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NCTI Field Tech III - IV conventional
NCTI Field Tech III - IV conventional
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NCTI Field Tech III - IV conventional100basefx - Answer A 100BaseT variant that runs over fiber-optic cabling.
100BaseFX is generally used for high-speed local area network (LAN) backbones.
100baseT - Answer Based on the standard from Institute of Electrical and
Electronic Engineers (IEEE) 802.3 Ethernet and uses twisted-pair cabling, as does
10BaseT Ethernet. However, 100BaseT runs 10 times faster than 10Base2 and
10Base5, at 100 megabits per second (Mbps).
10base2 - Answer Also known as Thinnet, one of several physical cabling
standards from Institute of Electrical and Electronic Engineers (IEEE) for IEEE 802.3
Ethernet networks. 10Base2 uses thin RG-58A/U coaxial cabling for connecting
nodes on a bus topology, as does 10Base5.
10base5 - Answer also known as Thicknet, 10Base5 was the original Ethernet
cabling standard. It is called Thicknet because it uses a coaxial cable approximately
0.4 inch thick.
10baseT - Answer One of several physical cabling standards for IEEE 802.3
Ethernet local area networks (LAN). 10BaseT networks use twisted pair cabling for
connecting nodes in a star topology.
address resolution protocol (ARP) - Answer The protocol used by transmission
control protocol/Internet protocol (TCP/IP) for address resolution. Address
resolution refers to the ability of a station to resolve another station's media
access control (MAC) (hardware) address given its Internet protocol (IP) address.
appletalk - Answer Was Apple's proprietary, seven-layer, peer-to-peer
network communications protocol for Macintosh networks. AppleTalk ran on
Apple network topologies, as well as over Ethernet and Token Ring networks.
asynchronous transfer mode (ATM) - Answer A cell-switching network that
consists of multiple ATM switches that forward each individual cell to its final
destination. ATM can provide transport services for audio, data, and video.
, Bootstrap Protocol (BOOTP) - Answer Described in RFC (Request for
Comments) 951, is a method in which a diskless workstation or terminal can
obtain an Internet protocol (IP) address from a BOOTP server.
bridge - Answer A hardware device that connects local area networks (LAN). It
can be used to connect LANs of the same type or LANs with different types of
medias. A bridge operates at the Data Link Layer (Layer 2) of the Open Systems
Interconnection reference model (OSI/RM).
bridge router (brouter) - Answer A brouter is an internet working device that
combines the functions of both a bridge and a router. See router.
broadcast - Answer The term broadcast is used in several different ways in
communications and networking. With respect to local area networks (LAN), the
term refers to information (that is, frames) sent to all devices on the physical
segment. For example, a bus topology, in which a common cable is used to
connect devices, is considered a broadcast technology. Another common use of
the term broadcast relates to frames. Broadcast frames contain a special
destination address that instructs all devices on the network to process the frame.
checksum - Answer s computed by the number of bits in a transmitted unit of
data. A checksum is appended to a data unit as a simple error-detection method.
The receiving node counts the data bits and compares the result to the checksum
to see whether all bits have arrived. If the numbers match, the transmission was
likely complete. Ethernet, Internet protocol (IP), transmission control protocol
(TCP) and user datagram protocol (UDP) provide checksum count and verification.
collision - Answer Occurs in an Ethernet network when two frames are put
onto the physical medium at the same time and overlap fully or partially. When a
collision occurs, the data on the physical segment is no longer valid.
datagram - Answer Also known as a or packet, is a unit of information
processed by the Network Layer of the Open Systems Interconnection reference
model (OSI/RM). The packet header contains the logical (network) address of the
destination node. Intermediate nodes forward a packet until it reaches its
destination. A packet can contain an entire message generated by higher Open
Systems Interconnection (OSI) layers or a segment of a much larger message.
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