Na Bonda

LAB1.1

OSI LAYER | EXAMPLES |

Application Layer | Where communication begins, request for network, services to application |

Presentation Layer | Bits, Encoding, ASCII, Encryption, Formatting, compression |

Network Layer | Best Path Selection, Internetwork travel, Datagram, logical address |

Datalink Layer | LLC, MAC, Frames, NIC software functions, Synchronization |

Session Layer | Duplex, SQL |

Transport Layer | CRC, MTU, ACK, Data Segmentation, connection less services |

Physical Layer | End to end communication, CSMA/CD, HUBS, Cable, Voltage |

REVIEW QUESTIONS LAB 1.1

1. How does using the OSI model facilitate teaching and learning about networking?

* The Networking involves a many of the complex concepts. The model makes both the teaching and learning about the concept of networking easier by breaking it down into areas where common functions occur. These areas correspond to the seven layers of OSI Model.

2. How does using the OSI model facilitate the development of networking hardware and software?

* The model allows programmers and developers to concentrate on a particular level or layer. That layer is discrete and separate from the other layers.

3. How does using the OSI model provide compatibility and standardization between networking products?

* The model provides for standard interfaces between the layers. As long as the vendors adhere to these standard interfaces, their products should be compatible with other vendors’ products.

4. How does the user fit into the OSI model?

* The user is not in the model. The user is outside the model--above the Application layer. It is only when the user makes a remote request that the model comes into play.

5. What is the importance of the Network layer?

* The Network layer provides for some error checking, but its most important role is finding the best path to remote networks. It does this by filtering packets based on their logical...