Hardware in OSI Reference Model: Layer 2

This guide covers hardware in osi reference model: layer 2 with practical context and easy-to-follow details. Use it to understand the subject and apply the information confidently.

Russell Hitchcock

1. Control logical links
2. Control access to the environment
3. Frame data
4. Addressing
5. Error detected

Control logical links (Logical Link Control - LLC) Logical Link Control (LLC) is often referred to as a subclass of data link layer (DLL), as opposed to the functionality of DLLs, this LLC subclass is primarily involved in concatenating protocols for submissions. MAC (access control environment). LLC performs this task by dividing the data sent into smaller data frames and adding additional descriptive information about the frame, called frame headers or headers. Media access control (Media Access Control - MAC) Like LLC, Media Access Control (MAC) is also considered a subclass of DLL but contrary to the functionality of the DLL, including in this subclass is the MAC address. The MAC address provides this subclass with a unique identifier so that each network access point can communicate with the network. MAC sublayer is also responsible for accessing network cables, or communication environments. Frame data If someone sends data to a network. The recipient will have to know how and when to read the data. This problem can occur in a number of ways and is the only purpose of framing. In general terms, framing is the way of organizing data to be transmitted and to identify this data as instructional information, called headers. What and how much information is contained within the headers can be identified by the protocol used on the network, just like Ethernet. The structure of a frame closely related to the Ethernet protocol is shown in Figure 1 below.

Figure 1: Ethernet frame structure

Hardware in OSI reference model: Layer 2