SWR 5-6 review
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.
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
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
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.
In which two PVST+ port states are MAC addresses learned? (Choose two.) forwarding disabled learning listening blocking
forwarding learning
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 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
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
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
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.
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 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.
It disables redundant paths to eliminate Layer 2 loops.
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.
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
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.
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
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? The 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.
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
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
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
Which two channel group modes would place an interface in a negotiating state using PAgP? (Choose two.) on desirable active auto passive
desirable auto
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
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
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
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
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
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 switch port closest, in terms of overall cost, to the root bridge? root port designated port alternate port disabled
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
