3-2: LAN Redundancy Flashcards Preview

CISA-2120 Switching > 3-2: LAN Redundancy > Flashcards

Flashcards in 3-2: LAN Redundancy Deck (22):
1

What is the outcome of a Layer 2 broadcast storm?

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

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?

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192.168.2.100

3

What is the purpose of HSRP?

It provides a continuous network connection when a router fails.

3

Which protocol information is being displayed in the output?

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GLBP

4

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

mode rapid-pvst

4

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

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

5

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

VLAN ID

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?

MST

6

Which three components are combined to form a bridge ID?

extended system ID, MAC address, bridge priority

8

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

Lowest MAC address

9

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

learning and forwarding

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?

Link types are determined automatically.

12

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

VRRPv2

14

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

Forwarding

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?

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

16

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

  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.

17

What is an advantage of PVST+?

PVST+ optimizes performance on the network through load sharing.

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?

STP and RSTP

19

What is a characteristic of a Layer 2 loop?

Broadcast frames are forwarded back to the sending switch.

20

Which RSTP ports are connected to end devices?

Edge ports

21

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

spanning-tree vlan 10 priority 0

22

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

Virtual