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06b. Comparing LAN Technologies
CompTIA Network+ Comparing LAN Technologies
46
Computer Networking
Professional
03/26/2012

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Cards

Term
The 802.__ standard, called Logical Link Control (LLC), manages data flow control and error control.
Definition
802.2
Term
The 802.__ standards define a range of networking systems based on the original Ethernet standard.
Definition
802.3
Term
Access methods govern how systems access the network ___ and send ___.
Definition
media
data
Term
The most common media access method, defined by the 802.3 (Ethernet) standard is __ __ __ __/__ __.
Definition
Carrier Sense Multiple Access/Collision Detection (CSMA/CD)
Term
On a network that uses the ___ method, when one system wants to send data to another, it first checks to see if the network medium is free (because each network medium in a LAN can carry only one signal at a time).
Definition
Carrier Sense Multiple Access/Collision Detection (CSMA/CD)
Term
___ ___ works by detecting fragments of a transmission that occur when two systems try to talk at the same time. The two systems wait for a random amount of time called the backoff period or jam signal to transmit again.
Definition
Collision detection
Term
CSMA/CD is known as a ___ media access method because systems contend for access to the media.
Definition
contention
Term
The upside of CSMA/CD is that it has relatively low ___. The downside is that as more systems are added to the network, more ___s occur and the network becomes slower.
Definition
overhead
collisions
Term
The low overhead of a CSMA/CD system means that it theoretically can achieve greater speeds than high-overhead systems such as token passing. However, because ___s occur, the chance of all that speed translating into usable bandwidth is relatively low.
Definition
collisions
Term
On a network that uses CSMA/CD, every ___ has equal access to the network media.
Definition
node
Term
A ___ is any device connected to the network (client computer, server computer, printer, router, gateway, etc.)
Definition
node
Term
A ___ ___ is a CSMA/CD workaround that creates multiple collision domains to reduce the impact of collisions on performance.
Definition
network switch
Term
The ___ access method uses a "listen before talking" strategy to avoid collisions on the network.
Definition
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
Term
___ is the access mechanism used in Apple’s LocalTalk network and the 802.11 wireless standards.
Definition
CSMA/CA
Term
The CSMA/CD access method uses a ___ method to signal its intention to transmit data, which can slow down the network.
Definition
broadcast
Term
The ___ LAN standard specifies an Ethernet network that commonly uses unshielded twisted-pair cable but allows shielded twisted pair for decreasing interference and attenuation.
Definition
10BaseT
Term
10BaseT uses ___ transmission and has a maximum physical segment length of ___ meters.
Definition
baseband
100
Term
10BaseT specifies transmission speeds of 10Mbps and can use several categories of ___ cable, including Categories 3, 4, 5, and 6 (all of which use RJ-45 connectors).
Definition
UTP
Term
10BaseT takes advantage of the multiple wires inside twisted-pair cable to create independent ___ and ___ paths, which means that full-duplex mode can be supported.
Definition
transmit
receive
Term
The maximum number of computers supported on a 10BaseT network is ___.
Definition
1,024
Term
All 10BaseT networks use a ___-___-___ network design, with one end of the connection attaching to the network card and the other to a hub or switch.
Definition
point-to-point
Term
10BaseT networks use a physical ___ topology.
Definition
star
Term
Fast Ethernet (also known as ___) is a network design that provides greater speeds than 10BaseT.
Definition
100BaseT
Term
___ transmits network data up to 100Mbps, the speeds at which most LANs operate today.
Definition
100BaseTX
Term
100BaseTX is most often implemented with ___ cable, but it can use ___.
Definition
UTP
STP
Term
100BaseTX uses Category __ UTP cable.
Definition
5
Term
Both ___ and ___ use independent transmit and receive paths to support full-duplex communication.
Definition
10BaseT
100BaseTX
Term
Repeaters are sometimes needed to connect segments that use ___ or ___.
Definition
100BaseTX
100BaseFX
Term
___ is the IEEE standard for running Fast Ethernet over fiber-optic cable.
Definition
100BaseFX
Term
Because fiber is expensive, ___ is largely limited to use as a network backbone.
Definition
100BaseFX
Term
The maximum segment length for ___ is 412 meters with half-duplex multimode fiber and 10,000 meters for full-duplex single-mode fiber.
Definition
100BaseFX
Term
100BaseFX often uses __ or __ fiber connectors.
Definition
SC or ST
Term
Known as Gigabit Ethernet, ___ is another variation on the 802.3 standard and is given its own identifier: 802.3z.
Definition
1000BaseX
Term
___ offers transfer rates of up to 1000Mbps.
Definition
1000BaseX
Term
Both ___ and ___ are laser standards used over fiber.
Definition
1000BaseSX
1000BaseLX
Term
SX refers to ___ wavelength laser, and LX refers to ___ wavelength laser.
Definition
short
long
Term
Only LX wave lasers support the use of ___-___ fiber.
Definition
single-mode
Term
___ uses shielded copper wire instead of fiber and is restricted to a maximum cable length of 25 meters.
Definition
1000BaseCX
Term
___ is a Gigabit Ethernet standard given the IEEE 802.3ab designation.
Definition
1000BaseT
Term
The 802.3ab standard specifies Gigabit Ethernet over Category __ UTP cable.
Definition
5
Term
___ provides data transmission rates of up to 10 gigabits per second.
Definition
10 Gigabit Ethernet (10GbE)
Term
Designed primarily as a WAN and MAN connectivity medium, ___ is the IEEE 802.3ae standard.
Definition
10 Gigabit Ethernet (10GbE)
Term
The ___ specification includes a serial interface referred to as 10GBaseS (the S stands for short wavelength) that is
designed for transmission on multimode fiber.
Definition
10 Gigabit Ethernet (10GbE)
Term
___SR/SW is designed for LAN or MAN implementations, with a maximum distance of 300 meters using 50-micron multimode fiber cabling.
Definition
10GBaseSR/SW
Term
The ___LR/LW Ethernet standards offer greater distances using single-mode fiber.
Definition
10GBaseLR/LW
Term
The 802.3__ standard brings 10-gigabit speed to regular copper cabling by facilitating an upgrade from 1000-gigabit networking to 10-gigabit networking using the current wiring infrastructure.
Definition
an
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