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networking A
chapter 1 thru 4
| Question | Answer |
|---|---|
| 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
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