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      代寫ECE4016、Python設計編程代做
      代寫ECE4016、Python設計編程代做

      時間:2024-10-11  來源:合肥網hfw.cc  作者:hfw.cc 我要糾錯



      ECE4016 Assignment 1
      In this assignment, you are required to implement a simple Local DNS Server .
      Introduction
      The Domain Name System (DNS) is the hierarchical and decentralized naming system used to
      identify computers reachable through the Internet or other Internet Protocol (IP) networks. The
      resource records contained in the DNS associate domain names with other forms of information.
      These are most commonly used to map human-friendly domain names to the numerical IP
      addresses computers need to locate services and devices using the underlying network
      protocols, but have been extended over time to perform many other functions as well. The
      Domain Name System has been an essential component of the functionality of the Internet since
      1985. (wikipedia)
      Iterative query and Recursive query
      Detailed grading rule
      The local DNS server should have the following function:Listen and accept the DNS queries
      Send response to the clients
      Maintain a cache(20 points). If the ip address is queried before, it should be stored in the
      cache. if the answer for the query is found in cache, Local DNS Server send this answer to
      Client as the DNS response
      Support the DNS queries of www.baidu.com through recursive or iterative searching (30
      points)
      Support the DNS queries of www.example.com through recursive or iterative searching (20
      points)
      Support the DNS queries of www.baidu.com through public DNS server (15 points)
      Support the DNS queries of www.example.com through public DNS server (15 points)
      Requirements
      Print the ip address of all the servers you pass by during the searching
      Use a variable flag to indicate whether ask the public server for the IP address. When the
      flag is set to be 0 , ask the public server for the IP address. When the flag is set to be 1 do
      the recursive or iterative searching
      Make sure your program works under ubuntu 20
      Show how to execute your code
      The programming language should be Python(version 3.9)
      Dnspython is not allowed to use in this lab
      The server is required to work on port 1234 of 127.0.0.1
      Useful tools
      There are some useful tools that may help you in your programming. (Dnspython is not allowed
      to use in this lab)
      socket
      dnslibSimple test by yourself
      You can use dig to test your local NDS server.
      An example test code:
      dig www.example.com @127.0.0.1 -p 1234
      dig www.baidu.com @127.0.0.1 -p 1234
      Note that this test code will be used in the evaluation of this project, make sure your program
      works given this test code.
      Submission
      Due on 23:59, 13 Oct 2024(Late submission within 5 minitues is allowed without
      punishment)
      Every 24h late delivery will be deducted 10%, and 48h late delivery will be allowed at most.
      After 48h, 0 marks will be given for this assignment
      Honesty
      We take your honesty seriously. If you are caught copying others' code, you will get an
      automatic 0 in this project. Please write your own code.

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