Senin, 28 Januari 2013

IP Address

18.01 0

Perhitungan IP

Perhitungan biner ke desimal

Dibawah ini adalah tabel perhitungan untuk mengubah dari biner ke desimal.

11111111
1286432168421

Jika bilanagan biner 1 (hidup) semua maka bilanagan desimalnya adalah : 128+64+32+16+8+4+2+1 =255

Contoh jika tidak semua 1 (hidup)

11000000
12864000000

Maka didapat bilangan desimalnya adalah : 128+64 = 192

###########################################################

#######################Contoh kasus :######################

###########################################################

IP : 192.168.100.1, berapa bilangan biner nya ???

11000000
12864000000

Desimal : 128+64 = 192 Biner 11000000

===========================================================

10100000
12803208000

Desimal : 128+32 = 168 Biner 10100000

===========================================================

01100100
0643200400

Desimal : 64+32+4 = 100 Biner 01100100

===========================================================

00000001
00000001

Desimal : 1 = 1 Biner 00000001

===========================================================

Maka 192.168.100.1 = 11000000.10100000.01100100.00000001




Subneting adalah suatu teknik membagi IP sesuai dengan kebutuhan

Di dalam IP address selalu si ikuti dengan Subnetmask taukah apa itu subnetmask, subnetmask adalah cara untuk membatasi berapa jumlah IP yang dapat terkoneksi/terhubung di dalam 1 jaringan tersebut.

PENJELASAN SEDIKIT TENTANG IP

Di dalam dunia tcp/ip terdapat 3 macam IP yaitu :

  • Network ID
  • Host ID
  • Broadcast ID

Network ID

Network ID adalah suatu identitas jaringan, dimana IP Network ID ini tidak dapat digunakan oleh komputer, biasanya NEtwork ID adalah IP pertama dalam subneting

Host ID

Host ID adalah IP yang dapat digunakan oleh komputer

Broadcast ID

Broadcast ID adalah IP terakhir yang tidak dapat digunakan juga oleh komputer


Contoh Subneting

IP Address : 192.168.1.1/24."/24" menunjukan subnetmask yaitu : 255.255.255.0

Kenapa "/24"???

Jawab...!!!

11111111
1286432168421

Dalam biner terdapat 8 bit jika 1 (hidup semua), seperti (desimal) 255 = (biner)11111111 /8bit

Maka jika "/24" : 8+8+8+0 = 255.255.255.0

Tabel :

CIDRSubnetmaskBanyak Host/subnet
/30255.255.255.2522
/29255.255.255.2486
/28255.255.255.24014
/27255.255.255.22430
/26255.255.255.19262
/25255.255.255.128126
/24255.255.255.0254
/23255.255.254.0510
/22255.255.252.01022
/21255.255.248.02046
/20255.255.240.04094
/19255.255.224.08190
/18255.255.192.016.382
/17255.255.128.032.766
/16255.255.0.065.534
/15255.254.0.0131.070
/14255.252.0.0262.142
/13255.248.0.0524.286
/12255.240.0.01.048.574
/11255.224.0.02.097.150
/10255.192.0.04.194.302
/9255.128.0.08.388.606
/8255.0.0.016.777.214
/7254.0.0.033.554.430
/6252.0.0.067.108.862
/5248.0.0.0134.217.726
/4240.0.0.0268.435.454
/3224.0.0.0536.870.910
/2192.0.0.01.073.741.822
/1128.0.0.02.147.483.646

Contoh kasus :

    IP : 192.168.1.1/30

    atau

    IP : 192.168.1.1, Subnetmask : 255.255.255.252

Berapakah banyak Host ID dalam 1 network ???

Banyak Host ID : 32-30=2, 2^2=4, 4-2=2 Host ID

Network ID192.168.1.0
Host ID 1192.168.1.1
Host ID 2192.168.1.2
Broadcast ID192.168.1.3
Network ID192.168.1.4
Host ID 1192.168.1.5
Host ID 2192.168.1.6
Broadcast ID192.168.1.7
Network ID192.168.1.8
Host ID 1192.168.1.9
Host ID 2192.168.1.10
Broadcast ID192.168.1.11
Network ID192.168.1.12
Host ID 1192.168.1.13
Host ID 2192.168.1.14
Broadcast ID192.168.1.15
Network ID192.168.1.16
Host ID 1192.168.1.17
Host ID 2192.168.1.18
Broadcast ID192.168.1.19
Network ID192.168.1.20
Host ID 1192.168.1.21
Host ID 2192.168.1.22
Broadcast ID192.168.1.23
Network ID192.168.1.24
Host ID 1192.168.1.25
Host ID 2192.168.1.26
Broadcast ID192.168.1.27
Network ID192.168.1.28
Host ID 1192.168.1.29
Host ID 2192.168.1.30
Broadcast ID192.168.1.31
Network ID192.168.1.32
Host ID 1192.168.1.33
Host ID 2192.168.1.34
Broadcast ID192.168.1.35
Network ID192.168.1.36
Host ID 1192.168.1.37
Host ID 2192.168.1.38
Broadcast ID192.168.1.39
Network ID192.168.1.40
Host ID 1192.168.1.41
Host ID 2192.168.1.42
Broadcast ID192.168.1.43
Network ID192.168.1.44
Host ID 1192.168.1.45
Host ID 2192.168.1.46
Broadcast ID192.168.1.47
Network ID192.168.1.48
Host ID 1192.168.1.49
Host ID 2192.168.1.50
Broadcast ID192.168.1.51
Network ID192.168.1.52
Host ID 1192.168.1.53
Host ID 2192.168.1.54
Broadcast ID192.168.1.55
Network ID192.168.1.56
Host ID 1192.168.1.57
Host ID 2192.168.1.58
Broadcast ID192.168.1.59
Network ID192.168.1.60
Host ID 1192.168.1.61
Host ID 2192.168.1.62
Broadcast ID192.168.1.63
Network ID192.168.1.64
Host ID 1192.168.1.65
Host ID 2192.168.1.66
Broadcast ID192.168.1.67
Network ID192.168.1.68
Host ID 1192.168.1.69
Host ID 2192.168.1.70
Broadcast ID192.168.1.71
Network ID192.168.1.72
Host ID 1192.168.1.73
Host ID 2192.168.1.74
Broadcast ID192.168.1.75
Network ID192.168.1.76
Host ID 1192.168.1.77
Host ID 2192.168.1.78
Broadcast ID192.168.1.79
Network ID192.168.1.80
Host ID 1192.168.1.81
Host ID 2192.168.1.82
Broadcast ID192.168.1.83
Network ID192.168.1.84
Host ID 1192.168.1.85
Host ID 2192.168.1.86
Broadcast ID192.168.1.87
Network ID192.168.1.88
Host ID 1192.168.1.89
Host ID 2192.168.1.90
Broadcast ID192.168.1.91
Network ID192.168.1.92
Host ID 1192.168.1.93
Host ID 2192.168.1.94
Broadcast ID192.168.1.95
Network ID192.168.1.96
Host ID 1192.168.1.97
Host ID 2192.168.1.98
Broadcast ID192.168.1.99
Network ID192.168.1.100
Host ID 1192.168.1.101
Host ID 2192.168.1.102
Broadcast ID192.168.1.103
Network ID192.168.1.104
Host ID 1192.168.1.105
Host ID 2192.168.1.106
Broadcast ID192.168.1.107
Network ID192.168.1.108
Host ID 1192.168.1.109
Host ID 2192.168.1.110
Broadcast ID192.168.1.111
Network ID192.168.1.112
Host ID 1192.168.1.113
Host ID 2192.168.1.114
Broadcast ID192.168.1.115
Network ID192.168.1.116
Host ID 1192.168.1.117
Host ID 2192.168.1.118
Broadcast ID192.168.1.119
Network ID192.168.1.120
Host ID 1192.168.1.121
Host ID 2192.168.1.122
Broadcast ID192.168.1.123
Network ID192.168.1.124
Host ID 1192.168.1.125
Host ID 2192.168.1.126
Broadcast ID192.168.1.127
Network IDxxx.xxx.xxx.xxx
Host ID 1xxx.xxx.xxx.xxx.
Host ID 2xxx.xxx.xxx.xxx
Broadcast ID192.168.1.255
Note : Jika lokasi IP komputer sudah berbeda network ID, maka komputer tersebut tidak dapak terkoneksi dengan komputer lain yang berbeda network ID.


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