ccna2 mods 5-6

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

61440

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 switch ports have to be configured as access ports with each port having a VLAN assigned.​ The EtherChannel was not configured with the same allowed range of VLANs on each interface

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

Which statement is true regarding the use of PAgP to create EtherChannels? It requires full duplex. It is Cisco proprietary. It requires more physical links than LACP does. It increases the number of ports that are participating in spanning tree. It mandates that an even number of ports (2, 4, 6, etc.) be used for aggregation.

It is Cisco proprietary.

What is a characteristic of spanning tree? It is enabled by default on Cisco switches. It has a TTL mechanism that works at Layer 2. It prevents propagation of Layer 2 broadcast frames. It is used to discover information about an adjacent Cisco device.

It is enabled by default on Cisco switches.

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

It is made by combining multiple physical links that are seen as one link between two switches.

In which two PVST+ port states are MAC addresses learned? (Choose two.) forwarding disabled learning listening blocking

forwarding learning

A switch is configured to run STP. What term describes a field that has a default value of 32,768 and is the initial deciding factor when electing a root bridge? bridge priority BPDUs bridge ID extended system ID

bridge priority

A small company network has six interconnected Layer 2 switches. Currently all switches are using the default bridge priority value. Which value can be used to configure the bridge priority of one of the switches to ensure that it becomes the root bridge in this design? 1 28672 32768 34816 61440

28672

A switch is configured to run STP. What term describes the reference point for all path calculations? root bridge root port designated port alternate port

root bridge

A switch is configured to run STP. What term describes the reference point for all path calculations? root bridge root port designated port disabled

root bridge

Which spanning tree standard supports only one root bridge so that traffic from all VLANs flows over the same path? Rapid PVST 802.1D MST PVST+

802.1D

Refer to the exhibit. On the basis of the output that is shown, what can be determined about the EtherChannel bundle? The EtherChannel bundle is down. The EtherChannel bundle is operating at both Layer 2 and Layer 3. Two Gigabit Ethernet ports are used to form the EtherChannel. A Cisco proprietary protocol was used to negotiate the EtherChannel link.

A Cisco proprietary protocol was used to negotiate the EtherChannel link.

Which statement describes an EtherChannel implementation? EtherChannel operates only at Layer 2. PAgP cannot be used in conjunction with EtherChannel. A trunked port can be part of an EtherChannel bundle. EtherChannel can support up to a maximum of ten separate links.

A trunked port can be part of an EtherChannel bundle.

Refer to the exhibit. A network administrator is configuring an EtherChannel link between two switches, SW1 and SW2. However, the EtherChannel link fails to establish. What change in configuration would correct the problem? Configure SW1 EtherChannel mode to on. Configure SW2 EtherChannel mode to on. Configure SW2 EtherChannel mode to auto. Configure SW2 EtherChannel mode to desirable.

Configure SW2 EtherChannel mode to desirable.

What are two advantages of EtherChannel? (Choose two.) Configuring the EtherChannel interface provides consistency in the configuration of the physical links. Load balancing occurs between links configured as different EtherChannels. EtherChannel uses upgraded physical links to provide increased bandwidth. Spanning Tree Protocol views the physical links in an EtherChannel as one logical connection. Spanning Tree Protocol ensures redundancy by transitioning failed interfaces in an EtherChannel to a forwarding state.

Configuring the EtherChannel interface provides consistency in the configuration of the physical links. Spanning Tree Protocol views the physical links in an EtherChannel as one logical connection.

What are two advantages of using LACP? (Choose two.) LACP allows Fast Ethernet and Gigabit Ethernet interfaces to be mixed within a single EtherChannel. It eliminates the need for configuring trunk interfaces when deploying VLANs on multiple switches. It allows directly connected switches to negotiate an EtherChannel link. It provides a simulated environment for testing link aggregation. It decreases the amount of configuration that is needed on a switch. It allows the use of multivendor devices.

It allows directly connected switches to negotiate an EtherChannel link. It allows the use of multivendor devices.

What is the outcome of a Layer 2 broadcast storm? -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. -CSMA/CD will cause each host to continue transmitting frames. -ARP broadcast requests are returned to the transmitting host.

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

Refer to the exhibit. The administrator tried to create an EtherChannel between S1 and the other two switches via the commands that are shown, but was unsuccessful. What is the problem? 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 through the same EtherChannel link. Traffic cannot be sent to two different switches, but only to two different devices like an EtherChannel-enabled server and a switch.​

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

Refer to the exhibit. What are the possible port roles for ports A, B, C, and D in this RSTP-enabled network? alternate, root, designated, root designated, root, alternate, root alternate, designated, root, root designated, alternate, root, root

alternate, designated, root, root

A switch is configured to run STP. What term describes a non-root port that is permitted to forward traffic on the network? designated port alternate port disabled dedicated port

designated port

A switch is configured to run STP. What term describes a non-root port that is permitted to forward traffic on the network? designated port alternate port disabled root port

designated port

Refer to the exhibit. An administrator wants to form an EtherChannel between the two switches by using the Port Aggregation Protocol. If switch S1 is configured to be in auto mode, which mode should be configured on S2 to form the EtherChannel? on auto desirable off

desirable

Which two channel group modes would place an interface in a negotiating state using PAgP? (Choose two.) on desirable active auto passive

desirable auto

What is the function of STP in a scalable network? It decreases the size of the failure domain to contain the impact of failures. It protects the edge of the enterprise network from malicious activity. It disables redundant paths to eliminate Layer 2 loops. It combines multiple switch trunk links to act as one logical link for increased bandwidth.

t disables redundant paths to eliminate Layer 2 loops.

What is the value used to determine which port on a non-root bridge will become a root port in a STP network? the highest MAC address of all the ports in the switch the lowest MAC address of all the ports in the switch the VTP revision number the path cost

the path cost

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

-designated -root

In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose two.) -blocking -disabled -forwarding -learning -listening

-forwarding -learning

Which two network design features require Spanning Tree Protocol (STP) to ensure correct network operation? (Choose two.) -static default routes -implementing VLANs to contain broadcasts -redundant links between Layer 2 switches -link-state dynamic routing that provides redundant routes -removing single points of failure with multiple Layer 2 switches

-redundant links between Layer 2 switches -removing single points of failure with multiple Layer 2 switches

What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.) The interfaces that are involved need to be contiguous on the switch. All the interfaces need to work at the same speed. All the interfaces need to be working in the same duplex mode. All interfaces need to be assigned to different VLANs. Different allowed ranges of VLANs must exist on each end

All the interfaces need to work at the same speed. All the interfaces need to be working in the same duplex mode.

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? HSRP PortFast trunking EtherChannel

EtherChannel

Which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link? Multilink PPP DTP LACP PAgP

LACP

Which protocol provides up to 16 instances of RSTP, combines many VLANs with the same physical 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

MST

Refer to the exhibit. Which switch will be the root bridge after the election process is complete? S1 S2 S3 S4

S2

Which mode configuration setting would allow formation of an EtherChannel link between switches SW1 and SW2 without sending negotiation traffic? SW1: onSW2: on SW1: desirableSW2: desirable SW1: autoSW2: autotrunking enabled on both switches SW1: autoSW2: autoPortFast enabled on both switches SW1: passiveSW2: active

SW1: onSW2: on

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 auto . Which command must be used on SW2 to enable this EtherChannel? SW2(config-if-range)# channel-group 1 mode on SW2(config-if-range)# channel-group 1 mode active 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 desirable

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 suspended. The EtherChannel is not functional. The port aggregation protocol PAgP is misconfigured. FastEthernet ports Fa0/1, Fa0/2, and Fa0/3 do not join the EtherChannel

The EtherChannel is not functional.

A network administrator has configured an EtherChannel between two switches that are connected via four trunk links. If the physical interface for one of the trunk links changes to a down state, what happens to the EtherChannel? The EtherChannel will transition to a down state. Spanning Tree Protocol will recalculate the remaining trunk links. The EtherChannel will remain functional. Spanning Tree Protocol will transition the failed physical interface into forwarding mode.

The EtherChannel will remain functional.

What are two drawbacks to turning spanning tree off and having multiple paths through the Layer 2 switch network? (Choose two.) The switch acts like a hub. Port security becomes unstable. The MAC address table becomes unstable. Broadcast frames are transmitted indefinitely. Port security shuts down all of the ports that have attached devices.

The MAC address table becomes unstable. Broadcast frames are transmitted indefinitely.

What is a requirement to configure a trunking EtherChannel between two switches? The participating interfaces must be physically contiguous on a switch. The allowed range of VLANs must be the same on both switches. The participating interfaces must be on the same module on a switch. The participating interfaces must be assigned the same VLAN number on both switches.

The allowed range of VLANs must be the same on both switches.

A network administrator configured an EtherChannel link with three interfaces between two switches. What is the result if one of the three interfaces is down? he EtherChannel fails. The remaining two interfaces continue to load balance traffic. The remaining two interfaces become separate links between the two switches. One interface becomes an active link for data traffic and the other becomes a backup link.

The remaining two interfaces continue to load balance traffic.

Which three components are combined to form a bridge ID? -port ID -IP address -extended system ID -MAC address -bridge priority -cost

extended system ID MAC address bridge priority

A switch is configured to run STP. What term describes a field that has a default value of 32,768 and is the initial deciding factor when electing a root bridge? bridge priority MAC Address extended system ID bridge ID

bridge priority

A switch is configured to run STP. What term describes a field used to specify a VLAN ID? extended system ID port ID MAC Address bridge priority

extended system ID

A switch is configured to run STP. What term describes a field used to specify a VLAN ID? extended system ID port ID bridge priority bridge ID

extended system ID

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Which set of configuration commands issued on SW1 will successfully complete the EtherChannel link between SW1 and SW2? interface Port-channel 1no shutdown interface GigabitEthernet0/1channel-group 1 mode desirable interface GigabitEthernet0/1no shutdown interface GigabitEthernet0/2channel-group 2 mode desirable

interface GigabitEthernet0/1channel-group 1 mode desirable

If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge? -lowest IP address -lowest MAC address -highest IP address -highest MAC address

lowest MAC address

When EtherChannel is configured, which mode will force an interface into a port channel without exchanging aggregation protocol packets? active auto on desirable

on

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

prevents Layer 2 loops

A switch is configured to run STP. What term describes the switch port closest, in terms of overall cost, to the root bridge? root port designated port alternate port disabled

root port

A switch is configured to run STP. What term describes the switch port closest, in terms of overall cost, to the root bridge? root port designated port alternate port root bridge

root port

Which port role is assigned to the switch port that has the lowest cost to reach the root bridge? root port non-designated port designated port disabled port

root port

What are two load-balancing methods in the EtherChannel technology? (Choose two.) combination of source port and IP to destination port and IP source IP to destination IP source port to destination port combination of source MAC and IP to destination MAC and IP source MAC to destination MAC

source IP to destination IP source MAC to destination MAC

Which two parameters must match on the ports of two switches to create a PAgP EtherChannel between the switches? (Choose two.) MAC address speed VLAN information PAgP mode port ID

speed VLAN information