The frames transmitted over an access interfaceĪre normal Ethernet frames. Printer, a file server, or a security camera. To a network device such as a desktop computer, an IP telephone, a By default, all ports on a switch are in access mode. The frames transmitted over an access interface are normal Ethernetįrames. The ports, or interfaces, on a switch operate in eitherĪccess mode, tagged-access, or trunk mode:ĭevice such as a desktop computer, an IP telephone, a printer, a file Same physical link can uniquely identify one another. That are assigned to all ports on a switch, multiple devices on the Media access control (MAC) sublayer, which governs protocolĪccess to the physical network medium. Logical link control (LLC) sublayer, which is responsibleįor managing communications links and handling frame traffic. Network wherein every device communicates using the same physical A network segment is a portion of a computer On a VLAN,Ī frame whose origin and destination are in the same VLAN are forwarded One network segment to another by nodes in the network. Without bridging and VLANs, allĭevices on the Ethernet LAN are in a single broadcast domain, andĪll the devices detect all the packets on the LAN.įorwarding is the relaying of packets from Grouping of devices on a VLAN is independent of where the devicesĪre physically located in the LAN. Group together related devices into separate network segments. The LAN, creating VLANs, which are independent logical networks that Bridging creates separate broadcast domains on Segments of a LAN can be linked at the frame level using bridges. A broadcast domain is a logicalĭivision of a network in which all nodes of that network can be reached Network uses some frames to control the data link itself.Īt Layer 2, unicast refers to sending framesįrom one node to a single other node, whereas multicast denotes sending traffic from one node to multiple nodes, and broadcasting refers to the transmission of frames to all Have a defined structure and can be used for error detection, control Frames are transmitted to and receivedįrom devices on the same local area network (LAN).
Layer2 is the network layer used to transferĭata between adjacent network nodes in a wide area network or betweenĪ frame is a protocol data unit, the smallest Layer 2 is equivalent to the link layer (the lowest layer)
Level in the seven-layer OSI reference model for network protocolĭesign. Layer 2, also known as the Data Link Layer, is the second
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