Under which of the following layers of the TCP IP model do ATM cells operate?

ATM operates at the data link layer—Layer 2 in the OSI model—over either fiber or twisted-pair cable.

What is ATM and compare it with OSI layer?

OSI was used for transmission over unreliable medium while ATM is used for reliable transmission as it employs error detection and correction mechanism.

At which layer of the OSI model does a NIC operate?

Physical Layer
Network Interface Cards (NICs), Repeaters and Hubs operate primarily in the Physical Layer. Data-Link Layer – this layer communicates via chunks of data called frames.

What falls under Layer 3 of the OSI model?

Layer 3 of the OSI Model: Network Layer provides the functional and procedural means of transferring variable length data sequences from a source host on one network to a destination host on a different network, while maintaining the quality of service requested by the transport layer (in contrast to the data link …

What are ATM cells?

A cell is the basic data unit of the ATM (Asynchronous Transfer Mode) protocol. Cells contain identifiers known as VCI (Virtual Channel Identifier) and VPI (Virtual Path Identifier) to associate the cells with a logical data stream. Each cell consists of a 5 byte header and 48 bytes of payload.

What is ATM WAN?

A wide-area network (WAN) technology, asynchronous transfer mode (ATM) is a transfer mode for switching and transmission that efficiently and flexibly organizes information into cells; it is asynchronous in the sense that the recurrence of cells depends on the required or instantaneous bit rate.

Is ATM a packet switched network?

ATM is a connection-oriented and packet-switched technology, which emerged in the 1980s. Data in ATM is transmitted in small packets, called cells, which have a fixed size of 48 bytes payload and 5 bytes header. To set up a connection, a path through the network, a virtual circuit, is established first.

Which two layers does a NIC operate on?

The network interface card operates on layer two of the OSI model- the Data Link Layer. They reside on this layer because they work with media access control addresses (abbreviated as MAC). Every single NIC has a unique number on it.

Is a NIC Layer 1?

A NIC provides operations up to layer 2 of the OSI model. The NIC’s interface itself is a Physical layer (layer 1) device, the physical address (also known as MAC address) of the adapter as well as the drivers to control the NIC are located at the Data Link layer’s MAC sub-layer.