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networking A

chapter 1 thru 4

QuestionAnswer
bnc a coaxial cable connector.twist and lock style
cat 3 four wire pairs that can carry up to 10mbps, with a possible bandwith of 16 MHZ.
cat 4 four wires that can carry up to 16 mbps,guaranteed up to 20mhz
cat 5 four wires that can carry up to 100 mbps throughput, and a 100 mhz signal rate
cat 5e high quality copper,high twist ratio,reduces cross talk, support a signaling rate of up to 350 mhz
cat 6 four wires each wrapped in foil insulation,foil insulation covers the bundled pairs,fire resistant plastic sheath covers the second foil layer.supports a signaling rate of 250 mhz.
cat 6e capable of 550 mhz, transmit data at multi-gigabit per second, further reduces attentuation and cross talk
cat 7 support up to a 1 ghz signal rate,due to extra layers it is less flexible
cross talk interference caused by signals traveling on nearby wire pairs infringing on anothers pair signal
coaxial cable cable that consists of a central metal conducting core,
crossover cable a twisted pair patch cable in which the termination locations of the transmit and receive wires on one end of the cable are reversed
rg 6 used for tv satellite and broadband cable connections,impedance of 75 ohms
rg 8 impedance of 50 ohm and a 10 awg core, provided the medium for the first ethernet network ,followed the now obselete 10Base-5 standard
rg 58 characterized by a 50 ohm impedance and a 24 awg core,
rg 59 characterized by a 75 ohm impedance and a 20 or 22 awg core, usually made of braided copper
rj 11 registered jack standard connector used with unshielded twisted pair cabling to connect analog phones
registered jack 45 standard connector used with shielded twisted pair and unshielded twisted pair cabling
rollover cable used for serial connections between routers and consoles or other interfaces, terminations at one end are exactly the opposite of the other
statistical multiplexing each node on a network is assigned a seperate time slot for transmission, based on the nodes priority and need
demultiplexer a device that seperates multiplexed signals once they are received and regenerates them in their original form
impedance the resistance that contributes to controlling and electrical signals,measured in ohms.
multiplexer a device that seperates a medium into multiple channels and issues signals to each of those subchannels
multimode fiber a type of fiber optic cable,through which many pulses of light generating by an light emmitting diode led travel at many angles
latency delay between the transmission of a signal and its receipt
modulation a technique for formatting signals in which one property of a simple carrier wave is modified by the addition of a data signal during transmission
throughput the amount of data that a medium can transmit during a given period,usually measure in megabits 1,000,000 bits per second
IPv4 current standard for IP addressing that specifies 32-bit addresses composed of four octets.
IPv6 new IP addresses allows for 128 bit source and destination IP addresses
igmp internet group management protocol
igmp protocols used to manage multicast transmissions, routers use igmp to determine which nodes belong to a multicast group
ip datagram the IP portion of a fram that acts as an envelope for data; holging info necessary for routers to transfer between subnets
subnetting process of subdividing a single class of network into multiple smaller networks
subnet a part of a network in which all nodes share a network addressing component and a fixed amount of bandwith
static IP address an IP address that is manually assigned to a device and remains constant until it is manually changed
resolver a host on the internet that needs to lookup domain name information
routable the protcols that can span more than one LAN because they carry Network layer and addressing info that can be interpreted by the router.
namespace the database of Internet addresses and thei associated names IP addresses. a name server supplies a resolver with the requested info.
PING uses ( ) to send an echo request and a reply ICMP
registered ports are accessible to network users and processes that do not have special admin privileges, ports range from 1024 to 49151
subprotocols work together and belong to a protocol suite
switch the letters or words added to a command that allow you to customize a utilitys output.
ttl time to live
ttl a number that indicates the maximum time that a diagram or packet can remain on the network
Created by: cgeaski