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CCNA Discovery Curriculum Review

CCNA Discovery Curriculum Review. Networking for Home and Small Businesses Chapter 6: Network Services. Disclaimer. This review is not a comprehensive learning model of the curriculum! It is intended for chapter pre-exam prep, or post exam review.

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CCNA Discovery Curriculum Review

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  1. CCNA Discovery Curriculum Review Networking for Home and Small Businesses Chapter 6: Network Services RE Meyers, Ms.Ed., CCAI

  2. Disclaimer • This review is not a comprehensive learning model of the curriculum! • It is intended for chapter pre-exam prep, or post exam review. • Using this presentation as your sole source of teaching or learning will not provide all the information you need to be successful in the Cisco Networking Academy. • All materials, images, text, and content unless noted remains the licensed property of the Cisco Networking Academy. • Please report all errors as soon as possible to: • remeyers@mail.wvu.edu RE Meyers, Ms.Ed., CCAI

  3. Objectives • Compare and contrast clients and servers and their interaction over the network. • Describe the type of interactions of Internet applications. • Describe the purpose of a layered model • Illustrate the interaction of various protocols. RE Meyers, Ms.Ed., CCAI

  4. ICG: Section 6.1 RE Meyers, Ms.Ed., CCAI

  5. Clients/Servers and Their Interactions • A server is a host running software that provides information or services to other hosts on the network. RE Meyers, Ms.Ed., CCAI

  6. Clients/Servers and Their Interactions 6.1.1 • DHCP is likely the first used by a host re-booting. RE Meyers, Ms.Ed., CCAI

  7. Clients/Servers and Their Interactions 6.1.3 • Clients and servers use specific protocols to communicate RE Meyers, Ms.Ed., CCAI

  8. Clients/Servers and Their Interactions 6.1.3 • TCP is used when an application requires acknowledgment that a message is delivered • FTP and HTTP RE Meyers, Ms.Ed., CCAI

  9. Clients/Servers and Their Interactions 6.1.3 • UDP is a 'best effort' delivery and does not require acknowledgment of receipt • Used with streaming audio, video, gaming, and VoIP RE Meyers, Ms.Ed., CCAI

  10. Port Numbers in Client-Server Conversations • TCP and UDP use port numbers to identify protocols and services RE Meyers, Ms.Ed., CCAI

  11. ICG: Section 6.2 RE Meyers, Ms.Ed., CCAI

  12. Applications Protocols and Services 6.2.1 • Domain Name System (DNS) translates domain names into IP addresses RE Meyers, Ms.Ed., CCAI

  13. Applications Protocols and Services 6.2.1 RE Meyers, Ms.Ed., CCAI

  14. Applications Protocols and Services 6.2.3 • FTP Protocol • Requests via port 21 • Replies via port 20 RE Meyers, Ms.Ed., CCAI

  15. Applications Protocols and Services 6.2.4 RE Meyers, Ms.Ed., CCAI

  16. Applications Protocols and Services 6.2.5 • Instant Messaging for real time communication RE Meyers, Ms.Ed., CCAI

  17. Applications Protocols and Services 6.2.7 • Client requests can be identified by a server by the specific destination port. RE Meyers, Ms.Ed., CCAI

  18. ICG: Section 6.3 RE Meyers, Ms.Ed., CCAI

  19. Layered Model and Protocols 6.31 • TCP protocol stack formats, addresses, and transmits information across a network RE Meyers, Ms.Ed., CCAI

  20. Layered Model and Protocols 6.3.1 • When sending messages on a network, the protocol stack on a host operates from top to bottom RE Meyers, Ms.Ed., CCAI

  21. ip source and destination Layered Model and Protocols 6.3.1 RE Meyers, Ms.Ed., CCAI

  22. Layered Model and Protocols 6.3.2 RE Meyers, Ms.Ed., CCAI

  23. Layered Model and Protocols 6.3.2 http://www.comptechdoc.org/independent/networking/guide/dataencapsulation.gif RE Meyers, Ms.Ed., CCAI

  24. Layered Model and Protocols 6.3.3 • Open Systems Interconnect Model RE Meyers, Ms.Ed., CCAI

  25. Layered Model and Protocols 6.3.3 RE Meyers, Ms.Ed., CCAI

  26. Layer 1 2.3.4 RE Meyers, Ms.Ed., CCAI

  27. Summary • Clients and servers use protocols and standards for exchanging information. • Client-server services are identified through the use of port numbers. • A protocol stack organizes the protocols in layers, with each layer providing and receiving services from the layers below and above it. • When sending messages, protocols interact from the top layer to the bottom of the stack. • When receiving messages, protocols interact from the bottom layer to the top of the stack. RE Meyers, Ms.Ed., CCAI

  28. RE Meyers, Ms.Ed., CCAI

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