CCNA 3 Scaling Networks Chapter 1 v5.02Exam Answers 2015

1 What are two benefits of extending access layer connectivity to users through a wireless medium? (Choose two.)

increased network management options

reduced costs*

increased flexibility*

increased bandwidth availability

decreased number of critical points of failure

2 A network engineer is reviewing a network design that uses a fixed configuration enterpriserouter that supports both LAN and WAN connections. However, the engineer realizes that the router does not have enough interfaces to support growth and network expansion. Which type of device should be used as a replacement?

a PoE device

another fixed configuration router

a modular router*

a Layer 3 switch

3 What are two functions of a router? (Choose two.)

It controls the flow of data via the use of Layer 2 addresses.

It increases the size of the broadcast domain.

It manages the VLAN database.

It determines the best path to send packets.*

It connects multiple IP networks.*

4 Which design feature will limit the size of a failure domain in an enterprise network?

the purchase of enterprise equipment that is designed for large traffic volume

the installation of redundant power supplies

the use of the building switch block approach*

the use of a collapsed core design

5 How can an enterprise network be designed to optimize bandwidth?

by installing devices with failover capabilities

by deploying a collapsed core model

by organizing the network to control traffic patterns*

by limiting the size of failure domains

6 As the network administrator you have been asked to implement EtherChannel on the corporate network. What does this configuration consist of?

grouping multiple physical ports to increase bandwidth between two switches*

providing redundant links that dynamically block or forward traffic

grouping two devices to share a virtual IP address

providing redundant devices to allow traffic to flow in the event of device failure

7 Which technology is required when switched networks are designed to include redundant links?

Spanning Tree Protocol*

virtual LANs

link aggregation

virtual private networks

8 Which statement describes a characteristic of Cisco Catalyst 2960 switches?

New Cisco Catalyst 2960-C switches support PoE pass-through.*

They are best used as distribution layer switches.

They do not support an active switched virtual interface (SVI) with IOS versions prior to 15.x.

They are modular switches.

9

Refer to the exhibit. Which devices exist in the failure domain when switch S3 loses power?

PC_3 and PC_2

AP_2 and AP_1

S4 and PC_2

PC_3 and AP_2*

S1 and S4

10 Immediately after a router completes its boot sequence, the network administrator wants tocheck the routers configuration. From privileged EXEC mode, which of the following commands can the administrator use for this purpose? (Choose two.)

show flash

show startup-config*

show NVRAM

show version

show running-config*

11 A network administrator is planning redundant devices and cabling in a switched network to support high availability. Which benefit will implementing the Spanning Tree Protocol provide to this design?

Redundant paths can be available without causing logical Layer 2 loops.*

Multiple physical interfaces can be combined into a single EtherChannel interface.

Faster convergence is available for advanced routing protocols.

Network access can be expanded to support both wired and wireless devices.

12 Which two requirements must always be met to use in-band management to configure a network device? (Choose two.)

at least one network interface that is connected and operational*

a terminal emulation client

a direct connection to the console port

a direct connection to the auxiliary port

Telnet, SSH, or HTTP access to the device*

13

Place the options in the following order:

connectivity

– not scored –

identification

access remote networks

security

14 In which situation would a network administrator install a Cisco Nexus Series or Cisco Catalyst 6500 Series switch to promote infrastructure scalability?

on a service provider network to promote integrated security, and simplified management

on a data center network to provide expansion and transport flexibility*

to enable virtual stacking of switches to provide cloud-managed access

on a campus LAN network as access layer switches

15 Which statement describes a characteristic of Cisco Meraki switches?

They are service provider switches that aggregate traffic at the edge of the network.

They are cloud-managed access switches that enable virtual stacking of switches.*

They are campus LAN switches that perform the same functions as Cisco 2960 switches.

They promote infrastructure scalability, operational continuity, and transport flexibility.16 Why would a network administrator issue the show cdp neigbors command on a router?

to display router ID and other information about OSPF neighbors

to display device ID and other information about directly connected Cisco devices*

to display routing table and other information about directly connected Cisco devices

to display line status and other information about directly connected Cisco devices

17. What is a characteristic of in-band device management?

It is used to monitor and make configuration changes to a network device over a network connection.*

It uses a direct connection to a console or AUX port.

It is used for initial configuration or when a network connection is unavailable.

It uses a terminal emulation client.

18. Which two features of enterprise class equipment assists an enterprise network in maintaining 99.999 percent up-time? (Choose two.)

failure domains

services module

collapsed core

redundant power supplies*

failover capabilities*

NEW QUESTIONS

19. What term is used to express the thickness or height of a switch?

domain sizerack unit*port densitymodule size

20. What is the function of ASICs in a multilayer switch?

They streamline forwarding of IP packets in a multilayer switch by bypassing the CPU.*They aggregate multiple physical switch ports into a single logical port.They prevent Layer 2 loops by disabling redundant links between switches.They provide power to devices such as IP phones and wireless access points through Ethernet ports.

21. What network design would contain the scope of disruptions on a network should a failure occur?

the configuration of all access layer devices to share a single gatewaythe installation of only enterprise class equipment throughout the networkthe deployment of distribution layer switches in pairs and the division of access layer switch connections between them*the reduction in the number of redundant devices and connections in the network core

22. In the Cisco Enterprise Architecture, which two functional parts of the network are combined to form a collapsed core design? (Choose two.)

distribution layer*enterprise edgeprovider edgecore layer*access layer

23. What is the function of PoE pass-through?

allows switches, phones, and wireless access points to receive power over existing Ethernet cables from an upstream switch*

allows multiple physical switch ports to be aggregated together and act as a single logical link to increase bandwidth on trunk links

allows a switch to disable redundant Layer 2 paths in the topology to prevent Layer 2 loops

allows a multilayer switch to forward IP packets at a rate close to that of Layer 2 switching by bypassing the CPU

24. What are two ways to access a Cisco switch for out-of-band management? (Choose two.)

a connection that uses the AUX port*

a connection that uses HTTP

a connection that uses the console port*

a connection that uses Telnet

a connection that uses SSH

CCNA 3 Scaling Networks Chapter 2 v5.02 Exam Answers 2015

1 Which protocol provides up to 16 instances of RSTP, combines many VLANs with the samephysical and logical topology into a common RSTP instance, and provides support for PortFast, BPDU guard, BPDU filter, root guard, and loop guard?

STP

Rapid PVST+

PVST+

MST*

2 Which two types of spanning tree protocols can cause suboptimal traffic flows because theyassume only one spanning-tree instance for the entire bridged network? (Choose two.)

STP*

RSTP*

MSTP

Rapid PVST+

PVST+

3

Refer to the exhibit. Which protocol information is being displayed in the output?

HSRP

VRRP

GLBP*

FHRP

4 A network administrator is preparing the implementation of Rapid PVST+ on a productionnetwork. How are the Rapid PVST+ link types determined on the switch interfaces?

Link types can only be configured on access ports configured with a single VLAN.

Link types must be configured with specific port configuration commands.

Link types are determined automatically.*

Link types can only be determined if PortFast has been configured.

5 Which RSTP ports are connected to end devices?

root ports

designated ports

trunk ports

edge ports*

6 If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?

highest IP address

lowest MAC address*

lowest IP address

highest MAC address

7 Which port state will switch ports immediately transition to when configured for PortFast?

learning

blocking

forwarding*

listening

8 To obtain an overview of the spanning tree status of a switched network, a network engineer issues the show spanning-tree command on a switch. Which two items of information will this command display? (Choose two.)

The role of the ports in all VLANs.*

The IP address of the management VLAN interface.

The number of broadcasts received on each root port.

The status of native VLAN ports.

The root bridge BID.*

9

Launch PT Hide and Save PTOpen the PT Activity. Perform the tasks in the activity instructions and then answer the question.Which switch is the root bridge?

Switch_1

Switch_2

Switch_4*

Switch_3

10 Fill in the blank. Do not use abbreviations.The spanning-tree ” mode rapid-pvst ” global configuration command is used to enable Rapid PVST+.

11 Which STP priority configuration would ensure that a switch would always be the root switch?

spanning-tree vlan 10 root primary

spanning-tree vlan 10 priority 4096

spanning-tree vlan 10 priority 0*

spanning-tree vlan 10 priority 61440

12 Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs?

VRRPv2*

SLB

GLBP

HSRP

13 Fill in the blank.In FHRP operation, two or more routers are represented as a single ” virtual ” router.

14 Which three components are combined to form a bridge ID?

extended system ID*

MAC address*

port ID

IP address

cost

bridge priority*

15 What is a characteristic of a Layer 2 loop?

A switch is continually forwarding the same unicast frame.

Broadcast frames are forwarded back to the sending switch.*

Routers continually forward packets to other routers.

The Time-to-Live attribute of a frame is set to infinity.

16 Which two network design features require Spanning Tree Protocol (STP) to ensure correctnetwork operation? (Choose two.)

redundant links between Layer 2 switches*

removing single points of failure with multiple Layer 2 switches*

link-state dynamic routing that provides redundant routes

static default routes

implementing VLANs to contain broadcasts

17 What additional information is contained in the 12-bit extended system ID of a BPDU?

MAC address

VLAN ID*

port ID

IP address

18 What is an advantage of PVST+?

PVST+ optimizes performance on the network through load sharing.*

PVST+ requires fewer CPU cycles for all the switches in the network.

PVST+ reduces bandwidth consumption compared to traditional implementations of STP that use CST.

PVST+ optimizes performance on the network through autoselection of the root bridge.

19 What is the purpose of HSRP?

It prevents malicious hosts from connecting to trunk ports.

It enables an access port to immediately transition to the forwarding state.

It prevents a rogue switch from becoming the STP root.

It provides a continuous network connection when a router fails.*

20 In which two port states does a switch learn MAC addresses and process BPDUs in a PVSTnetwork? (Choose two.)

listening

learning*

forwarding*

disabled

blocking

21

Place the options in the following order: Step 4 – not scored – Step 3 Step 1 Step 2

22

Refer to the exhibit. A network engineer is troubleshooting host connectivity on a LAN that

uses a first hop redundancy protocol. Which IPv4 gateway address should be configured onthe host?

192.168.2.0

192.168.2.1

192.168.2.2

192.168.2.100*

23 What is the outcome of a Layer 2 broadcast storm?

CSMA/CD will cause each host to continue transmitting frames.

ARP broadcast requests are returned to the transmitting host.

Routers will take over the forwarding of frames as switches become congested.

New traffic is discarded by the switch because it is unable to be processed.*

24. Which Cisco switch feature ensures that configured switch edge ports do not cause Layer 2 loops if a port is mistakenly connected to another switch?

PortFast

extended system ID

BPDU guard*

PVST+

25. What value determines the root bridge when all switches connected by trunk links have default STP configurations?

MAC address*

VLAN ID

extended system ID

bridge priority

26. Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?

root port*

disabled port

alternate

designated port

27. What could be the effect of duplicate unicast frames arriving at a destination device dueto multiple active alternative physical paths?

The number of collision domains increases.

Frame collisions increase.

The number of broadcast domains increases.

Application protocols malfunction.*

28. Refer to the exhibit. A network administrator configured routers R1 and R2 as part of HSRP group 1. After the routers have been reloaded, a user on Host1 complained of lack of connectivity to the Internet The network administrator issued the show standby brief command on both routers to verify the HSRP operations. In addition, the administrator observed the ARP table on Host1. Which entry should be seen in the ARP table on Host1 in order to gain connectivity to the Internet?

the virtual IP address of the HSRP group 1 and the MAC address of R1

the IP address and the MAC address of R1

the virtual IP address of the HSRP group 1 and the MAC address of R2

the virtual IP address and the virtual MAC address for the HSRP group 1*

29. Refer to the exhibit. Which trunk link will not forward any traffic after the root bridge election process is complete?Trunk1Trunk2*

Trunk3Trunk4

30. Fill in the blank. Use a number.The default hello timer value for STP BPDU frames is ___2__ seconds.

31. Fill in the blank. Do not abbreviate.To enable Rapid PVST+ on a Cisco switch, the spanning-tree mode __rapid-pvst__ global configuration mode command is required

32. Which is the default STP operation mode on Cisco Catalyst switches?

PVST+*

MSTP

MST

RSTP

Rapid PVST+

33. Which two concepts relate to a switch port that is intended to have only end devices attached and intended never to be used to connect to another switch? (Choose two.)

PortFast*

extended system ID

bridge ID

edge port*

PVST+

34. Which two concepts relate to a switch port that is intended to have only end devices andnever to be used to connect to another switch? (choose two)bridge IDextended system IDedge port*PortFast*PVST+

35. Place the options in the following order:

Cisco implementation of IEEE 802.1D ======> PVST+

Fast converging enhancement of IEEE 802.1D ======> RSTP

IEEE standard that reduces the number of STP instances ======+> MSTP

– not scored – =================> MST

Proprietary per VLAN implementation of IEEE 802.1w =====> Rapid PVST+

CCNA 3 Scaling Networks Chapter 3 v5.02 Exam Answers 2015

1 When a range of ports is being configured for EtherChannel, which mode will configure LACP so that it initiates the EtherChannel negotiation?

desirable

auto

active*

passive

2

Place the options in the following order:

This command shows information about the status of the port involved in the Etherchannel.

– not scored –

This command shows information about the reliability of the port-channel.

This command is used to check what port channels are configured on a switch.

This command shows the list of ports involved in the port channel and the time since the ports were bundled.3 What is an advantage of using LACP?

decreases the chance of a spanning-tree loop

provides a simulated environment for testing link aggregation

allows automatic formation of EtherChannel links*

decreases the amount of configuration that is needed on a switch for EtherChannel

increases redundancy to Layer 3 devices

4 Which command will initiate EtherChannel interface configuration mode?

interface port-channel interface-identifier*

interface interface-identifier

interface range interface-identifier

channel-group group-identifier

5

Launch PT Hide and Save PTOpen the PT Activity. Perform the tasks in the activity instructions and then answer the question.What are two reasons why the ping messages that are issued from Laptop0 towards Laptop1 are failing? (Choose two.)

The wrong cable types are connecting the two switches.

The channel group mode is not set correctly on the switches.

The interface VLAN 1 is shut down on both switches.

The channel group should be configured as a trunk on each switch.*

The two interfaces on each of the switches belong to different VLANs.*

6 Which three options must match in order to establish an EtherChannel between two directly connected switches? (Choose three.)

speed of the interfaces that are used for EtherChannel*

port numbers that are used for the EtherChannel

VLAN memberships of the interfaces that are used for EtherChannel*

duplex settings of the interfaces that are used for EtherChannel*

port security settings on the interfaces that used for EtherChannel

domain names on the switches

7

Refer to the exhibit. Which switching technology would allow each access layer switch link to be aggregated to provide more bandwidth between each Layer 2 switch and the Layer 3 switch?

trunking

EtherChannel*

HSRP

PortFast

8 Which statement is true regarding the use of PAgP to create EtherChannels?

It requires more physical links than LACP does.

It mandates that an even number of ports (2, 4, 6, etc.) be used for aggregation.

It is Cisco proprietary.*

It increases the number of ports that are participating in spanning tree.

It requires full duplex.

9 Which PAgP mode combination will establish an EtherChannel?

switch 1 set to desirable; switch 2 set to desirable.*

switch 1 set to on; switch 2 set to desirable.

switch 1 set to auto; switch 2 set to auto.

switch 1 set to auto; switch 2 set to on.

10 What is a best practice to use before beginning an EtherChannel implementation?

Shut down each of the affected interfaces.*

Assign affected interfaces to VLAN 1.

Assign affected interfaces to the management VLAN.

Enable each of the affected interfaces.

Assign affected interfaces to an unused VLAN.

11 Which two protocols are link aggregation protocols? (Choose two.)

STP

802.3ad*

EtherChannel

RSTP

PAgP*

12

Refer to the exhibit. A network administrator has decided that an EtherChannel between ports 0/1 and 0/2 on switches S1 and S2 would help performance. After making the configuration, the administrator notices no performance gain. Based on the output that is shown, what two possible assumptions could a network administrator make? (Choose two.)

The EtherChannel bundle is working.

One of the ports on S2 was not configured correctly.*

Switch S2 must be configured so that the maximum number of port channels is increased.

LACP and PAgP were both used to form the EtherChannel.

Switch S2 did not use a compatible EtherChannel mode.

The EtherChannel bundle is not working.*

13 Which statement describes an EtherChannel implementation?

EtherChannel can connect up to a maximum of eight separate links.

EtherChannel operates only at Layer 2.

PAgP cannot be used in conjunction with EtherChannel.

A trunked port can be part of an EtherChannel bundle.*

14 When a range of ports is being configured for EtherChannel by the use of PAgP, which

mode will form the bundled channel only if the port receives PAgP packets from another device?

active

desirable

auto*

passive

15 As the network administrator you have been asked to implement EtherChannel on the corporate network. What does this configuration consist of?

grouping multiple physical ports to increase bandwidth between two switches*

grouping two devices to share a virtual IP address

providing redundant devices to allow traffic to flow in the event of device failure

providing redundant links that dynamically block or forward traffic

16

Refer to the exhibit. The administrator tried to create an EtherChannel between S1 and theother two switches via the commands that are shown, but was unsuccessful. What is the problem?

Traffic cannot be sent to two different switches through the same EtherChannel link.*

Traffic can only be sent to two different switches if EtherChannel is implemented on Gigabit Ethernet interfaces.

Traffic can only be sent to two different switches if EtherChannel is implemented on Layer 3 switches.

Traffic cannot be sent to two different switches, but only to two different devices like an EtherChannel-enabled server and a switch.

17 An EtherChannel link using LACP was formed between two switches, S1 and S2. While verifying the configuration, which mode combination could be utilized on both switches?

S1-on and S2-active

S1-passive and S2-active*

S1-passive and S2-passive

S1-on and S2-passive

18 What is the most cost-effective method of solving interface congestion that is caused by a high level of traffic between two switches?

aggregate ports by using EtherChannel*

insert a router between the switches

increase uplink speed

add more VLANs to reduce broadcast domains

19

Refer to the exhibit. An EtherChannel was configured between switches S1 and S2, but the interfaces do not form an EtherChannel. What is the problem?

The interface port-channel number has to be different on each switch.

The switch ports were not configured with speed and duplex mode.

The EtherChannel was not configured with the same allowed range of VLANs on each interface.*

The switch ports have to be configured as access ports with each port having a VLAN assigned.

20 Which two load balancing methods can be implemented with EtherChannel technology? (Choose two.)

destination IP to source IP

destination MAC to destination IP

source IP to destination IP*

source MAC to destination MAC*

destination IP to destination MAC

destination MAC to source MAC

21. The trunk link between two 2960 switches has reached its capacity. How can this be addressed in the most economical way?

Decrease the size of the inter-switch collision domain by configuring additional VLANs.Combine physical ports into a high-speed logical link by configuring EtherChannel.*Create additional broadcast domains by inserting a router between the switches.Increase the speed of the ports.

22. A network administrator is configuring an EtherChannel link between switches SW1 and SW2 by using the command SW1(config-if-range)# channel-group 1 mode passive. Which command must be used on SW2 to enable this EtherChannel?

SW2(config-if-range)# channel-group 1 mode passive

SW2(config-if-range)# channel-group 1 mode desirable

SW2(config-if-range)# channel-group 1 mode active*

SW2(config-if-range)# channel-group 1 mode auto

23. Which statement describes a characteristic of EtherChannel?

It consists of multiple parallel links between a switch and a router.It can combine up to a maximum of 4 physical links.It is made by combining multiple physical links that are seen as one link between two switches.*It can bundle mixed types of 100 Mb/s and 1Gb/s Ethernet links.

24.

Refer to the exhibit. A network administrator issued the show etherchannel summary command on the switch S1. What conclusion can be drawn?

The etherchannel is not funtional.*The etherchannel is suspended.The port aggregation protocol PAgP is misconfigured.FastEthernet ports FA0/1, FA0/2, and FA0/3 do not join the EtherChannel.

25. What are two advantages of using LACP? (Choose two.)

provides a simulated environment for testing link aggregationallows use of multivendor devices*decreases the amount of configuration that is needed on a switch for EtherChannel

increases redundancy to Layer 3 deviceseliminates the need for the spanning-tree protocolallows automatic formation of EtherChannel links*

26. Which three settings must match in order for switch ports to form an EtherChannel? (Choose three.)

Port security settings on the connected physical interfaces must be configured to the same violation mode.The SNMP community strings must be configured the same.Non-trunk ports must belong to the same VLAN*The duplex settings of the switch ports on both sides of the physical link must match.The interfaces must be configured to the same speed.*The switch port numbers that will be combined to form the EtherChannel must match.