Appendix G IP Addresses and Subnetting
ZyXEL NWA-3100 User’s Guide
268
Figure 192
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).
By convention, subnet masks always consist of a continuous sequence of ones beginning from
the leftmost bit of the mask, followed by a continuous sequence of zeros, for a total number of
32 bits.
Subnet masks can be referred to by the size of the network number part (the bits with a “1”
value). For example, an “8-bit mask” means that the first 8 bits of the mask are ones and the
remaining 24 bits are zeroes.
Table 92
Subnet Masks
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
Network Number
11000000
10101000
00000001
Host ID
00000010
Содержание NWA-3100
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Страница 7: ...Safety Warnings ZyXEL NWA 3100 User s Guide 7...
Страница 8: ...Safety Warnings ZyXEL NWA 3100 User s Guide 8...
Страница 10: ...Contents Overview ZyXEL NWA 3100 User s Guide 10...
Страница 24: ...List of Figures ZyXEL NWA 3100 User s Guide 24...
Страница 28: ...List of Tables ZyXEL NWA 3100 User s Guide 28...
Страница 29: ...29 PART I Introduction Introducing the ZyXEL Device 31 Introducing the Web Configurator 39 Tutorial 43...
Страница 30: ...30...
Страница 60: ...Chapter 3 Tutorial ZyXEL NWA 3100 User s Guide 60...
Страница 62: ...62...
Страница 104: ...Chapter 7 MBSSID and SSID ZyXEL NWA 3100 User s Guide 104...
Страница 116: ...Chapter 9 IP Screen ZyXEL NWA 3100 User s Guide 116...
Страница 132: ...Chapter 11 Remote Management ZyXEL NWA 3100 User s Guide 132...
Страница 150: ...Chapter 12 Certificates ZyXEL NWA 3100 User s Guide 150...
Страница 174: ...Chapter 14 VLAN ZyXEL NWA 3100 User s Guide 174...
Страница 184: ...Chapter 15 Maintenance ZyXEL NWA 3100 User s Guide 184...
Страница 186: ...186...
Страница 198: ...Chapter 20 System Password ZyXEL NWA 3100 User s Guide 198...
Страница 228: ...228...
Страница 232: ...Appendix A Product Specifications ZyXEL NWA 3100 User s Guide 232...
Страница 244: ...Appendix B Setting up Your Computer s IP Address ZyXEL NWA 3100 User s Guide 244...
Страница 248: ...Appendix C IP Address Assignment Conflicts ZyXEL NWA 3100 User s Guide 248...
Страница 258: ...Appendix D Wireless LANs ZyXEL NWA 3100 User s Guide 258...
Страница 282: ...Appendix H Text File Based Auto Configuration ZyXEL NWA 3100 User s Guide 282...
Страница 286: ...Appendix I Legal Information ZyXEL NWA 3100 User s Guide 286...