Subnets And Netmasks - Lucent Technologies SLC ConnectReach User & Service Manual

IP Network Addresses
IP Network Addresses Description

Subnets and Netmasks

Subnet description
Subnets are logical partitions of a single network. Subnets are created for
administrative or technical reasons, isolating similar network traffic or similar
network technology to one area of the network. RFC 950 explains the Internet
Standard Subnetting Procedure.
Subnets are created by partitioning the host field of the network address. Each
partition defines a subnet. For example, Class C networks use the last 8 bits to
define the host. To divide this network into two subnets with an equal number of
addresses in each, 1 bit of the host field is used. The broadcast address differs for
each subnet, thus broadcasts only reach those hosts in the subnet.
The following table lists some subnet examples.
1R
1HWZRUN 6XEQHWV 1R 6XEQHW %LWV
   
   
ZKHQ    WKURXJK  
ZKHQ    WKURXJK  
   
ZKHQ    WKURXJK  
ZKHQ    WKURXJK  
ZKHQ    WKURXJK   
ZKHQ     WKURXJK  
ZKHQ    WKURXJK  
ZKHQ    WKURXJK   
ZKHQ     WKURXJK  
ZKHQ    WKURXJK  
363-208-050
%URDGFDVW
$GGUHVV
 
 
 
 
 
  
 
 
  
 
 
Issue 4 June 2002 A-7