Wave Wireless Networking SPEEDLAN TM 6000, Руководство оператора

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SPEEDLAN TM
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In fact, IP defines five classes:
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Class A addresses use 8 bits (1 octet) for the network portion and 24 bits (3 octets) for the node
(or host) section of the address. This provides up to 128 networks with 16.7 million nodes for each
network.
•
First byte is assigned as network address
•
Remaining bytes used for node addresses
•
Format: network, node, node, node
•
In IP address 49.22.102.70, “49” is network address and “22.102.70” is the node
address – all machines on this network have the “49” network address assigned to them
•
Maximum of 224 or 16,777,216 nodes
•
Class B addresses use 16 bits (two octets) for the network portion and 16 bits for the node (or
host) section of the address. This provides up to 16, 384 networks with 64,534 nodes for each
network.
•
First two bytes are assigned as network address
•
Remaining bytes used for node addresses
•
Format: network, network, node, node
•
In IP address 130.57.30.56, “130.57” is the network address, and “30.56” is the
node address
•
Maximum of 216 or a total of 65,534 nodes
•
Class C addresses use 24 bits (3 octets) for the network portion and 8 bits (two octets) for the
node (or host) section of the address. This provides 16.7 million networks with 256 nodes for each
network.
•
First three bytes are assigned as network address
•
Remaining byte used for node address
•
Format: network, network, network, node
•
In IP address 198.21.74.102, “198.21.74” is the network address, and “102” is the
node address
•
Maximum of 28 or 254 node addresses
•
Class D
•
Range is 224.0.0.0 to 239.255.255.255
•
Used for multicast packets (i.e., host sends out router discovery packets to learn all of the
routers on the network)
•
Class E
•
Range is 240.0.0.0 to 255.255.255.255
•
Reserved for future use
Note: Class D & E should NOT be assigned to net assignment of IP addresses. In addition, the
first octet, 127, is reserved.In each network definition, the first node number (i.e., “0”) is used to
define the network, as well as the last number (i.e., “255”). The last number is known as the
broadcast address.
Public IP addresses can be obtained from the following address:
Network Solutions
InterNIC Registration Services
505 Huntmar Park Drive
Herndon, VA 22070
hostmaster@internic.net