Download CCNP Cisco IP Switched Networks (SWITCH v2-0).braindumps.300-115.2019-02-10.1e.482q.vcex

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Exam Implementing Cisco IP Switched Networks (SWITCH v2.0)
Number 300-115
File Name CCNP Cisco IP Switched Networks (SWITCH v2-0).braindumps.300-115.2019-02-10.1e.482q.vcex
Size 13.78 Mb
Posted February 10, 2019
Downloads 132
Download CCNP Cisco IP Switched Networks (SWITCH v2-0).braindumps.300-115.2019-02-10.1e.482q.vcex

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Demo Questions

Question 1

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 2

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 3

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 4

A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided. The engineer notices only a single neighbor that uses Cisco Discovery Protocol, but it has several routing neighbor relationships.  
What would cause the output to show only the single neighbor?

  • A: The routers are connected via a Layer 2 switch.
  • B: IP routing is disabled on neighboring devices.
  • C: Cisco Express Forwarding is enabled locally.
  • D: Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices.

Correct Answer: A

If all of the routers are connected to each other using a layer 2 switch, then each router will only have the single switch port that it connects to as its neighbor. Even though multiple routing neighbors can be formed over a layer 2 network, only the physical port that it connects to will be seen as a CDP neighbor. CDP can be used to determine the physical topology, but not necessarily the logical topology.




Question 5

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 6

Refer to the exhibit. 

  

Switch A, B, and C are trunked together and have been properly configured for VTP. Switch C receives VLAN information from the VTP server Switch A, but Switch B does not receive any VLAN information. What is the most probable cause of this behavior?

  • A: Switch B is configured in transparent mode.
  • B: Switch B is configured with an access port to Switch A, while Switch C is configured with a trunk port to Switch B.
  • C: The VTP revision number of the Switch B is higher than that of Switch A.
  • D: The trunk between Switch A and Switch B is misconfigured.

Correct Answer: A

VTP transparent switches do not participate in VTP. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements, but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. 
Reference: http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52.shtml




Question 7

Refer to the exhibit. 

  

Switch A, B, and C are trunked together and have been properly configured for VTP. Switch B has all VLANs, but Switch C is not receiving traffic from certain VLANs. What would cause this issue?

  • A: A VTP authentication mismatch occurred between Switch A and Switch B.
  • B: The VTP revision number of Switch B is higher than that of Switch A.
  • C: VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C.
  • D: The trunk between Switch A and Switch B is misconfigured.

Correct Answer: C

VTP pruning increases network available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to reach the destination devices. Without VTP pruning, a switch floods broadcast, multicast, and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them. VTP pruning is disabled by default.  
VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruning-eligible list. The best explanation for why switch C is not seeing traffic from only some of the VLANs, is that VTP pruning has been configured.




Question 8

After the recent upgrade of the switching infrastructure, the network engineer notices that the port roles that were once “blocking” are now defined as “alternate” and “backup.” What is the reason for this change?

  • A: The new switches are using RSTP instead of legacy IEEE 802.1D STP.
  • B: IEEE 802.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches.
  • C: The administrator has defined the switch as the root in the STP domain.
  • D: The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches.

Correct Answer: A

RSTP works by adding an alternative port and a backup port compared to STP. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge. 
RSTP bridge port roles:
Root port – A forwarding port that is the closest to the root bridge in terms of path cost 
Designated port – A forwarding port for every LAN segment 
Alternate port – A best alternate path to the root bridge. This path is different than using the root port. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. 
Backup port – A backup/redundant path to a segment where another bridge port already connects. The backup port applies only when a single switch has two links to the same segment (collision domain). To have two links to the same collision domain, the switch must be attached to a hub. 
Disabled port – Not strictly part of STP, a network administrator can manually disable a port 
Reference: http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146.html




Question 9

An administrator recently configured all ports for rapid transition using PortFast. After testing, it has been determined that several ports are not transitioning as they should.  
What is the reason for this?

  • A: RSTP has been enabled per interface and not globally.
  • B: The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode.
  • C: STP is unable to achieve rapid transition for trunk links.
  • D: The switch does not have the processing power to ensure rapid transition for all ports.

Correct Answer: C

RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to-point links, not on trunk links. The link type is automatically derived from the duplex mode of a port. A port that operates in full-duplex is assumed to be point-to-point, while a half-duplex port is considered as a shared port by default. This automatic link type setting can be overridden by explicit configuration. In switched networks today, most links operate in full-duplex mode and are treated as point-to-point links by RSTP. This makes them candidates for rapid transition to the forwarding state. 
Reference: http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146.html




Question 10

Which technique automatically limits VLAN traffic to only the switches that require it?

  • A: access lists
  • B: DTP in nonegotiate
  • C: VTP pruning
  • D: PBR

Correct Answer: C

VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic, such as broadcast, multicast, unknown, and flooded unicast packets to only the switches that require it. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. By default, VTP pruning is disabled. 
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/vtp.html#wp1020444










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