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CCNA Study > Chapter 2: Fundamentals Of Ethernet LANs > Flashcards

Chapter 2: Fundamentals Of Ethernet LANs Flashcards

1
Q

Which device types transmit on pins 1 and 2?

A

PCs / Routers / WAP

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2
Q

Which device types transmit on pins 3 and 6?

A

Hubs / Switches

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3
Q

What cable type is required to connect 2 switches?

A

Crossover cable

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4
Q

What cable type is required to connect a router to a switch?

A

Straight through cable

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5
Q

What is multi-mode fibre?

A

Fibre which allows light to enter the core from multiple angles

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6
Q

What is single-mode fibre?

A

Fibre which sends light from a specific angle

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7
Q

Which has a longer maximum distance, multi or single mode?

A

Single-mode

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8
Q

What is 1000BASE-LX also known as? What is it made from, and what is it’s maximum speed and distance?

A

802.3z / Fibre / 5000m / 1000Mbps

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9
Q

What is 802.3an also known as? What is it made from, and what is it’s maximum speed and distance?

A

10GBASE-T / Copper / 100m / 10Gbps

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10
Q

Provide the formal informal and formal IEEE names for the copper cable to provide speeds of 1000Mbps over 100m distance

A

1000BASE-T / 802.3ab

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11
Q

How many bytes make up the OUI in a MAC?

A

3

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12
Q

What is FFFF.FFFF.FFFF? What does it do?

A

Broadcast address. Sends frames to all devices on the LAN

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13
Q

What fields create an Ethernet header?

A

Preamble
Start Frame Delimiter (SFD)
Destination MAC
Source MAC
Type
Data

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14
Q

What is FCS? What does it do and how large is it?

A

Frame check sequence. Determines if any transmission errors occurred. 4 bytes

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15
Q

What is preamble? How large is it?

A

Identifies the start of a frame. 7 bytes.

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16
Q

How many bytes is a MAC?

A

6 bytes

17
Q

What field is in an Ethernet trailer?

A

Frame sequence check (FCS)

18
Q

What is CSMA/CD? What does it do?

A

Carrier Sense Multiple Access with Collision Detection / Assists with collision detection in half duplex environments

19
Q

Name 2 standards for multi-mode, and list their max distances

A

10GBASE-S (400m) / 10GBASE-LX4 (300m)

20
Q

What mode are 10GBASE-LR and 10GBASE-E? What is their maximum distance?

A

Single-mode. 10km / 30km respectively

21
Q

What fibre cable type would you recommend for a user on a low budget to connect 2 devices 300m apart?

A

Multi-mode

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