CTP TT0-101 Study Note
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2007-12-30
03:38:04
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CTP Notes
1
Institute of Electrical and Electronics Engineers (IEEE)
IEEE 802.1 Internetwork The main focus of the specification is LANs with optimization in bridging and
switching. It defines the relationship between 802 standards and other reference models in
telecommunications. The IEEE 802.1P and 802.1Q standards define how Ethernet switches can
classify traffic in order to expedite delivery of time-critical transmissions. By using 3 bits for
precedence, IP has the same eight levels of prioritization, 0 through 7, as 802.1P, 802.1Q and
most of the other LAN standards. By implementing a cross-mapping service, it becomes feasible
to provide a one-to-one mapping between 802.1Q Ethernet frames and the IP precedence, letting
you build a network that carries prioritization from one Ethernet LAN to another across an IP-
based WAN or ISP connection.
IEEE 802.1P: prioritize network traffic at the MAC sublayer of the OSI data link layer by adding
priority messages to packet frame headers.
IEEE 802.1Q: implement in VLANS: prioritizes network traffic by appending a tag to a MAC frame.
This VLAN tag carries VLAN data into two parts: the 12 bit VLAN ID and the 3-bit
priortization field.
IEEE 802.2 Logical Link Control: provides connection to lower-layer Media Access Control (MAC).
IEEE 802.3 CSMA/CD and Ethernet
10Base-2: thinnet coaxial cable
10Base-5: thicknet coaxial cable
10 Base-F: fiber-optic lines
10 Base-T: twisted-pair wire.
100BASe-TX: two-pair wire.
100BASE-T4: four-pair wire.
100BASE-FX: fiber-optic lines.
IEEE 802.3ab: 1000BASE-T: use all 8 pins of USOC/RJ-45 connector.
IEEE 802.3ae: 10 gigabit Ethernet.
IEEE 802.3ah: 100BASE-FX.
IEEE 802.3u: fast ethernet
IEEE 802.3z : gigabit ethernet.
IEEE 802.5 Token Ring Network.
IEEE 802.6 Metropolitan Area Network: using Distributed Queue Dual Bus (DQDB):
part of Switched Multimegabit Data Services (SMDS).
IEEE 802.9 Integrated Data and Voice Networks.
IEEE 802.11 Wireless LANs, CDMA/CA.
IEEE 802.11: 1-Mbps or 2 Mbps in 2.4 GHz band using FHSS or DSSS.
IEEE 802.11a: 54 Mbps in 5HHz using FDM.
IEEE 802.11b: High Rate: 11 Mbps in 2.4 GHz. Using DSSS: WLAN.
IEEE 802.11g: 20+Mbps in 2.4 GHz band.
IEEE 802.12 100 VG-AnyLAN
IEEE 802.14 Cable Modem.
IEEE 1284: Parallel ports.
IEEE 1394: FireWire
IEEE 1394b: FireWire: 400 MB/sec.
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