Unit 5 Assignment 1

Topics: Ethernet, Media Access Control, MAC address Pages: 6 (1270 words) Published: January 5, 2015
Baldeo Persaud
NT 1210
Unit 5 Assignment 1
Ethernet LANs: A collection of devices, including user devices, LAN switches, routers, old hubs, and cables, all of which use IEEE Ethernet standards at the physical and data link layers, so that the devices can send Ethernet frames to each other. 802.3: The name of the original IEEE Ethernet standard, as well as the overall base name of all IEEE Ethernet LAN working committees. Fast Ethernet: The informal name for one particular Ethernet standard, originally defined formally as 802.3u, which was the first Ethernet standard to surpass the original 10-Mbps speed to run at 100 Mbps. Gigabit Ethernet: The informal name for one particular Ethernet standard, defined formally in 802.3z (for fiber) and 802.3ab (for UTP), with a speed of 1 Gbps. Autonegotiation: A process defined by the IEEE so that nodes on the same Ethernet link can exchange messages for the purpose of choosing the best speed and duplex option that both nodes support. Ethernet frame: The bytes of data that flow in an

Ethernet LAN, which begins with the Ethernet header, followed by data (which actually holds headers from other layers as well as end-user data) and ends with the Ethernet trailer. Ethernet LANs deliver Ethernet frames from one Ethernet device to another. MAC address: A data link layer address, 48 bits in length, usually written as 12 hexadecimal digits and used to represent different devices connected to LANs. MAC address table: On a LAN switch, a table of MAC addresses and local switch ports that the switch uses when making its decision of where to forward Ethernet frames that arrive at the switch. Wired LAN: A local-area network (LAN) that uses cables/wires; the word wired refers to the wires inside UTP cables. Wireless LAN: A group of wireless clients, plus one or more wireless access points, with the access points all using a common SSID (wireless LAN name). Star topology: A network topology in which links extend outward from a central node, somewhat like rays of light going out from a star/sun. Ethernet frame: The bytes of data that flow in an Ethernet LAN, which begins with the Ethernet header, followed by data (which actually holds headers from other layers as well as end-user data) and ends with the Ethernet trailer. Ethernet LANs deliver Ethernet frames from one Ethernet device to another. 10BASE-T: The common name for one of several standards that are part of the IEEE Ethernet 802.3i standard. This standard uses two twisted pairs in a UTP cable, with a bit rate of 10 Mbps. 100BASE-T: A term that refers to all Fast Ethernet standards, including 100BASE-Tx, which refers to the one Fast Ethernet standard that uses two pairs in a UTP cable. 1000BASE-T: A particular Ethernet standard shortcut name, also known by the formal standard 802.3ab, which defines 1000-Mbps (1-Gbps) operation, star topology, using four-pair UTP cabling. 10GBASE-T: A particular Ethernet standard shortcut name, also known by the formal standard 802.3an, that defines 10-Gbps operation, star topology, using four-pair UTP cabling. Metro Ethernet: A type of multiaccess WAN service that uses Ethernet as the physical access link and usually uses an Ethernet switch as the customer site device, with the customer sending Ethernet frames from one customer site to the other.

Token Ring: An old LAN technology, popularized by IBM and standardized by IEEE as standard 802.5, that competed with Ethernet LANs in the 1980s and 1990s. LAN Edge: A reference to the part of the campus LAN with the end-user devices and the switches to which they connect, through an Ethernet switch or a wireless LAN access point, that contains the largest number of physical links. Wireless-only LAN edge: A campus LAN design term referring to campus LANs with only wireless connections between end-user devices and APs, and no wired Ethernet LAN connections at the edge. Wired/wireless LAN edge: A campus LAN design term referring to campus LANs, with the edge of...
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