File:OSI_vs_TCP_models.svg · Wikimedia Commons · See Wikimedia Commons
Described at

Network layers - IBM Documentation
One way to look at layering in a network is as "an isolation of concerns."
ibm.com →Note: This feedback goes to your product's documentation team and does not include a response. Issues that require a response should go through IBM support. Note: This feedback goes to your product's documentation team and does not include a response. Issues that require a response should go through IBM support. Note: This feedback goes to your product's documentation team and does not include a response. Issues that require a response should go through IBM support. There has been an error sending your feedback to the team. Your comment was saved locally, if not in an incognito browser, and will be available when attempting to submit feedback again. No networking information would be complete without discussing the fact that IP networks (and SNA networks, too) are implemented as layers. Each layer has certain capabilities (in the form of protocols) that it is required to uphold. For example, the IP layer does not include reliability of delivery, while the TCP layer does not concern itself with routing details. For example, when you write a check, you conform to various requirements of the check writing protocol: you must include the amount, the payee, the date and a signature on each check. When it comes to delivery of that check, you put it in an envelope and follow the postal mail protocol to ensure you have a destination address, zip code, return address and, of course, correct postage. The postal service doesn't care what protocol (the check writing protocol, in this case) is being encapsulated within the envelope. The content (payload) of a letter is not the concern of the mail protocol. While IBM values the use of inclusive language, terms that are outside of IBM's direct influence, for the sake of maintaining user understanding, are sometimes required. As other industry leaders join IBM in embracing the use of inclusive language, IBM will continue to update the documentation to reflect those changes.
Excerpt from a page describing this subject · 12,014 chars · not written by Vinony
Wikidata facts
- Part of
- OSI model
- Followed by
- transport layer
- Follows
- data-link layer
- Official website
- www.iso.org/ics/35.100.30.html
- Image
- Comparaison des modèles OSI et TCP IP.png
Show 7 more facts
- topic's main category
- Category:Network layer protocols
- standards body
- International Organization for Standardization
- Commons category
- Network layer
- Stack Exchange tag
- networkengineering.stackexchange.com/tags/layer3
- partially coincident with
- Internet layer
- described at URL
- aws.amazon.com/what-is/osi-model
- described by source
- Cloudflare
via Wikidata · CC0
Article · Español
El nivel de red o capa de red, según la normalización OSI, es un nivel o capa que proporciona conectividad y selección de ruta entre dos que pueden estar ubicados en redes geográficamente distintas. Es el tercer nivel del modelo OSI y su misión es conseguir que los datos lleguen desde el origen al destino aunque no tengan conexión directa. Ofrece servicios al nivel superior (nivel de transporte) y se apoya en el nivel de enlace, es decir, utiliza sus funciones. Para la consecución de su tarea, puede asignar direcciones de red únicas, interconectar subredes distintas, encaminar paquetes, utilizar un control de congestión y control de errores.
Abstract from DBpedia / Wikipedia · CC BY-SA