VES-1616F/1624F-44 User’s Guide
282
Appendix B IP Addresses and Subnetting
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 (192.168.1.0 for
example). An IP address with host IDs of all ones is the broadcast address for that network
(192.168.1.255 for example). 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.
IP Address Classes and Network ID
The value of the first octet of an IP address determines the class of an address.
• Class A addresses have a
0
in the leftmost bit.
• Class B addresses have a
1
in the leftmost bit and a
0
in the next leftmost bit.
• Class C addresses start with
1 1 0
in the first three leftmost bits.
• Class D addresses begin with
1 1 1 0
. Class D addresses are used for multicasting, which
is used to send information to groups of computers.
• There is also a class E. It is reserved for future use.
The following table shows the allowed ranges for the first octet of each class. This range
determines the number of subnets you can have in a network.
Table 96
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
Table 97
Allowed IP Address Range By Class
CLASS
ALLOWED RANGE OF FIRST OCTET (BINARY)
ALLOWED RANGE OF FIRST
OCTET (DECIMAL)
Class A
0
0000000 to
0
1111111
0 to 127
Class B
10
000000 to
10
111111
128 to 191
Class C
110
00000 to
110
11111
192 to 223
Class D
1110
0000 to
1110
1111
224 to 239
Class E
(reserved)
1111
0000 to
1111
1111
240 to 255
Содержание VES-1616F-44
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Страница 9: ...VES 1616F 1624F 44 User s Guide 8 Customer Support...
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Страница 35: ...VES 1616F 1624F 44 User s Guide 34 Chapter 1 Getting to Know Your Switch Figure 2 Curbside Application...
Страница 53: ...VES 1616F 1624F 44 User s Guide 52 Chapter 4 The Web Configurator...
Страница 63: ...VES 1616F 1624F 44 User s Guide 62 Chapter 5 System Status and Port Statistics...
Страница 87: ...VES 1616F 1624F 44 User s Guide 86 Chapter 7 VLAN Figure 35 VLAN Static VLAN Port Isolation Setup All Connected...
Страница 90: ...VES 1616F 1624F 44 User s Guide Chapter 7 VLAN 89 Figure 37 Port Based VLAN Setup All Connected...
Страница 93: ...VES 1616F 1624F 44 User s Guide 92 Chapter 7 VLAN...
Страница 103: ...VES 1616F 1624F 44 User s Guide 102 Chapter 10 Spanning Tree Protocol...
Страница 117: ...VES 1616F 1624F 44 User s Guide 116 Chapter 15 Port Authentication...
Страница 139: ...VES 1616F 1624F 44 User s Guide 138 Chapter 18 Queuing Method...
Страница 145: ...VES 1616F 1624F 44 User s Guide 144 Chapter 19 Classifier...
Страница 150: ...VES 1616F 1624F 44 User s Guide Chapter 20 Policy 149 Figure 73 Policy Example...
Страница 151: ...VES 1616F 1624F 44 User s Guide 150 Chapter 20 Policy...
Страница 157: ...VES 1616F 1624F 44 User s Guide 156 Chapter 21 VLAN Stacking...
Страница 165: ...VES 1616F 1624F 44 User s Guide 164 Chapter 22 Multicast...
Страница 173: ...VES 1616F 1624F 44 User s Guide 172 Chapter 23 Multicast VLAN Registration...
Страница 177: ...VES 1616F 1624F 44 User s Guide 176 Chapter 24 DHCP...
Страница 181: ...VES 1616F 1624F 44 User s Guide 180 Chapter 25 Differentiated Services...
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Страница 183: ...VES 1616F 1624F 44 User s Guide 182 Chapter 25 Differentiated Services...
Страница 193: ...VES 1616F 1624F 44 User s Guide 192 Chapter 27 Maintenance...
Страница 195: ...VES 1616F 1624F 44 User s Guide 194 Chapter 28 Diagnostic...
Страница 199: ...VES 1616F 1624F 44 User s Guide 198 Chapter 29 Syslog...
Страница 259: ...VES 1616F 1624F 44 User s Guide 258 Chapter 33 Command Examples...
Страница 267: ...VES 1616F 1624F 44 User s Guide 266 Chapter 34 IEEE 802 1Q Tagged VLAN Commands...
Страница 277: ...VES 1616F 1624F 44 User s Guide 276 Chapter 35 Troubleshooting...
Страница 281: ...VES 1616F 1624F 44 User s Guide 280 Product Specifications...