Ethernet Flashcards
What is Ethernet?
Ethernet is a family of computer networking technologies commonly used in local area networks.
Ethernet provides communication services up to the Data Link layer.
Most types of Ethernet systems involve twisted pair cabling in order to connect devices together.
What is an Ethernet frame?
An Ethernet frame is a structured transmission from one Ethernet device to another, operating at the physical layer.
It is comprised of 6 fields which are assembled in order to transmit data for higher level protocols across an Ethernet network.
The six fields are, in order: preamble, destination address, source address, type/length, data payload, and FCS.
What is an Ethernet switch?
An Ethernet switch is a networking device that bridges Ethernet segments together and relays Ethernet frames among these connected segments, thereby creating and expanding an Ethernet network.
A switch operates at the Data Link layer and copies Ethernet frames from one switch port to another based on the Media Access Control (MAC) addresses in the Ethernet frames.
What is a network segment?
A network segment is the portion of a computer network that exists between any two transmission devices such as a repeater, hub, bridge, switch or router.
What is an Ethernet hub?
An Ethernet hub is a networking device that connects multiple Ethernet devices together and allows them to act as a single network segment and collision domain.
A hub operates at the Physical Layer.
What is a collision domain?
A collision domain is a section of a network connected by a shared medium or through repeaters where data frames/packets can collide with one another while being sent.
What is a broadcast domain?
A broadcast domain is a logical division of a computer network, in which all nodes can transmit to each other by broadcast messaging at the Data Link Layer.
A broadcast domain can be within the same LAN segment or it can be bridged to other LAN segments.
