425803
Description
Mind Map by Joshua Snider, updated more than 1 year ago
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Created by Joshua Snider
over 10 years ago
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Ch-4: Ethernet Communications
- Networking Basics
- uses MAC address to
communicate on a LAN from
host to host
- Uses name resolution
- broadcasts asking for
info (all f's for MAC)
- broadcasts asking for
info (all f's for MAC)
- uses MAC address to
communicate on a LAN from
host to host
- Ethernet Basics
- def=contention based
media access method that
allows all host on a
network to share the same
bandwith of a link
- collision domain=area of
network where collision
events are
possible-where every
host must pay attention
- broadcast domain=area of
network where a broadcast
would reach-normally
delineated by switches,
hubs, etc.
- CSMA/CD=carrier sense
multiple access collision
detection=a protocol for
avoiding packet collisions=
- monitor segment, if collision event, then all hosts
stop transmitting for a while, then
free-for-all to transmit
- monitor segment, if collision event, then all hosts
stop transmitting for a while, then
free-for-all to transmit
- half-duplex=one pair of wires
for transmitting or receiving.
30-40% efficient
- full-duplex=two pairs of wire, supposed to be
100% efficient, uses point-to-point
communication, requires dedicated switch port
- switch to host, switch to switch,
host to host (using crossover)
- switch to host, switch to switch,
host to host (using crossover)
- def=contention based
media access method that
allows all host on a
network to share the same
bandwith of a link
- Physical Layer
- EIA/TIA required
ethernet use RJ-45
connection
- inherent attenuation measured in decibals
- crosstalk
- 802.3=ethernet LAN
- 802.3u=FastEthernet
- 802.3ab=Gigabit Ethernet on Cat 5+
- 802.3ae=Gigabit over fiber/coax
- 802.3ae=Gigabit over fiber/coax
- 802.3ab=Gigabit Ethernet on Cat 5+
- 802.3u=FastEthernet
- 10Base2=10Mbps, coax, thinnet, 185m, BNC connector
- 10Base5=10Mbps, coax, thicknet, 500m
- 10BaseT=10Mbps, Cat3, 100m, phys star logic bus
- 100BaseTX=FastEthernet, 100Mbps, Cat3+, 100m
- 100BaseFX=mm fiber, 100Mbps,
- 1000BaseCX=twinax (double coax), 1Gbps, 25m
- 1000BaseT=Cat 5 UTP, 4 pair, 100m, 1Gbps
- 1000BaseSX=mm fiber, 1Gbps, max 550m
- 1000BaseLX=sm fiber, max 10km, 1Gbps
- 10GBaseT=10Gbps, Cat 5e+, economical
- 10GBaseSR=mmfiber, 300m, 10Gbps
- 10GBaseLR=smfiber, 10km, 10Gbps
- 10GBaseER=smfiber, 40km, 10Gbps
- 10GBaseSW=mmfiber, used with SONET, 300m
- 10GBaseLW=smfiber, 10km, SONET
- 10GBaseEW=40km, smfiber, SONET
- 10GBaseEW=40km, smfiber, SONET
- 10GBaseLW=smfiber, 10km, SONET
- 10GBaseSW=mmfiber, used with SONET, 300m
- 10GBaseER=smfiber, 40km, 10Gbps
- 10GBaseLR=smfiber, 10km, 10Gbps
- 10GBaseSR=mmfiber, 300m, 10Gbps
- 10GBaseT=10Gbps, Cat 5e+, economical
- 1000BaseLX=sm fiber, max 10km, 1Gbps
- 1000BaseSX=mm fiber, 1Gbps, max 550m
- 1000BaseT=Cat 5 UTP, 4 pair, 100m, 1Gbps
- 1000BaseCX=twinax (double coax), 1Gbps, 25m
- 100BaseFX=mm fiber, 100Mbps,
- 100BaseTX=FastEthernet, 100Mbps, Cat3+, 100m
- 10BaseT=10Mbps, Cat3, 100m, phys star logic bus
- 10Base5=10Mbps, coax, thicknet, 500m
- EIA/TIA required
ethernet use RJ-45
connection
- Data Link Layer
- responsible for hardware addressing and
framing packets in prep for transmission
- binary number=byte of 1's and 0's. values are 128,64,32,16,8,4,2,1 with value being adding all
of the enabled spots.. decimal=regular numbers. hex=0-9 are regular, a=10,
b=11,c=12,d=13,e=14,f=15, hex number is 0x or h then two values. convert from binary to hex
by dividing into nibbles and changing value of nibble to hex value
- MAC address=burned into NIC
- first 24 bits are OUI (organizationally unique id)
second 24 bits are vendor specific
- of OUI,1st bit=I/G(individual group), if 0 it's a device, if 1
it's an ethernet broadcast. 2nd bit=G/L(global/local), if 0 it's
globally admin'd, if 1 it's locally admin'd.
- of OUI,1st bit=I/G(individual group), if 0 it's a device, if 1
it's an ethernet broadcast. 2nd bit=G/L(global/local), if 0 it's
globally admin'd, if 1 it's locally admin'd.
- first 24 bits are OUI (organizationally unique id)
second 24 bits are vendor specific
- Ethernet stations pass data frames between each other
using a group of bits known as a MAC FRAME FORMAT.
This provides error detection from a cyclic redundancy check
(CRC)
- Channel bonding is a computer-networking arrangement where
two or more network interfaces on a host are combined for
redundancy and/or increased throughput
- aka Link Aggregation or Cisco=EtherChannel
- switch to server, switch to switch, or
switch/router to ISP
- aka Link Aggregation or Cisco=EtherChannel
- responsible for hardware addressing and
framing packets in prep for transmission
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