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39
Computer Networking
Not Applicable
05/24/2021

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Term
3G
Definition
Third-generation wireless data standard for cell phones and other mobile devices. 3G matured over time until Evolved High-Speed Packet Access (HSPA+) became the final wireless 3G data standard. It transferred at theoretical maximum speeds up to 168 megabits per second (Mbps), although real-world implementations rarely passed 10 Mbps.
Term
4G
Definition
Most popularly implemented as Long Term Evolution (LTE), a wireless data standard with theoretical download speeds of 300 Mbps and upload speeds of 75 Mbps.
Term
4to6
Definition
Internet connectivity technology that encapsulates IPv4 traffic into an IPv6 tunnel to get to an IPv6-capable router.
Term
6in4
Definition
An IPv6 tunneling standard that can go through IPv4 Network Address Translation (NAT).
Term
6to4
Definition
An IPv6 tunneling protocol that doesn’t require a tunnel broker. It is generally used to directly connect two routers because it normally requires a public IPv4 address.
Term
8 position 8 contact (8P8C)
Definition
Four-pair connector used on the end of network cable. Erroneously referred to as an RJ-45 connector.
Term
10 Gigabit Ethernet (10 GbE)
Definition
A very fast Ethernet designation, with a number of fiber-optic and copper standards.
Term
10Base2
Definition
The last true bus-standard network where nodes connected to a common, shared length of coaxial cable.
Term
10BaseFL
Definition
Fiber-optic implementation of Ethernet that runs at 10 Mbps using baseband signaling. Maximum segment length is 2 km.
Term
10BaseT
Definition
An Ethernet LAN designed to run on UTP cabling. Runs at 10 Mbps and uses baseband signaling. Maximum length for the cabling between the NIC and the hub (or the switch, the repeater, and so forth) is 100 m.
Term
10GBaseER/10GBaseEW
Definition
A 10 GbE standard using 1550-nm single-mode fiber. Maximum cable length up to 40 km.
Term
10GBaseLR/10GBaseLW
Definition
A 10 GbE standard using 1310-nm single-mode fiber. Maximum cable length up to 10 km.
Term
10GBaseSR/10GBaseSW
Definition
A 10 GbE standard using 850-nm multimode fiber. Maximum cable length up to 300 m.
Term
10GBaseT
Definition
A 10 GbE standard designed to run on Cat 6a UTP cabling. Maximum cable length of 100 m.
Term
66 block
Definition
Patch panel used in telephone networks; displaced by 110 blocks in networking.
Term
100BaseFX
Definition
An Ethernet LAN designed to run on fiber-optic cabling. Runs at 100 Mbps and uses baseband signaling. Maximum cable length is 400 m for half-duplex and 2 km for full-duplex.
Term
100BaseT
Definition
An Ethernet LAN designed to run on UTP cabling. Runs at 100 Mbps, uses baseband signaling, and uses two pairs of wires on Cat 5 or better cabling.
Term
100BaseT4
Definition
An Ethernet LAN designed to run on UTP cabling. Runs at 100 Mbps and uses four-pair Cat 3 or better cabling. Made obsolete by 100BaseT.
Term
100BaseTX
Definition
The technically accurate but little-used name for 100BaseT.
Term
110 block
Definition
Also known as a 110-punchdown block, a connection gridwork used to link UTP and STP cables behind an RJ-45 patch panel.
Term
110-punchdown block
Definition
The most common connection used on the back of an RJ-45 jack and patch panels.
Term
802 committee
Definition
The IEEE committee responsible for all Ethernet standards.
Term
802.1X
Definition
A port-authentication network access control mechanism for networks.
Term
802.3ab
Definition
The IEEE standard for 1000BaseT.
Term
802.3z
Definition
The umbrella IEEE standard for all versions of Gigabit Ethernet other than 1000BaseT.
Term
802.11a
Definition
A wireless standard that operates in the frequency range of 5 GHz and offers throughput of up to 54 Mbps.
Term
802.11ac
Definition
A wireless standard that operates in the frequency range of 5 GHz and offers throughput of up to 1 Gbps.
Term
802.11a-ht
Definition
Along with the corresponding 802.11g-ht standard, technical terms for mixed mode 802.11a/802.11g operation. In mixed mode, both technologies are simultaneously supported.
Term
802.11b
Definition
The first popular wireless standard, operates in the frequency range of 2.4 GHz and offers throughput of up to 11 Mbps.
Term
802.11g
Definition
Older wireless standard that operates on the 2.4-GHz band with a maximum throughput of 54 Mbps. Superseded by 802.11n.
Term
802.11g-ht
Definition
Along with the corresponding 802.11a-ht standard, technical terms for mixed mode 802.11a/802.11g operation. In mixed mode, both technologies are simultaneously supported.
Term
802.11i
Definition
A wireless standard that added security features.
Term
802.11n
Definition
An 802.11 standard that increases transfer speeds and adds support for multiple in/multiple out (MIMO) by using multiple antennas. 802.11n can operate on either the 2.4- or 5-GHz frequency band and has a maximum throughput of 400 Mbps. Superseded by 802.11ac.
Term
1000BaseCX
Definition
A Gigabit Ethernet standard using unique copper cabling, with a 25-m maximum cable distance.
Term
1000BaseLX
Definition
A Gigabit Ethernet standard using single-mode fiber cabling, with a 5-km maximum cable distance.
Term
1000BaseSX
Definition
A Gigabit Ethernet standard using multimode fiber cabling, with a 220- to 500-m maximum cable distance.
Term
1000BaseT
Definition
A Gigabit Ethernet standard using Cat 5e/6 UTP cabling, with a 100-m maximum cable distance.
Term
1000BaseTX
Definition
Short-lived gigabit-over-UTP standard from TIA/EIA. Considered a competitor to 1000BaseT, it was simpler to implement but required the use of Cat 6 cable.
Term
1000BaseX
Definition
An umbrella Gigabit Ethernet standard. Also known as 802.3z. Comprises all Gigabit standards with the exception of 1000BaseT, which is under the 802.3ab standard.
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