14. quality of service1
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Quality of Service
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Troughput
Throughput Rate rata – rata suatu massage atau paketsukses terkirim pada kanal komunikasi:
Jumlah massage sukses selama pengamatanT =
Lama pengamatan
8
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itter
itter atau !uga dise"ut #ariasi dela$%ontoh :
Paket Number Kirim Terima
0 0 20
1 1 21
2 2 22
3 3 23
Paket Number Kirim Terima0 0 10
1 1 13
2 2 11
3 3 17
Delay
20
20
20
20
Delay10
12
9
14
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PaketNumber
Kirim Terima
1 0 1
2 10 11
3 20 21
PaketNumber
Kirim Terima
1 0 1
2 10 15
3 20 27
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&'R(ikirim : 0 1 1 0 0 0 1 0 1 1
(iterima : 0 0 1 0 1 0 1 0 0 1
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aringan
+,heduling :-.-/ *ueuing
)riorit$ *ueuing
eighted -air *ueuing
Tra, +haping eak$ &u,ket
Resour,e Reser#ation .ntegrated +er#i,e
.nt+er#dmission %ontrol (ierentiated +er#i,e
(i+er#
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-.-/
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)riorit$ *ueuing
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eighted -air *ueuing
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Tra, +haping
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+er#i,es
%on,erns ith .ntser#:+,ala"ilit$: signaling maintaining per;o
router state di,ult ith large num"er o< ;os
-le=i"le +er#i,e >odels: .ntser# has onl$ to
,lasses? lso ant @Aualitati#eB ser#i,e ,lassesrelati#e ser#i,e distin,tion: )latinum Cold +il#er
(iser# approa,h:
simple <un,tions in netork ,ore relati#el$,omple= <un,tions at edge routers or hosts
(onDt deEne ser#i,e ,lasses pro#ide <un,tional,omponents to "uild ser#i,e ,lasses
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Pengukuran QoS
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)engukuran Fualitas Go.)
>/+ >ean /pinion +,ore mrp metode $gdigunakan untuk menentukan kualitas suaradlm !aringan .) "erdasarkan standar .THT
)?800
>etode ini "ersi<at su"!ekti< krn "erdasarkanpendapat orangperorangan
Hntuk menentukan nilai ada 2 ,ara $aitu : %o#ersation opinion istening test
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Rekomendasi nilai .THT)?800 untuk nilai >/+ :
NL! "#S #PN
5 sangat baik
4 baik
3 cukup baik
2 tidak baik
1 buruk
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)engukuran menggunakan+o<tare 'therealireshark
)en$etingan ethereal
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an!utan???1>elakukan komunikasi dengan end user meleati !aringan $ang diamati
>elakukan ,apture pa,ket
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an!utan???2
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an!utan???3>enghitung throughput
Throughput dalam packet/second
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an!utan???4
>enghitung ratarata dela$ pengirimanpa,ket satu arah one a$ dela$ !itter danpa,ket loss
>enghitung >/+ dari parameter $ang telahdiperoleh
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)engukuran menggunakan%ommand )rompt
PING
)ing digunakan untuk memeriksa suatu ser#er"eker!a dengan ,ara mengirimkan "e"erapa"$te data dan menerima pantulann$a?
ika pantulan diterima "erarti komputer tu!uanmem"eri respon dan menun!ukkan "aha
komputer tu!uan sedang "eroperasi
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an!utan???1)engukuran ini sering digunakan untukmenentukan : &$te data $g dikirim
aktu $g dikirim TT Time to i#e
&an$akn$a paket $ang dikirim
&an$akn$a paket $ang diterima
#erage
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an!utan???2
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)engukuran Tra,eRoute
>ekanisme tra,eroute digunakan untukmendapatkan in<ormasi tentang !alur $angdilaluin$a "erdasarkan TT Time to i#e
Tra,eroute dilakukan untuk pengukuranper<ormansi !aringan "erdasarkan parameter"andidth latensi dan rugirugi data
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an!utan???5
)engukuran +peed
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)engukuran +peed Test
)ada saat melakukan reAuest untuk +peed Test maka dikirimkan se!umlah data $ang"esarn$a sesuai pilihan ke "roser dan
menghitung kapan data terse"ut mulai danselesai ditrans<er? (engan perhitungansederhana sehingga dapat menentukan"erapa "esar koneksi $ang ter!adi pada saatdata terse"ut di trans<er
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an!utan???1
)erhitungan $ang dapat dilakukan setelahdata ditrans<er pada "roser maka "e"erapahal $ang perlu di,atat $aitu :
&esar -ile $ang dikirim dalam $yte aktu mulai Trans<er
aktu +elesai Trans<er
(ari data $g didapat dilakukan perhitungans""aktu Trans<er I aktu +elesai aktu >ulai Fe,epatan dalam &its I &esar -ile aktu Trans<er Fe,epatan dalam &$tess I Fe,epatan dalam &it 8
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an!utan???2&e"erapa hal $g dapat mempengaruhi hasil speed test
adl :okasi ser#er)% $ang dapat melakukan proses donload trans<er
data $ang lain
>enggunakan aplikasi $ang melakukan trans<er data ke !aringan Jetork khususn$a $ang satu su"net dengankoneksi anda ke internet
Fualitas !aringan khusun$a pada trans<er data analog$ang sangat mungkin terpengaruh oleh noise atauadan$a inter<erensi elektromagnetis pada !aringan
pa"ila menggunakan modem 56F&ps se,ara real"andidth maksimal $ang mungkin didapat han$alah 53F&ps keter"atasan ini ada pada spesiEkasi -%%n$a
)em"atasan "esarn$a "andidth e<ekti< pada !aringanseperti pem"atasan akses oleh &andidth management-ireall ds"
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Sekian
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