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PCNA > Course 2: Switches > Flashcards

Course 2: Switches Flashcards

1
Q

Effective Power

A

85% of power budget

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2
Q

POE Power Wattage

A

15.4W

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3
Q

POE+ Wattage

A

30 Watts

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4
Q

IGMP

A

Internet Group Management Protocol

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5
Q

VLAN

A

Virtual Local Area Network

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6
Q

LACP

A

Link Aggregation Control Protocol

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7
Q

STP

A

Spanning Tree Protocol

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8
Q

Switches are which Layer?

A

Layer 2

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9
Q

IGMP Snooping

A

Listens for IGMP traffic and directs it only to the ports of affected devices

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10
Q

IGMP Snooping Drop

A

Drops unknown multicast transmissions. Can cause some multicast devices to stop working

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11
Q

IGMP Snooping Flood

A

When an unknown IGMP device sends a multicast, treats it as a broadcast until it detects an IGMP join request

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12
Q

Signal Attenuation over the length of an Ethernet cable is mainly the result of what?

A

Resistance

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13
Q

You have two switches in your network. According to specifications, what is the maximum distance that should be between any two hosts on your network?

A

300 meters

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14
Q

In addition to isolating heavy-use network traffic, why might a network manager implement VLANS?

A

Provide increased security

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15
Q

In Ethernet cables, why are the 4 pairs of wires twisted together?

A

Cancel electrical interference

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16
Q

Bottle necks and _______ are reasons that latency increases when switches are daisy-chained together.

A

Hops

17
Q

What might happen if PoE devices connected to your switch draw more power than its power budget?

A

Devices may drop offline or behave erratically.

18
Q

If for some reason, you cannot access the interface of a managed switch, which procedure would set it back to a default state?

A

Perform a factory reset.

19
Q

On managed switches, what feature allows you to isolate network traffic into separate broadcast domains?

A

VLANS.

20
Q

Why should a technician perform firmware updates on network equipment?

A

Access ongoing manufacture improvements.

21
Q

When the goal is to ____ , solid core cables perform better than stranded cables.

A

Decrease resistance over one long straight run.

22
Q

In precise PoE budgeting, you work with what percentage of the switch’s total power budget?

A

85%

23
Q

Adding additional ports to a network is one reason to add switches to your network. Which of the following is another?
A) Extend the physical reach of a network.
B) Improve DHCP address assignment.
C) Utilize Cat 7 Ethernet connections.
D) Reduce electromagnetic interference

A

A) Extend the physical reach of the network

24
Q

What is a primary use for fiber optic cable in a network?

A) Connecting a router to a switch
B) Connecting a managed power unit to a router
C) Connecting two switches in separate buildings
D) Connecting wireless access points

A

C) Connecting two switches in separate buildings

25
Q

Properly connected switches using the STP Protocol can help prevent which networking problem?

A) IGMP problems
B) Cable Attenuation
C) PoE failures
D) Switching loops

A

D) Switching loops

26
Q

Which method of transmission is used to send messages to all devices only within the broadcast domain?

A

Broadcast

27
Q

In addition to reliability, what is another advantage of Link Aggregation Protocol (LACP)?

A) It increases the total PoE budget
B) It increases throughout
C) It prevents wireless interference
D) It prevents the effects of resistance

A

B) It increases throughput

28
Q

To enable a switch to direct multicast traffic only to hosts that have joined an IP multicast group, you enable which feature?

A

IGMP Snooping

29
Q

Switching capacity is a feature of a switch’s _________ ?

A) Backplane
B) Multicast
C) Uplink
D) Bandwidth

A

A) Backplane

30
Q

Setting a port’s PoE priority to High will _____ ?

A) Ensure that port will stay powered when over budget
B) Increases the Wattage sent to that port
C) Provide 15 additional watts to the total budget
D) Provide 30 additional watts to the total budget

A

A) Ensure that port will stay powered when over budget

31
Q

Which Protocol manages multicast transmissions for a managed switch?

A

Internet Group Management Protocol (IGMP).

PCNA (5 decks)

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