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Worksheets105 5-6 Review
Total questions: 21
Worksheet time: 21mins
What additional information is contained in the 12-bit extended system ID of a BPDU?
MAC Address
VLAN ID
IP Address
port 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?
Each switch with a lower root ID than its neighbor will not send BPDUs.
All the switches send out BPDUs advertising themselves as the root bridge.
Each switch determines the best path to forward traffic.
Each switch determines what port to block to prevent a loop from occurring.
Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?
designated port
root port
alternate
disabled 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.)
bridge ID
edge port
extended system ID
PortFast
PVST+
Which three components are combined to form a bridge ID?
extended system ID
IP address
MAC address
bridge priority
port ID
If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?
lowest MAC address
lowest IP address
highest IP address
highest MAC address
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 combines multiple switch trunk links to act as one logical link for increased bandwidth.
It 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 path cost
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
Refer to the exhibit. Which switch will be the root bridge after the election process is complete?
S1
S2
S3
S4
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.
The switch acts like a hub.
Port security becomes unstable.
Broadcast frames are transmitted indefinitely.
Port security shuts down all of the ports that have attached devices.
Which statement is true regarding the use of PAgP to create EtherChannels?
It requires full duplex.
It increases the number of ports that are participating in spanning tree.
It requires more physical links than LACP does.
It is Cisco proprietary.
What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.)
All the interfaces need to work at the same speed.
All interfaces need to be assigned to different VLANs.
Different allowed ranges of VLANs must exist on each end.
All the interfaces need to be working in the same duplex mode.
The interfaces that are involved need to be contiguous on the switch.
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.
Two Gigabit Ethernet ports are used to form the EtherChannel.
A Cisco proprietary protocol was used to negotiate the EtherChannel link.
The EtherChannel bundle is operating at both Layer 2 and Layer 3.
Which two parameters must match on the ports of two switches to create a PAgP EtherChannel between the switches? (Choose two.)
port ID
PAgP mode
MAC address
speed
VLAN information
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.
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 EtherChannel fails.
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 passive
SW2(config-if-range)# channel-group 1 mode desirable
SW2(config-if-range)# channel-group 1 mode on
SW2(config-if-range)# channel-group 1 mode active
Which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link?
PAgP
LACP
Multilink PPP
DTP
What is a requirement to configure a trunking EtherChannel between two switches?
The allowed range of VLANs must be the same on both switches.
The participating interfaces must be assigned the same VLAN number on both switches.
The participating interfaces must be physically contiguous on a switch.
The participating interfaces must be on the same module on a switch.
What are two advantages of using LACP? (Choose two.)
It allows directly connected switches to negotiate an EtherChannel link.
It eliminates the need for configuring trunk interfaces when deploying VLANs on multiple switches.
It decreases the amount of configuration that is needed on a switch.
It provides a simulated environment for testing link aggregation.
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?
root port
designated port
alternate port
disabled
Refer to the exhibit. What are the possible port roles for ports A, B, C, and D in this RSTP-enabled network?
alternate, designated, root, root
designated, alternate, root, root
alternate, root, designated, root
designated, root, alternate, root
