nomenclature Flashcards
what does ____ stand for
TIA / EIA
Telecommunications Industry Association / Electronic Industries Alliance
define:
socket
IP address + Port #
ex: 172.16.16.10 + 21 =
172. 16.16.10:21
define:
network
2 or more computer systems linked together by a transmission medium that enables them to share information
define:
node
device that communicates on a network
define:
link
communication pathway between nodes
define:
LAN
local area network
a network in a single location
define:
WAN
wide area network
networks in different geographical locations but with shared links
define:
PDU
protocol data unit
header + payload (data) = PDU
define:
logical topology
layer 2 segment that includes multiple phsyical segments
define:
frame
structured unit
stream of 1s & 0s arriving from the physical layer, organied by layer 2-data link
define:
IEEE
Institute of Electrical and Electronics Engineers
define:
MAC
Media Access Control
define:
Session
or
Dialog
exchange of multiple messages between the client & server
define:
robust switching protocol
can automatically recover from communication link failures
example of
robust switching protocol
packet switching protocol
define:
bandwidth
- the range of frequencies available to the communication channel
- also- data rate
define:
baseband transmission
the complete bandwidth of the media is available to a single transmission channel
define:
bandwidth is measured by
unit of time called Hertz (Hz)
define:
hertz
hz
number of signaling cycles that can be completed per second
define:
data rate
amount of information that can be transferred per second
define:
baud rate
number of symbols that can be transmitted per second
measured in hertz - MHz or GHz
define:
bit rate
amount of information that can be transmitted
measured in bits/second
define:
attenuation
loss of signal strength
expressed in dB
define:
noise
anything that gets transmitted within or close to the channel that isn’t the intended signal
define:
Media Access Control
MAC
methods a network technology uses to determine when nodes can communicate on the media & to deal with possible problems
define:
deterministic media access
a central device/system specifies when & how long each node can transmit
example of
deterministic media access
token ring
what are the benefits of
deterministic media access
- when network access is time critical
- all nodes get a chance
define:
contention based MAC system
each node in the same collision domain competes
define:
collision domain
all hosts attached to the same cable segment or connected via the same hub
define:
CSMA
Carrier Sense Multiple Access
detects activity ont the media & multiple nodes using the same media
define:
CSMA/CA
Carrier
Sense
Multiple
Access
/
Collision
Avoidance
define:
CSMA/CD
Carrier
Sense
Multiple
Access
/
Collision
Detection
what is the
CSMA dialog control
half-duplex
explain how it works:
CSMA/CD
on detecting a collision, the node broadcasts a jam signal. nodes then wait for backoff period before retrying
define:
how CSMA/CD gains access
use “request to send” schemes to gain access tot he media
what is the
contention based media access used by 802.11
CSMA/CA
define:
switches allow for ____ dialog control
full-duplex
define:
broadcast domain
any given node will receive all the traffic transmitted with that domain
define:
unicast
traffic is processed only if specifically addressed to a single recipient
define:
when is broadcast traffic often used?
- host needs to discover the address of another host
- host needs to autoconfigure its own address
- when routers communicate updates
define:
how are colission domains seperated
bridges
define:
how are colission domains effectively eliminated?
switches
what is the
relationship between collision domain & broadcast domains
1 broadcast domain can contain multiple collision domains
1 collision domain is only associated with only 1 broadcast domain
what is
IP address + Port #
ex: 172.16.16.10 + 21 =
172. 16.16.10:21
socket
what is
2 or more computer systems linked together by a transmission medium that enables them to share information
network
what is a
device that communicates on a network
node
what is a
communication pathway between nodes
link
what is a
local area network
a network in a single location
LAN
what is a
wide area network
networks in different geographical locations but with shared links
WAN
what is a
protocol data unit
header + payload (data) = PDU
PDU
what is a
layer 2 segment that includes multiple phsyical segments
logical topology
what is the
stream of 1s & 0s arriving from the physical layer, organied by layer 2-data link
structured unit
frame
what do you call the
exchange of multiple messages between the client & server
Session
or
Dialog
what
can automatically recover from communication link failures
robust switching protocol
what is
- the range of frequencies available to the communication channel
- also- data rate
bandwidth
what is
the complete bandwidth of the media is available to a single transmission channel
baseband transmission
what is measured by
unit of time called Hertz (Hz)
bandwidth
what is the unit of measurement for the
number of signaling cycles that can be completed per second
hertz
hz
what is the label for the
amount of information that can be transferred per second
data rate
what is the label for the
number of symbols that can be transmitted per second
measured in hertz - MHz or GHz
baud rate
what is the label for the
amount of information that can be transmitted
measured in bits/second
bit rate
what is
loss of signal strength
expressed in dB
attenuation
what is
anything that gets transmitted within or close to the channel that isn’t the intended signal
noise
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
Media Access Control
MAC
what do we call
a central device/system that specifies when & how long each node can transmit
deterministic media access
define:
token ring uses what type of media access?
deterministic media access
what type of access control should you choose when
- when network access is time critical
- all nodes need to get a chance
deterministic media access
what do you call the type of access where
each node in the same collision domain competes
contention based MAC system
what is the label when
all hosts attached to the same cable segment or connected via the same hub
collision domain
which dialog control uses
half-duplex
CSMA dialog control
what access control,
on detecting a collision, the node broadcasts a jam signal. nodes then wait for backoff period before retrying
CSMA/CD
which access control
use “request to send” schemes to gain access tot he media
CSMA/CD
what is the label for when
any given node will receive all the traffic transmitted with that domain
broadcast domain
name for when
traffic is processed only if specifically addressed to a single recipient
unicast
define:
bit
- 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
define:
byte
- 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 ‘$’
define:
SAN =
Storage Area Network