nomenclature

Question 1

what does ____ stand for

TIA / EIA

Answer 1

Telecommunications Industry Association / Electronic Industries Alliance

Question 2

define:

socket

Answer 2

IP address + Port #

ex: 172.16.16.10 + 21 =
172. 16.16.10:21

Question 3

define:

network

Answer 3

2 or more computer systems linked together by a transmission medium that enables them to share information

Question 4

define:

node

Answer 4

device that communicates on a network

Question 5

define:

link

Answer 5

communication pathway between nodes

Question 6

define:

LAN

Answer 6

local area network

a network in a single location

Question 7

define:

WAN

Answer 7

wide area network

networks in different geographical locations but with shared links

Question 8

define:

PDU

Answer 8

protocol data unit

header + payload (data) = PDU

Question 9

define:

logical topology

Answer 9

layer 2 segment that includes multiple phsyical segments

Question 10

define:

frame

Answer 10

structured unit

stream of 1s & 0s arriving from the physical layer, organied by layer 2-data link

Question 11

define:

IEEE

Answer 11

Institute of Electrical and Electronics Engineers

Question 12

define:

MAC

Answer 12

Media Access Control

Question 13

define:

Session

or

Dialog

Answer 13

exchange of multiple messages between the client & server

Question 14

define:

robust switching protocol

Answer 14

can automatically recover from communication link failures

Question 15

example of

robust switching protocol

Answer 15

packet switching protocol

Question 16

define:

bandwidth

Answer 16

• the range of frequencies available to the communication channel
• also- data rate

Question 17

define:

baseband transmission

Answer 17

the complete bandwidth of the media is available to a single transmission channel

Question 18

define:

bandwidth is measured by

Answer 18

unit of time called Hertz (Hz)

Question 19

define:

hertz

hz

Answer 19

number of signaling cycles that can be completed per second

Question 20

define:

data rate

Answer 20

amount of information that can be transferred per second

Question 21

define:

baud rate

Answer 21

number of symbols that can be transmitted per second

measured in hertz - MHz or GHz

Question 22

define:

bit rate

Answer 22

amount of information that can be transmitted

measured in bits/second

Question 23

define:

attenuation

Answer 23

loss of signal strength

expressed in dB

Question 24

define:

noise

Answer 24

anything that gets transmitted within or close to the channel that isn’t the intended signal

Question 25

# define: Media Access Control MAC

Answer 25

methods a network technology uses to determine when nodes can communicate on the media & to deal with possible problems

Question 26

# define: deterministic media access

Answer 26

a central device/system specifies when & how long each node can transmit

Question 27

# example of deterministic media access

Answer 27

token ring

Question 28

# what are the benefits of deterministic media access

Answer 28

* when network access is time critical * all nodes get a chance

Question 29

# define: contention based MAC system

Answer 29

each node in the same collision domain competes

Question 30

# define: collision domain

Answer 30

all hosts attached to the same cable segment or connected via the same hub

Question 31

# define: CSMA

Answer 31

Carrier Sense Multiple Access ## Footnote detects activity ont the media & multiple nodes using the same media

Question 32

# define: CSMA/CA

Answer 32

Carrier Sense Multiple Access / Collision Avoidance

Question 33

# define: CSMA/CD

Answer 33

Carrier Sense Multiple Access / Collision Detection

Question 34

# what is the CSMA dialog control

Answer 34

half-duplex

Question 35

# explain how it works: CSMA/CD

Answer 35

on detecting a collision, the node broadcasts a jam signal. nodes then wait for backoff period before retrying

Question 36

# define: how CSMA/CD gains access

Answer 36

use "request to send" schemes to gain access tot he media

Question 37

# what is the contention based media access used by 802.11

Answer 37

CSMA/CA

Question 38

# define: switches allow for ____ dialog control

Answer 38

full-duplex

Question 39

# define: broadcast domain

Answer 39

any given node will receive all the traffic transmitted with that domain

Question 40

# define: unicast

Answer 40

traffic is processed only if specifically addressed to a single recipient

Question 41

# define: when is broadcast traffic often used?

Answer 41

* host needs to discover the address of another host * host needs to autoconfigure its own address * when routers communicate updates

Question 42

# define: how are colission domains seperated

Answer 42

bridges

Question 43

# define: how are colission domains effectively eliminated?

Answer 43

switches

Question 44

# what is the relationship between collision domain & broadcast domains

Answer 44

1 broadcast domain can contain multiple collision domains 1 collision domain is only associated with only 1 broadcast domain

Question 45

# what is IP address + Port # ex: 172.16.16.10 + 21 = 172. 16.16.10:21

Answer 45

socket

Question 46

# what is 2 or more computer systems linked together by a transmission medium that enables them to share information

Answer 46

network

Question 47

# what is a device that communicates on a network

Answer 47

node

Question 48

# what is a communication pathway between nodes

Answer 48

link

Question 49

# what is a local area network a network in a single location

Answer 49

LAN

Question 50

# what is a wide area network networks in different geographical locations but with shared links

Answer 50

WAN

Question 51

# what is a protocol data unit header + payload (data) = PDU

Answer 51

PDU

Question 52

# what is a layer 2 segment that includes multiple phsyical segments

Answer 52

logical topology

Question 53

# what is the stream of 1s & 0s arriving from the physical layer, organied by layer 2-data link structured unit

Answer 53

frame

Question 54

# what do you call the exchange of multiple messages between the client & server

Answer 54

Session or Dialog

Question 55

# what can automatically recover from communication link failures

Answer 55

robust switching protocol

Question 56

# what is * the range of frequencies available to the communication channel * also- data rate

Answer 56

bandwidth

Question 57

# what is the complete bandwidth of the media is available to a single transmission channel

Answer 57

baseband transmission

Question 58

# what is measured by unit of time called **Hertz** (Hz)

Answer 58

bandwidth

Question 59

# what is the unit of measurement for the number of signaling cycles that can be completed per second

Answer 59

hertz hz

Question 60

# what is the label for the amount of information that can be transferred per second

Answer 60

data rate

Question 61

# what is the label for the number of symbols that can be transmitted per second measured in hertz - MHz or GHz

Answer 61

baud rate

Question 62

# what is the label for the amount of information that can be transmitted measured in bits/second

Answer 62

bit rate

Question 63

# what is loss of signal strength expressed in dB

Answer 63

attenuation

Question 64

# what is anything that gets transmitted within or close to the channel that isn't the intended signal

Answer 64

noise

Question 65

# what is the name of the methods a network technology uses to determine when nodes can communicate on the media & to deal with possible problems

Answer 65

Media Access Control MAC

Question 66

# what do we call a central device/system that specifies when & how long each node can transmit

Answer 66

deterministic media access

Question 67

# define: token ring uses what type of media access?

Answer 67

deterministic media access

Question 68

# what type of access control should you choose when * when network access is time critical * all nodes need to get a chance

Answer 68

deterministic media access

Question 69

# what do you call the type of access where each node in the same collision domain competes

Answer 69

contention based MAC system

Question 70

# what is the label when all hosts attached to the same cable segment or connected via the same hub

Answer 70

collision domain

Question 71

# which dialog control uses half-duplex

Answer 71

CSMA dialog control

Question 72

# what access control, on detecting a collision, the node broadcasts a jam signal. nodes then wait for backoff period before retrying

Answer 72

CSMA/CD

Question 73

# which access control use "request to send" schemes to gain access tot he media

Answer 73

CSMA/CD

Question 74

# what is the label for when any given node will receive all the traffic transmitted with that domain

Answer 74

broadcast domain

Question 75

# name for when traffic is processed only if specifically addressed to a single recipient

Answer 75

unicast

Question 76

# define: bit

Answer 76

* is atomic: the smallest unit of storage * stores just a 0 or 1 * "In the computer it's all 0's and 1's" ... bits * Anything with two separate states can store 1 bit * In a chip: electric charge = 0/1 * In a hard drive: spots of North/South magnetism = 0/1 * 8 bits make 1 byte

Question 77

# define: byte

Answer 77

* 1 byte = collection of 8 bits * e.g. 0 1 0 1 1 0 1 0 * 1 byte can store 1 character, e.g. 'A' or 'x' or '$'

Question 78

# define: SAN =

Answer 78

Storage Area Network