3-2: LAN Redundancy

Question 1

What is the outcome of a Layer 2 broadcast storm?

Answer 1

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

Question 2

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?

Answer 2

192.168.2.100

Question 3

What is the purpose of HSRP?

Answer 3

It provides a continuous network connection when a router fails.

Question 3

Which protocol information is being displayed in the output?

Answer 3

GLBP

Question 4

The spanning-tree ___________ global configuration command is used to enable Rapid PVST+.

Answer 4

mode rapid-pvst

Question 4

Which two network design features require Spanning Tree Protocol (STP) to ensure correct network operation?

Answer 4

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

Question 5

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

Answer 5

VLAN ID

Question 6

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?

Answer 6

MST

Question 6

Which three components are combined to form a bridge ID?

Answer 6

extended system ID, MAC address, bridge priority

Question 8

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

Answer 8

Lowest MAC address

Question 9

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

Answer 9

learning and forwarding

Question 10

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?

Answer 10

Link types are determined automatically.

Question 12

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

Answer 12

VRRPv2

Question 14

Which port state will switch ports immediately transition to when configured for PortFast?

Answer 14

Forwarding

Question 15

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?

Answer 15

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

Question 16

What are the 4 steps that occur during the HSRP failover process?

Answer 16

1. The rowarding router fails.
2. The standby router stops seeing hello messages from the forwarding router.
3. The standby router assumes the role of the forwarding router.
4. The new forwarding router assumes both the IP and MAC addresses of the virutal router.

Question 17

What is an advantage of PVST+?

Answer 17

PVST+ optimizes performance on the network through load sharing.

Question 18

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?

Answer 18

STP and RSTP

Question 19

What is a characteristic of a Layer 2 loop?

Answer 19

Broadcast frames are forwarded back to the sending switch.

Question 20

Which RSTP ports are connected to end devices?

Answer 20

Edge ports

Question 21

Which STP priority configuration would ensure that a switch would always be the root switch?

Answer 21

spanning-tree vlan 10 priority 0

Question 22

In FHRP operation, two or more routers are represented as a single _______ router.

Answer 22

Virtual