Chapter 5- 5.1.3 Ethernet MAC

Broadcast

1.A broadcast packet contains a destination IP address that has all ones (1s) in the host portion. like ip:192.168.1.255 2.This numbering in the address means that all hosts on that local network (broadcast domain) will receive and process the packet, except the sending host. 3.Many network protocols, such as DHCP and Address Resolution Protocol (ARP), use broadcasts. 4. On Ethernet networks, the broadcast MAC address is 48 ones displayed as hexadecimal FF-FF-FF-FF-FF-FF

Multicast (need to Memorize !!!)

1.The range of IPv4 multicast addresses is 224.0.0.0 to 239.255.255.255. 2. The multicast MAC address is a special value that begins with 01-00-5E in hexadecimal. 3.Because multicast addresses represent a group of addresses (sometimes called a host group), they can only be used as the destination of a packet. 4.The source will always have a unicast address. 5.the multicast IP address requires a corresponding multicast MAC address to actually deliver frames on a local network. 6.Multicast addresses would be used in remote gaming, where many players are connected remotely but playing the same game 7.Another use of multicast addresses is in distance learning through video conferencing, where many students are connected to the same class.