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Professor M A+ 220-1101 Course Notes > 2.2 Network Devices > Flashcards

2.2 Network Devices Flashcards

1
Q

Some network devices are combined together like routers/switches/and firewalls. T or F?

A

True

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2
Q

What is the purpose of routers?

A

Routes and forwards traffic between IP subnets based on IP address

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3
Q

What are routers inside of switches sometimes called?

A

Layer 3 switches

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4
Q

What network types can a router connect? (4)

A

LAN, WAN, copper, fiber

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5
Q

How do switches know where to forward data?

A

Based on data link address (source/destination MAC address)

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6
Q

The bridging done by switches is carried out by what hardware?

A

ASIC (Application-specific integrated circuit)

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7
Q

What’s another name for data link address?

A

MAC address

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8
Q

What network device is the core of an enterprise network?

A

switches

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9
Q

What network device may provide PoE?

A

switches

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10
Q

What type of switch provides routing functionality?

A

a multilayer switch

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11
Q

What is an unmanaged switch?

A

Plug and play (very few configuration options)

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12
Q

Unmanaged switches don’t allow VLANs. T or F?

A

True

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13
Q

What type of switch allows very little integration with other devices?

A

Unmanaged switch (it has no management protocols)

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14
Q

Which has a lower price point, unmanaged or managed switches?

A

unmanaged

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15
Q

What type of switch provides VLAN support?

A

managed switches

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16
Q

What does a switch with VLAN support allow it to do?

A

interconnect with other switches via 802.1Q

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17
Q

Which type of switch allows traffic prioritization? What type of traffic gets higher priority? (2)

A

Managed switch
Voice traffic gets higher priority

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18
Q

What does STP stand for? What is it used for? (2)

A

Spanning Tree Protocol
It is used on managed switches for redundancy support

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19
Q

SNMP is available on what type of switch?

A

Managed switches

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20
Q

Managed switches allow port mirroring. What is this?

A

Port mirroring is used on a network switch to capture packets on one port and send copies to a network monitoring connection on another switch port

(keeps an eye on network performance)

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21
Q

Is an access point and a wireless router the same thing?

A

No, a wireless router is a router AND an access point in a single device

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22
Q

What is an access point?

A

A bridge that extends the wired network onto the wireless network

(increases the scope of the wired network to become wireless)

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23
Q

How does an access point make forwarding decisions?

A

based on MAC address

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24
Q

A cable modem is used for what type of connection?

A

Broadband

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25
Q

Broadband transmissions are across what frequencies?

A

multiple

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26
Q

What are the types of traffic seen on broadband networks?

A

different traffic types

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27
Q

What does DOCSIS stand for?

A

Data over Cable Service Interface Specification

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28
Q

Data on the “cable” network is known as?

A

DOCSIS (data over cable service interface specification)

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29
Q

For cable networks, speeds up to ____ are available

A

Speeds up to 1 Gigabit/s

30
Q

Cable provides multiple services such as: (3)

A

Data
Voice
Video

31
Q

What does ADSL stand for?

A

Asymmetric Digital Subscriber Line

32
Q

What does ADSL use?

A

telephone lines

33
Q

What does asymmetric mean in terms of DSL modems?

A

The download speed is faster than the upload speed

34
Q

What is the distance limitation for DSL?

A

10,000 foot limitation from the central office (CO)

35
Q

What speeds are common for DSL?

A

52 Mbit/s downstream
16 Mbit/s upstream

36
Q

Faster DSL speeds may be possible if….?

A

may be possible if located closer to the CO

37
Q

Patch panels are a combination of what 2 things?

A

Punch-down blocks
RJ-45 connectors

38
Q

Runs from desks are made multiple times and can be removed from the patch panel. T or F?

A

False

Runs from desks are made once and permanently punched down to patch panel

39
Q

What is required to connect a patch panel to a switch?

A

Use the existing cables, no special tools required and can be easily changed

40
Q

How do firewalls filter traffic? (2)

A

by port number, and some can filter based on the application

41
Q

Firewalls work in what layer of the OSI model?

A

OSI layer 4 (TCP/UDP)

42
Q

What can encrypt the traffic coming into/out of the network and protect your traffic between sites?

A

Firewalls

43
Q

What can you use to proxy traffic?

A

a firewall (a common security technique)

44
Q

Most firewalls can be what type of devices?

A

Layer 3 devices (routers)

45
Q

With PoE, can 1 wire function as both network and electricity?

A

Yes

46
Q

Phones, cameras, and wireless access points in difficult-to-power areas can be powered by?

A

PoE

47
Q

How is power provided for PoE?

A

at the switch

48
Q

PoE with built-in power is called?

A

Endspans

(power at the switch is the END of it)

49
Q

PoE that needs an in-line power injector is called what?

A

Midspans

50
Q

Where are midspans placed?

A

between a network switch and powered devices

51
Q

What is the original PoE specification called and when was it introduced? (2)

A

PoE: IEEE 802.3af
2003

52
Q

The original PoE spec provided how many watts of DC power, and how many mA of max current?

A

15.4 watts DC power
350 mA max current

53
Q

What is the 2nd PoE standard called? When was it introduced? (2)

A

PoE+: IEEE 802.3at
2009

54
Q

The 2nd specification of PoE provided how many watts of DC power, and how many mA of max current?

A

25.5 watts DC power
600 mA max current

55
Q

What is the 3rd PoE specification called? When was it introduced?

A

PoE++: IEEE 802.3bt
2018

56
Q

The 3rd spec of PoE provided how many watts of DC power, and how many mA of max current?

A

Type 3: 51 W, 600 mA max current
Type 4: 71.3 W, 960 mA max current

57
Q

What’s the network speed for PoE++?

A

PoE with 10GBASE-T

58
Q

A hub is known as a?

A

multi-port repeater

59
Q

What is a multi-port repeater?

A

traffic going in one port is repeated to another port

60
Q

With what device is everything half-duplex?

A

a hub

61
Q

What is half-duplex?

A

communication in both directions but one direction at a time

62
Q

What network device becomes less efficient as traffic increases?

A

a Hub

63
Q

What are the speeds for a Hub?

A

10 megabit/ 100 megabit

64
Q

What does ONT stand for?

A

Optical Network Terminal

65
Q

ONT is for what kind of network?

A

Fiber

66
Q

What is a demarcation point?

A

the physical point at which a telecommunications company’s public network ends and the customer’s private network begins

67
Q

ONT leads to a terminal box on the side of the building where one side is the ISP responsibility and the other side is your network. T or F?

A

True

68
Q

What does NIC stand for?

A

Network Interface Card

69
Q

Every device on a network has a ___

(phones, computers, servers, printers, routers, switches, tablets, cameras, etc)

A

NIC

70
Q

Is a NIC specific to the network type?

A

Yes (Ethernet, WAN, wireless, etc)

71
Q

Where are NICs often located?

A

Built-in to the motherboard or added as an expansion card

72
Q

NIC has many options like… (4)

A

single port
multi-port
copper
fiber

Professor M A+ 220-1101 Course Notes (21 decks)

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