901-2 Flashcards
What is fiber cable
containing one or more optical fibers that are used to carry light.
What is a ST fiber connector
It has a bayonet mount and a long cylindrical 2.5 mm ceramic (usually) or polymer ferrule to hold the fiber.
What is a SC fiber connector
SC is a snap-in connector also with a 2.5 mm ferrule that is widely used for it’s excellent performance. It was the connector standardized in TIA-568-A, but was not widely used at first because it was twice as expensive as a ST.
What is a LC fiber connector
small form factor connector that uses a 1.25 mm ferrule, half the size of the SC.
What is RJ-11
A telephone interface that uses a cable of twisted wire pairs and a modular jack with two, four or six contacts. . Can hold six wires for up to three telephone lines
What is RJ-45
A common data networking interface that employs a cable of twisted wire pairs and an 8-pin modular jack.
What is the order of T568a
g | G | o | B | b | O | br | Br
What is the order of T568b
o | O | g | B | b | G | br | Br
What is a BNC connector
miniature quick connect/disconnect radio frequency connector used for coaxial cable. It features two bayonet lugs on the female connector; mating is fully achieved with a quarter turn of the coupling nut.
What is a F-connector
commonly used for “over the air” terrestrial television, cable television and universally for satellite television and cable modems
What are the characteristics of Single Mode fiber
commonly used for “over the air” terrestrial television, cable television and universally for satellite television and cable modems. single-mode fibers can have a higher bandwidth and longer distances
What are the characteristics of Multi-Mode Fiber
mostly used for communication over short distances, such as within a building or on a campus. Typical multi-mode links have data rates of 10 Mbit/s to 10 Gbit/s over link lengths of up to 600 meters (2000 feet).
What is STP
Sheilded Twisted Pair, protects industrial settings with high amounts of electromagnetic interference
What is UTP
Unshielded Twisted Pair, common cables
What are the characteristics of CAT3
carry data speeds of up to 10 megabits per second (mbps), used for longer runs, up to 300 feet (100 meters)
What are the characteristics of CAT5
can handle 10/100 Mbps speeds (Fast Ethernet) at up to 100 MHz bandwidth
What are the characteristics of CAT5e
better at keeping signals on different circuits or channels from interfering with each other. A step above Cat 5, it can handle 1000 Mbps speeds (gigabit Ethernet) at 100 MHz.
What are the characteristics of CAT6
up to 10 gigabit Ethernet at 250 MHz
Why use plenum cables
To reduce fire hazard when running cable in walls and ceilings. It is jacketed with a fire-retardant plastic jacket
What is the difference between a splitter, hub, and switch
SPLITTER = Splitter will use 1 incoming to 2 outgoing or vice versa., no additional power required, 200 MB/s limit HUBS = hubs repeat all of the network traffic that is sent to them. hogs bandwidth, slowing down the network SWITCH = most expensive of the three, able to figure out which devices are trying to connect to each other and connect just those two
What is the purpose of a coaxial cable
used for carrying lower-frequency signals, in that the dimensions of the cable are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a transmission line.
What are disadvantages of coaxial cable
More expensive, and harder to work with
What is IPv4
A connectionless protocol for use on packet-switched networks. It operates on a best effort delivery model, in that it does not guarantee delivery, nor does it assure proper sequencing or avoidance of duplicate delivery. These aspects, including data integrity, are addressed by an upper layer transport protocol, such as the Transmission Control Protocol (TCP).
- 32-bit addresses
What is IPv6
Closely adhering to the design principles in IPv4
simplifies processing of packets in routers by placing the responsibility for packet fragmentation into the end points.
- Length of an IPv6 address is 128 bits
What is the range of Class A IPv4?
0.0.0.0 to 127.255.255.255
What is the range of Class B IPv4
128.0.0.0 to 191.255.255.255
What is the range of Class C IPv4
192.0.0.0 to 223.255.255.255
What is the range of Class D IPv4
224.0.0.0 to 239.255.255.255
