CCNA 5.0 (CCNA R&S) – Switched Networks Final Exam P1

CCNA 5.0 (CCNA R&S) – Switched Networks Final Exam P1

1

What term is used to describe a hierarchical model in which three layers are not needed?

three-tier model

collapsed core

distribution-access model

dual-core model

2

 

Where in the Cisco Borderless Architecture is the forwarding rate crucial?

at access layer only

at all layers

at core layer only

at distribution and core layers only

at distribution layer only

3

Which factor can limit the implementation of a converged network infrastructure?

QoS implementation

software-based phones

legacy equipment

point-to-point video traffic

4

When would a network designer be concerned with RUs?

when considering port density

when calculating maximum port speed

when determining the number of available line cards

when purchasing a specific number of switches for a network rack

 

CCNA 5.0 (CCNA R&S) – Switched Networks Final Exam P1

5

What is the PoE pass-through feature?

how the power is supplied for a stack of switches

how the switch supplies electrical power to all of the line cards that are connected to it

the capability of a wireless AP to supply electrical power to IP phones

the capability of powering the switch as well as any devices that are directly connected to the switch

6

When a fixed configuration switch is purchased for use on a new network infrastructure, which feature would be of most value if the network is characterized as having a large numbers of users but the users require little bandwidth?

PoE pass-through

wire speed

PoE

port density

7

Which switching method results in the lowest latency when forwarding frames?

fast forward

fragment free

store and forward

symmetric

8

Which impact does adding a Layer 2 switch have on a network?

an increase in the number of dropped frames

an increase in the size of the broadcast domain

an increase in the number of network collisions

an increase in the size of the collision domain

9

Using default settings, what is the next step in the switch boot sequence after the IOS loads from flash?

Perform the POST routine.

Search for a backup IOS in ROM.

Load the bootstrap program from ROM.

Load the running-config file from RAM.

Locate and load the startup-config file from NVRAM.

 

CCNA 5.0 (CCNA R&S) – Switched Networks Final Exam P1

10

An administrator needs management access to a switch from a remote offsite location. Which three configurations are required on the switch to allow the administrator to have remote access using either SSH or Telnet? (Choose three.)

default gateway

banner message

VLAN IP address

vty line password

encrypted passwords

console line password

11

What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch?

automatically detects duplex settings

automatically detects interface speed

automatically detects copper cable type

automatically assigns the first detected MAC address to an interface

12

Refer to the exhibit. Which two commands or groups of commands are needed to complete the switch configuration so that SSH can be used to telnet from host A to SW_1? (Choose two.)

SW_1(config)# username david password class

 

SW_1(config)# line vty 0 15

SW_1(config-line)# login

SW_1(config-line)# password cisco

 

SW_1(config)# line vty 0 15

SW_1(config-line)# login local

SW_1(config-line)# transport input ssh

 

SW_1(config)# login ssh

SW_1(config)# password class

 

SW_1(config)# login key rsa

SW_1(config)# password cisco

 

SW_1(config)# password encrypted cisco

13

 

Which attack allows the attacker to see all frames on a broadcast network by causing a switch to flood all incoming traffic?

LAN storm

VLAN hopping

STP manipulation

MAC table overflow

802.1q double tagging

14

Which two statements are true about VLAN implementation? (Choose two.)

The size of the collision domain is reduced.

The number of required switches in a network decreases.

VLANs logically group hosts, regardless of physical location.

The network load increases significantly because of added trunking information.

Devices in one VLAN do not hear the broadcasts from devices in another VLAN.

15

Refer to the exhibit. Two VLANs have been configured on the switch and PCs have been assigned. PCs in the Sales VLAN can ping all PCs in their own VLAN, but cannot ping the PCs in the HR VLAN. What are two explanations for this problem? (Choose two.)

All PCs are in one collision domain.

All PCs are in one broadcast domain.

A router is required for communication between VLANs.

The PCs are in separate broadcast domains.

The management VLAN has not been assigned an IP address.

16

Refer to the exhibit. What is the purpose of the configuration commands that are shown?

to activate port Fa0/10

to make the port a member of VLAN 30

to activate port security on port Fa0/10

to add VLAN 30 to the trunk that is connected to port Fa0/10

17

Which two commands should be implemented to return a Cisco 3560 trunk port to its default configuration? (Choose two.)

S1(config-if)# no switchport trunk allowed vlan

S1(config-if)# no switchport trunk native vlan

S1(config-if)# switchport mode dynamic desirable

S1(config-if)# switchport mode access

S1(config-if)# switchport access vlan 1

18

Which three pairs of trunking modes will establish a functional trunk link between two Cisco switches? (Choose three.)

dynamic desirable – dynamic desirable

dynamic auto – dynamic auto

dynamic desirable – dynamic auto

dynamic desirable – trunk

access – trunk

access – dynamic auto

19

Under which two occasions should an administrator disable DTP while managing a local area network? (Choose two.)

when connecting a Cisco switch to a non-Cisco switch

when a neighbor switch uses a DTP mode of dynamic auto

when a neighbor switch uses a DTP mode of dynamic desirable

on links that should not be trunking

on links that should dynamically attempt trunking

20

While analyzing log files, a network administrator notices reoccurring native VLAN mismatches. What is the effect of these reoccurring errors?

All traffic on the error-occurring trunk port is being misdirected or dropped.

The control and management traffic on the error-occurring trunk port is being misdirected or dropped.

All traffic on the error-occurring trunk port is being switched correctly regardless of the error.

Unexpected traffic on the error-occurring trunk port is being received.​

21

Refer to the exhibit. An attacker on PC-A sends a frame with two 802.1Q tags on it, one for VLAN 10 and another for VLAN 20. What will happen to this frame?

It will be dropped by ALS1 because it is invalid.

ALS1 will leave both tags on the frame and send it to ALS2, which will forward it to hosts on VLAN 10.

ALS1 will remove both tags and forward the rest of the frame across the trunk link, where ALS2 will forward the frame to hosts on VLAN 10.

ALS1 will remove the outer tag and send the rest of the frame across the trunk link, where ALS2 will forward the frame to hosts on VLAN 20.

22

Which two methods can be used to provide secure management access to a Cisco switch? (Choose two.)

Configure all switch ports to a new VLAN that is not VLAN 1.

Configure specific ports for management traffic on a specific VLAN.

Configure SSH for remote management.

Configure all unused ports to a “black hole.”

Configure the native VLAN to match the default VLAN.

23

What is the purpose of the Spanning Tree Protocol (STP)?

prevents Layer 2 loops

prevents routing loops on a router

creates smaller collision domains

creates smaller broadcast domains

allows Cisco devices to exchange routing table updates

24

A set of switches is being connected in a LAN topology. Which STP bridge priority value will make it least likely for the switch to be selected as the root?

4096

32768

61440

65535

25

What two STP features are incorporated into Rapid PVST+? (Choose two.)

UplinkFast

PortFast

BPDU guard

BPDU filter

BackboneFast

loop guard

26

Which statement is true regarding states of the IEEE 802.1D Spanning Tree Protocol?

Ports are manually configured to be in the forwarding state.

Ports listen and learn before going into the forwarding state.

Ports must be blocked before they can be placed in the disabled state.

It takes 15 seconds for a port to go from blocking to forwarding.

27

Refer to the exhibit. A network administrator is verifying the bridge ID and the status of this switch in the STP election. Which statement is correct based on the command output?

The bridge priority of Switch_2 has been lowered to a predefined value to become the root bridge.

The bridge priority of Switch_2 has been lowered to a predefined value to become the backup root bridge.

The STP instance on Switch_2 is failing due to no ports being blocked and all switches believing they are the root.

The STP instance on Switch_2 is using the default STP priority and the election is based on Switch_2 MAC address.

28

An STP instance has failed and frames are flooding the network. What action should be taken by the network administrator?

A response from the network administrator is not required because the TTL field will eventually stop the frames from flooding the network.

Spanning tree should be disabled ​for that STP instance until the problem is located.

Broadcast traffic should be investigated and eliminated from the network.

Redundant links should be physically removed until the STP instance is repaired.

29

When the show spanning-tree vlan 33 command is issued on a switch, three ports are shown in the forwarding state. In which two port roles could these interfaces function while in the forwarding state? (Choose two.)

disabled

designated

root

alternate

blocked

30

Refer to the exhibit. Which destination MAC address is used when frames are sent from the workstation to the default gateway?

MAC address of the forwarding router

MAC addresses of both the forwarding and standby routers

MAC address of the standby router

MAC address of the virtual router

P2