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ISDN1 > Ch. 2 The Fundamentals Of Ethernet LANs > Flashcards

Ch. 2 The Fundamentals Of Ethernet LANs Flashcards

0
Q

A device that provides many physical ports into which cables can be connected

A

A switch

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1
Q

What is a family of LAN standards that together define the physical and data link layers of the worlds most popular wired LAN technology called?

A

An Ethernet

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2
Q

A networking device that communicates with the Ethernet switch wirelessly via radio waves

A

An access point AP

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3
Q

UTP

A

Unshielded twisted pair (cable)

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4
Q

UTP suffix:

Fiber optic suffix:

A

T

X

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5
Q

10 Mbps name

A

Ethernet 10base-t

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6
Q

100 Mbps name

A

Fast Ethernet 100base-t

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7
Q

1000 Mbps name

A

Gigabit Ethernet 1000 base-t and 1000base-lx

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8
Q

10 gps name

A

10 gig Ethernet 10gbase-t

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9
Q

What is a combination of user devices, LAN switches, and different kinds of cabling called

A

Ethernet LAN

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10
Q

The header and trailer of a data link protocol plus the encapsulated data inside the header and trailer

A

A frame

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11
Q

What are the threes most commonly used Ethernet standards

A

10base-t Ethernet
100base-t fast Ethernet (FE)
1000base-t gigabit Ethernet (GE)

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12
Q

FE

A

Fast Ethernet

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13
Q

GE

A

Gigabit Ethernet

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14
Q

Rules two devices follow to send data are called

A

Encoding scheme

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15
Q

EMI

A

Electromagnetic interference

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16
Q

EMI between wire pairs in the same cable

A

Crosstalk

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17
Q

Any physical cables between two Ethernet nodes

A

Ethernet link

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18
Q

NIC

A

Network interface card

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19
Q

GBIC

A

Gigabit interface converter

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20
Q

SFP

A

Small form factor pluggables (let’s you swap connections on cisco devices, rj-45 to GBIC for example)

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21
Q

How many wire pairs does 10base-t and 100base-t use?

1000base-t?

A

2 pairs one for each direction

4 pairs

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22
Q

Ethernet NIC transmitters use pins _____ and _____ to transmit

A

1 and 2

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23
Q

Ethernet NIC receivers use pins ____ and _____ to receive

A

3 and 6

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24
Q

LAN switches use pins ____and ____ to receive

A

1 and 2

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25
Q

LAN receivers use pins ____ and ____ to transmit

A

3 and 6

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26
Q

Straight through cable is pinout is pinned how?

A 
1 to 1
2 to 2
3 to 3
. .  . .
6 to 6
27
Q

A crossover cable is pinned how?

A

1 to 3
2 to 6
3 to 1
6 to 2

28
Q

Use a ____ cable if the endpoints transmit on the same pin pair

A

Crossover cable

29
Q

Use a _______. Cable if the endpoints transmit on different pin pairs

A

Straight through

30
Q

PCs, NICS, routers, WAP(Ethernet interfaces) transmit on what pins?

A

1 and 2

31
Q

Hubs and switches transmit in what pins?

A

3 and 6

32
Q

How is UTP cabling pinouts for 1000base-t done?

A 
1 to 3
2 to 6
3 to 1 
4 to 7
5 to 8
6 to 2 
7 to 4
8 to 5
33
Q

MAC

A

Media access control

34
Q

How long are MAC addresses?

A

6 byte (48 bit long) binary numbers

35
Q

The term ____ refers to the fact that the address represents one interface to the Ethernet LAN

A

Unicast

36
Q

OUI

A

Organizationally unique identifier

37
Q

An identifier 3 byte code to ensure every MAC address is universally unique

A

An OUI

38
Q

BIA

A

Burned in address

39
Q

An Ethernet uses _____ ______ to identify more than one LAN interface card. A frame sent to a group can be delivered to multiple devices on the LAN or all of them

A

Group addresses

40
Q

What are the two types of group addresses for Ethernet

A

Broadcast and multicast

41
Q

Frames sent to a broadcast address are delivered to

A

All devices on the Ethernet LAN

42
Q

Frames sent to a ____ _____ _____ will be copied and forwarded to a subset of the devices on the LAN that elect to receive frames

A

Multicast Ethernet address

43
Q

The _____ ______ _____ identifies the type of network layer (layer 3) packet that sits inside the Ethernet frame

A

Ethernet type field

44
Q

What are the most common network protocols

A

TCP/IP V4 and V6

Aka IPv4 and IPv6

45
Q

FCS

A

Frame check sequence

46
Q

What is the only field in the Ethernet trailer

A

The frame check sequence (FCS)

47
Q

Logic in which a port sends data only when it is also not receiving data

A

Half duplex

48
Q

When the NIC or switch port has no half duplex restrictions it can run in ______

A

Full duplex

49
Q

When can a LAN use full duplex

A

When it has all PCs and LAN switches and no hubs

50
Q

CSMA/CD

A

Carrier sense multiple access with collision detection

51
Q

In half duplex ______ detects when someone is transmitting and waits to transmit until the first transmission is complete

A

CSMA/CD

52
Q

What is any physical cable between two Ethernet nodes referred to

A

An Ethernet link

53
Q

How are MAC addresses listed

A

As 12 digit hexadecimal numbers

54
Q

The first part of a MAC code is assigned by ______ and the last part is assigned by _______

A

IEEE and the manufacturer

55
Q

LAN addresses, Ethernet addresses, hardware addresses, burned in addresses, universal addresses, physical addresses, and MAC addresses are all type of:

A

Ethernet addresses

56
Q

If a soho uses a LAN, and some users connect via cable while others connect wirelessly who is using the Ethernet?

A

The cables devices only, not the wireless ones

57
Q

What standard defines gigabit Ethernet over UTP cabling

A

1000base-t

58
Q

On an Ethernet crossover cable, pins 1 and 2 connect to pins ____ and ____

A

3 and 6

59
Q 
Pick three that would use a straight through crossover cable on a 100base-t network 100base-t network.
PC and router
PC and switch
Hub and switch
Router and hub
Wireless AP(Ethernet port) and switch
A

PC and switch
Router and hub
WAP (Ethernet port) and switch

60
Q

What happens on a half duplex when a CSMA/CD is in use and there is a collision

A

The algorithm defines how the computers should notice the collision and recover from the collision

61
Q

Where is the Ethernet FCS field located

A

In the trailer, not the header

62
Q

Where does the manufacturer put their unique identifier and what is it called

A

In the first 3 bytes, in the first half of the address, the OUI (organizationally unique identifier

63
Q

What are the two ways to send one frame to multiple devices on a LAN

A

Broadcast and multicast

64
Q

When is half duplex needed

A

When a hub is in the Ethernet LAN

ISDN1 (28 decks)

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