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broadcast address (redirected from 255.255.255)
broadcast addressAn address that enables transmission to every node in a local network. The address is the highest numeric value of the address format being used. An Ethernet broadcast address is all binary 1's. An IP broadcast address is the highest number in its class; for example, the broadcast address of a Class C 192.168.16.0 network is 192.168.16.255.
Subnet Broadcast Addresses
The broadcast address for a subnet must account for the part of the address that is reserved for the subnet. Using the above Class C example configured for six subnets would have a broadcast address of 192.168.16.31. It is derived as follows. For more on the Class C example, see subnet mask. See broadcast and multicast.
Class C Mask for Six Subnets 255 255 255 224
Step 1Invert the mask.0 0 0 31
Step 2OR the inverted mask with an IPaddress in the subnet, such as192.168.16.1. 192 168 16 1
192 168 16 31
References in periodicals archive
numbers and has a range of 0.0.0.0 to 255.255.255
vlan 85 name Client_PREMLNV_Provider1 vlan 86 name Client1_PREMINV_Provider2 vlan 87 name Client2_ PREMINV_Provider2 interface FastEthernet1/0/1 description PREMINV_Provider1 switchport access vlan 85 switchport mode access interface FastEthernet1/0/2 description PREMINV_Provider2 switchport trunk encapsulation dot1q switchport trunk allowed vlan 86,87 switchport mode trunk interface Vlan85 description Client_PREMINV_Provider1 ip address 220.127.116.11 255.255.255
.252 interface Vlan86 description Client1_PREMINV_Provider2 ip address 18.104.22.168 255.255.255
.252 interface Vlan87 description Client2_PREMINV_Provider2 ip address 22.214.171.124 255.255.255
For the common Class C addresses, where the first three octets represent the network address and the last octet represents the host/node number on that network, the subnet mask would be 255.255.255
If you left the IP address unchanged, leave the subnet mask unchanged at 255.255.255
Valid addresses range from 0.0.0.0 to 255.255.255.255.
Class C networks, the most common, use the subnet mask 255.255.255.0.