Quiz 2

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

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 all port costs to reach the root and use the path with the lowest cost.

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

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 is used within a group of routers for selecting an active device and a standby device to provide gateway services to a LAN.

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

Manually remove redundant links in the switched network

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+

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

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 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

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

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