LAN Flashcards
What is the primary function of a Local Area Network (LAN)?
Connects all user points in a local well-defined geographical area with equal priority
What is the typical geographical range of a LAN?
About 1 km in diameter
What are the common transmission rates for LANs?
1-10 Mb/s, 100 Mb/s, and 1000 Mb/s
What does CSMA/CD stand for?
Carrier Sensing Multiple Access with Collision Detection.
is a medium access control (MAC) method used most notably in early Ethernet technology for local area networking. It uses carrier-sensing to defer transmissions until no other stations are transmitting.
What is the purpose of CSMA/CD?
To share network resources in a simple and robust manner
Where was CSMA/CD originally used?
In the first Ethernet scheme
What is the role of the Logical Link Control (LLC) in a LAN?
Logical Link Control (LLC) sublayer provides the logic for the data link. Thus, it controls the synchronization, flow control, and error checking functions of the data link layer.
It is independent of the transmission medium and method of access.
What is Contention Protocol
Media access method that is used to share a broadcast medium in contention. Any computer in the network network can transmit data any time (first come first serve) this breaks down when multiple send at the same time resulting in a collision.
True or False: LANs allow each station to communicate with any other station.
True
What is Go-Back-N ARQ protocol?
Continuously send until you receive a packet that had an error then you go back to it and start from there again. This feedback is piggy-backed onto a message already going back. Similar flow of data in each direction.
The Go-Back-N protocol is a continuous-ARQ protocol where the sender can transmit multiple frames without waiting for individual acknowledgments, up to a specified window size. If an error occurs, the sender “goes back” and retransmits all frames from the lost frame onward, even if only one frame was lost.
More efficient than S+W for small BER.
Needs full-duplex.
What is the OSI model?
The OSI model is a conceptual framework used to understand network interactions in seven layers.
What are the layers of the OSI model?
Physical, Data Link, Network, Transport, Session, Presentation, and Application.
What does LAN stand for?
LAN stands for Local Area Network.
What is IEEE802?
IEEE802 is a set of standards for local area networks (LANs) and metropolitan area networks (MANs).
What is CSMA/CD?
CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection, a network protocol for Ethernet.
