CCNA 2 v7 Modules 5 - 6: Redundant Networks Exam

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

VLAN ID

During the implementation of Spanning Tree Protocol, all switches are rebooted by the network administrator. What is the first step of the spanning-tree election process?

All the switches send out BPDUs advertising themselves as the root bridge.

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

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.)

Edge port, PortFast

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

Forwarding, learning

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

Lowest mac address

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

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

802.1D

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

Path cost

What are two drawbacks to turning spanning tree off and having multiple paths through the Layer 2 switch network? (Choose two.)

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

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

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

It allows directly connected switches to negotiate an EtherChannel link.

It allows the use of multivendor devices.

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

What are two advantages of EtherChannel? (Choose two.)

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.

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

In which two PVST+ port states are MAC addresses learned? (Choose two.)

learning, forwarding

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

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

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

Extended system id

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 a field that has a default value of 32,768 and is the initial deciding factor when electing a root bridge?

Bridge priority

Which statement describes an EtherChannel implementation?

A trunked port can be part of an EtherChannel bundle

What are two load-balancing methods in the EtherChannel technology? (Choose two.)

Source IP to Destination IP and source MAC to Destination MAC

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

What is the outcome of a Layer 2 broadcast storm?

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

Rapid PVST+

Proprietary per VLAN implementation of IEEE 802.1 w

PVST+

Cisco implementation of IEEE 802.1D

RSTP

Fast converging enhancement of IEEE 802.1D

MSTP

IEEE standard that reduces the number of STP instaces.

the legacy standard for STP that runs all VLANs in a single spanning-tree

STP

A protocol that allows multiple VLANs to run in a single spanning-tree instance.

MSTP

A cisco enhancement of RSTP to provide a spanning-tree instance for each VLAN.

Rapid PVST+