Several statements regarding MAC protocols are give below. Indicate the true statements. All packets are

assumed to be of fixed size and take exactly one unit of time to transmit.

In Aloha protocol, nodes transmit when they sense the channel to be idle.

In Aloha protocol, nodes are assumed to detection collision.

In Aloha protocol, a node's transmission is successful if there is no transmission by other nodes in the time unit prior its

transmission and in the time unit during its transmission.

In slotted Aloha, nodes begin to transmit only at certain time instances.

In slotted Aloha, a node's transmission is successful if there is no transmission by other nodes in the time unit prior its

transmission and in the time unit during its transmission.

In Aloha and slotted Aloha, a node retransmits its frame immediately after encountering collision to keep the channel

busy.

Master$-$slave protocol is useful when there are multiple peer devices that communicate infrequently.

In Token Ring, loss of the token is a single point of failure.

In Ethernet protocol, nodes that encountered collision to their transmissions back off for random amount of times

based on their frame types.

In Ethernet protocol, a node encountering a busy channel, transmits after the channel is sensed to be idle without using

any random backoff.