TAILIEUCHUNG - White Papers_Chapin_CCENTReview_d2

CCENT has been created to address the need for providing networking professionals with a solid practical understanding of modern TCP/IP networks built with Cisco hardware, and will certify practical skills required for entry-level network support positions. This certification will serve as the base of Cisco's certification pyramid. It is similar in nature to CompTIA's Network+ Certification and represents a tangible first step in earning your CCNA certification. This document is intended to help students gain an understanding of the basic network fundamentals prior to attending our ICND1 – Interconnecting Cisco Network Devices 1 course (and exam 640-822 ICND1) or our CCNA Boot Camp. This review is. | Global Knowledge Course Review Series CCENT Review 1-800-COURSES CCENT Review Rick Chapin Global Knowledge Instructor Introduction CCENT has been created to address the need for providing networking professionals with a solid practical understanding of modern TCP IP networks built with Cisco hardware and will certify practical skills required for entry-level network support positions. This certification will serve as the base of Cisco s certification pyramid. It is similar in nature to CompTIA s Network Certification and represents a tangible first step in earning your CCNA certification. This document is intended to help students gain an understanding of the basic network fundamentals prior to attending our ICND1 - Interconnecting Cisco Network Devices 1 course and exam 640-822 ICND1 or our CCNA Boot Camp. This review is intended only as a preview and additional training knowledge may be needed in order to attend the ICND1 course or the CCNA Boot Camp. Please note This document is not intended to replace hands-on course work. Copyright 2007 Global Knowledge Training LLC. All rights reserved. 2 OSI Reference Points OSI Layer Upper or Data Flow Layer Network Reference Network Device 7 - Application Upper 6 - Presentation Upper 5 - Session Upper PDU or Message 4 - Transport Data Flow Segment 3 - Network Data Flow Packet or Datagram MultiLayer Switch or Router 2 - Data Link Data Flow Frame Switch or Bridge 1 - Physical Data Flow Bits and Signaling Hub OSI Reference Points Remembered Please Do Not Throw Sausage Pizza Away. OSI Layers OSI Layer Purpose Examples Application Provides services to network applications. This layer is responsible for determining resource availability identifying communications peers and synchronizing communications between the applications. Simple Mail Transport Protocol SMTP Telnet File Transfer Protocol FTP Trivial File Transfer Protocol TFTP HyperText transfer Protocol HTTP Presentation Provides the coding and .

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