Set of flashcards CCNA 200-125 (Page 3 of 12)

Flashcards	478
Students	26
Language	English
Category	Computer Science
Level	Other
Created / Updated	20.02.2017 / 03.10.2024
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Which three statements about VTP features are true? (Select three)

VTP pruning is used to increase available bandwidth in trunk links.

VTP works at Layer 3 of the OSI model and requires that a management VLAN IP address be configured.

When properly configured, VTP minimizes VLAN misconfigurations and configuration inconsistencies.

When properly configured, VTP maintains VLAN configuration consistency and accelerates trunk link negotiation.

Client, server, and transparent are valid VTP modes.

Which method does a connected trunk port use to tag VLAN traffic?

IEEE 802.1Q

IEEE 802.1D

IEEE 802.1p

IEEE 802.1w

What is the function of the command "switchport trunk native vlan 999" on a Cisco Catalyst switch?

It creates a VLAN 999 interface.

It designates VLAN 999 for untagged traffic.

It blocks VLAN 999 traffic from passing on the trunk.

It designates VLAN 999 as the default for all unknown tagged traffic.

If the primary root bridge experiences a power loss, which switch takes over?

switch 0004.9A1A.C182

switch 00E0.F90B.6BE3

switch 00E0.F726.3DC6

switch 0040.0BC0.90C5

Which command enhances the 802.1D convergence time on ports that are connected to hosts?

spanning-tree portfast

spanning-tree cost 512

spanning-tree backbonefast

spanning-tree uplinkfast

If a host experiences intermittent issues that relate to congestion within a network while remaining connected, what could cause congestion on this LAN?

Half-duplex operation

Broadcast storms

Network segmentation

Multicasting

View the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? (Select three)

All interfaces that are shown are on shared media.

All ports will be in a state of discarding, learning, or forwarding.

This switch must be the root bridge for all VLANs on this switch.

All designated ports are in a forwarding state.

The bridge priority is lower than the default value for spanning tree.

What are three benefits of implementing VLANs? (Choose three)

Broadcast storms can be mitigated by increasing the number of broadcast domains, thus reducing their size.

A more efficient use of bandwidth can be achieved allowing many physical groups to use the same network infrastructure.

A higher level of network security can be reached by separating sensitive data traffic from other network traffic.

Broadcast storms can be mitigated by decreasing the number of broadcast domains, thus increasing their size.

A more efficient use of bandwidth can be achieved allowing many logical networks to use the same network infrastructure.

View the exhibit. The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem? (Select three)

Ensure that cables A and B are straight-through cables.

Ensure that switch has power.

Reset all cables.

Ensure that cable A is plugged into a trunk port.

Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.

In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

in an improperly implemented redundant topology

when a dual ring topology is in use

when upper-layer protocols require high reliability

during high traffic periods

after broken links are re-established

After you configure the Loopback0 interface, which command can you enter to verify the status of the interface and determine whether fast switching is enabled?

Router#show interface loopback 0

Router#show run

Router#show ip interface brief

Router#show ip interface loopback 0

Which command enables RSTP on a switch?

spanning-tree mode rapid-pvst

spanning-tree backbonefast

spanning-tree mode mst

spanning-tree uplinkfast

View the exhibit. Which switch provides the spanning-tree designated port role for the network segment that services the printers?

Switch1

Switch2

Switch3

Switch4

What is one benefit of PVST+?

PVST+ reduces the CPU cycles for all the switches in the network.

PVST+ allows the root switch location to be optimized per VLAN.

PVST+ supports Layer 3 load balancing without loops.

PVST+ automatically selects the root bridge location, to provide optimization.

Drag-n-drop. PC_1 is exchanging packets with the FTP server. Consider the packets as they leave RouterB interface Fa0/1 towards RouterA. Drag the correct frame and packet address to their place in the table.

Source MAC: 0000.0c89.3333, Destination MAC: 0000.0c93.9999

Source IP: 172.16.34.250, Destination IP: 172.16.21.7

Which three are valid modes for a switch port used as a VLAN trunk? (Select three)

Forwarding

Auto

Transparent

On

Desirable

If host Z needs to send data through router R1 to a storage server, which destination MAC address does host Z use to transmit packets?

the MAC address of the interface on R1 that connects to host Z.

the host Z MAC address.

the MAC address of the interface on R1 that connects to the storage server.

the MAC address of the storage server interface.

Which two of these statements regarding RSTP are correct? (Select two)

RSTP defines no new port states.

RSTP defines new port roles.

RSTP is compatible with the original IEEE 802.1D STP.

RSTP is a proprietary implementation of IEEE 802.1D STP.

RSTP cannot operate with PVST+.

View the exhibit. The network administrator is testing connectivity from the branch router to the newly installed application server. What is the most likely reason for the first ping having a success rate of only 60 percent?

There is a short delay while NAT translates the server IP address.

The branch router LAN interface should be upgraded to FastEthernet.

The branch router had to resolve the application server MAC address.

The network is likely to be congested, with the result that packets are being intermittently dropped.

A routing table lookup delayed forwarding on the first two ping packets.

Which statement about DTP is true?

It uses the native VLAN.

It sends data on VLAN 1.

It negotiates a trunk link after VTP has been configured.

It uses desirable mode by default.

Which two of these are characteristics of the 802.1Q protocol? (Select two)

It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.

It is a trunking protocol capable of carrying untagged frames.

It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topology changes.

It includes an 8-bit field which specifies the priority of a frame.

It modifies the 802.3 frame header and thus requires that the FCS be recomputed.

View the exhibit. If CDP is enabled on all devices and interfaces, which devices will appear in the output of a show cdp neighbors command issued from R2?

R3 and S2

R1, S1, S2, R3, and S3

R1 and R3

R2 and R3

R1, S1, S2, and R3

Refer to the exhibit. The network administrator cannot connect to Switch1 over a Telnet session, although the hosts attached to Switch1 can ping the interface Fa0/0 of the router. Given the information in the graphic and assuming that the router and Switch2 are configured properly, which of the following commands should be issued on Switch1 to correct this problem?

SW1(config)# interface fa0/1, SW1(configif)# ip address 192.168.24.3 255.255.255.0

SW1(config)# interface fa0/1, SW1(configif)# duplex full, SW1(configif)# speed 100

SW1(config)# ip default-gateway 192.168.24.1

SW1(config)# line con0, SW1(configline)# password cisco, SW1(configline)# login

SW1(config)# interface fa0/1, SW1(configif)# switchport mode trunk

View the exhibit. When HostA pings HostB, which entry will be in the ARP cache of HostA to support this transmission, after the ping?

Interface Address: 192.168.6.1, Physical Address: 0010.5a0c.feae, Type: dynamic

Interface Address: 192.168.4.7, Physical Address: 000f.2480.8916, Type: dynamic

Interface Address: 192.168.4.7, Physical Address: 0010.5a0c.feae, Type: dynamic

Interface Address: 192.168.6.1, Physical Address: 000f.2480.8916, Type: dynamic

Interface Address: 192.168.6.2, Physical Address: 0010.5a0c.feae, Type: dynamic

Which spanning-tree protocol rides on top of another spanning-tree protocol?

Mono Spanning Tree

RSTP

MSTP

PVST+

Which two spanning-tree port states does RSTP combine to allow faster convergence? (Choose two.)

learning

discarding

forwarding

listening

blocking

What set of commands was configured on interface Fa0/3 to produce the given output?

interface FastEthernet 0/3, channel-group 2 mode passive, switchport trunk encapsulation dot1q, switchport mode trunk

interface FastEthernet 0/3, channel-group 2 mode on, switchport trunk encapsulation dot1q, switchport mode trunk

interface FastEthernet 0/3, channel-group 2 mode active, switchport trunk encapsulation dot1q, switchport mode trunk

interface FastEthernet 0/3, channel-group 1 mode desirable, switchport trunk encapsulation dot1q, switchport mode trunk

What is the default VLAN on an access port?

10

1

1024

0

Which command can you enter to determine whether a switch is operating in trunking mode?

show interfaces

show ip interface brief

show vlan

show interface switchport

Refer to the exhibit. Which statement describes the effect of this configuration?

VLAN 10 is added to the VLAN database.

The VLAN 10 VTP configuration is displayed.

The VLAN 10 configuration is saved when the router exits VLAN configuration mode.

VLAN 10 spanning-tree output is displayed.

Which interface counter can you use to diagnose a duplex mismatch problem?

Giants

Runts

Late collisions

No carrier

Deferred

Drag-n-drop. PC_1 is sending packets to the FTP server. Consider the packets as they leave RouterA interface Fa0/0 towards RouterB. Drag the correct frame and packet address to their place in the table.

Source MAC: 0000.0c93.9999, Destination MAC: 0000.0c89.3333

Source IP: 172.16.21.7, Destination IP: 172.16.34.250

Which address type does a switch use to make selective forwarding decisions?

Destination MAC address

Destination IP address

Source MAC address

Source IP address

Source and Destination IP address

Which statement about unicast frame forwarding on a switch is true?

The source address is used to determine the switch port to which a frame is forwarded.

If the destination MAC address is unknown, the frame is flooded to every port that is configured in the same VLAN except on the port that it was received on.

The TCAM table stores destination MAC addresses.

The CAM table is used to determine whether traffic is permitted or denied on a switch.

View the exhibit. Why has this switch not been elected the root bridge for VLAN1?

It is running RSTP while the elected root bridge is running 802.1d spanning tree.

It has a higher bridge ID than the elected root bridge.

It has a higher MAC address than the elected root bridge.

It has more than one interface that is connected to the root network segment.

View the exhibit. The MAC address table is shown in its entirety. The Ethernet frame that is shown arrives at the switch. What two operations will the switch perform when it receives this frame? (Choose two)

The switch will not forward a frame with this destination MAC address.

The frame will be forwarded out of all active switch ports except for port fa0/0.

The MAC address of ffff.ffff.ffff will be added to the MAC address table.

The frame will be forwarded out of all the ports on the switch.

The MAC address of 0000.00aa.aaaa will be added to the MAC Address Table.

Which command can you enter to view the ports that are assigned to VLAN 20?

Switch#show vlan id 20

Switch#show ip interface vlan 20

Switch#show ip interface brief

Switch#show interface vlan 20

Which command sequence can you enter to create VLAN 20 and assign it to an interface on a switch?

Switch(config)#vlan 20, Switch(config)#Interface gig x/y, Switch(configif)# switchport access vlan 20

Switch(config)#Interface gig x/y, Switch(configif)# vlan 20, Switch(configvlan)# switchport access vlan 20

Switch(config)#vlan 20, Switch(config)#Interface vlan 20, Switch(configif)# switchport trunk allowed vlan 20

Switch(config)#vlan 20, Switch(config)#Interface vlan 20, Switch(configif)# switchport trunk native vlan 20

Switch(config)#vlan 20, Switch(config)#Interface vlan 20, Switch(configif)# switchport access vlan 20

What is the first 24 bits in a MAC address called?

NIC

OUI

VAI

BIA

Which switching method duplicates the first six bytes of a frame before making a switching decision?

Cut-through switching

Fragment-free switching

Store-and-forward switching

ASIC switching

CCNA 200-125

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