P-660HWP-Dx User’s Guide
35
A
P P E N D I X
E
IP Subnetting
This appendix introduces addresses, IP address classes and subnet masks.
Introduction to IP Addresses
An IP address is made up of four octets, written in dotted decimal notation (for example,
192.168.1.1). An octet is an 8-digit binary number. Therefore, each octet has a possible range
of 00000000 to 11111111 in binary, or 0 to 256 in decimal.
An IP address has two parts: the network number and the host ID. Routers use the network
number to send packets to the correct network, while the host ID identifies a single device on
the network.
IP Address Classes and Hosts
The class of an IP address determines the number of hosts you can have on your network.
• In a class A address the first octet is the network number, and the remaining three octets
are the host ID.
• In a class B address the first two octets make up the network number, and the two
remaining octets make up the host ID.
• In a class C address the first three octets make up the network number, and the last octet is
the host ID.
The following table shows the network number and host ID arrangement for classes A, B and
C.
An IP address with host IDs of all zeros is the IP address of the network. An IP address with
host IDs of all ones is the broadcast address for that network. Therefore, to determine the total
number of hosts allowed in a network, deduct two as shown next:
• A class C address (1 host octet:
8 host bits) can have 2
8
– 2, or 254 hosts.
• A class B address (2 host octets: 16 host bits) can have 2
16
– 2, or 65534 hosts.
A class A address (3 host octets: 24 host bits) can have 2
24
– 2 hosts, or approximately 16
million hosts.
Table 154
Classes of IP Addresses
IP ADDRESS
OCTET 1
OCTET 2
OCTET 3
OCTET 4
Class A
Network number
Host ID
Host ID
Host ID
Class B
Network number Network number
Host ID
Host ID
Class C
Network number Network number
Network number
Host ID
Содержание 802.11g HomePlug AV ADSL2+ Gateway P-660HWP-Dx
Страница 2: ......
Страница 7: ...Safety Warnings P 660HWP Dx User s Guide 39 ...
Страница 8: ...Safety Warnings P 660HWP Dx User s Guide 40 ...
Страница 10: ...Contents Overview P 660HWP Dx User s Guide 36 ...
Страница 20: ...Table of Contents P 660HWP Dx User s Guide 44 ...
Страница 32: ...List of Tables P 660HWP Dx User s Guide 40 ...
Страница 33: ...35 PART I Introduction Introducing the P 660HWP Dx 35 Introducing the Web Configurator 43 ...
Страница 34: ...36 ...
Страница 41: ...Chapter 1 Introducing the P 660HWP Dx P 660HWP Dx User s Guide 41 Figure 7 P 660HWP Dx with ISDN ...
Страница 42: ...Chapter 1 Introducing the P 660HWP Dx P 660HWP Dx User s Guide 42 ...
Страница 56: ...Chapter 2 Introducing the Web Configurator P 660HWP Dx User s Guide 48 ...
Страница 57: ...35 PART II Wizards Wizard Setup for Internet Wireless Access 59 Bandwidth Management Wizard 73 ...
Страница 58: ...36 ...
Страница 78: ...Chapter 4 Bandwidth Management Wizard P 660HWP Dx User s Guide 54 ...
Страница 80: ...36 ...
Страница 98: ...Chapter 5 WAN Setup P 660HWP Dx User s Guide 52 ...
Страница 142: ...Chapter 8 Powerline P 660HWP Dx User s Guide 42 ...
Страница 155: ...35 PART IV Security Firewalls 157 Firewall Configuration 169 Content Filtering 191 Certificates 195 ...
Страница 156: ...36 ...
Страница 176: ...Chapter 11 Firewall Configuration P 660HWP Dx User s Guide 54 Figure 99 Firewall Edit Rule ...
Страница 190: ...Chapter 11 Firewall Configuration P 660HWP Dx User s Guide 68 ...
Страница 194: ...Chapter 12 Content Filtering P 660HWP Dx User s Guide 72 ...
Страница 218: ...36 ...
Страница 222: ...Chapter 14 Static Route P 660HWP Dx User s Guide 38 ...
Страница 238: ...Chapter 16 Dynamic DNS Setup P 660HWP Dx User s Guide 38 ...
Страница 250: ...Chapter 17 Remote Management Configuration P 660HWP Dx User s Guide 46 ...
Страница 262: ...Chapter 18 Universal Plug and Play UPnP P 660HWP Dx User s Guide 58 ...
Страница 263: ...35 PART VI Maintenance and Troubleshooting System 265 Logs 271 Tools 289 Diagnostic 295 Troubleshooting 297 ...
Страница 264: ...36 ...
Страница 270: ...Chapter 19 System P 660HWP Dx User s Guide 40 ...
Страница 288: ...Chapter 20 Logs P 660HWP Dx User s Guide 52 ...
Страница 294: ...Chapter 21 Tools P 660HWP Dx User s Guide 40 ...
Страница 304: ...36 ...
Страница 340: ...Appendix C Internal SPTGEN P 660HWP Dx User s Guide 50 ...
Страница 364: ...Appendix E IP Subnetting P 660HWP Dx User s Guide 42 ...
Страница 368: ...Appendix F Command Interpreter P 660HWP Dx User s Guide 38 ...
Страница 388: ...Appendix K Legal Information P 660HWP Dx User s Guide 38 ...
Страница 394: ...Appendix L Customer Support P 660HWP Dx User s Guide 40 ...
Страница 402: ...Index P 660HWP Dx User s Guide 42 ...