Level 2 solutions are a fundamental part of the virtue of the network. It is a detailed explanation:
What the layer 2? *
We Computer 2 20) 2000. It is a yysical level and a transfer of transfer without errors, reliable and rapid data frames on a network.
The stack of the L2 Protocol continues of two sublayer: Mac (Miadia Access Control) and CSMA/CD (bearing multiple access sessions/circular recovery). The Sublayer Mac is responsible for feeling and reactive data frames on the data connection, while the CSMA/CD Sublayer provides corrupt errors and meters.
What layer 2 st. *
Level 2 Sozioni are designated to improve the network, scalability and performance providing further protection, reduction and flashing. Generally they involved a new level of the stack of the L2 protocol and the CTT of the OSI model.
There Serel type of layer solutions 2:
- Frame Relays : a dedicated circuit that Tharant and Refrems.
- ATM (Asychrono transfer mode)
: a simulation technology that uses high -speed multiple speed data.
- SONT/SDH (Synchronic digital hierarchy): a use protocol of digital signal processing for the transmission network for a long time.
Why do we make the solutions of the necklace 2 layer?
The networks are subject to greetings, errors and glances of packages due to various realities subjected to:
- Physical media limitations
- Network congestion
- Fuly or harmful device
Level 2 solutions are the problem of the problem:
- * Redendancy: the PATA transmission transmitted to provide multiplication, ensuring that remaining remaining remaining remaining or at the bottom remain.
2
- Improved Reliability : Reduce seminars and packages.
real world exams
Some level 2 common solutions:
Frame interconnections * (eg T1, E1) for high -speed network connections
DISTRIT SIMULTURAL S (for example, Cisco Catalyst champions) to improve scalability and execution in data centers
Network runer with simultaneous capacity (for example Juniper Networks SRX series) to demonstrate the protection and optimization of level 2.
In summary, Layyer 2 solutions designed for the reliability of reliability, scalability and performance by providing dependence on addiction, reduction and faculty. This solution is the reason why the challenges of the networks of wit, errors and associated packages, the symptoms remain of suborse in adverse conditions.