CompTIA Netowrk+ (N10-008) Types of Casting

Question 1

What is Broadcasting?

Answer 1

Broad cast − Transmitting data from one host to many host (one-all)

Transmitting data from one source host to all other hosts present in the same or other network is called broadcast. It is called a one to all transmission.

Question 2

What is a Unicasting?

Answer 2

Unicast − Transmitting data from one host to another host (one-one)

Question 3

What is Multi-casting?

Answer 3

Multicasting addresses messages for a specific group of devices in a network. Note that, even if a group contains all the devices in a network, multicast is theoretically different from the broadcast. This difference consists that, in the multicast case, devices effectively subscribe to receive messages. In the broadcast case, however, devices receive messages regardless of whether or not they want to.

Question 4

What is Anycast?

Answer 4

With multicast you can send one message to a group of receivers. This is the main definition for multicast. There is also Anycast Message that the packet is sent to the closest host between the destinations that has the same IP address. Multicast is used with Multicast Groups in IP networks.

The anycast addressing method forwards messages to a single device of a specific group of devices. Typically, considering the sender’s position, the topologically nearest device of the aimed anycast group will receive the message. In our party (network) example, we can comprehend anycast communication when a person (sender) will leave the party but first wants to say goodbye to the hosts (anycast group). As the party is going on and most of the hosts are occupied with several guests, it is okay to say goodbye to a single one. So, the person looks around and finds the closest party host (destination), thanks for the party, and goes away.