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| American National Standard Institute; comprised of individuals from the industry and government. |
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| Electronic Industry Alliance |
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| Telecommunications Industry Association |
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| Institute of Electrical & Electronics Engineering |
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| International Organization for Standardization |
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| Internet Assigned Numbers Authority |
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| Open Systems Interconnection Model; divides network communication products into seven layers |
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| Name the seven network layers (Programmers Do Not Throw Sausage Pizza Away "PDNTSPA") |
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Definition
| Application; Presentation; Session; Transport; Network; Data Link; Physical |
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| What does the APPLICATION LAYER of a network do? |
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Definition
| Provides protocol that allows the network to interact with applications; HTTP, FTP, SCP, SSH, SSL, TFTP; interacts with the presentation layer. |
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| What does the PRESENTATION LAYER of a network do? |
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Definition
| Accepts application layer data and formats it so that one type of application from one host can understand data from another host with a different application; does encryption, compression / compressing files. |
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| What does the SESSION LAYER of a network do? |
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Definition
| Coordinates and maintains communication between two nodes on the network. A session is an on-going data transfer process between two nodes. Each time a new session is opened you are given a specific number that differentiates one session from another and helps maintain your connection. |
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| What does the TRANSPORT LAYER of a network do? |
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| Ensures that data is delivered in order and reliably |
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| What does the NETWORK LAYER of a network do? |
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Definition
| Translates IP addresses into their physical counterparts (MAC addresses); routes data (packets) from source to destination. |
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| What does the DATA LINK LAYER of a network do? |
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Definition
| Takes data from the physical layer and allows the network layer to understand it; transforms/takes packets from the network layer into frames to be passed to the physical layer (adds their physical addresses). |
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| What does the PHYSICAL LAYER of a network do? |
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Definition
| Accepts frames from the data link layer and turns them into bits (physical frames -> bits -> electrical signals -> voltage). |
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| In networking, what does the term 'transmit' mean? |
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Definition
| To issue signals to the network medium. |
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| The process of transmitting signals. |
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| What are the two ways of transmitting network signals? |
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| Time Division Multiplexing (STDM [Statistical] is more effective than TDM) |
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| What is the definition of 'throughput'? |
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Definition
| How data is actually sent over a period of time. |
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Term
| When referring to noise in networking, what does 'EMI' mean? What does 'RFI' mean? |
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Definition
| Electromagnetic Interference; Radio Frequency Interference |
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| An amplifier is a(n): (a) analog signal, (b) digital signal |
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Definition
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| A repeater is a(n): (a) analog signal, (b) digital signal |
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| When referring to thicknets, "10 base 5" means what? |
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Definition
| "Speed, technology, distance"; "10mbps, baseband, how far you can go before needing a repeater (500m)" |
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| Thinnet is: (a) 10 base 2, (b) 10 base 3, (c) 10 base 5, (d) 100 base 7 |
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Definition
| Shielded Twisted Pair; more expensive and provides a greater protection against network noise |
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Definition
| Unshielded Twisted Pair; less expensive and is more vulnerable to network noise |
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| STP and USTP can both reach speeds between what range? |
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Definition
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Term
| What is '10 base T' and what rule does it follow? |
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Definition
| 10Mbps, baseband, twisted pair; follows the '5-4-3 rule' (fast Ethernet) |
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| 1000 base T is referred to as what? |
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Definition
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| What is 10 base F1 used for and what is its maximum distance? |
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Definition
| It is used to connect workstations to a LAN or two repeaters; maximum distance is 1000m |
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| 10 base F is what mode and duplex? What is it mostly used for? |
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Definition
| Multimode; full duplex; mostly used for backbone |
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Term
| What is the '5-4-3 rule'? |
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Definition
| No more than five (5) network segments connected by four (4) repeaters and no more than three (3) can be connected. |
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| Fiber-optic Cable uses what medium to send data? |
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Definition
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| Name three advantages to using fiber-optic cables |
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Definition
| Able to carry signals for much longer distances before requiring a repeater; nearly unlimited bandwidth; much higher resistance to network noise (no EMI) |
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| SMF has how many mods? How many signals does it send? What is it used for? |
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Definition
| Single mod; sends one signal; used for WANs |
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| What is MMF? How many mods does it have? How many signals does it send? What is it used for? |
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Definition
| Multiple mod; sends multiple signals, used for LANs |
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Term
| What is the networking definition of 'bend radius'? |
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Definition
| How far a fiber-optic cable can be stretched before impairing data transmission. |
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Term
| 1000 base LX is a type of fiber-optic cable. Does it have a long or short wavelength? How long is the wavelength? What type of network is this type of cable used for? |
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Definition
| Long wavelength; 550m; WAN |
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| 1000 base SX is a type of fiber-optic cable. Does it have a long or short wavelength? How long is the wavelength? |
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Definition
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| What does a 'straight through cable' mean? |
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Definition
| Connections coming in will go out the same way. |
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Term
| In wireless networking, radio frequencies (RFs) can be what three types of waves? |
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Definition
| Infrared, microwave, sattelite. |
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Term
| Radio frequencies use what as a medium? |
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Definition
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| True or False: Radio frequencies travel in specific paths |
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Definition
| False, there is no specific path a radio wave takes |
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| What is an antenna used for? |
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Definition
| To send wireless signals through the air |
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Term
| What type of communication is a directional antenna used for? |
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Definition
| Point-to-point communication |
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| What is an omni-directional antenna used for? |
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Definition
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| When discussing antennas and wireless systems, what is the definition of 'range'? |
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Definition
| The geographical area an antenna or wireless system can reach |
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| In the wireless spectrum, what can be found between 9KHz to 100KHz? |
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Definition
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| In the wireless spectrum, what is found between 100KHz to 1MHz? |
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Definition
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| In the wireless spectrum, what is found between 10MHz and 100MHz? |
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Definition
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| In the wireless spectrum, what is found from 100MHz to 1GHz? |
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Definition
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| Why is reflection used in fiber-optic cables and other forms of network data transmission? |
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Definition
| For transmitting/bouncing objects towards their destination |
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