2/19/2023 0 Comments Mac ethernet![]() ![]() ![]() The function of the source address is to allow address-learning Addresses do not denote specific positions within the network topology. In this scheme blocks of addresses are allocated, and usually used on a first-come first-served basis. The MAC address space is unstructured, in comparison to a hierarchical method. Layer protocol to identify the sender in a packet capture. This allows each vendor to assign their own interface serial numbers (this is a flat addressing scheme), but also allows protocol monitors to examine the first 3 bytes of a frame address to determine the manufacturer of the interface card being used. ![]() the first 3 bytes of a MAC source address, the OUI) are purchased from the IEEE. The 12 hex digits of source address consist of the first/left 6 digits (which should match the vendor of the Ethernet network interface) and the last/right 6 digits which specify the interface serial number for that interface controller vendor (this gives 256 cubed addresses - or 16.78 million separate serial numbers). A 6-byte source address, which is set to the sender's.Mode), or the set of all recipient nodes ( broadcast Mode), a group of recipient nodes ( multicast A 6-byte destination address, which specifies either a single.Header MAC encapsulation of a packet of data When encoded using Manchester encoding, at 10 Mbps, the 62 alternating bits produce a 10 MHz square wave (one complete cycle each bit period). Strictly speaking the last byte which finished with the '11' is known as the "Start of Frame Delimiter". This consists of 62 alternating 1's and 0's followed by the pattern 11. A node starts transmission by sending an 8 byte (64 bit) preamble sequence. The purpose of the idle time before transmission starts is to allow a small time interval for the receiver electronics in each of the nodes to settle after completion of the previous frame. The entire frame is preceded by a small idle period (the minimum inter-frame gap, 9.6 or 10.4 microsecond (µS)) and a 8 byte preamble (including the start of frame delimiter). ![]() The MAC protocol encapsulates a SDU (payload data) by adding a 14 byte header (Protocol Control Information (PCI)) before the data and appending an integrity checksum, The checksum is a 4-byte (32-bit) Cyclic Redundancy Check (CRC) after the data. The Medium Access Control (MAC) protocol is used to provide Medium Access Control (MAC) Medium Access Control (MAC) ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |