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NCTI Field Tech III Question and answers already passed 2023
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NCTI Field Tech III - IV conventional100basefx - correct answer A 100BaseT variant that runs over fiber-optic cabling.
100BaseFX is generally used for high-speed local area network (LAN) backbones.
100baseT - correct 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 - correct 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 - correct 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 - correct 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) - correct 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 - correct 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) - correct 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) - correct 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 - correct 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) - correct answer A brouter is an internet working device that
combines the functions of both a bridge and a router. See router.
broadcast - correct 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 - correct 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 - correct 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 - correct 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.
Domain Name System (DNS) - correct answer In a transmission control
protocol/Internet protocol (TCP/IP) network, a user can communicate with another user
by specifying a name, such as johnd@engr.company.com. Internet protocol (IP)
requires Internet addresses for messages, thus one must be translated to the other.
This is the job of the DNS service; given a name, it returns an IP address or given, an IP
address, DNS will look for the host name.
Dynamic Host Configuration Protocol (DHCP) - correct answer Provides configuration
parameters to Internet hosts. It consists of two components: a protocol for delivering
host-specific configuration parameters from a DHCP server to a host, and a mechanism
for allocation of network addresses to hosts. DHCP is built on a client/server model,
where designated DHCP servers allocate network addresses and deliver configuration
parameters to dynamically configured clients.
Ethernet - correct answer This technology, originally developed in the 1970s by Xerox
Corporation in conjunction with Intel and Digital Equipment Corporation (DEC), is now
the primary medium for local area networks (LAN). The original Ethernet operated at 10
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