ccna 3 chapter 2

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

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

An administrator is troubleshooting a switch and wants to verify if it is a root bridge. What command can be used to do this? show spanning-tree show running-config show startup-config show vlan

show spanning-tree

Which STP priority configuration would ensure that a switch would always be the root switch? spanning-tree vlan 10 root primary spanning-tree vlan 10 priority 61440 spanning-tree vlan 10 priority 0 spanning-tree vlan 10 priority 4096

spanning-tree vlan 10 priority 0

Fill in the blank. In FHRP operation, two or more routers are represented as a single _____ router.

virtual

Refer to the exhibit. A network engineer is troubleshooting host connectivity on a LAN that uses a first hop redundancy protocol. Which IPv4 gateway address should be configured on the host? 192.168.2.0 192.168.2.1 192.168.2.2 192.168.2.100

192.168.2.100

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. What is the path cost from Switch_4 to the root bridge? 19 38 57 76

57

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.

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

What is a characteristic of a Layer 2 loop? -A switch is continually forwarding the same unicast frame. -Routers continually forward packets to other routers. -Broadcast frames are forwarded back to the sending switch. -The Time-to-Live attribute of a frame is set to infinity.

Broadcast frames are forwarded back to the sending switch.

Which two issues are the result of a broadcast storm? (Choose two.) -During a broadcast storm, a switch will forward excessive Layer 2 broadcast traffic to the router, and the router will then forward these broadcasts to its attached networks. -Due to high processing demands during a broadcast storm, communication may fail between end stations in the broadcast domain. -In a network saturated with broadcast traffic, new traffic arriving at the switch will be forwarded into the broadcast domain, which further consumes available bandwidth. -During a broadcast storm, constant changes to the MAC address table prevent a switch from accurately forwarding frames. -During a broadcast storm, switches with high speed interfaces will forward traffic in half-duplex mode to conserve available bandwidth.

Due to high processing demands during a broadcast storm, communication may fail between end stations in the broadcast domain. During a broadcast storm, constant changes to the MAC address table prevent a switch from accurately forwarding frames

After the election of the root bridge has been completed, how will switches find the best paths to the root bridge? -Each switch will analyze the sum of the hops to reach the root and use the path with the fewest hops. -Each switch will analyze the BID of all neighbors to reach the root and use the path through the lowest BID neighbors. -Each switch will analyze the port states of all neighbors and use the designated ports to forward traffic to the root. -Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.

Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.

Refer to the exhibit. Which protocol information is being displayed in the output? FHRP HSRP GLBP VRRP

GLBP

A network administrator is overseeing the implementation of first hop redundancy protocols. Which two protocols will not be able to function with multivendor devices? (Choose two.) HSRP VRRP GLBP IRDP

GLBP HSRP

When first hop redundancy protocols are used, which two items will be shared by a set of routers that are presenting the illusion of being a single router? (Choose two.) hostname IP address BID static route MAC address

IP address MAC address

What is the purpose of HSRP? -It prevents a rogue switch from becoming the STP root. -It prevents malicious hosts from connecting to trunk ports. -It provides a continuous network connection when a router fails. -It enables an access port to immediately transition to the forwarding state.

It provides a continuous network connection when a router fails.

Which statement describes HSRP?​ -If the virtual router master fails, one router is elected as the virtual router master with the other routers acting as backups. -It is an open standard protocol. -It uses ICMP to allow IPv4 hosts to locate routers that provide IPv4 connectivity to remote IP networks.​ -It is used within a group of routers for selecting an active device and a standby device to provide gateway services to a LAN.

It uses ICMP to allow IPv4 hosts to locate routers that provide IPv4 connectivity to remote IP networks.​

A network administrator is preparing the implementation of Rapid PVST+ on a production network. How are the Rapid PVST+ link types determined on the switch interfaces? -Link types can only be determined if PortFast has been configured. -Link types can only be configured on access ports configured with a single VLAN. -Link types are determined automatically. -Link types must be configured with specific port configuration commands.

Link types are determined automatically.

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? PVST+ STP Rapid PVST+ MST

MST

Match the STP protocol with the correct description. (Not all options are used.) -a protocol that allows multiple VLANs to run in a single spanning-tree instance Rapid PVST+ MSTP STP

MSTP

What is one way to correct a spanning tree failure? -Replace all instances of STP with RSTP. -Insert redundant links to replace the failed STP links. -Replace the cables on failed STP links. -Manually remove redundant links in the switched network.

Manually remove redundant links in the switched network

What is the outcome of a Layer 2 broadcast storm? -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. -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.

What is an advantage of PVST+? -PVST+ optimizes performance on the network through load sharing. -PVST+ requires fewer CPU cycles for all the switches in the network. -PVST+ reduces bandwidth consumption compared to traditional implementations of STP that use CST. -PVST+ optimizes performance on the network through autoselection of the root bridge.

PVST+ optimizes performance on the network through load sharing

Which two types of spanning tree protocols can cause suboptimal traffic flows because they assume only one spanning-tree instance for the entire bridged network? (Choose two.) PVST+ RSTP MSTP Rapid PVST+ STP

RSTP STP

Match the STP protocol with the correct description. (Not all options are used.) -a Cisco enhancement of RSTP to provide a spanning-tree instance for each VLAN Rapid PVST+ STP MSTP

Rapid PVST+

To obtain an overview of the spanning tree status of a switched network, a network engineer issues the show spanning-tree command on a switch. Which two items of information will this command display? (Choose two.) -The root bridge BID. -The status of native VLAN ports. -The role of the ports in all VLANs. -The number of broadcasts received on each root port. -The IP address of the management VLAN interface.

The root bridge BID. The role of the ports in all VLANs.

Match the STP protocol with the correct description. (Not all options are used.) -the legacy standard for STP that runs all VLANs in a single spanning-tree instance MSTP Rapid PVST+ STP

STP

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Which switch is the root bridge? Switch_2 Switch_1 Switch_4 Switch_3

Switch_4

Which two statements describe a switch port that is configured with PortFast? (Choose two.) -The switch port immediately transitions from the listening to the forwarding state. -The switch port immediately transitions from blocking to the forwarding state. -The switch port should never receive BPDUs. -The switch port immediately processes any BPDUs before transitioning to the forwarding state. -The switch port sends DHCP requests before transitioning to the forwarding state.

The switch port immediately transitions from blocking to the forwarding state. The switch port should never receive BPDUs.

What additional information is contained in the 12-bit extended system ID of a BPDU? port ID MAC address IP address VLAN ID

VLAN ID

Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs? HSRP SLB VRRPv2 GLBP

VRRPv2

What is an accurate description of redundancy? -configuring a router with a complete MAC address database to ensure that all frames can be forwarded to the correct destination -configuring a switch with proper security to ensure that all traffic forwarded through an interface is filtered -designing a network to use multiple virtual devices to ensure that all traffic uses the best path through the internetwork -designing a network to use multiple paths between switches to ensure there is no single point of failure

designing a network to use multiple paths between switches to ensure there is no single point of failure

Which three port states are used by Rapid PVST+? (Choose three.) discarding blocking trunking listening learning forwarding

discarding learning forwarding

Which RSTP ports are connected to end devices? edge ports designated ports trunk ports root ports

edge ports

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

extended system ID bridge priority MAC address

Which port state will switch ports immediately transition to when configured for PortFast? listening forwarding learning blocking

forwarding

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

learning forwarding

When PVST is running over a switched network, which port state can participate in BPDU frame forwarding based on BPDUs received, but does not forward data frames? blocking listening forwarding disabled

listening

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

lowest MAC address

Fill in the blank. Do not use abbreviations. The spanning-tree _____ global configuration command is used to enable Rapid PVST+.

mode rapid-pvst