Media Access Control

1. Introduction Media Access control address is a permanent/fixed address which is assigned to every hardware device connected to a network (wireless adapter, network interface card etc.) by the hardware manufacturer. Every device on a network has an ip address, IP is an internet protocol which give unique identity to the devices at network layer. IP address can be frequently changed. One the other side, MAC addresses are permanent and they work at layer 2 (data link layer). MAC Address is also known

physical layer, flow control and frame synchronization. The data link layer is divided into two sub layers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. Network (Layer 3) This layer provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. Routing and forwarding are functions of this layer, as well as addressing,internetworking, error handling, congestion control and packet sequencing

network devices with an address, and handling the flow control. Data link layer has two sub layer which is called media access control which is know as the computer unique identifier to which the network is assigned The mac address comes with a 48 bit address that is assign to it devices network interface card/.Second sub layer is llc which stand for logic link control, which is know as the multiplex functions that is process of over media access control To provide a means of exchanging data between end

Introduction Under the IEEE 802 standard, each one system interface gadget (counting system cards in machines, versatile Wi-Fi-empowered gadgets, and in addition individual ports in scaffolds or switches) ought to have an all-around extraordinary 48 bit MAC address. Pieces of locations ought to be bought by an association to be allotted to the gadgets that association produces. On the other hand, in a few cases a gadget might not have an internationally extraordinary MAC address. A few purposes behind

delay in sending the sensed data. In particular, military, mission critical and safety domains generally require rapid and/or real time data transfer. Therefore, some QoS feature would be required to give sensor network administrators the ability to control the overall network performance.

way. Two sets of standards, i.e. IEEE802.11p and IEEE 1609 series are proposed for this purpose including technical specifications for vehicular communications and networking. This project is focused on the performance evaluation of the medium access control (MAC) protocols for both vehicle-to-vehicle and vehicle-to-infrastructure communications. The network throughput in relation to back-off window size and other technical factors at the physical layers such as modulation and coding schemes and at

compared to Contention based Protocols. Bluetooth is an example of TDMA based protocol A. IEEE 802.11 Distributed Coordination Function IEEE 802.11(DCF) is widely used contention-based protocol in wireless sensor networks. The DCF is a random channel-access scheme where every station begins its transmission based on

The IEEE 802.11 is basically for the denial of service attacks and counter measures in wireless networks. The paper mainly focuses on security of 802.11 wireless networks. In this paper 802.11 standard is discussed with respect to frames types, contention resolution, physical layer convergence protocol (PLCP), Channels and security. The paper comprehensively discussed about the DOS attacks on IEEE 802.11 frame type of management. There are 15 DOS attacks discussed in this paper. We will identify

quantitative values, such as data rate, delay bound, and jitter bound. This quantitative value is expected to be met within the medium access control data service in the transferring of data frames in a Traffic Specification. Prioritized Quality of Service is expressed in the terms of relative delivery priority, which is used to be within the medium access control data service in the transfer of data frames between peer stations. The values of Quality of Service parameters such as data rate, delay

Introduction : This paper discusses about the S-MAC , which is a Medium Access Control Protocol used in wireless sensor networks . The protocol proposed in the paper is mainly inspired by PAMAS . The important goals of this protocol is to conserve energy and configure by itself or known as scalability . It is entirely different from traditional mac protocols like ieee 802.11. The protocol uses three primary techniques to support energy conserving and self-configuration . they periodically sleep