Course 2: Switches

Question 1

Effective Power

Answer 1

85% of power budget

Question 2

POE Power Wattage

Answer 2

15.4W

Question 3

POE+ Wattage

Answer 3

30 Watts

Question 4

IGMP

Answer 4

Internet Group Management Protocol

Question 5

VLAN

Answer 5

Virtual Local Area Network

Question 6

LACP

Answer 6

Link Aggregation Control Protocol

Question 7

STP

Answer 7

Spanning Tree Protocol

Question 8

Switches are which Layer?

Answer 8

Layer 2

Question 9

IGMP Snooping

Answer 9

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

Question 10

IGMP Snooping Drop

Answer 10

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

Question 11

IGMP Snooping Flood

Answer 11

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

Question 12

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

Answer 12

Resistance

Question 13

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?

Answer 13

300 meters

Question 14

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

Answer 14

Provide increased security

Question 15

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

Answer 15

Cancel electrical interference

Question 16

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

Answer 16

Hops

Question 17

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

Answer 17

Devices may drop offline or behave erratically.

Question 18

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

Answer 18

Perform a factory reset.

Question 19

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

Answer 19

VLANS.

Question 20

Why should a technician perform firmware updates on network equipment?

Answer 20

Access ongoing manufacture improvements.

Question 21

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

Answer 21

Decrease resistance over one long straight run.

Question 22

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

Answer 22

85%

Question 23

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

Answer 23

A) Extend the physical reach of the network

Question 24

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

Answer 24

C) Connecting two switches in separate buildings

Question 25

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

Answer 25

D) Switching loops

Question 26

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

Answer 26

Broadcast

Question 27

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

Answer 27

B) It increases throughput

Question 28

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

Answer 28

IGMP Snooping

Question 29

Switching capacity is a feature of a switch’s _________ ? A) Backplane B) Multicast C) Uplink D) Bandwidth

Answer 29

A) Backplane

Question 30

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

Answer 30

A) Ensure that port will stay powered when over budget

Question 31

Which Protocol manages multicast transmissions for a managed switch?

Answer 31

Internet Group Management Protocol (IGMP).