Industrial Networking Basics Flashcards
What is a WAN?
A wide area network is a communications system that covers a large geographic area.
WANs are computer networking technologies used to transmit data over long distances, and between diferent LANs, MANs and other localized computer networking architectures
What is a LAN?
A local area network is a computer network that interconnects computers in a limited area such as a home, school, computer laboratory, or office building using network media.
The defining characterisitcs of LANs, in contrast to WANs, include their usually higher data-transfer rates, smaller goegraphic area, and lack of a need for leased telecomunications lines.
Describe Layer 3 of the ISO/OSI Reference Model
Is responsible for interconect networks, dealing with routing paquets through networks.
Protocols: IPv4, IPv6, ICMP…
Routing protocols: RIP, OSPF, BGP…
Describe Layer 1 of the ISO/OSI Reference Model
Physical layer protocols are concerned with the physics of getting a message from one device to another:
- Electrical characterisitcs
- Mechanical characterisitcs (i.e. connector)
- Standards for cables, connectors, wiring topologies and/or signaling techniques
Describe Layer 2 of the ISO/OSI Reference Model
Provides the rules for framing, converting electrical signalas to data, error checking, physical addressing and media access control (which station can talk at any given time on the network)
What are the funcitions of the Transport Layer?
Interconnect end devices each other across complex networks.
* Flow control
* Multiplexing (sockets, ports)
* Error checking and recovery
What is a session and what does the Session Layer do?
Session is a persistent logical linking of two software applications processes. The session layer controls the dialogues (connections) between computers by providing the mechanism for opening closing and managing a session between end-user application processes.
Describe Layer 7 of the ISO/OSI Reference Model
Applications Layer protocls sepecify the rules to achieve specific tasks over a network. They interacts with software applications that implement a communicating component
Gateways connect two completely different network systems. Which layer do they operate in?
Layer 7: Application Layer
True of False
The data link layer is concerned with local delivery of frames between devies on de same LAN.
True
Mesh, bus, star and ring are types of…
Network Topologies
Which layer controls the connections (linking) between computers from same or diferents LANs?
Session Layer
