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Understanding TCP and UDP Protocols: Insights from MP7 Networking Assignment

In this session, we delve into the essential concepts of TCP and UDP protocols as part of the MP7 networking assignment submissions. Key benefits of TCP like reliable delivery, ordered data flow, and the 3-way handshake are contrasted with UDP’s advantages such as low overhead and statelessness. We explore practical applications of both protocols, including their use in streaming audio/video, instant messaging, and file transfers. Additionally, we introduce the upcoming MP8 assignment, focused on web server creation and socket programming.

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Understanding TCP and UDP Protocols: Insights from MP7 Networking Assignment

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  1. CS 241 Section(11/18/2010)

  2. In Section Today… • MP7 • Networking • File System Intro

  3. MP7 • MP7 is due tonight is 11:59:59pm. • Contest results based on due-date • Usual late submission policy applies for grading purposes (30% off for up to 1 day late) • Contest results announced in-lecture on Friday (at beginning of lecture) • Must be in attendance to claim prize • Some nice prizes by Intel

  4. MP7

  5. Networking Review • Major TCP Benefits • Connect via a 3-way handshake • Reliable, ordered delivery • Single endpoint per connection • TCP: • Extremely useful protocol features • High Overhead

  6. Networking Review • Major UDP Benefits • Stateless protocol • No connection, no pre-defined endpoint • Low overhead • No reliable delivery • No ordered delivery • Generally faster round trip time than TCP

  7. Networking Review • TCP and UDP BOTH Provide: • IP Routing • Port-based delivery • The address “192.168.1.1:80” could refer to TCP or UDP. • Q: How do we know that address is likely TCP?

  8. Networking Review • Would TCP or UDP be best to be used for… • Streaming Audio/Video?

  9. Networking Review • Would TCP or UDP be best to be used for… • Streaming Audio/Video? UDP • Instant Messaging?

  10. Networking Review • Would TCP or UDP be best to be used for… • Streaming Audio/Video? UDP • Instant Messaging? TCP • Simple File Transfer?

  11. Networking Review • Would TCP or UDP be best to be used for… • Streaming Audio/Video? UDP • Instant Messaging? TCP • Simple File Transfer? TCP • Short, infrequent status updates of non-essential information? • BitTorrent Peer Updates • DNS, DHCP, etc

  12. Networking Review • Would TCP or UDP be best to be used for… • Streaming Audio/Video? UDP • Instant Messaging? TCP • Simple File Transfer? TCP • Short, infrequent status updates of non-essential information? UDP • BitTorrent Peer Updates • DNS, DHCP, etc

  13. MP8 • MP8 is scheduled to be released on Monday over break (Nov. 22nd) • The MP is designed as a one-week MP. • However, you have 2.5 weeks to work on it. • One week during break • One full week after break, and until Wednesday of the next week.

  14. MP8 • Broad Topic: • Make a web server! • Programming Concepts Used: • Socket Programming • Multi-threaded Programming • More on it in section in two weeks…

  15. UNIX File Systems Introduction • Nearly every modern file system is based on a directory structure: • / • /usr/ • /usr/kingst/ • /usr/kingst/svn/ • /usr/kingst/svn/mp7/ • /usr/kingst/svn/mp7/alloc.c

  16. UNIX File Systems Introduction • Each and every directory contains at least two links to files: • /. A reference to itself. • /.. A reference to its parent. • Every other reference will be some form of a file or link.

  17. UNIX File Systems Introduction • Information about the contents of a directory is stored in a directory file. • A directory file is simply a table containing two pieces of information: • The i-node ID of the file • The name of the file

  18. UNIX File Systems Introduction • Information about the contents of a directory is stored in a directory file. • A directory file is simply a table containing two pieces of information: • The i-node ID of the file • The name of the file

  19. UNIX File Systems Introduction • Much like many MP7 implementations, an i-node simply contains data about a file. • File size • Location (on disk) of the file’s contents • Modification date, creation date, etc. • File’s owner • File’s permissions • … • NOT THE NAME OF THE FILE (directory file)

  20. UNIX File Systems Introduction

  21. UNIX File Systems Introduction • Main lecture will discuss more on i-nodes and file systems over the next week... • We’ll discuss i-node details next week

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