31
In this diagram, you can see the subnet mask with 25-bit long, 255.255.255.128,
contains 126 members in the sub-netted network. Another is that the length of network
prefix equals the number of the bit with 1s in that subnet mask. With this, you can easily
count the number of IP addresses matched. The following table shows the result.
Prefix Length No. of IP matched No. of Addressable IP
/32 1
-
/31 2
-
/30 4
2
/29 8
6
/28 16
14
/27 32
30
/26 64
62
/25 128
126
/24 256
254
/23 512
510
/22 1024
1022
/21 2048
2046
/20 4096
4094
/19 8192
8190
/18 16384
16382
/17 32768
32766
/16 65536
65534
Table 2-4
According to the scheme above, a subnet mask 255.255.255.0 will partition a
network with the class C. It means there will have a maximum of 254 effective nodes
existed in this sub-netted network and is considered a physical network in an autonomous
network. So it owns a network IP address which may looks like 168.1.2.0.
With the subnet mask, a bigger network can be cut into small pieces of network. If
we want to have more than two independent networks in a worknet, a partition to the
network must be performed. In this case, subnet mask must be applied.
Содержание L2 Plus
Страница 1: ......
Страница 2: ......
Страница 3: ...16 Port SFP 8 Port Combo GbE L2 Plus Managed Switch...
Страница 4: ...2...
Страница 8: ...6 Revision History Release Date Revision 0 91 2008 03 03 A1 0 95 2008 06 25 A2 0 95 2008 07 21 A2...
Страница 36: ...34 Fig 2 15 Office Network Connection Fig 2 14 Peer to peer Network Connection...
Страница 56: ......
Страница 78: ...22 Fig 3 24...
Страница 81: ...25 Fig 3 26...
Страница 88: ...32 Fig 3 31...
Страница 96: ...40 Fig 3 39 Fig 3 40 Fig 3 41...
Страница 108: ...52 Fig 3 54 Set up Typical Network Application Rules Finish Fig 3 55 Set up Typical Network Application Rules Finish...
Страница 112: ...56 Fig 3 62 Set up VLAN Tag Priority Mapping Finish...
Страница 119: ...63 Fig 3 67 Ingress Port Fig 3 68...
Страница 121: ...65 Fig 3 70...
Страница 122: ...66 Fig 3 71 Fig 3 72 Fig 3 73 ARP...
Страница 123: ...67 Fig 3 74 ARP Fig 3 75 ARP Fig 3 76 ARP Fig 3 77 ARP...
Страница 124: ...68 Fig 3 78 ARP Fig 3 79 ARP Fig 3 80 ARP Fig 3 81 ARP...
Страница 125: ...69 Fig 3 82 ARP Fig 3 83 ARP Fig 3 84 ARP Fig 3 85 ARP Fig 3 86 ARP...
Страница 126: ...70 Fig 3 87 IPv4 Fig 3 88 IPv4 Fig 3 89 IPv4...
Страница 127: ...71 Fig 3 90 IPv4 Fig 3 91 IPv4 Fig 3 92 IPv4 Fig 3 93 IPv4 Fig 3 94 IPv4...
Страница 128: ...72 Fig 3 95 IPv4 Fig 3 96 IPv4 Fig 3 97 IPv4 Fig 3 98 IPv4 Fig 3 99 IPv4...
Страница 129: ...73 Fig 3 100 IPv4 Fig 3 101 IPv4 Fig 3 102 IPv4...
Страница 130: ...74 Fig 3 103 IPv4 Fig 3 104 IPv4 Fig 3 105 IPv4...
Страница 131: ...75 Fig 3 106 IPv4 Fig 3 107 IPv4 Fig 3 108 IPv4...
Страница 132: ...76 Fig 3 109 IPv4 Fig 3 110 IPv4 Fig 3 111 IPv4...
Страница 133: ...77 Fig 3 112 IPv4 Fig 3 113 IPv4 Fig 3 114 IPv4...
Страница 134: ...78 Fig 3 115 IPv4 Fig 3 116 IPv4 Fig 3 117 Action...
Страница 135: ...79 Fig 3 118 Rate Limiter Fig 3 119 Port Copy...
Страница 136: ...80 Fig 3 120 DMAC Filter Fig 3 121 VLAN ID Filter Fig 3 122 VLAN ID Filter...
Страница 148: ...92 Fig 3 125 Set up Policy Rules Fig 3 126 Set up Policy Rules Fig 3 127 Set up Policy Rules...
Страница 149: ...93 Fig 3 128 Set up Policy Rules Finish Fig 3 129 Set up Port Policies Fig 3 130 Set up Port Policies...
Страница 150: ...94 Fig 3 131 Set up Port Policies Fig 3 132 Set up Port Policies Finish...
Страница 151: ...95 Fig 3 133 Set up Typical Network Application Rules Fig 3 134 Set up Typical Network Application Rules...
Страница 164: ...108 Fig 3 143 802 1X Server Configuration...
Страница 168: ...112 Fig 3 145 802 1X Status...
Страница 194: ...138 Fig 3 161 Mirror Configuration...
Страница 214: ...158 Fig 4 1 Fig 4 2 LGB1005A R2 LGB1005A R2 LGB1005A R2 LGB1005A R2...
