chapter 5-6

Which spanning tree standard supports only one root bridge so that traffic from all VLANs flows over the same path

802.1D

What is a requirement to configure a trunking EtherChannel between two switches

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

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

It is Cisco proprietary

What are two requirements to be able to configure an EtherChannel between two switches

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

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

prevents Layer 2 loops

What are two load-balancing methods in the EtherChannel technology

source IP to destination IP source MAC to destination MAC

A switch is configured to run STP What term describes a field used to specify a VLAN ID

Extended system ID

Which three components are combined to form a bridge ID

Extended system ID, bridge priority, MAC address

In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network

Forwarding and learning

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

Lowest MAC address

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

MST In which two PVST+ port states are MAC addresses learned? Forwarding , Learning

A switch is configured to run STP What term describes the reference point for all path calculations

Root Bridge

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

Which port role is assigned to the switch port that has the lowest cost to reach the root bridge

Root port

Refer to the exhibit. Which switch will be the root bridge after the election process is complete

S2

What is STP, RSTP, MSTP, and Rapid PVST+

STP- Spanning tree protocol RSTP- Rapid Spanning tree protocol MSTP- Multiple Spanning Tree Protocol, Rapid per VLAN Spanning Tree

Which mode configuration setting would allow formation of an EtherChannel link between switches SW1 and SW2 without sending negotiation traffic

SW1: On SW2: 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 desirable

What are two advantages of EtherChannel

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

Which two parameters must match on the ports of two switches to create a PAgP EtherChannel between the switches

Speed VLAN information

Refer to the exhibit A network administrator is configuring an EtherChannel link between two switches, SW1 and SW2Which statement describes the effect after the commands are issued on SW1 and SW2

The EtherChannel fails to establish

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 functional

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

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 remain functional

What are two drawbacks to turning spanning tree off and having multiple paths through the Layer 2 switch network

The MAC address table becomes unstable Broadcast frames are transmitted indefinitely

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

28672

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

61440

Refer to the exhibit On the basis of the output that is shown, what can be determined about the EtherChannel bundle

A Cisco proprietary protocol was used to negotiate the EtherChannel link

Which statement describes an EtherChannel implementation

A trunked port can be part of an EtherChannel bundle

A switch is configured to run STPWhat 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

Refer to the exhibitA 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 SW2 EtherChannel mode to desirable

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

Designated Root

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

Desirable

Which two channel group modes would place an interface in a negotiating state using PAgP

Desirable Auto (Passive)

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

EtherChannel

What are two advantages of using LACP

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

What is the function of STP in a scalable network

It disables redundant paths to eliminate Layer 2 loops

What is a characteristic of spanning tree

It is enabled by default on Cisco switches

Which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link

LACP

What is the outcome of a Layer 2 broadcast storm

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

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

On

Which two network design features require Spanning Tree Protocol (STP) to ensure correct network operation

Redundant links between layer 2 switches Removing single points of failure with multiple layer 2 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

The Remaining two interfaces continue to load balance traffic Which statement describes a characteristic of EtherChannel? It is made by combining multiple physical links that are seen as one link between two switches

What is the value used to determine which port on a non-root bridge will become a root port in a STP network

The path cost

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

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