What is a layer 2 frame?
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. The data link layer is concerned with local delivery of frames between nodes on the same level of the network.
What are different types of Ethernet frames?
There are basically two different frame types on Ethernet networks, Ethernet II or IEEE 802.3. The IEEE 802.3 frame can be encapsulated in an IEEE 802.2 LLC frame, or a SNAP frame. All four frame types are enabled by default and your Network Print Server will automatically adapt to the frame type used in the network.
What is the size of layer 2 header?
Like the 802.3 spec, the Version II spec defines a Data Link Header consisting of 14 bytes (6+6+2) of information, but the Version II spec does not specify an LLC header. The first six bytes of an Ethernet frame make up the Destination Address.
What is frame type field?
Type field This field stores information about the protocol of the upper layer (network layer). The Data Link layer of the source computer prepares, packs and loads the Ethernet frame in the media. The Data link layer of the destination computer picks the Ethernet frame from the media.
What layer are segments used?
In data communications networks, packet segmentation is the process of dividing a data packet into smaller units for transmission over the network. Packet segmentation happens at layer four of the OSI model; the transport layer.
What is the 2 byte type field used for in an Ethernet frame?
Length – Length is a 2-Byte field, which indicates the length of entire Ethernet frame. This 16-bit field can hold the length value between 0 to 65534, but length cannot be larger than 1500 because of some own limitations of Ethernet. Data – This is the place where actual data is inserted, also known as Payload.
What are the Ethernet physical layer standards?
Ethernet Physical Layer
| Speed | Common Name | Formal IEEE Standard Name |
|---|---|---|
| 10 Mbps | Ethernet | 802.3 |
| 100 Mbps | FastEthernet | 802.3u |
| 1 Gbps | GigabitEthernet | 802.3ab |
| 10 Gbps | 10 GE | 802.3an |
What is the 2-byte type field used for in an Ethernet frame?
What is a frame header?
Frame Header: It contains the source and the destination addresses of the frame and the control bytes. Payload field: It contains the message to be delivered. It is also called a Frame Check Sequence (FCS). Flag: Two flag at the two ends mark the beginning and the end of the frame.
What is frame type Ethernet?
From Wikipedia, the free encyclopedia. EtherType is a two-octet field in an Ethernet frame. It is used to indicate which protocol is encapsulated in the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed.
What layer is a frame?
data link layer
In the OSI model of computer networking, a frame is the protocol data unit at the data link layer. Frames are the result of the final layer of encapsulation before the data is transmitted over the physical layer.
How are frames used in a layer 2 network?
A frame is a protocol data unit, the smallest unit of bits on a Layer 2 network. Frames are transmitted to and received from devices on the same local area network (LAN). Unilke bits, frames have a defined structure and can be used for error detection, control plane activities and so forth. Not all frames carry user data.
What are the two sublayers of Layer 2?
A network segment is a portion of a computer network wherein every device communicates using the same physical layer. Layer 2 contains two sublayers: Logical link control (LLC) sublayer, which is responsible for managing communications links and handling frame traffic.
What is the meaning of Layer 2 in OSI?
Layer 2, also known as the Data Link Layer, is the second level in the seven-layer OSI reference model for network protocol design. Layer 2 is equivalent to the link layer (the lowest layer) in the TCP/IP network model.
What are the different formats for Ethernet frame?
There are different formats available for Ethernet Frame. The format of most widely used Ethernet frame these days is explained below. The data packets from layer 3 (Network layer) is moved down to Layer 2 (Datalink Layer) as data moves down the TCP/IP protocol stack at Sender.