dido:public:ra:1.4_req:2_nonfunc:40_performance:04_nework
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dido:public:ra:1.4_req:2_nonfunc:40_performance:04_nework [2021/06/04 22:18] char [DIDO Specifics] |
dido:public:ra:1.4_req:2_nonfunc:40_performance:04_nework [2021/08/17 13:38] (current) murphy |
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| [[dido:public:ra:xapend:xapend.a_glossary:n:netperform]] captures the statistical metrics and the analytical review of a network. Collectively they reflect the network's Quality of Services. | [[dido:public:ra:xapend:xapend.a_glossary:n:netperform]] captures the statistical metrics and the analytical review of a network. Collectively they reflect the network's Quality of Services. | ||
| - | It is a qualitative and quantitative process that measures and defines the performance level of a given network. It guides a network administrator in the review, measure and improvement of network services. | + | It is a qualitative and quantitative process that measures and defines the [[dido:public:ra:xapend:xapend.a_glossary:p:performance|performance]] level of a given network. It guides a network administrator in the review, measure and improvement of network services. |
| There are two main ways to connect devices together: | There are two main ways to connect devices together: | ||
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| [[dido:public:ra:1.4_req:2_nonfunc:40_performance:04_nework| Return to Top]] | [[dido:public:ra:1.4_req:2_nonfunc:40_performance:04_nework| Return to Top]] | ||
| - | Network speed is for the most part about acquiring the correctly sized physical [[dido:public:ra:xapend:xapend.a_glossary:n:netdev | Network Devices]] (i.e. [[dido:public:ra:xapend:xapend.a_glossary:m:modem]], [[dido:public:ra:xapend:xapend.a_glossary:r:router | Router]], [[dido:public:ra:xapend:xapend.a_glossary:s:switch | Switches]], [[dido:public:ra:xapend:xapend.a_glossary:n:netcabling]], etc.) to meet the demands of the system. However, there are restrictions that arise such as the need for wireless connections (i.e., WiFi, [[dido:public:ra:xapend:xapend.a_glossary:b:bluetooth]], [[dido:public:ra:xapend:xapend.a_glossary:z:zigbee]], [[dido:public:ra:xapend:xapend.a_glossary:i:infrared]] etc.), space and heat considerations (i.e., a big problems for planes, ships, labs, hospital rooms, etc.) or when the assets participating in the system are distributed and not under the control of a single source (i.e., blockchains, Distributed Ledger Technologies (DLT), supply chains, etc.). | + | Network speed is for the most part about acquiring the correctly sized physical [[dido:public:ra:xapend:xapend.a_glossary:n:netdev | Network Devices]] (i.e. [[dido:public:ra:xapend:xapend.a_glossary:m:modem]], [[dido:public:ra:xapend:xapend.a_glossary:r:router | Router]], [[dido:public:ra:xapend:xapend.a_glossary:s:switch | Switches]], [[dido:public:ra:xapend:xapend.a_glossary:n:netcabling]], etc.) to meet the demands of the system. However, there are restrictions that arise such as the need for wireless connections (i.e., WiFi, [[dido:public:ra:xapend:xapend.a_glossary:b:bluetooth]], [[dido:public:ra:xapend:xapend.a_glossary:z:zigbee]], [[dido:public:ra:xapend:xapend.a_glossary:i:infrared]] etc.), space and heat considerations (i.e., a big problems for planes, ships, labs, hospital rooms, etc.) or when the assets participating in the system are distributed and not under the control of a single source (i.e., blockchains, [[dido:public:ra:xapend:xapend.a_glossary:d:distributed_ledgers|Distributed Ledger]] Technologies (DLT), supply chains, etc.). |
| Most [[dido:public:ra:xapend:xapend.a_glossary:e:ethernet]] connections fall into the following categories: [[dido:public:ra:xapend:xapend.a_glossary:w:wired]] and [[dido:public:ra:xapend:xapend.a_glossary:w:wireless]] | Most [[dido:public:ra:xapend:xapend.a_glossary:e:ethernet]] connections fall into the following categories: [[dido:public:ra:xapend:xapend.a_glossary:w:wired]] and [[dido:public:ra:xapend:xapend.a_glossary:w:wireless]] | ||
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| A bit represents a single binary digit either '0' or '1'. The '0' or '1' generally represent yes/no, true/false, on/off, or up/down/ It does not necessarily equate a '0' with false and a '1' with true. When transmitted over a network, the data is sent as a stream of bits (not bytes). A byte is generally used to signify a unit of memory or storage (i.e., RAM or ROM) that usually is eights bits long (wide) and is the smallest number of bits used to represent a character in the original [[dido:public:ra:xapend:xapend.a_glossary:a:ascii|ASCII]] character set used by most most computers. | A bit represents a single binary digit either '0' or '1'. The '0' or '1' generally represent yes/no, true/false, on/off, or up/down/ It does not necessarily equate a '0' with false and a '1' with true. When transmitted over a network, the data is sent as a stream of bits (not bytes). A byte is generally used to signify a unit of memory or storage (i.e., RAM or ROM) that usually is eights bits long (wide) and is the smallest number of bits used to represent a character in the original [[dido:public:ra:xapend:xapend.a_glossary:a:ascii|ASCII]] character set used by most most computers. | ||
| - | Bandwidth is measured as bits per second and is used as a denominator of bits (i.e., kilobits, megabits). When bandwidth is used to describe a network connection (i.e., switch, server or router), it is generally in megabits, however, when it is used to describe the data flowing into the connection then bandwidth referred to as traffic and could be measured in either megabits per second (Mb/s or Mbps) or megabytes per second (MB/s or MBps). Although the nomencalture is subtle, it is important to be aware of the difference. An inadvertent misunderstanding could result in a error of magnitude 8 (i.e., 1 byte = 8 bits). | + | Bandwidth is measured as bits per second and is used as a denominator of bits (i.e., kilobits, megabits). When bandwidth is used to describe a network connection (i.e., switch, [[dido:public:ra:xapend:xapend.a_glossary:s:server|server]] or router), it is generally in megabits, however, when it is used to describe the data flowing into the connection then bandwidth referred to as traffic and could be measured in either megabits per second (Mb/s or Mbps) or megabytes per second (MB/s or MBps). Although the nomencalture is subtle, it is important to be aware of the difference. An inadvertent misunderstanding could result in a error of magnitude 8 (i.e., 1 byte = 8 bits). |
| Since the megabytes figure will be larger than the megabits figure (equation to follow shortly) most industry service providers like to give a total transfer based on this figure – however most bandwidth providers use megabits. | Since the megabytes figure will be larger than the megabits figure (equation to follow shortly) most industry service providers like to give a total transfer based on this figure – however most bandwidth providers use megabits. | ||
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| <caption>Some examples of converting MegaBits to MegaBytes</caption> | <caption>Some examples of converting MegaBits to MegaBytes</caption> | ||
| ^ Mega Bytes per second ^ bits per Byte ^ MegaBits per second ^ | ^ Mega Bytes per second ^ bits per Byte ^ MegaBits per second ^ | ||
| - | | 8 MBps | *8 | 64 Mbps [(notes:>**Note:** there are two kinds of units listed Mbps (Mega BIT per second) and MBps (Mega BYTE per second) )] | | + | | 8 MBps | *8 | 64 Mbps [(notes:>**Note:** there are two kinds of units listed: Mbps (Mega BIT per second) and MBps (Mega BYTE per second) )] | |
| | 9 MBps | *8 | 72 Mbps | | | 9 MBps | *8 | 72 Mbps | | ||
| | 10 MBps | *8 | 80 Mbps | | | 10 MBps | *8 | 80 Mbps | | ||
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| </table> | </table> | ||
| - | : //Today, many cable ISPs are capable of delivering internet speeds over 1 Gigabit per second. That’s 1 billion bits per second! Not everyone needs this much speed today (Netflix reports that a connection speed of 25 Megabits per second is all that’s required to stream Ultra HD content), but cable ISPs see a future of virtual reality, telehealth, driverless cars, and an internet of things. In that environment, speed requirements are going to increase. Regardless of whether it’s necessary today, ISPs are preparing their networks for the needs of the future. So, while we’ll likely always measure speed in bits and data volume in bytes, the consistency and speed at which those bits are delivered over the internet will surely rise.(( | + | : //Today, many cable ISPs are capable of delivering [[dido:public:ra:xapend:xapend.a_glossary:i:internet|internet]] speeds over 1 Gigabit per second. That’s 1 billion bits per second! Not everyone needs this much speed today (Netflix reports that a connection speed of 25 Megabits per second is all that’s required to stream Ultra HD content), but cable ISPs see a future of virtual reality, telehealth, driverless cars, and an [[dido:public:ra:xapend:xapend.a_glossary:i:iot|internet of things]]. In that environment, speed requirements are going to increase. Regardless of whether it’s necessary today, ISPs are preparing their networks for the needs of the future. So, while we’ll likely always measure speed in bits and data volume in bytes, the consistency and speed at which those bits are delivered over the internet will surely rise.(( |
| __Why Do We Use Bits to Measure Internet Speed but Bytes to Measure Data?__, The Internet and Television Association (NCTA), 21 July 1017, Accessed 20 July 2020, [[https://www.ncta.com/whats-new/why-do-we-use-bits-measure-internet-speed-but-bytes-measure-data]] | __Why Do We Use Bits to Measure Internet Speed but Bytes to Measure Data?__, The Internet and Television Association (NCTA), 21 July 1017, Accessed 20 July 2020, [[https://www.ncta.com/whats-new/why-do-we-use-bits-measure-internet-speed-but-bytes-measure-data]] | ||
| ))// | ))// | ||
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| [[dido:public:ra:1.4_req:2_nonfunc:40_performance:04_nework | Return to Top]] | [[dido:public:ra:1.4_req:2_nonfunc:40_performance:04_nework | Return to Top]] | ||
| - | //<color #FF0000><todo>TBD - to be added/expanded in future revisions of the DIDO RA</todo></color>// | + | : <wrap hi><color red> To be added/expanded in future revisions of the DIDO RA </color></wrap> |
| /**=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- | /**=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- | ||
dido/public/ra/1.4_req/2_nonfunc/40_performance/04_nework.1622859492.txt.gz · Last modified: 2021/06/04 22:18 by char
