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Network+ > Section 2.3 > Flashcards

Section 2.3 Flashcards

1
Q

What does MAC stand for?

A

Media Access Control

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2
Q

How many bytes long is a MAC address?

A

6 bytes

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3
Q

What is the first section of the MAC address called?

A

OUI: Organizationally Unique Identifier/Manufacturer’s ID

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4
Q

What is the second section of the MAC address called?

A

NICS: Network Interface Controller-Specific/Serial number

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5
Q

What is Full Duplex

A

Data can be sent and received at the same time

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6
Q

Switch vs Hub, which does half vs full duplex

A

Switches do full, hubs do half

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7
Q

What happens when there’s a transmission collision on a hubbed network?

A

The network hears the collision, waits a random amount of time and tries again

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8
Q

Command to list all MAC and associated IP addresses

A

arp -a

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9
Q

What does ARP stand for?

A

Address Resolution Protocol

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10
Q

What does ARP do?

A

Similar to DNS and NAT, it translates between IP and MAC addresses

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11
Q

What does VLAN stand for?

A

Virtual Local Area Network

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12
Q

What’s the purpose of VLAN?

A

to divide up a single switch for multiple LANs

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13
Q

What is a VLAN trunk?

A

A VLAN trunk allows you to connect the VLANs of one switch to another’s using a single connection

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14
Q

How does data on a VLAN trunk know where to go?

A

Data that enters a VLAN trunk is tagged so it knows where to go at its destination

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15
Q

What prevent data from looping endlessly in Layer 3?

A

Time To Live/TTL

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16
Q

What prevents data from looping endlessly in Layer 2?

A

Rapid Spanning Tree Protocol/RSTP

17
Q

How do you test to see if jumbo frames can be transmitted?

A

Ping with a jumbo frame size

18
Q

What’s the MTU of a Jumbo Frame?

A

9,000 Bytes

19
Q

What’s the MTU of a standard frame?

A

1,500 Bytes

20
Q

How is Voice VLAN configured?

A

Most switches automatically configure VoIP devices when they’re detected

21
Q

What is a Voice VLAN?

A

A dedicated VLAN for VoIP traffic

22
Q

LACP

A

Link Aggregation Control Protocol

23
Q

What’s the difference between Port Aggregation and LACP?

A

Port Aggregation is static and requires manual configuration

LACP is dynamic and is configured automatically

24
Q

How does Port Aggregation/LACP work?

A

It’s the combining of multiple ports between switches to increase bandwidth and redundancy

25
Q

What is Neighbor Discovery Protocol?

A

ARP for IPv6 networks

26
Q

What is 802.1Q?

A

Port Tagging for VLANs

27
Q

What utility does Port Mirroring have?

A

Traffic analysis

28
Q

What’s the difference between PoE and PoE+?

A

PoE+ provides more power

Network+ (33 decks)

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