise?

  • A: 4
  • B: 5
  • C: 8
  • D: 9
  • E: 10
  • F: 13

Correct Answer: D

Up to 9 Cisco Catalyst switches can be stacked together to build single logical StackWise switch since Cisco IOS XE Release 3.3.0SE. Prior to Cisco IOS XE Release3.3.0SE, up to 4 Cisco Catalyst switches could be stacked together.  
Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/qa_c67-722110.html




Question 2

A network engineer wants to add a new switch to an existing switch stack. Which configuration must be added to the new switch before it can be added to the switch stack?

  • A: No configuration must be added.
  • B: stack ID
  • C: IP address
  • D: VLAN information
  • E: VTP information

Correct Answer: A

Switch Stack Offline Configuration 
You can use the offline configuration feature to provision (to supply a configuration to) a new switch before it joins the switch stack. You can configure in advance the stack member number, the switch type, and the interfaces associated with a switch that is not currently part of the stack. The configuration that you create on the switch stack is called the provisioned configuration . The switch that is added to the switch stack and that receives this configuration is called the provisioned switch. 
You manually create the provisioned configuration through the switch stack-member-number provision type global configuration command. The provisioned configuration is automatically created when a switch is added to a switch stack and when no provisioned configuration exists. 
When you configure the interfaces associated with a provisioned switch (for example, as part of a VLAN), the switch stack accepts the configuration, and the information appears in the running configuration. The interface associated with the provisioned switch is not active, operates as if it is administratively shut down, and the no shutdown interface configuration command does not return it to active service. The interface associated with the provisioned switch does not appear in the display of the specific feature; for example, it does not appear in the show vlan user EXEC command output. 
The switch stack retains the provisioned configuration in the running configuration whether or not the provisioned switch is part of the stack. You can save the provisioned configuration to the startup configuration file by entering the copy running-config startup-config privileged EXEC command. The startup configuration file ensures that the switch stack can reload and can use the saved information whether or not the provisioned switch is part of the switch stack.  
Effects of Adding a Provisioned Switch to a Switch Stack 
When you add a provisioned switch to the switch stack, the stack applies either the provisioned configuration or the default configuration. Table 5-1 lists the events that occur when the switch stack compares the provisioned configuration with the provisioned switch. 

  

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swstack.html




Question 3

Refer to the exhibit. 

  

Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel?

  • A: switch1 
    channel-group 1 mode active  
    switch2 
    channel-group 1 mode auto
  • B: switch1 
    channel-group 1 mode desirable 
    switch2 
    channel-group 1 mode passive
  • C: switch1 
    channel-group 1 mode on 
    switch2 
    channel-group 1 mode auto
  • D: switch1 
    channel-group 1 mode desirable 
    switch2 
    channel-group 1 mode auto

Correct Answer: D

The different etherchannel modes are described in the table below:

  

Both the auto and desirable PAgP modes allow interfaces to negotiate with partner interfaces to determine if they can form an EtherChannel based on criteria such as interface speed and, for Layer 2 EtherChannels, trunking state and VLAN numbers. 
Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible. For example:
An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode.  
An interface in the auto mode can form an EtherChannel with another interface in the desirable mode. 
An interface in the auto mode cannot form an EtherChannel with another interface that is also in the auto mode because neither interface starts PAgP negotiation.  
An interface in the on mode that is added to a port channel is forced to have the same characteristics as the already existing on mode interfaces in the channel. 
Reference: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/20ew/configuration/guide/config/channel.html




Question 4

Refer to the exhibit. 

  

How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is received or transmitted in VLAN 10 on the GigabitEthernet0/1 port?

  • A: Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10.
  • B: Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10.
  • C: Apply the monitor session filter globally to allow only traffic from VLAN 10.
  • D: Change the monitor session source to VLAN 10 instead of the physical interface.

Correct Answer: C

To start a new flow-based SPAN (FSPAN) session or flow-based RSPAN (FRSPAN) source or destination session, or to limit (filter) SPAN source traffic to specific VLANs, use the monitor session filter global configuration command. 
Usage Guidelines 
You can set a combined maximum of two local SPAN sessions and RSPAN source sessions. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. 
You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. You select a series or range of VLANs by using the [ , | -] options. 
If you specify a series of VLANs, you must enter a space before and after the comma. If you specify a range of VLANs, you must enter a space before and after the hyphen ( -). 
VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports. By default, all VLANs are monitored on trunk source ports. You can use the monitor session session_number filter vlan vlan-id command to limit SPAN traffic on trunk source ports to only the specified VLANs. 
VLAN monitoring and VLAN filtering are mutually exclusive. If a VLAN is a source, VLAN filtering cannot be enabled. If VLAN filtering is configured, a VLAN cannot become a source. 
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/network_management/command_reference/b_nm_3se_3850_cr/b_nm_3se_3850_cr_chapter_010.html#wp3875419997




Question 5

Refer to the exhibit. 

  

A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three.)

  • A: A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination
  • B: A remote SPAN VLAN on the distribution and access layer switch
  • C: A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination
  • D: A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination
  • E: A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination
  • F: A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination

Correct Answer: BCD

You can analyze network traffic passing through ports or VLANs by using SPAN or RSPAN to send a copy of the traffic to another port on the switch or on another switch that has been connected to a network analyzer or other monitoring or security device. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. 
RSPAN supports source ports, source VLANs, and destination ports on different switches (or different switch stacks), enabling remote monitoring of multiple switches across your network. The traffic for each RSPAN session is carried over a user-specified RSPAN VLAN that is dedicated for that RSPAN session in all participating switches. The RSPAN traffic from the source ports or VLANs is copied into the RSPAN VLAN and forwarded over trunk ports carrying the RSPAN VLAN to a destination session monitoring the RSPAN VLAN. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. The destination is always a physical port. 
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swspan.html




Question 6

After an EtherChannel is configured between two Cisco switches, interface port channel 1 is in the down/down state. Switch A is configured with channel-group 1 mode active, while Switch B is configured with channel-group 1 mode desirable. Why is the EtherChannel bundle not working?

  • A: The switches are using mismatched EtherChannel negotiation modes.
  • B: The switch ports are not configured in trunking mode.
  • C: LACP priority must be configured on both switches.
  • D: The channel group identifier must be different for Switch A and Switch B.

Correct Answer: A

Here we have a situation where one switch is using active mode, which is an LACP mode, and the other is using desirable, which is a PAGP mode. You can not mix the LACP and PAGP protocols to form an etherchannel. Here is a summary of the various etherchannel modes:

  

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swethchl.html




Question 7

Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. This command is configured globally:
monitor session 2 filter vlan 1 – 8, 39, 52 
What is the result of the implemented command?

  • A: All VLAN traffic is sent to the SPAN destination interface.
  • B: Traffic from VLAN 4 is not sent to the SPAN destination interface.
  • C: Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs.
  • D: The trunk’s native VLAN must be changed to something other than VLAN 1.
  • E: Traffic from VLANs 1 to 8, 39, and 52 is replicated to the SPAN destination port.

Correct Answer: E

The “monitor session filter” command is used to specify which VLANS are to be port mirrored using SPAN. This example shows how to monitor VLANs 1 through 5 and VLAN 9 when the SPAN source is a trunk interface: 
Switch(config)# monitor session 2 filter vlan 1 – 5 , 9 
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/25ew/configuration/guide/conf/span.html/index.html#wp1066836




Question 8

After the implementation of several different types of switches from different vendors, a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible.  
Which vendor-neutral protocol could be used to resolve this issue?

  • A: Local Area Mobility
  • B: Link Layer Discovery Protocol
  • C: NetFlow
  • D: Directed Response Protocol

Correct Answer: B

The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity, capabilities, and neighbors on an IEEE 802 local area network, principally wired Ethernet. LLDP performs functions similar to several proprietary protocols, such as the Cisco Discovery Protocol (CDP). 
Reference: http://en.wikipedia.org/wiki/Link_Layer_Discovery_Protocol




Question 9

Several new switches have been added to the existing network as VTP clients. All of the new switches have been configured with the same VTP domain, password, and version. However, VLANs are not passing from the VTP server (existing network) to the VTP clients.  
What must be done to fix this?

  • A: Remove the VTP domain name from all switches with "null" and then replace it with the new domain name.
  • B: Configure a different native VLAN on all new switches that are configured as VTP clients.
  • C: Provision one of the new switches to be the VTP server and duplicate information from the existing network.
  • D: Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred.

Correct Answer: D

VTP allows switches to advertise VLAN information between other members of the same VTP domain. VTP allows a consistent view of the switched network across all switches. There are several reasons why the VLAN information can fail to be exchanged. 
Verify these items if switches that run VTP fail to exchange VLAN information:
VTP information only passes through a trunk port. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. 
Make sure that if EtherChannels are created between two switches, only Layer 2 EtherChannels propagate VLAN information. 
Make sure that the VLANs are active in all the devices. 
One of the switches must be the VTP server in a VTP domain. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. 
The VTP domain name must match and it is case sensitive. CISCO and cisco are two different domain names. 
Make sure that no password is set between the server and client. If any password is set, make sure that the password is the same on both sides. 
Reference: http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.shtml




Question 10

After implementing VTP, the extended VLANs are not being propagated to other VTP switches. What should be configured for extended VLANs?

  • A: VTP does not support extended VLANs and should be manually added to all switches.
  • B: Enable VTP version 3, which supports extended VLAN propagation.
  • C: VTP authentication is required when using extended VLANs because of their ability to cause network instability.
  • D: Ensure that all switches run the same Cisco IOS version. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use.

Correct Answer: B

  VTP version 1 and VTP version 2 do not propagate configuration information for extended-range VLANs (VLAN numbers 1006 to 4094). You must configure extended-range VLANs manually on each network device. 
  VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094). If you convert from VTP version 3 to VTP version 2, the VLANs in the range 1006 to 4094 are removed from VTP control. 
Reference: http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/15.1SY/config_guide/sup2T/vtp.pdf










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