P-660HW-T v2 User’s Guide
Appendix H IP Addresses and Subnetting
272
Host IDs of all zeros represent the subnet itself and host IDs of all ones are the broadcast
address for that subnet, so the actual number of hosts available on each subnet in the example
above is 2
7
– 2 or 126 hosts for each subnet.
192.168.1.0 with mask 255.255.255.128 is the subnet itself, and 192.168.1.127 with mask
255.255.255.128 is the directed broadcast address for the first subnet. Therefore, the lowest IP
address that can be assigned to an actual host for the first subnet is 192.168.1.1 and the highest
is 192.168.1.126. Similarly the host ID range for the second subnet is 192.168.1.129 to
192.168.1.254.
Example: Four Subnets
The above example illustrated using a 25-bit subnet mask to divide a class “C” address space
into two subnets. Similarly to divide a class “C” address into four subnets, you need to
“borrow” two host ID bits to give four possible combinations (00, 01, 10 and 11). The subnet
mask is 26 bits (11111111.11111111.11111111.
11
000000) or 255.255.255.192. Each subnet
contains 6 host ID bits, giving 2
6
-2 or 62 hosts for each subnet (all zeroes is the subnet itself,
all ones is the broadcast address on the subnet).
Subnet Address: 192.168.1.0
Lowest Host ID: 192.168.1.1
Broadcast Address:
192.168.1.127
Highest Host ID: 192.168.1.126
Table 106
Subnet 2
IP/SUBNET MASK
NETWORK NUMBER
LAST OCTET BIT VALUE
IP Address
192.168.1.
128
IP Address (Binary)
11000000.10101000.00000001.
1
0000000
Subnet Mask
255.255.255.
128
Subnet Mask (Binary)
11111111.11111111.11111111.
1
0000000
Subnet Address:
192.168.1.128
Lowest Host ID: 192.168.1.129
Broadcast Address:
192.168.1.255
Highest Host ID: 192.168.1.254
Table 105
Subnet 1 (continued)
IP/SUBNET MASK
NETWORK NUMBER
LAST OCTET BIT
VALUE
Table 107
Subnet 1
IP/SUBNET MASK
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address
192.168.1.
0
IP Address (Binary)
11000000.10101000.00000001.
00
000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11
000000
Содержание VSG-1200 V2
Страница 1: ...VSG 1200 V2 Vantage Service Gateway User s Guide Version 1 00 10 2006 Edition 1 ...
Страница 6: ...VSG 1200 V2 User s Guide Safety Warnings 6 ...
Страница 19: ...VSG 1200 V2 User s Guide 19 Table of Contents ...
Страница 25: ...VSG 1200 V2 User s Guide 25 List of Figures ...
Страница 29: ...VSG 1200 V2 User s Guide 29 List of Tables ...
Страница 37: ...VSG 1200 V2 User s Guide 37 Chapter 1 Getting to Know Your VSG ...
Страница 49: ...VSG 1200 V2 User s Guide 49 Chapter 3 The Web Configurator ...
Страница 55: ...VSG 1200 V2 User s Guide 55 Chapter 4 Initial Setup Example ...
Страница 69: ...VSG 1200 V2 User s Guide 69 Chapter 6 LAN and WAN Setup ...
Страница 83: ...VSG 1200 V2 User s Guide 83 Chapter 9 Authentication Figure 32 System Settings Authentication ...
Страница 111: ...VSG 1200 V2 User s Guide 111 Chapter 12 Dynamic Subscriber Accounts ...
Страница 115: ...VSG 1200 V2 User s Guide 115 Chapter 13 Port Location Mapping ...
Страница 147: ...VSG 1200 V2 User s Guide 147 Chapter 16 Bandwidth Management ...
Страница 167: ...VSG 1200 V2 User s Guide 167 Chapter 22 Static Route ...
Страница 175: ...VSG 1200 V2 User s Guide 175 Chapter 24 Syslog ...
Страница 181: ...VSG 1200 V2 User s Guide 181 Chapter 26 SNMP ...
Страница 195: ...VSG 1200 V2 User s Guide 195 Chapter 28 System Status ...
Страница 213: ...VSG 1200 V2 User s Guide 213 Chapter 31 SSL Certificate ...
Страница 229: ...VSG 1200 V2 User s Guide 229 Chapter 32 Using The SMT ...
Страница 239: ...VSG 1200 V2 User s Guide 239 Appendix B IP Address Assignment Conflicts ...
Страница 241: ...VSG 1200 V2 User s Guide 241 Appendix C Subscriber Login ...
Страница 245: ...VSG 1200 V2 User s Guide 245 Appendix D Vendor Specific Attributes ...
Страница 255: ...VSG 1200 V2 User s Guide 255 Appendix F Cable Types and Cable Pin Assignments ...
Страница 267: ...VSG 1200 V2 User s Guide 267 Appendix G Setting up Your Computer s IP Address ...