Inter-Networking Overview
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The document discusses network topologies, models, and protocols. It explains line configurations and different network topologies like bus, star, ring, tree and mesh. It also discusses local, metropolitan and wide area networks. The document describes the OSI model layers and their functions. It explains Cisco's hierarchical network model and the roles of the core, distribution and access layers. Network transmission modes and protocols like Ethernet are also summarized.
Inter-Networking Overview
- 2. Explain line configuration Explain different types of topologies Explain the types of networks Discuss the modes of transmission Discuss the hierarchical network model Discuss the OSI Layers Chapter 1 2
- 3. A dedicated link exists between the two devices Chapter 1 3
- 4. More than two devices share the same link Chapter 1 4
- 5. Represents the physical layout of devices on a network It is the arrangement of the devices on the network and the way they communicate with each other Bus Physical Topology Mesh Star Tree Ring Chapter 1 5
- 6. This is used in a small area, an office or organization The computers can be connected to each other and other devices, printer or a modem The rate at which the data is transmitted is very fast Chapter 1 6
- 7. This is used in a large geographical area, town or city Enables high speed connections using fiber optic Chapter 1 7
- 8. This is used in a larger area than MAN, countries or cities Enables high speed connections using public networks, telephone lines, satellites, or leased lines Chapter 1 8
- 9. Only one device can transmit the data, whereas the other can only receive the data Chapter 1 9
- 10. Both devices can transmit and receive the data, but not simultaneously Chapter 1 10
- 11. Both the devices can send and receive the data simultaneously Chapter 1 11
- 12. Chapter 1 12
- 13. The topmost layer of the OSI model Link between the user and the presentation layer Chapter 1 13
- 14. Functions include › Authentication › File access, transfer and management › Directory Services Chapter 1 14
- 15. Acts as a link between application and the session layer Defines the forms of text, graphics, video or audio information that is to be sent to the user Chapter 1 15
- 16. Responsible to validate and establish a connection between the users Each session is divided into sub sessions Functions include › Session Management › Synchronization › Dialog Control › Closing the session Chapter 1 16
- 17. Responsible for source-to-destination delivery of the entire message divides each message into segments and assigns a sequence number to each segment Functions include › Service point addressing › End-to-end message delivery › Segmentation and reassembly › Connection control Chapter 1 17
- 18. Three-Way handshake helps to establish the connection between the two devices Chapter 1 18
- 19. This concept of deciding the window size without sending an acknowledgement is termed as Windowing Chapter 1 19
- 20. Chapter 1 20
- 21. Responsible for routing and logical addressing Assigns IP addresses and routes the packets to the destination Functions include › Source-to-destination delivery › Logical addressing › Routing › Address transformation › Multiplexing Chapter 1 21
- 22. Second layer of the OSI model Functions include › Identifying the encapsulated data › Framing › Arbitration › Physical addressing › Error detection Chapter 1 22
- 23. Responsible for transmitting a bit over the physical medium Converts the data from the data link layer in a format that the communication medium can carry Functions include: › Line configuration › Data transmission › Topology › Signals Chapter 1 23
- 24. Half Duplex Full Duplex One wire is used to connect the Two wires are used to connect the networks and transmit the data networks and transmit the data Chances of collision if client and There are no chances of collision server transmit data simultaneously It uses Carrier Sense Multiple CSMA/CD not required hence the Access with Collision Detection data transmission rate is 100 (CSMA/CD) protocol percent Chapter 1 24
- 25. Frames are used to transfer the packets They perform the data security check and ensure that the data is not corrupted Chapter 1 25
- 26. The benefits of Cisco hierarchical model include › High performance › Efficient management and troubleshooting › Policy creation › Scalability › Behavior prediction Chapter 1 26
- 27. Responsible for fast and reliable transportation of data across a network Devices include › Cisco Switches in the 7000, 7200, 7500 and 12000 series for connecting to the WAN devices › Catalyst Switches in the 6000, 5000 and 4000 series for connecting to the LAN devices Chapter 1 27
- 28. Responsible for routing and managing network traffic Functions include › Packet filtering › Access layer aggregation point › Control broadcast and multicast › Application gateways Chapter 1 28
- 29. Layer ensures that the packets are delivered to the destination computers Functions include › Address filtering › Separate collisions domain › Share bandwidth › Handle switch bandwidth Chapter 1 29
- 30. Chapter 1 30
- 31. Chapter 1 31
- 32. Chapter 1 32
- 33. Unshielded Twisted Pair (UTP) Shielded Twisted Pair (STP) Chapter 1 33
- 34. Line configuration is the manner in which the devices are attached to the communication links Topology is the way in which the devices are connected together in the network Two types of line configuration are: › Point-to-point › Multipoint Five basic topologies include › Bus › Star Chapter 1 34
- 35. › Ring › Tree › Mesh The types of network are › Local Area Network › Metropolitan Area Network › Wide Area Network Modes of transmission › Simplex › Half Duplex › Full Duplex Chapter 1 35
- 36. The hierarchical network model designed by Cisco provides a reliable, scalable and cost effective way to transfer information The three layers of the network model are: › Core › Distributional › Access Core layer is responsible for fast and reliable transportation of data on the network Chapter 1 36
- 37. Distribution layer is responsible for routing and it manipulates the packets by queuing them Access layer ensures that the packets are delivered to the destination computers The Open Systems Interconnection (OSI) is the layered model for the network systems, which enables computers in the network to communicate with each other Application layer provides an interface for the user to interact with the application Chapter 1 37
- 38. The seven layers of the OSI model include: › Application › Presentation › Session › Transport › Network › Data Link › Physical Chapter 1 38
- 39. Presentation layer is responsible for the delivery of information Session layer controls the communication between the applications on the hosts Transport layer is responsible for source-to- destination delivery of the entire message Ethernet Frames are used by the Data Link layer to transfer the packets of data from the Network layer Physical layer is responsible to transmit a bit over the physical medium Chapter 1 39