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Chapter 5
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71
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Undergraduate 3
03/28/2012

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Term
10-GBase-T
Definition
A physical layer standard for achieving 10-Gbps data transmission over twisted pair cable. Described in its 2006 standard 802.3an, IEEE specifies Cat6 or Cat 7 cable as the appropriate medium for 10GBase-T. The maximum segment length for 10GBase-T is 100 meters
Term
1000Base-LX
Definition
A physical layer standard for networks that specifies 1-Gbps transmission over fiber optic cable using baseband transmission. 1000Base-LX can run on either single-mode or multimode fiber. The LX represents its reliance on long wavelength of 1300 nanometers. 1000Base -LX can extend to 5000-meter segment length using single mode, fiber optic cable. 1000Base-LX networks can use one repeater between segments.
Term
1000Base-SX
Definition
A physical layer standard for networks that specifies 1-Gbps transmission over fiber optic cable using baseband transmission. 1000Base-SX runs on multimode fiber. Its maximum segment length is 550 meters. The SX represents its reliance on short wavelength s of 850 nanometers. 1000Base-SX can use one repeater
Term
1000Base-T
Definition
A physical layer standard for achieving 1 Gbps over UTP, 1000Base-T achieves its higher throughput by using all four pairs of wires in a Cat 5 or higher twisted pair cable to both transmit and receive signals. 1000Base-T also uses a different data encoding scheme than that used by other UTP physical layer specifications
Term
100Base-FX
Definition
A physical layer standard for networks that specifies baseband transmission, multimode fiber cabling, and 100-Mbps throughput. 100Base-Fx networks have a maximum segment length of 2000 meters. 100Base-FX may also be called Fast Ethernet.
Term
100Base-T
Definition
A physical layer standard for networks that specifies baseband transmission, twisted pair cabling and 100-Mbps thoughput. 100Base-T networks have a maximum segment length of 100 meters and use the star topology. Also known as Fast Ethernet
Term
100Base-TX
Definition
A type of 100Base-T network that uses two wire pairs in a twisted pair cable, but uses faster signaling to achieve 100-Mbps throughput. It is capable of full duplex transmission and requires Cat 5 or higher twisted pair media
Term
100Base-TX
Definition
Has a Maximum Distance per Segment length of 100 meters
Term
10Base-T
Definition
A physical layer standard for networks that specifies baseband transmission, twisted pair media, 10-Mbps throughput. 10Base-T networks have a maximum segment length of 100 meters and rely on star topology
Term
10GBase-ER
Definition
A physical Layer standard for achieving 10-Gbps data transmission over single mode fiber optic able. In 10GBase-ER, the ER stands for extended reach. This standard specifies a star topology and segment lengths up to 40 Kilometers.
Term
10GBase-EW
Definition
Has a Maximum Distance per Segment length of 40,000 meters.
Term
10GBase-EW
Definition
A variation of the 10GBase-ER standard that is specially encoded to operate over SONET WAN links
Term
10GBase-LR
Definition
A physical layer standard for the achieving 10-Gbps data transimission over single mode, fiber-optic cable using wavelengths of 1310 nanometers. In 10GBase-LR, the LR stands for long reach. This standard specifies a star topology and segment up to 10 kilometers
Term
10GBase-LW
Definition
A variation of the 10-GBase-LR standard that is specially encoded to operate over SONET WAN links
Term
10GBase-LW
Definition
Has a Maximum Distance per Segment length of 10,000 meters.
Term
10GBase-SR
Definition
A physical layer standard for achieving 10-Gbps data transmission over multitude fiber using wavelength of 850 nanometers. The maximum segment length for 10GBase-SR can reach up to 300 meters, depending on the fiber core diameter and modal bandwidth used
Term
10GBase-SW
Definition
A variation of the 10GBase-SR standard that is specially encoded to operate over SONET WAN links
Term
5-4-3 Rule
Definition
A guideline for 10-Mbps Ethernet networks stating that between two communicating nodes, the network cannot contain more than five network segments connected by four repeating devices and no more than three of the segments may be populated
Term
802.3ab
Definition
The IEEE standard that describes 1000Base-T, a 1-Gigabit Ethernet technology that runs over four pairs of Cat 5 or better cable
Term
802.3ae
Definition
The IEEE standard that describes 10-Gigabit ethernet technologies, including 10GBase-SR, 10GBase-SW, 10GBase-LR, 10GBase-LW, 10GBase-ER and 10-GBase-EW
Term
802.3af
Definition
The IEEE standard that specifies a way of suplying electrical Power over Ethernet (PoE). 802.3af requires Cat 5 or better UTP or STP cabling and uses power sourcing equipment to supply current over a wire pair to powered devices PoE is compatible with existing 10Base-T, 100Base-TX, 1000Base-T, and 10GBase-T implementation
Term
802.3an
Definition
The IEEE standard published in 2006 that describes 10GBase-T, a 10-Gbps ethernet technology that runs on Cat 6 or cat 7 twisted pair of cable
Term
802.3u
Definition
The IEEE standard that describes fast Ethernet technologies including 100Base-TX
Term
802.3z
Definition
The IEEE standard that describes 1000Base or 1 gigabit ethernet technologies, including 1000Base-LX and 1000Base-SX
Term
Access Method
Definition
A network's method of controlling how nodes access the communications channel.
Term
Active Topology
Definition
A topology in which each workstation participates in transmitting data over the network.
Term
Broadcast Domain
Definition
Logically grouped network nodes that can communicate directly via broadcast transmission. For example, all nodes connected to a single hub and all nodes that participate in a bus topology network belong to a single broadcast domain.
Term
Bus
Definition
The single cable connecting all devices in a bus topology
Term
Bus Topology
Definition
Which topology is susceptible to signal bounce?
Term
Bus topology
Definition
A topology in which a single cable connects all nodes on a network without intervening connectivity devices
Term
CSMA/CD
Definition
Carrier Sense Multiple Access with Collision Detection
Term
Cat 3
Definition
What is the minimum cabling standard required for 10Base-T Ethernet.
Term
Cat 6
Definition
What is the minimum cabling standard required for 10GBase-T Ethernet.
Term
Circuit Switching
Definition
A type of switching in which a connection is established between two network nodes before they begin transmitting data.
Term
Collapsed Backbone
Definition
A type of backbone that uses a router or switch as the single central connection point for multiple subnetworks.
Term
Collision
Definition
In Ethernet networks, the interference of one node's data transmission with the data transmission of another node sharing the same segment
Term
Collision
Definition
The interference of one node's data transmission with the data transmission of another node sharing the same segment.
Term
Collision Domain
Definition
The portion of an ethernet network in which collisions could occur if two nodes transmit data at the same time
Term
Daisy Chain
Definition
A group of connectivity devices linked together in a serial fasion.
Term
Daisy chain
Definition
A group of connectivity devices linked together in a serial fashion
Term
Data Propagation Delay
Definition
The length of time data takes to travel from one point on the segment to another point. On Ethernet networks, CSMA/CDs collision detection routine cannot operate accurately if the data propagation delay is too long.
Term
Distributed Backbone
Definition
Consist of a number of connectivity devices connected to a series of central connectivity devices.
Term
Ensure the data is at least 46 bytes
Definition
What is the purpose of padding an Ethernet frame?
Term
Enterprise
Definition
An entire organization, including local and remote offices a mixture of computer systems and a member of departments. Enterprise-wide computing takes into account the breadth and diversity of a large organization
Term
Ethernet
Definition
Which network technology uses packet switching?
Term
Ethernet_II
Definition
The original Ethernet frame type developed by digital, Intel, and Xerox, before the IEEE began to standardize Ethernet. Ethernet_II contains a 2 byte type field to identify the upper layer protocol contained in the frame. It supports TCP/IP and other higher layer protocals
Term
Fast Ethernet
Definition
A type of ethernet network that is capable of 100Mbps throughput. 100Base-T and 100Base-FX are both examples of Fast Ethernet
Term
Fault Tolerance
Definition
The capability for a component or system to continue functioning despite damage or malfunction
Term
Gigabit Ethernet
Definition
A type of Ethernet network that is capable of 1000-Mbps, or 1-Gbps, throughput.
Term
Hybrid Topology
Definition
A physical topology that combines characteristics of more than one simple physical topology.
Term
ISDN
Definition
Which network technology uses circuit switching?
Term
Jamming
Definition
A part of CSMA\CD in which, upon detecting a collision, a station issues a special 32-bit sequence to indicate to all nodes on an ethernet segment that is previously transmitted frame has suffered a collision
Term
Jamming
Definition
A part of CSMA/CD in which, upon detecting a collision, a station issues a special 32-bit sequence to indicate to all nodes on an Ethernet segment that its previously transmitted frame has suffered a collision and should be considered faulty.
Term
Logical Topology
Definition
A characteristics of network transmission that reflects the way in which data is transmitted between nodes(which may differ from the physical layout of the data takes) the most common logical topologies are bus and ring
Term
MPLS
Definition
A type of switching that enables any one of several layer 2 protocols to carry multiple types of layer 3 protocols.
Term
Message Switching
Definition
A type of switching in which a connection is established between two devices in the connection path; one device transfers the data to the second device, then breaks the connection.
Term
Packet Switching
Definition
A type of switching in which data is broken into packets before it is transported.
Term
Padding
Definition
The bytes added to the data (or information) portion of an Ethernet frame to ensure this field is at least 46 bytes in size. Padding has no effect on the data carried
Term
Parallel Backbone
Definition
Most robust type of network backbone
Term
PoE (Power over Ethernet)
Definition
A method of delivering current to devices using Ethernet connection cables.
Term
Preamble
Definition
The field in an Ethernet frame that signals to the receiving node that data is incoming and indicated when the data flow is about to begin.
Term
QoS (Quality of Service)
Definition
The result of specification for guaranteeing data delivery within a certain period of time after transmission.
Term
Ring Topology
Definition
In which topology is each node connected to the next nearest node to form a circle?
Term
Serial Backbone
Definition
Consists of two or more internetworking devices connected to each other by a single cable.
Term
Signal Bounce
Definition
A phenomenon, caused by improper termination on a bus topology network, in which signals travel endlessly between the two ends of the network.
Term
Star Topology
Definition
What type of topology is required for use with a 100Base-TX network?
Term
Star Wired Bus topology
Definition
A hybrid topology in which groups off workstations are connected in a star fashion to hubs that are networked via a single bus
Term
Switching
Definition
A component of a network's logical topology that manages how packets are filtered and forwarded between nodes on the network.
Term
Terminator
Definition
A resistor that is attached to each end of the bus topology network and that causes the signal to stop rather than reflect back toward its source
Term
access method
Definition
A networks method of controlling how nodes access the communications channel. For example, CSMA\CD( Carrier sense multiple access with collision detection) is the access method specified in the IEE 802.3 ethernet standard
Term
switching
Definition
A component of a networks logical topology that manages how packets are filtered and forwarded between node on the networks
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