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Bellevue University CIS 341A

Bellevue University CIS 341A. Mid-Term Review. The exam. Monday, June 30, at 6 PM 35 Question multiple choice, True/False, and fill in the blanks You have 70 minutes to complete the exam The exam will be closed book, closed notes, closed communication between students. Scoring.

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Bellevue University CIS 341A

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  1. Bellevue UniversityCIS 341A Mid-Term Review

  2. The exam • Monday, June 30, at 6 PM • 35 Question multiple choice, True/False, and fill in the blanks • You have 70 minutes to complete the exam • The exam will be closed book, closed notes, closed communication between students

  3. Scoring • 2.8 points for each correct answer • 2 points for putting your name on your paper and turning it in • If the entire class gets a question wrong, it will be thrown out and 2.8 points will be credited to each student

  4. What to study • The review slides • The Reading Assignments • The Lab Assignments • The Quizzes

  5. What the exam will cover • Internetworking • Internet Protocols • IP Subnetting and Variable Length Subnet Masks (VLSMs) • Introduction to the Cisco IOS • IP Routing

  6. Internetworking Basics A network consists of two or more hosts connected by a common communications medium for the purpose of sharing information. An internetwork consists of two or more networks connected by routers.

  7. Internetworking Basics In Ethernet twisted pair networks, switches are typically used to connect hosts together. In internetworks routers are used to connect networks together.

  8. Switches and Routers • Layer 2 switches break up collision domains • Layer 3 switches and routers break up broadcast domains

  9. The OSI Model • 7 layer abstract network model • Simplifies design and interaction of protocols • Provides a framework for the study of protocols

  10. The OSI Reference Model OSI Reference Model’s Seven Layers • Application Layer • Presentation Layer • Session Layer • Transport Layer • Network Layer • Data Link Layer • Physical Layer

  11. The OSI Reference Model OSI Reference Model’s Seven Layers and Functions • Application Layer: File, print, message, database and application services. • Presentation Layer: Data encryption, compression and translation services. • Session Layer: Dialog control. • Transport Layer: End-to-end connection. • Network Layer: Routing. • Data Link Layer: Framing. • Physical Layer: • Physical topology.

  12. The OSI Reference Model The Transport Layer • The address used in the transport layer is the port number • There are two protocols that operate at this layer: Transmission Control Protocol and User Datagram Protocol • Each protocol has its own set of 65536 ports

  13. The OSI Reference Model The Network Layer • The address used in the Network layer is the IP Address • A protocol number is also used to determine what protocol to deliver the packet to at the destination.

  14. The OSI Reference Model The Data Link Layer • The address used in the data link layer is the physical address (also known as hardware or MAC address.

  15. The OSI Reference Model The Physical Layer • Sends and receives bits; 1’s & 0’s • Specify electrical, mechanical, procedural, and functional requirements • DTE/DCE interfaces identified • Hubs (Multi-port repeaters)

  16. Ethernet Networking • A connection media access method that allows all hosts on a network to share the same bandwidth (Uses Data Link & Physical Layer specifications) • CSMA/CD • Half Duplex • Full Duplex

  17. Ethernet Networking Ethernet at the Data Link Layer • Ethernet addressing = Hardware or MAC • Framing • Types of Ethernet frames: • Ethernet II • IEEE 802.3 • IEEE 802.2 • SNAP

  18. Ethernet Networking Ethernet Frames

  19. Ethernet Cabling • Unshielded twisted pair • Coax • Fiber

  20. Connecting devices together • Use these guidelines when cabling between ports: • Use straight through cables when connecting unlike devices together • Use crossover cables when connecting like devices together

  21. Wireless Networking

  22. Wireless Networking Wireless Network Types • Narrowband Wireless LANs • Personal Communication Services (PCS) • Narrowband PCS • Broadband PCS • Satellite • Infrared Wireless LANs • Spread Spectrum Wireless LANs

  23. Data Encapsulation

  24. TCP/IP and the DoD Model

  25. TCP/IP and the DoD Model The TCP/IP Protocol Suite

  26. TCP/IP and the DoD Model Host-to-Host Layer Protocols Transmission Control Protocol (TCP)

  27. TCP/IP and the DoD Model Host-to-Host Layer Protocols User Datagram Protocol (UDP)

  28. TCP/IP and the DoD Model Key Concepts of Host-to-Host Protocols

  29. TCP/IP and the DoD Model Port Numbers • < 1024: “Well-known port numbers” • Defined in RFC 3232; linked to specific applications or protocols • 1024: Dynamically assigned • Used by upper layers to communicate between hosts

  30. TCP/IP and the DoD Model Internet Layer Protocols • Internet Protocol (IP) • Internet Control Message Protocol (ICMP) • Address Resolution Protocol (ARP) • Reverse Address Resolution Protocol (RARP)

  31. TCP/IP and the DoD Model Internet Layer Protocols

  32. TCP/IP and the DoD Model Internet Layer Protocols

  33. TCP/IP and the DoD Model Internet Layer Protocols

  34. TCP/IP and the DoD Model Local ARP Broadcast

  35. TCP/IP and the DoD Model RARP Broadcast

  36. Binary to Decimal and Hexadecimal Conversion

  37. Binary to Decimal and Hexadecimal Conversion

  38. Binary to Decimal and Hexadecimal Conversion

  39. Binary to Decimal and Hexadecimal Conversion

  40. IP Addressing The Hierarchical IP Addressing Scheme • Dotted-decimal, as in 172.163.30.56 • Binary, as in 10101100.00010000.00011110.00111000 • Hexadecimal, as in AC.10.1E.38

  41. IP Addressing Summary of the Three Classes of Networks

  42. IP Addressing Reserved IP Addresses

  43. Classful Routing • The class of an IP address is determined by its most significant bits. 0 Class A 10 Class B 110 Class C 1110 Class D 1111 Class E

  44. IP Addresses • Class A – 0.0.0.0 through 127.255.255.255 • Class B – 128.0.0.0 through 191.255.255.255 • Class C – 192.0.0.0 through 123.255.255.255 • Class D – 124.0.0.0 through 239.255.255.255 • Class E – 240.0.0.0 through 255.255.255.255

  45. Classful Routing • Only Class A, B, and C addresses are routable through the Internet.

  46. IP Addressing Class A Addresses • Structure • Network.node.node.node • Class A Valid Host IDs • 10.0.0.0 All host bits off • 10.255.255.255 All host bits on • Valid hosts = 10.0.0.1 - 10.255.255.254 • 0’s & 255s are valid hosts but hosts bits cannot all be off or on at the same time! • 224-2 = 222

  47. IP Addressing Class B Addresses • Structure • Network.Network.node.node • Class B Valid Host IDs • 172.16.0.0 All host bits off • 172.16.255.255 All host bits on • Valid hosts = 172.16.0.1 - 172.16.255.254 • 0’s & 255s are valid hosts but hosts bits cannot all be off or on at the same time! • 216-2 = 214

  48. IP Addressing Class C Addresses • Structure • Network.Network.Network.node • Class C Valid Host IDs • 192.168.100.0 All host bits off • 192.168.100.255 All host bits on • Valid hosts = 192.168.100.1 - 192.168.100.254 • 0’s & 255s are valid hosts but hosts bits cannot all be off or on at the same time! • 28-2 = 26

  49. IP Addressing Private IP Addresses

  50. Broadcast Addresses

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