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Appendix C IP Addresses and Subnetting
User
’
s Guide
224
The following figure shows an example IP address in which the first three octets
(192.168.1) are the network number, and the fourth octet (16) is the host ID.
Figure 124
Network Number and Host ID
How much of the IP address is the network number and how much is the host ID
varies according to the subnet mask.
Subnet Masks
A subnet mask is used to determine which bits are part of the network number,
and which bits are part of the host ID (using a logical AND operation). The term
“
subnet
”
is short for
“
sub-network
”
.
A subnet mask has 32 bits. If a bit in the subnet mask is a
“
1
”
then the
corresponding bit in the IP address is part of the network number. If a bit in the
subnet mask is
“
0
”
then the corresponding bit in the IP address is part of the host
ID.
The following example shows a subnet mask identifying the network number (in
bold text) and host ID of an IP address (192.168.1.2 in decimal).
Table 70
Subnet Mask - Identifying Network Number
1ST
OCTET:
(192)
2ND
OCTET:
(168)
3RD
OCTET:
(1)
4TH
OCTET
(2)
IP Address (Binary)
11000000
10101000
00000001
00000010
Subnet Mask (Binary)
11111111 11111111 11111111
00000000
C
om
pan
y
C
on
fiden
tial
Содержание NBG-417N
Страница 9: ...Contents Overview User s Guide 10 C o m p a n y C o n f i d e n t i a l...
Страница 17: ...Table of Contents User s Guide 18 C o m p a n y C o n f i d e n t i a l...
Страница 19: ...20 C o m p a n y C o n f i d e n t i a l...
Страница 23: ...Chapter 1 Introduction User s Guide 24 C o m p a n y C o n f i d e n t i a l...
Страница 25: ...Chapter 2 The WPS Button User s Guide 26 C o m p a n y C o n f i d e n t i a l...
Страница 37: ...Chapter 3 The Web Configurator User s Guide 38 C o m p a n y C o n f i d e n t i a l...
Страница 53: ...Chapter 4 Connection Wizard User s Guide 54 C o m p a n y C o n f i d e n t i a l...
Страница 61: ...Chapter 5 AP Mode User s Guide 62 C o m p a n y C o n f i d e n t i a l...
Страница 77: ...Chapter 6 Tutorials User s Guide 78 C o m p a n y C o n f i d e n t i a l...
Страница 79: ...80 C o m p a n y C o n f i d e n t i a l...
Страница 117: ...Chapter 9 LAN User s Guide 118 C o m p a n y C o n f i d e n t i a l...
Страница 123: ...Chapter 10 DHCP Server User s Guide 124 C o m p a n y C o n f i d e n t i a l...
Страница 137: ...Chapter 12 DDNS User s Guide 138 C o m p a n y C o n f i d e n t i a l...
Страница 138: ...139 PART III Security Firewall 141 Content Filtering 147 C o m p a n y C o n f i d e n t i a l...
Страница 139: ...140 C o m p a n y C o n f i d e n t i a l...
Страница 145: ...Chapter 13 Firewall User s Guide 146 C o m p a n y C o n f i d e n t i a l...
Страница 151: ...152 C o m p a n y C o n f i d e n t i a l...
Страница 155: ...Chapter 15 Static Route User s Guide 156 C o m p a n y C o n f i d e n t i a l...
Страница 167: ...Chapter 17 Remote Management User s Guide 168 C o m p a n y C o n f i d e n t i a l...
Страница 177: ...Chapter 18 UPnP User s Guide 178 C o m p a n y C o n f i d e n t i a l...
Страница 179: ...180 C o m p a n y C o n f i d e n t i a l...
Страница 185: ...Chapter 19 System User s Guide 186 C o m p a n y C o n f i d e n t i a l...
Страница 197: ...Chapter 22 Sys OP Mode User s Guide 198 C o m p a n y C o n f i d e n t i a l...
Страница 199: ...Chapter 23 Language User s Guide 200 C o m p a n y C o n f i d e n t i a l...
Страница 207: ...Chapter 24 Troubleshooting User s Guide 208 C o m p a n y C o n f i d e n t i a l...
Страница 209: ...210 C o m p a n y C o n f i d e n t i a l...
Страница 213: ...Appendix A Product Specifications User s Guide 214 C o m p a n y C o n f i d e n t i a l...
Страница 279: ...Index User s Guide 280 C o m p a n y C o n f i d e n t i a l...