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Introduction to Telecommunications Chapter 5

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Submitted By rahmusiq2012
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It-320 Inro to Telecom
Chapter 5 Review page 136
1., What purpose does the OSI stack perform?
The OSI model defines the way things should be done by the software and hardware on a network so that communications can take place between two computers or nodes. Although it doesn’t seem to perform anything.
3.What are the advantages of organizing the functions of the OSI module into layers? Just like anything else that is organized, if they are organized they will be easier to remember, to work with and to manage.
5.What function reside under the presentation layer?
The Presentation layer is the 6th.The reside under the presentation layer-JPEG, MPEG & MIDI. Layer helps for the display.
7.What function reside under the transport layer? Transport layer functions that reside are TCP, UDP-RTP & NCP. At the Transport layer, TCP takes the segment de-fined by layer 5 amd adds a header containing the port number, error checking schemes, flow contorl checks and sequence numbers.
9. What functions reside under the data link layer?
Data Link layer functions that reside are Ethernet, Frame Relay, ATM & HDLC. To my understanding is the connectivity protocols for the OS.
11. If you were asked to set up a routing protocol between five network routers, what layer or layers would you be working under? To set up a routing protocol between five network routers you would be working under layers and would use information from 4, 3, 2 &1. But mostly 3.
13. TCP and UDP are: D. Part of the transport layer responsible for end to end transmission of information.
14.List two Layer 4 protocols. Layer 4 Transport, protocols- TCP, UDP-RDP & NCP.
15. List two Layer 3 protocols. Layer 3 Network, protocols- IP, IPX & AppleTalk.
16.List two Layer 2 protocols. Layer 2 Data Link, protocols- Ethernet, Frame relay, ATM & HDLC.
17.List two Layer 1 protocols.

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