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Phuong phap chia subnet nhanh nhat

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PH??NG PH?P T?NH SUBNET NHANH NH?T ? M?t ??a ch? IP v.4 c¨® 32 bit, t¨¢ch th¨¤nh 2 ph?n: Network ID v¨¤ Host ID - Network ID: d?y bit d¨´ng ¡°??nh danh¡± cho m?ng IP (nh? ??a ch? c?a 1 con h?m / ng?). - Host ID: d?y bit d¨´ng ¡°??nh danh¡± cho 1 host trong m?ng ?¨® (nh? s? nh¨¤ trong h?m) ? Trong m?t Network c¨® n ??a ch? IP (t? 0 ??n n-1): - ??a ch? IP ??u ti¨ºn ???c d¨´ng l¨¤m ¡°??nh danh¡± cho m?ng ?¨®. - ??a ch? IP cu?i c¨´ng ???c d¨´ng l¨¤m ??a ch? broadcast cho to¨¤n m?ng ?¨®. ? Nh? v?y: M?t m?ng c¨® n ??a ch? IP th¨¬ ch? c¨® n-2 ??a ch? IP ???c d¨´ng g¨¢n cho hosts B?ng tra subnet ???c chia ra t? m?ng class C: STT S? bit Net.ID Subnet Mask S? l??ng m?ng S? l??ng ??a ch? IP trong m?ng 0 Class C 24 255.255.255.0 20 = 1 m?ng 256 1 Class C + 1 25 255.255.255.128 21 = 2 m?ng 128 2 Class C + 2 26 255.255.255.192 22 = 4 m?ng 64 3 Class C + 3 27 255.255.255.224 23 = 8 m?ng 32 4 Class C + 4 28 255.255.255.240 24 = 16 m?ng 16 5 Class C + 5 29 255.255.255.248 25 = 32 m?ng 8 6 Class C + 6 30 255.255.255.252 26 = 64 m?ng 4 7 Class C + 7 31 255.255.255.254 27 = 128 m?ng 2 C¨¢c v¨ª d?: T¨¬nh hu?ng 1: C?ng ty ABC s? d?ng m?t ???ng m?ng 192.168.4.0 v¨¤ s? d?ng subnet mask 255.255.255.224 ?? chia subnet. S? l??ng host t?i ?a c¨® th? s? d?ng c?a m?i subnet l¨¤ ? Gi?i ?¨¢p: - ?ng v?i Subnet Mask255.255.255.224,=> tra v¨¤o d¨°ng th? 3 => m?i Subnet c¨® 32 ??a ch? - V?y: S? l??ng ??a ch? t?i ?a c¨® th? s? d?ng c?a m?i subnet l¨¤: 32 ¨C 2 = 30 ??a ch?. T¨¬nh hu?ng 2: X¨¢c ??nh ??a ch? ???ng m?ng (Network ID address) v¨¤ ??a ch? Broadcast (Network Broadcast Address) c?a ???ng m?ng ?¨®, khi bi?t ??a ch? IP l¨¤ 198.101.6.85/26 Gi?i ?¨¢p: - ??a ch? IP l¨¤ 198.101.6.85/26,=> tra v¨¤o d¨°ng th? 2 => m?i Subnet c¨® 64 ??a ch? - D?y IP addrs c?a o Subnet 1: t? 0 ? 63 o Subnet 2: t? 64 ? 127
o Subnet 3: t? 128? 191 o Subnet 4: t? 192 ? 255 - IP address ?? cho (198.101.6.85/26) thu?c Subnet 2 - V?y: o Network ID address: 192.168.6.64 /26 o Network Broadcast Address: 192.168.6.127 /26 T¨¬nh hu?ng 3: 192.168.30.105 /27 ? Gi?i ?¨¢p: - ??a ch? IP l¨¤ 192.168.30.105 /27,=> tra v¨¤o d¨°ng th? 3 ta th?y: Class C ???c chia th¨¤nh 8 Subnet (m?ng con), m?i Subnet c¨® 32 ??a ch? - D?y IP addrs c?a: o Subnet 1: t? 0 ?31 o Subnet 2: t? 32?63 o Subnet 3: t? 64?95 o Subnet 4: t? 96?127 o Subnet 5: t? 128?159 o Subnet 6: t? 160?191 o Subnet 7: t? 192?223 o Subnet 8: t? 224 ? 255 - IP address ?? cho (192.168.30.135 /27) thu?c Subnet 5 (t? 192.168.30.128 /27??n 192.168.30.159 /27)

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Phuong phap chia subnet nhanh nhat

  • 1. PH??NG PH?P T?NH SUBNET NHANH NH?T ? M?t ??a ch? IP v.4 c¨® 32 bit, t¨¢ch th¨¤nh 2 ph?n: Network ID v¨¤ Host ID - Network ID: d?y bit d¨´ng ¡°??nh danh¡± cho m?ng IP (nh? ??a ch? c?a 1 con h?m / ng?). - Host ID: d?y bit d¨´ng ¡°??nh danh¡± cho 1 host trong m?ng ?¨® (nh? s? nh¨¤ trong h?m) ? Trong m?t Network c¨® n ??a ch? IP (t? 0 ??n n-1): - ??a ch? IP ??u ti¨ºn ???c d¨´ng l¨¤m ¡°??nh danh¡± cho m?ng ?¨®. - ??a ch? IP cu?i c¨´ng ???c d¨´ng l¨¤m ??a ch? broadcast cho to¨¤n m?ng ?¨®. ? Nh? v?y: M?t m?ng c¨® n ??a ch? IP th¨¬ ch? c¨® n-2 ??a ch? IP ???c d¨´ng g¨¢n cho hosts B?ng tra subnet ???c chia ra t? m?ng class C: STT S? bit Net.ID Subnet Mask S? l??ng m?ng S? l??ng ??a ch? IP trong m?ng 0 Class C 24 255.255.255.0 20 = 1 m?ng 256 1 Class C + 1 25 255.255.255.128 21 = 2 m?ng 128 2 Class C + 2 26 255.255.255.192 22 = 4 m?ng 64 3 Class C + 3 27 255.255.255.224 23 = 8 m?ng 32 4 Class C + 4 28 255.255.255.240 24 = 16 m?ng 16 5 Class C + 5 29 255.255.255.248 25 = 32 m?ng 8 6 Class C + 6 30 255.255.255.252 26 = 64 m?ng 4 7 Class C + 7 31 255.255.255.254 27 = 128 m?ng 2 C¨¢c v¨ª d?: T¨¬nh hu?ng 1: C?ng ty ABC s? d?ng m?t ???ng m?ng 192.168.4.0 v¨¤ s? d?ng subnet mask 255.255.255.224 ?? chia subnet. S? l??ng host t?i ?a c¨® th? s? d?ng c?a m?i subnet l¨¤ ? Gi?i ?¨¢p: - ?ng v?i Subnet Mask255.255.255.224,=> tra v¨¤o d¨°ng th? 3 => m?i Subnet c¨® 32 ??a ch? - V?y: S? l??ng ??a ch? t?i ?a c¨® th? s? d?ng c?a m?i subnet l¨¤: 32 ¨C 2 = 30 ??a ch?. T¨¬nh hu?ng 2: X¨¢c ??nh ??a ch? ???ng m?ng (Network ID address) v¨¤ ??a ch? Broadcast (Network Broadcast Address) c?a ???ng m?ng ?¨®, khi bi?t ??a ch? IP l¨¤ 198.101.6.85/26 Gi?i ?¨¢p: - ??a ch? IP l¨¤ 198.101.6.85/26,=> tra v¨¤o d¨°ng th? 2 => m?i Subnet c¨® 64 ??a ch? - D?y IP addrs c?a o Subnet 1: t? 0 ? 63 o Subnet 2: t? 64 ? 127
  • 2. o Subnet 3: t? 128? 191 o Subnet 4: t? 192 ? 255 - IP address ?? cho (198.101.6.85/26) thu?c Subnet 2 - V?y: o Network ID address: 192.168.6.64 /26 o Network Broadcast Address: 192.168.6.127 /26 T¨¬nh hu?ng 3: 192.168.30.105 /27 ? Gi?i ?¨¢p: - ??a ch? IP l¨¤ 192.168.30.105 /27,=> tra v¨¤o d¨°ng th? 3 ta th?y: Class C ???c chia th¨¤nh 8 Subnet (m?ng con), m?i Subnet c¨® 32 ??a ch? - D?y IP addrs c?a: o Subnet 1: t? 0 ?31 o Subnet 2: t? 32?63 o Subnet 3: t? 64?95 o Subnet 4: t? 96?127 o Subnet 5: t? 128?159 o Subnet 6: t? 160?191 o Subnet 7: t? 192?223 o Subnet 8: t? 224 ? 255 - IP address ?? cho (192.168.30.135 /27) thu?c Subnet 5 (t? 192.168.30.128 /27??n 192.168.30.159 /27)