Broadcast and multicast

Apply to UDP only

1, three types of IP addresses, unicast, broadcast, multicast

2, limited broadcast 255.255.255.255 Route not forwarded

Webcast netid.255.255.255 Class A, without subnetting

Subnet broadcast host number is 1

All subnet broadcast Subnet number host number is 1 mesh

3. Ping 255.255.255.255

Arp-a

4. Multicast Class D Address

IGMP

The basis of multicasting is the concept of a process that joins a multicast group on a given interface of a host

Dns

DNS Server/etc/resolv.conf

Host File

Broadcast and multicast