In Networking terminology, what is L1, L2,L3, L4...Roles.?

Question

They often say they are Sys Admin with L2 Position. What exactly this L's Mean. Which is the higest and which is lowest Roles.What actually is this role???????

Please explain in detail. Thank you for kind suggestions and advices.

Answer 1

Level of support indicates a specific extent of technical assistance in the total range of assistance that is provided by an information technology product (such as a software product) to its customers. Each company decides how to organize its total technical support into levels and what to name them. Some companies name their levels of support basic and advanced. Others call them level 1, level 2, and level 3 or level A, level B, and level C.



Typically, when a software user calls for technical assistance, a level 1 technician tries to answer all questions, which might include help with simple problems or general "how-to" questions. If the question is more complex, the user is passed on to the level 2 technician. Level 2 questions may, for example, deal with advanced features and possible product bugs or failures. If the level 2 technician cannot help the caller, a level 3 technician may be consulted either by the customer or by the level 2 technician. Some research and investigation at this level might be required, which can take time. Some companies offer certain levels of support only on a fee basi

Answer 2

L2 L3 Networking

Answer 3

When you talk about IP networking usually is used OSI Layer model which is divided in 7 OSI Layers:



The specific description for each layer is as follows:



Layer 7:Application Layer

Defines interface to user processes for communication and data transfer in network. Provides standardized services such as virtual terminal, file and job transfer and operations



Layer 6:Presentation Layer

Masks the differences of data formats between dissimilar systems.

Specifies architecture-independent data transfer format. Encodes and decodes data; Encrypts and decrypts data; Compresses and decompresses data



Layer 5:Session Layer

Manages user sessions and dialogues. Controls establishment and termination of logic links between users. Reports upper layer errors



Layer 4:Transport Layer

Manages end-to-end message delivery in network. Provides reliable and sequential packet delivery through error recovery and flow control mechanisms.Provides connectionless oriented packet delivery.



Layer 3:Network Layer

Determines how data are transferred between network devices. Routes packets according to unique network device addresses. Provides flow and congestion control to prevent network resource depletion.



Layer 2:Data Link Layer

Defines procedures for operating the communication links.Frames packets. Detects and corrects packets transmit errors



Layer 1:Physical Layer

Defines physical mean of sending data over network devices. Interfaces between network medium and devices.

Defines optical, electrical and mechanical characteristics.

Answer 4

Great list and great laughs! Enjoy the star!