Ethernet is the most widely installed local area network (LAN) technology. Ethernet is a link layer protocol in the TCP/IP stack , describing how networked devices can format data for transmission to other network devices on the same network segment, and how to put that data out on the network connection. It touches both Layer 1 (the physical
Jan 28, 2020 · Both frame types have the same fields except for the 2-byte EtherType field of Ethernet II which is different from the Length field of IEEE 802.3. The Ethernet II and IEEE 802.3 aren’t compatible and won’t work with each other if both frame types are used in a LAN network. So simply, every time your computer receives an Ethernet frame, it looks at the 2-byte-long header field right after the Source MAC. If the value in this field is 1500 or less, this is a 802.2 LLC or SNAP frame, and the field is to be interpreted as Length. To distinguish the style of Ethernet header, the Ethernet Type field values begin at 1536, and the length of the Data field in an IEEE frame is limited to decimal 1500 or less. That way, an Ethernet NIC can easily determine whether the frame follows the DIX or original IEEE format. Jan 27, 2019 · The frame composition is dependent on the media access type. For example, if the upper layer protocols are TCP and IP and the media access is Ethernet, then the Layer 2 frame encapsulation will be Ethernet II. This is typical for a LAN environment. When learning about Layer 2 concepts, it is helpful to analyze frame header information. The ability to migrate the original implementation of Ethernet to current and future Ethernet implementations is based on the practically unchanged structure of the Layer 2 frame. Physical media, media access, and media control have all evolved and continue to do so. But the Ethernet frame header and trailer have essentially remained constant. This field is 2 bytes long. 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.
Apr 13, 2018 · The computer receives the Ethernet frame, examines the destination MAC address against its own MAC address, and notices that that is a match and receives the rest of the frame. 5.2.1.5 – Video Demonstration – Sending a Frame to the Default Gateway
Introduction 3 Figure 1.2: Protocol overhead in the OSI model 1.2 LAN A local network (Local Area Network (LAN)) has been developed to ensure communication between computers, work stations and peripherals in an area of a very limited geographical Ethernet frame types include Ethernet 802.3, Ethernet 802.2, Ethernet II, and Ethernet SNAP. When two systems need to communicate on an Ethernet network, they must be using a common frame format. The confusion as to when a given Ethernet frame type is used is generally a result of different vendors and standards bodies moving in different AmazonBasics RJ45 Cat-5e Network Ethernet Cable - 50 Feet (15.2 Meters) 4.6 out of 5 stars 6,830. $10.49 $ 10. 49. TBMax Cat6 Ethernet Cable Flat 50ft - Cat 6 Network Ethernet frame types. There are several types of Ethernet frames. The different frame types have different formats and MTU values, but can coexist on the same physical medium. The Ethernet Version 2 [note 3] or Ethernet II frame or DIX frame is the most common type in use today, as it is often used directly by the Internet Protocol.
Ethernet II frame, or Ethernet Version 2, or DIX frame is the most common type in use today, as it is often used directly by the Internet Protocol. Novell raw IEEE 802.3 non-standard variation frame IEEE 802.2 Logical Link Control (LLC) frame
An Ethernet frame works in a similar way. It is a container for data with a source and destination address to deliver information, called the payload, between two locations on the same network.