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ECE 4110 – Internetwork Programming. Tuna Tugcu GTREP [email protected] Outline. General information about the course: Objective Textbooks and web site Labs and C programming language Rules Review of computer networks: Definitions and architecture OSI model

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Presentation Transcript
outline
Outline
  • General information about the course:
    • Objective
    • Textbooks and web site
    • Labs and C programming language
    • Rules
  • Review of computer networks:
    • Definitions and architecture
    • OSI model
    • Internetwork connections

ECE 4110 – Internetwork Programming

objective
Objective
  • Understand how the Internet works
    • IP addressing
    • TCP/IP
      • Flow control, congestion avoidance, etc.
    • Routing
    • Linux kernel
  • Hands on networking exercises
    • Sockets programming
    • TCP/IP Protocol implementation

ECE 4110 – Internetwork Programming

textbooks and web site
Textbooks and Web Site
  • We will use three textbooks:
    • TCP/IP Illustrated: Volume I (Stevens)
    • Unix Network Programming (Stevens)
    • TCP/IP Protocol Suite (Forouzan)
  • Lots of additional resources mentioned on the web site.
  • http://www.gtrep.gatech.edu/academics/ece/summer03/4110.html
    • Course material and announcements

ECE 4110 – Internetwork Programming

slide5
Labs
  • We will have 8-10 labs.
    • Digilab I in Chatham Center
    • Tech 2118 in GaSoU
    • Lab hours  TBA
  • Each day late  -10 points
    • Maximum 7 days late; o/w you will get zero from that lab.
  • We will use Linux OS.
    • Installing Linux on your PC is encouraged.
  • Topics:
    • TCP-UDP traffic generators, network sniffing, IP forwarding, routing and queuing, etc.

ECE 4110 – Internetwork Programming

c programming language
C Programming Language
  • Yes, you need to learn C language (but not C++).
  • I will teach some basic concepts in C, but remember that this is not a C Programming course.
    • You have to study mostly by yourself.

ECE 4110 – Internetwork Programming

rules
Rules
  • Grading:
    • Three tests (20% each)
    • Final exam (20%)
    • Labs (20%)
  • Open books, but not notes
  • You know the difference between discussing with friends and cheating.

ECE 4110 – Internetwork Programming

introduction to computer networks
Introduction to Computer Networks
  • Network: Collection of devices (computers, printers, etc.) that are able to communicate with each other.
  • internet: Collection of more than one networks.
  • Internet: You know …

ECE 4110 – Internetwork Programming

internet hierarchy
Internet Hierarchy

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

introduction cont d
Introduction (cont’d)
  • Protocol: Set of rules that define what is communicated when and how.
  • Protocols are defined by standards:
    • De facto
    • De jure
  • Standard bodies, forums, and agencies:
  • ISO, ITU-T (formerly CCITT), ANSI, IEEE, EIA, Frame Relay Forum, ATM Forum, FCC.

ECE 4110 – Internetwork Programming

osi model
OSI Model

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

osi model cont d
OSI Model (cont’d)
  • Layered architecture
  • Peer processes
  • Interfaces between layers (use of primitives)
  • (1) Physical Layer: Transmits bit streams over a physical medium. [representation of bits; synchronization; transmission mode (simplex, half-duplex, full-duplex); etc.]

ECE 4110 – Internetwork Programming

osi model cont d1
OSI Model (cont’d)
  • (2) Data Link Layer: Provides link connectivity. [framing; physical addressing; flow, error, and access control]. MAC is a sublayer of data link layer.
  • (3) Network Layer: Provides network connectivity, i.e., delivery of packets from source to destination. Each packet is handled independently (no flow concept). [logical addressing; routing]

ECE 4110 – Internetwork Programming

osi model cont d2
OSI Model (cont’d)
  • (4) Transport Layer: Provides end-to-end connectivity, i.e., flow control for a sequence of packets. [SAP; segmentation and reassembly; connection, flow, and error control]
    • Connectionless
    • Connection-oriented

ECE 4110 – Internetwork Programming

sar in transport layer
SAR in Transport Layer

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

osi model cont d3
OSI Model (cont’d)
  • (5) Session Layer: Provides dialog control and synchronization.
  • (6) Presentation Layer: Provides syntax and semantics interoperability. [encoding translation; encryption; compression]
  • (7) Application Layer: Provides network virtual terminal, file transfer, mail, and directory services.
  • Actually, the last three layers are very thin or non-existent.

ECE 4110 – Internetwork Programming

data exchange in osi model
Data exchange in OSI Model

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

node to node delivery
Node-to-Node Delivery

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

end to end delivery
End-to-End Delivery

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

connecting multiple networks
Connecting Multiple Networks

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

repeater
Repeater
  • Physical layer.
  • Connects two segments of a LAN.
  • Regenerates the signal in one segment and transmits to the other.

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

slide22
Hub
  • Physical layer
  • Multiport repeater
  • Implements star topology.
  • Hub removes the length limitation. How ???

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

bridge
Bridge
  • Two layers.
  • Has filtering capability.
  • Most bridges today are transparent  they learn the physical (MAC) addresses of the stations connected directly.

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

router
Router
  • Physical, data link, and network layers.
  • Provides LAN/LAN, LAN/WAN, WAN/WAN connectivity. (Repeaters, hubs, and bridges connect the segments of the same LAN.)

* From TCP/IP Protocol Suite, B. A. Forouzan, Prentice Hall

router cont d
Router (cont’d)
  • Three important points about a router:
    • For each interface, there is one physical (MAC) and one logical (IP) address.
    • If the arriving packet at an interface is NOT destined to that interface, the router ignores the packet.
    • The router changes both the source and destination physical addresses in the packet.

ECE 4110 – Internetwork Programming

switch
Switch
  • Two-layer switch:
    • Unique interface for each terminal  no competing traffic.
    • A better design for bridge.
  • Three-layer switch:
    • Same as a router in functionality; just better in performance.
    • A better design for router.

ECE 4110 – Internetwork Programming

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