Prestige 660R ADSL 2+ Access Gateway
IP Subnetting
B-7
Chart B-12 Class C Subnet Planning
NO. “BORROWED” HOST BITS
SUBNET MASK
NO. SUBNETS NO. HOSTS PER SUBNET
1 255.255.255.128
(/25)
2
126
2 255.255.255.192
(/26)
4
62
3 255.255.255.224
(/27)
8
30
4 255.255.255.240
(/28)
16
14
5 255.255.255.248
(/29)
32
6
6 255.255.255.252
(/30)
64
2
7 255.255.255.254
(/31)
128
1
Subnetting With Class A and Class B Networks.
For class “A” and class “B” addresses the subnet mask also determines which bits are part of the network
number and which are part of the host ID.
A class “B” address has two host ID octets available for subnetting and a class “A” address has three host ID
octets (see
Chart B-1
) available for subnetting.
The following table is a summary for class “B” subnet planning.
Chart B-13 Class B Subnet Planning
NO. “BORROWED” HOST BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER SUBNET
1 255.255.128.0
(/17)
2
32766
2 255.255.192.0
(/18)
4
16382
3 255.255.224.0
(/19)
8
8190
4 255.255.240.0
(/20)
16
4094
5 255.255.248.0
(/21)
32
2046
6 255.255.252.0
(/22)
64
1022
7 255.255.254.0
(/23)
128
510
8 255.255.255.0
(/24)
256
254
9 255.255.255.128
(/25)
512 126
Содержание ZyXEL Prestige 660R
Страница 1: ...Prestige 660R ADSL 2 Access Gateway User s Guide Version 3 40 April 2004...
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Страница 107: ...Maintenance V Part V Maintenance This part covers the maintenance screens...
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Страница 257: ...VIII Part VIII Appendices and Index This part contains additional background information and an index or key terms...
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