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CCNA 200-301 > Chapter 2 Fundamentals Of Ethernet Lans > Flashcards

Chapter 2 Fundamentals Of Ethernet Lans Flashcards

1
Q

What is IEEE

A

The institute of electrical and electronics engineers, they define the cabling, the connectors on the ends of the cables, the protocol rules, and everything else required to create an Ethernet LAN

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2
Q

10BASE-T Name, speed, standard,length

A

Ethernet
10Mbps
802.3
100m (copper)

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3
Q

100BASE-T Name, speed, standard,length

A

Fast Ethernet
100 Mbps
802.3u
100m (copper)

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4
Q

1000BASE-LX Name, speed, standard,length

A

Gigabit Ethernet
1000 Mbps
802.3z
(Fiber) 5000 m

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5
Q

1000BASE-T Name, speed, standard,length

A

Gigabit Ethernet
1000Mbps
802.3ab
100m (copper)

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6
Q

10GBASE-T Name, speed, standard,length

A

10 Gig Ethernet
10 Gbps
802.3an
100m (copper)

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7
Q

What kind of connector do Ethernet copper cables use

A

RJ-45

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8
Q

UTP

A

Unshielded twisted pair. The most common type of ethernet cable

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9
Q

EMI

A

Electromagnetic interference.

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10
Q

What is it called when there is EMI between wire pairs in the same cable.

A

Crosstalk

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11
Q

GBIC

A

Gigabit Ethernet Interface Converter. this is the original form factor for a removable transceiver for gigabit interfaces larger than SFPs(small form pluggable) supports speeds of 1 Gbps

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12
Q

SFP

A

Small Form Pluggable. The replacement for GBICs used on a gigabit interface with a smaller size, taking up less space on the side of the networking card or switch . SFP supports speeds upto 4.25 Gbps

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13
Q

SFP+

A

Small Form Pluggable Plus. It is the same size as the SFP but used on 10 Gbps interfaces.

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14
Q

How many pairs of wires does 10BASE-T and 100BASE-T require to transfer data?

A

2 pairs

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15
Q

How many pairs of wires does 1000BASE-T require to transfer data?

A

4 pairs

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16
Q

What devices transmit on pins 1 and 2

A

Pc nics
Routers
Wireless APs

17
Q

What devices transmit on pins 3 and 6

A

Hubs

Switches

18
Q

What are the five layers of fiber cabling

A 
Core
Cladding
Buffer
Strengthener 
Outer jacket
19
Q

What type of light does multi-mode fiber use

A

LED

20
Q

What type of light dose single mode fiber use

A

Laser

21
Q

True or false: you need two cables to transfer data with fiber . One for each direction

A

True.

22
Q

10GBASE-S type and distance

A

MM fiber 400m

23
Q

10GBASE-LX4 type and distance

A

MM fiber

300m

24
Q

10GBASE-LR type and distance

A

SM fiber

10km

25
Q

10GBASE-E type and distance

A

SM fiber

30km

26
Q

Min and max of a PDU

A

46-1500 kb

27
Q

What does a data link header and trailer consist of

A

Header

Preamble 7 - synchronization

SFD (start frame delimiter) 1 - signifies that the next bite begins the destination Mac address field.

Destination 6 - recipient

Source 6 - sender

Type 2 - ipv4 or ipv6

Trailer

FCS(frame Check Sequence) 4 - error detection

The data and pad in-between can vary between 46-1500 bytes

28
Q

What is a mac address

A

Media access control address . It is the hardcoded physical address on a nic. It is comprised of 6-bytes(or 48 bits) binary numbers, but it is usually displayed in a 12-digit hexadecimal number.

29
Q

What is an OUI

A

Organizationally unique identifier. It is a unique 3 byte code given by the IEEE. It is the first 3 bytes of a mac address . The last 3 are vendor assigned.

30
Q

Broadcast address

A

Frame sent to this address should be delivered to all devices on the ethernet LAN. It has a value of FFFF.FFFF.FFFF

31
Q

Multicast Address

A

frame sent to a multicast ethernet address will be copied and forwarded to a subset of the devices on the lan that volunteers to receive frames sent to a specific multicast address.

32
Q

Half duplex

A

The device must wait to send if it is currently receiving a frame. In other words it cannot send and receive at the same time.

33
Q

Full Duplex

A

Devices can send and receive that at the same time.

34
Q

CSMA/CD

A

Carrier sense multiple access with collision detection. This is an algorithm use with half duplex logic.

A device with a frame to send listings until the ethernet is not busy. When the ethernet is not busy, the sender begins to send the frame. The sender listens while sending to discover whether a collision occurs. If this happens then the sender independently chooses a random time to wait before trying again to avoid unfortunate timing.

35
Q

What devices usually operate in half duplex

A

Hubs

36
Q

Which devices usually operate in full Duplex

A

Switches

37
Q

What device does the term Ethernet shared media refer to

A

Hubs

CCNA 200-301 (7 decks)

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