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It-320 Unit 5 Homework

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Chapter 5 Review page 136
1., 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. Just like anything else that is organized, if they are organized they will be easier to remember, to work with and to manage.
5. The Presentation layer is the 6th.The reside under the presentation layer-JPEG, MPEG & MIDI. Layer helps for the display.
7. 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. Data Link layer functions that reside are Ethernet, Frame Relay, ATM & HDLC. To my understanding is the connectivity protocols for the OS.
11. 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 reside under layer 4 the Transport layer…… D. Part of the transport layer responsible for end to end transmission of information.
14. Layer 4 Transport, protocols- TCP, UDP-RDP & NCP.
15. Layer 3 Network, protocols- IP, IPX & AppleTalk.
16. Layer 2 Data Link, protocols- Ethernet, Frame relay, ATM & HDLC.
17. Layer 1 Physical, protocols- TDM, SONET, ADSL, 2B1Q, RS-232, RJ-45 & RJ-11.
18. The data link layer handles communication between systems on the same local network. The network layer handles communication between systems on differentlocal networks and allows those packets to be routed between the two. The data link layer would allow two machine on network a to talk to each other or two machines on network b to talk to each other. This communication takes place using the physical/MAC

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