Network communication between computer systems is facilitated by seven levels described by the Open Systems Interconnection (OSI) model. Cisco Systems offers the well-known CCNA (Cisco Certified Network Associate) certification for computer network workers. Understanding a wide range of networking principles, including network security, IP addressing, OSI models, and others, is beneficial. CCNA Course in Bangalore offers a prime opportunity to delve into crucial networking concepts, providing the foundation for a successful career. In this Blog, we see the OSI Model in CCNA.

Seven Layers of OSI

Physical Layer

The physical layer handles physical connections between network nodes, whether wired or wireless. It controls the bit rate and transmits raw data, just a string of 0s and 1s. It also specifies the connector, the wired or wireless connection that links the devices.

Data Link Layer

The data link layer on a network creates and breaks connections between two physically connected nodes. Packets are divided into frames and sent from the source to the destination. This layer consists of two components: Media Access Control (MAC), which connects devices using MAC addresses and defines rights to send and receive data, and Logical Link Control (LLC), which recognizes network protocols, checks for errors, and synchronizes frames.

Network Layer

The two primary uses for the network layer. One involves segmenting a network into packets and putting the packets back together at the other end. The other involves finding the most efficient route through a physical network to route packets. Packets are routed to a destination node by the network layer using network addresses, usually Internet Protocol addresses.

Transport Layer

The transport layer separates the data sent in the session layer into segments on the transmitting end. It is responsible for assembling the segments at the receiving end and converting them into data that the session layer may use. Through a CCNA Course in Marathahalli, students learn about the Transport Layer, which ensures reliable end-to-end communication by managing data segmentation, flow control, and error correction in network transmissions.

Session Layer

The session layer establishes device-to-device communication channels or sessions, ensuring their operational and open status while data is being sent and shutting them down after communication.

Presentation Layer

Data preparation for the application layer occurs at the presentation layer. Presentation Layer describes how two devices should encode, encrypt, and compress data to be correctly received on the other end.

Level of Application

Email clients and web browsers are end-user software that employs the application layer. It offers protocols that enable applications to communicate with one another and give users relevant data. Applications layer protocols include:

  • The Post Office Protocol (POP)
  • Simple Mail Transfer Protocol (SMTP)
  • File Transfer Protocol (FTP)
  • Hypertext Transfer Protocol (HTTP)
  • Domain Name System (DNS)

In conclusion, mastering the OSI model is essential for CCNA certification. Coaching Centre in Bangalore offers structured courses and expert guidance to help aspiring networking professionals navigate this intricate subject and excel in their certification journey. With their support, individuals can gain the knowledge and skills needed to succeed in the dynamic field of IT networking.