1. IT 101 J.J. Ekstrom, Ph.D. Networking, Information Management, Information Assurance and Security, Software Development, Systems Engineering IT Curriculum Development

2. 2 Education and Academia BS BYU 1974 MS BYU 1976 Ph.D. BYU 1992 BYU PT faculty 1979-1987, 2000 Associate Professor, EIT 2001 BYU Continuing Status 2007 IT Program Chair 2007 Programmer since 1966

3. 3 System Software Operating Systems Compilers Linkers/Loaders Object-oriented Design and Programming Systems

4. 4 Embedded Systems Automatic Storage and Retrieval Systems Military applications Microprocessor Control ROMs

5. 5 Application Areas Medical Banking Inventory and material management Information retrieval and indexing Network management LAN switch software design Email archiving and management

6. 6 Business 6-8 Startups (Depending on how you count) 4 Large Companies VP Director CTO Consulting Engineer MTS

7. 7 What you should remember: You will probably do a lot of different things during your life You will have to learn continuously or become obsolete The only physical constant in life is change Stay close to the Spirit, He gives you glimpses of what is over the horizon.

8. 8 Networking and Buzzwords OSI Model Internet Model Devices: Hosts, Hubs, Switches, Routers Network Design Network Deployment Network Management

9. 9 Alphabet Soup: OSI 7 layer model Internet/internet ISP IP TCP IETF IEEE ping traceroute SNMP SMTP IMAP POP FTP SCP SSH 802.11g 802.1Q 802.1D HTTP HTML URL RIP OSPF BGP4 JavaScript J2EE PHP Perl Python Ruby VB VPscript …

10. 10 There ain’t no magic! All of the acronyms have simple meanings You can figure out anything in IT if you are willing to dig a bit There is a world of information at your fingertips, don’t be afraid to Google for answers. A college education can only prepare you to learn The details will be obsolete within a few years of graduation I don’t use a language that was available when I got my Master’s Degree! (except English ;-)

11. 11 Details for those who care: Credits: Data Communications and Networking, 2 nd Edition. Behrouz A. Forouzan, McGraw- Hill, ©2001, 1998 Website associated with text. Some slides for digging:

12. 12 Figure 3-1 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 OSI Model

13. 13 Figure 3-2 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 OSI Layers

14. 14 Figure 3-3 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 An Exchange Using the OSI Model

15. 15 Figure 3-4 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Physical Layer

16. 16 Figure 3-5 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Data Link Layer

17. 17 Figure 3-6 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Data Link Layer Example

18. 18 Figure 3-7 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Network Layer

19. 19 Figure 3-8 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Network Layer Example

20. 20 Figure 3-8-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Network Layer Example

21. 21 Figure 3-9 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Transport Layer

22. 22 Figure 3-10 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Transport Layer Example

23. 23 Figure 3-10-continued WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Transport Layer Example

24. 24 Figure 3-11 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Session Layer

25. 25 Figure 3-12 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Presentation Layer

26. 26 Figure 3-13 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Application Layer

27. 27 Figure 3-14 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 Summary of Layer Functions

28. 28 Figure 24-1 An Internet According to TCP/IP

29. 29 Different Standards Bodies: OSI – Open Systems Interconnect IEEE 802 – Physical -> Data Link Divide DL into  Logical Link Control (LLC)  Media Access Control (MAC) 802.11 wireless IETF – Internet Protocols OMG – Middleware DMTF – Management Models … many others

30. 30 Figure 12-1 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 OSI Model and Project 802

31. 31 Figure 24-2 TCP/IP and the OSI Model

32. 32 Physical / Data Link Remember that IP rides on something else, PPP, PPPOE, Ethernet, Token ring, ATM… The following discussion takes the lower layers for granted. The only time you have to think about the physical and Data Link is when they don’t work. 80% of the time when a network doesn’t work it’s the cables!

33. 33 Troubleshooting: Ping fails Ping tests layers 1,2,3 Start at the physical layer and work up. Cables NIC – do you have a link light? MAC layer self configures, see if you can sniff (carry a laptop and a hub) Almost never the problem! If you have link, problem is probably setup of addressing.

34. 34 Figure 24-3 IP Datagram

35. 35 Figure 24-4 Internet Address

36. 36 Figure 24-5 Internet Classes

37. 37 Figure 24-6 IP Addresses in Decimal Notation

38. 38 Figure 24-7 Class Ranges of Internet Addresses

39. 39 Figure 24-8 Network and Host Addresses

40. 40 Figure 24-9 A Network with Two Levels of Hierarchy

41. 41 Figure 24-10 A Network with Three Levels of Hierarchy

42. 42 Figure 24-11 Addresses with and without Subnetting