ZyXEL Communications G-570U Guide de l'utilisateur télécharger pdf (Page 151)

ZyXEL G-570U User’s Guide

Appendix D IP Subnetting 151

The following table shows class C IP address last octet values for each subnet.

The following table is a summary for class “C” subnet planning.

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 Table 39 on page 146) available for subnetting.

Table 50 Eight Subnets

SUBNET SUBNET ADDRESS FIRST ADDRESS LAST ADDRESS

BROADCAST

ADDRESS

1 0 1 30 31

2 32 33 62 63

3 64 65 94 95

4 96 97 126 127

5 128 129 158 159

6 160 161 190 191

7 192 193 222 223

8 224 225 254 255

Table 51 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

1 2 ... 146 147 148 149 150 151 152 153 154 155 156 ... 161 162

Pas de commentaire

ZyXEL Communications G-570U Guide de l'utilisateur Page 151