Adi Nugroho wrote:
>
> Numpang tanya dong...
> Satu:
> angka 8 KB/s itu datengnya dari mana (itungannya ada ngkali?)
> Penasaran nih... buat itung-itungan kaloq mo upgrade bandwidth.
64 kbit/sec
known: 1 byte = 8 bits
hence: 64 / 8 = 8 k_byte_/sec
tapi untuk modem pstn:
1 byte butuh 10 bit (8 bit data + 2 start & stop bit)
> Dua:
> Saya baru sadar, kaloq saya ping biasa (dengan default 32 bytes),
> reply-nya sekitar 500-700 mS.
> Pas saya coba dengan packet size 4096 bytes, reply-nya jadi 1,5 sampe 2
> detik. Wuih.... kejam...
> Apa ini berarti speed saya cuman 2 (4kb/2sec) sampe 2.6 (4kb/1.5sec)
> KB/s?
At 1.5 sec ---> speed ~= (4kb / 1.5) * 2 (bolak balik) = 5.4 kbytes/sec
At 2 sec ---> (4kb / 2) * 2 = 4kbytes/sec
Kesimpulan bandwith 32kbits/sec (min) sampai 43.2kbits/sec (max)
tapi 64kbps itukan ideal, pasti ada overhead, load, dll.
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