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13 Pages

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Course: COSC 4377, Fall 2008
School: U. Houston
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Word Count: 844

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from Slides TCP/IP - Forouzan Chapter 16 DNS Name Space Domain Name Space Distribution of Name Space DNS in the Internet Resolution DNS Messages Types of Records Compression COSC 6377 - Fall 2000 16-1 Forouzan Notes Figure 16-1 Domain name space arpa com edu ... org ad ... zw Forouzan Notes COSC 6377 - Fall 2000 16-2 Forouzan Notes COSC 6377 - Fall 2000 16-1 Slides from TCP/IP -...

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from Slides TCP/IP - Forouzan Chapter 16 DNS Name Space Domain Name Space Distribution of Name Space DNS in the Internet Resolution DNS Messages Types of Records Compression COSC 6377 - Fall 2000 16-1 Forouzan Notes Figure 16-1 Domain name space arpa com edu ... org ad ... zw Forouzan Notes COSC 6377 - Fall 2000 16-2 Forouzan Notes COSC 6377 - Fall 2000 16-1 Slides from TCP/IP - Forouzan Figure 16-2 Domain names and labels Root Label Label Label Label edu edu. Domain name Label Label fhda Label Label atc Label Label challenger challenger.atc.fhda.edu. Domain name atc.fhda.edu. Domain name fhda.edu. Domain name Forouzan Notes COSC 6377 - Fall 2000 16-3 Figure 16-3 FQDN and PQDN FQDN challenger.atc.fhda.edu. cs.hmme.com. www.funny.int. PQDN challenger.atc.fhda.edu cs.hmme www Forouzan Notes COSC 6377 - Fall 2000 16-4 Forouzan Notes COSC 6377 - Fall 2000 16-2 Slides from TCP/IP - Forouzan Figure 16-4 Domains com Domain edu Domain Domain Domain Domain Forouzan Notes COSC 6377 - Fall 2000 16-5 Figure 16-5 Hierarchy of name servers root server arpa server ... fhda.edu edu server ... bk.edu com server ... irvin.com us server ... mcgraw .com ... Forouzan Notes COSC 6377 - Fall 2000 16-6 Forouzan Notes COSC 6377 - Fall 2000 16-3 Slides from TCP/IP - Forouzan Figure 16-6 Zones and domains Root com mhhe Zone Domain Zone and domain Forouzan Notes COSC 6377 - Fall 2000 16-7 Figure 16-7 DNS used in the Internet Root ... Inverse domain Generic domains ... Country domains Forouzan Notes COSC 6377 - Fall 2000 16-8 Forouzan Notes COSC 6377 - Fall 2000 16-4 Slides from TCP/IP - Forouzan Figure 16-8 Root level Generic domains com edu gov int mil net org fhda ... atc ... chal ... chal.atc.fhda.edu. Index to addresses Generic domains Forouzan Notes COSC 6377 - Fall 2000 16-9 Figure 16-9 Root level Country domains ae ... fr ... us ... zw ca cup anza anza.cup.ca.us. Index to addresses Country domains Forouzan Notes COSC 6377 - Fall 2000 16-10 Forouzan Notes COSC 6377 - Fall 2000 16-5 Slides from TCP/IP - Forouzan Figure 16-10 Inverse domain Root level arpa in-addr 132 34 45 121 Inverse domain Forouzan Notes 121.45.34.132.in-addr.arpa. Index to names COSC 6377 - Fall 2000 16-11 Figure 16-11 Recursive resolution root server 3 edu 2 9 1 client fhda.edu mcgraw.com 8 7 6 5 4 com ... 16-12 10 Forouzan Notes COSC 6377 - Fall 2000 Forouzan Notes COSC 6377 - Fall 2000 16-6 Slides from TCP/IP - Forouzan Figure 16-12 Iterative resolution 5 6 root server com 3 edu 4 1 client 2 7 8 9 10 Forouzan Notes COSC 6377 - Fall 2000 16-13 fhda.edu mcgraw.com Figure 16-13 DNS messages Messages Query Response Forouzan 6377 Notes COSC - Fall 2000 16-14 Forouzan Notes COSC 6377 - Fall 2000 16-7 Slides from TCP/IP - Forouzan Figure 16-14 Query and response messages Header Question section a. Query Header Question section Answer section Authoritative section Additional section b. Response Forouzan Notes COSC 6377 - Fall 2000 16-15 Figure 16-15 Header format Identification Number of question records Number of authoritative records (All 0s in query message) Flags Number of answer records (All 0s in query message) Number of additional records (All 0s in query message) Forouzan Notes COSC 6377 - Fall 2000 16-16 Forouzan Notes COSC 6377 - Fall 2000 16-8 Slides from TCP/IP - Forouzan Figure 16-16 Flags field QR OpCode AA TC RD RA Three 0s rCode Forouzan Notes COSC 6377 - Fall 2000 16-17 Figure 16-17 Question record format Query name Query type Query class Forouzan Notes COSC 6377 - Fall 2000 16-18 Forouzan Notes COSC 6377 - Fall 2000 16-9 Slides from TCP/IP - Forouzan Figure 16-18 Query name format Count Count Count Count Count 5 a d m i n 3 a t c 4 f h d a 3 e d u 0 Forouzan Notes COSC 6377 - Fall 2000 16-19 Figure 16-19 Resource record format Domain name Domain type Time to live Resource data length Domain class Resource data Forouzan Notes COSC 6377 - Fall 2000 16-20 Forouzan Notes COSC 6377 - Fall 2000 16-10 Slides from TCP/IP - Forouzan Figure 16-20 Format of an offset pointer 11 2 bits Address of the beginning byte 14 bits Forouzan Notes COSC 6377 - Fall 2000 16-21 Figure 16-21 Example of a query message 0x1333 1 0 4 'l' 'd' 'd' 1 'c' 4 'a' 'u' 1 'h' 'f' 3 0 0x0100 0 0 'a' 'h' 'e' Continued on next line Forouzan Notes COSC 6377 - Fall 2000 16-22 Forouzan Notes COSC 6377 - Fall 2000 16-11 Slides from TCP/IP - Forouzan Figure 16-22 Example of a response message 0x1333 1 0 4 'l' 'd' 'd' 1 0x0C 1 4 18 Forouzan Notes 0x8180 1 0 'c' 4 'a' 'u' 1 1 12000 'h' 'f' 3 0 'a' 'h' 'e' Continued on next line 0xC0 Continued on next line Continued on next line 153 105 16-23 8 COSC 6377 - Fall 2000 Figure 16-23 Example of inverse query message 0x1200 1 0 1 1 '5' 'n' 'd' 'r' 12 Forouzan Notes 0x0900 0 0 '9' '2' '3' '-' 'r' 'p' 1 3 7 'a' 4 'a' 1 COSC 6377 - Fall 2000 16-24 '7' '1' 'i' 'd' 'a' 0 Forouzan Notes COSC 6377 - Fall 2000 16-12 Slides from TCP/IP - Forouzan Figure 16-24 Example of inverse response message 0x1200 1 0 1 1 '5' 'n' 'd' 'r' 12 0xC00C 1 24000 4 'e' 'm' 'm' 3 0 COSC 6377 - Fall 2000 16-25 0x8D80 1 0 '9' '2' '3' '-' 'r' 'p' 1 3 7 'a' 4 'a' 1 12 Continued on next line 10 'h' 'c' 'h' 'o' '7' '1' 'i' 'd' 'a' 0 Forouzan Notes Forouzan Notes COSC 6377 - Fall 2000 16-13
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U. Houston - COSC - 4377
Slides from TCP/IP - ForouzanChapter 4IP Addressing Decimal Notation Classes Special Addresses A Sample Internet Unicast, Multicast, and Broadcast Addresses Applying for IP Addresses Private NetworksCOSC 6377 - Fall 2000 4-1Forouzan Not
U. Houston - COSC - 4377
COSC 4377, Fall 200011/20/00Link Layer Protocols1Link Layer Services Framing and link access: m encapsulate datagram into frame adding header and trailer, m implement channel access if shared medium, m` physical addresses'are used in frame h
U. Houston - COSC - 4377
COSC 4377, Fall 200011/2/00Routing in the InternetThe Global Internet consists of Autonomous Systems (AS) interconnected with each other:r r rStub AS: small corporation Multihomed AS: large corporation (no transit) Transit AS: providerT
U. Houston - COSC - 4377
COSC 4377, Spring 2001 - Socket Programming1/29/01Socket programmingGoal: learn how to build client/server application that communicate using sockets Socket API introduced in BSD4.1 UNIX,socketa host-local, applicationcreated/owned, OS-contr
U. Houston - COSC - 4377
COSC 4377, Spring 2001, RPC - Supplement2/27/01Remote Procedure CallOutlineProtocol Stack Presentation Formattingbased on section 5.3 of Peterson & Davies bookPeterson & Davie 1RPC TimelineClientReque stServer BlockedBlockedReplyC
U. Houston - COSC - 4377
COSC 4377, Fall 2000 - Chapter 3a10/10/00Chapter 3: Transport LayerChapter goals: understand principlesChapter Overview:behind transport layer services:r transport layer services multiplexing/demultiplexing connectionless transport: UD
U. Houston - COSC - 4377
COSC 4377, Fall 200011/27/00Hubs, Bridges, and Switches (oh my)Used for extending LANs in terms of geographical coverage, number of nodes, administration capabilities, etc. Differ in regards to:r rcollision domain isolation layer at which t
U. Houston - COSC - 4377
Slides from TCP/IP - ForouzanChapter 24Socket Interface Sockets Socket System Calls Connectionless Iterative Server UDP Client-Server Programs Connection-Oriented Concurrent Server TCP Client-Server ProgramsForouzan NotesCOSC 6377 - Fal
U. Houston - COSC - 4377
COSC 4377, Spring 2001 - Chapter 4b4/4/01IP datagram formatIP protocol version number header length (bytes) "type" of data max number remaining hops (decremented at each router) upper layer protocol to deliver payload to 32 bits ver head. type o
U. Houston - COSC - 4377
Slides from TCP/IP - ForouzanChapter 5Subnetting and Supernetting Subnetting Masking Examples of Subnetting Variable-Length Subnetting SupernettingForouzan NotesCOSC 6377 - Fall 20005-1Figure 5-1A network with two levels of hierarc
U. Houston - COSC - 4377
COSC 4377, Spring 2001 - Chapter 2, Part A9/18/01chapter 2: Application LayerChapter goals:conceptual + implementation aspects of network application protocols m client server paradigm m service models r learn about protocols by examining popul
U. Houston - COSC - 4377
COSC 4377, Spring 20011/24/01Protocol "Layers"Networks are complex! many "pieces": r hosts r routers r links of various media r applications r protocols r hardware, softwareIs there any hope of organizing structure of network? Or at least our
U. Houston - COSC - 4377
COSC 4377, Spring 20011/22/01Part I: IntroductionChapter goal: get context, overview, "feel" of networking more depth, detail later in course approach: r descriptive r use Internet as example Overview: what' the Internet s what' a protocol?
U. Houston - COSC - 4377
COSC 4377, Spring 2001 - Chapter 5b4/4/01LAN technologiesData link layer so far:rNext: LAN technologiesrservices, error detection/correction, multiple accessaddressing r Ethernet r hubs, bridges, switches r 802.11 r PPP r ATM5: DataLink
U. Houston - COSC - 4377
COSC 4377, Spring 2001 - Chapter 2, Part A1/29/01Chapter 2: Application LayerChapter goals: conceptual +implementation aspects of network application protocolsrMore chapter goals specific protocols:r r r r rhttpclient server paradigm
U. Houston - COSC - 4377
COSC 4377, Fall 2000 - Chapter 3b10/24/00TCP: Overview RFCs: 793, 1122, 1323, 2018, 2581point-to-point:rone sender, one receiverfull duplex data:rreliable, in-order byte steam:rrpipelined:rno message boundaries TCP conges
U. Houston - COSC - 4377
COSC 4377, Fall 2000 - Chapter18/29/00Part I: IntroductionChapter goal: get context, overview, feel of networking more depth, detail later in course approach: r descriptive r use Internet as example Overview: what the Internet s what a prot
U. Houston - COSC - 4377
COSC 4377, Fall 2000 - Chapter 4a10/26/00Chapter 4: Network LayerChapter goals: understand principlesChapter Overview:behind network layer services:r r r r network layer services routing principle: path instantiation androuting (pat
U. Houston - COSC - 4377
COSC 4377, Spring 20018/29/01Part I: IntroductionChapter goal: r get context, overview, "feel" of networking r more depth, detail later in course r approach: m descriptive m use Internet as example Overview: r what' the Internet s r what' a prot
U. Houston - COSC - 4377
COSC 4377, Fall 2000 - Chapter 2 Part B9/25/00DNS: Domain Name SystemPeople: many identifiers:rSSN, name, Passport #Domain Name System: distributed databaseInternet hosts, routers:rrIP address (32 bit) used for addressing datagrams
U. Houston - COSC - 4377
COSC 4377, Spring 2001 - Chapter 74/24/01Chapter 7: Network securityFoundations: Security in practice:what is security? cryptography authentication message integrity key distribution and certificationapplication layer: secure e-mail
U. Houston - COSC - 4377
COSC 4377, Spring 2001 - Chapter 5a4/4/01Chapter 5: The Data Link LayerOur goals: understand principlesOverview:behind data link layer services:r link layer services error detection, correction multiple access protocols andrr rer
U. Houston - COSC - 4377
Part I : I ntroductionC hapte goal: r ge conte ove w, "fe l" t xt, rvie e of ne tworking m de ore pth, de late in tail r course approach: r de scriptive r useI nte t as e rne xam ple Ove w: rvie what's theI nte t rne what's a protocol? ne twor
U. Houston - COSC - 4377
Errata=We all occasionally make mistakes. We're proud of the quality of ourtextbook, but in a first edition book with more than 700 pages, a coupleof typos are bound to slip in. The errata below lists the mistakes thatwe'll fix in the next pr
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COSC 6377, Fall 200011/2/00HTTP Protocol, Proxy,andCOSC 6377 Term Project TutorialT. Mark Huang http:/www.cs.uh.edu/~jsteach/cosc6377/The Web: the http protocolhttp: hypertext transfer protocol Web application layer s protocol client/ser
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CS 4310 Programming Exercise Building a ParserDue Date: Midnight, Monday, Oct 23 Using bison, you are to write a parser for a subset of Pascal. A grammar for this language appears below: start block procdcls procdcl parmlist parms parm variables var
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CS 4310 Programming Exercise Building a ParserDue Date: Midnight, Monday, Oct 23 Using bison, you are to write a parser for a subset of Pascal. A grammar for this language appears below: start block procdcls procdcl parmlist parms parm variables var
U. Houston - COSC - 4377
FAQ for Assignment #4, COSC 4377, Fall 2000Last update: Nov. 22, 20001) Do we have to use select()? [11/13/2000]A: No. I planned to use select() for this assignment. After I ran some sample programs and found that recvfrom() can take more t
U. Houston - COSC - 4377
COSC 4377, Fall 2000HW2HW2HW2UIDHW1discprogtotalHW3HW4MT#1MT#2FinalTotal===========ABE181201141349819570548274.80AKM8100451401859620070526272.05ASM269451071529818580427572.10BHM26620114
U. Houston - COSC - 4377
Bring a file under RCS control:RCS is a software tool for UNIX systems which lets people manage multiplerevisions of files. RCS saves all old revisions and does it in a spaceefficient way. Old revisions can be retrieved according to the revision
U. Houston - COSC - 4377
Bring a file under RCS control:RCS is a software tool for UNIX systems which lets people manage multiplerevisions of files. RCS saves all old revisions and does it in a spaceefficient way. Old revisions can be retrieved according to the revision
U. Houston - COSC - 4377
Chapter 4: Network LayerChapter goals: understand principlesOverview:selectionbehind network layer services:r r r r network layer services routing principle: path hierarchical routing IP Internet routing protocols instantiation andr
U. Houston - HW - 2
COSC 6318 Object-Oriented Analysis and DesignHomework #2Due: 5:15PM Feb. 28thFor the problem statement given below, 1. Draw a usecase diagram showing actors and usecases 2. Provide the flow of events for each use case, listing the basic paths
U. Houston - ASSIGN - 1
Assignment 1 Due Monday April 25th 6PM Homework #4 due Monday April 25th 6PM Feel free to ask any questions over the email. Please note that this is not a group effort. Assume that I am asked to write a middle tier (I am not required to writer the UI
U. Houston - HW - 3
Homework #3 Due April 19th 6PM in class. Name: _ Student ID: _A few problem statements are given below. For each one of them answer the following questions: (a). What creational pattern you may use to solve this problem? (b). Explain how you would
U. Houston - ASSIGN - 1
Assignment 1 Due Monday April 12th 6PM Online submission (Note: The online submission will refuse to accept assignments after the deadline You are asked to submit the assignment ahead of time and as many times as you please. Your last submission will
U. Houston - ASSIGN - 2
Assignment 2 email zip of all your code by 11:59PM May 9thThis is not a group project. Beware of the Academic Honesty Policy.Write a C+, Java or .NET program that will allow you to design a kitchen.The program presents a list of appliances you c
U. Houston - HW - 1
COSC 6318 HW1 Due Monday February 23th 5:45PM(Note. No late submissions will be accepted)Please turnin a hard copy in class. Remote students, please hand over thecopy to your remote site administrator by the deadline.Name: _ Student ID: _A
U. Houston - HW - 3
HW 3 Due April 18th 6PM1. What OO Design Principle is evident in the application of Iterator Pattern on different types of collections? 2. One major concern about implementing an interface to traverse through a collection is performance. Ho
U. Houston - HW - 1
COSC 6318 Object-Oriented Analysis and DesignSpring 2003Homework #1Due Feb. 19th 5:45PM in classDevelop the class diagram (in UML) for the following system. A "draw" utility program lets users draw several geometric objects on adiagr
U. Houston - HW - 4
HW4 Due Thursday April 30 7PM in classIn the Design Pattern text book on page 153, it reads"(C+) you want to hide the implementation of an abstraction completelyfrom clients. In C+ the representation of a class is visible inthe class interface
U. Houston - HW - 4
Homework 4 hard copy due April 22 5:45PMAnswer these questions based on your solution to Assignment 1.1. Draw a UML diagram showing the classes and the relationships.2. How did you provide extensibility in your program. 3. What design pri
U. Houston - HW - 5
Homework #5: Due Monday May 1st in class.1. Draw UML diagram for your solution in Assignment 2 questions 1.2. Draw UML diagram for your solution in Assignment 2 questions 2.3. Explain what are the benefits and disadavantages, with reference to
U. Houston - ASSIGN - 1
Assignment 1. Hard copy due on April 21st 5:45PM.Submit copy of all code you write.Problem. The objective of this assignment is to practise the useof some design patterns. You first need to identify what patterns will be useful in the following
U. Houston - HW - 3
COSC 6397 Object-Oriented Analysis and DesignSpring 1999Homework #3 Due Monday April 12th in classThe objective of this homework is to practice Inheritance and Polymorphism with OCP, LSP and DIP in mind. Several ty
U. Houston - HW - 5
Due along with your Assignment 2.Mention five recommendations from extreme programming.For each, write one or two sentences explaining thebenefit of the recommendation.
U. Houston - ASSIGN - 2
COSC 6318 Assignment 2. Due May 5th during demoYou are asked to build a library or module (in a languageof your choice: Java or C+). Your module will primarily consist of a bunch of classes to determine some ones credibility. Thecredibility may
U. Houston - HW - 3
COSC 6318 Object-Oriented Analysis and DesignHard copy HW3 Due March 27th in classGiven below is the use-case flow of events for a system. Develop the analysis model for this system, based on the given use-case. Present the following 1. Collab
U. Houston - HW - 3
COSC 6318 Object-Oriented Analysis and DesignHomework #3Due: 5:45PM April 2ndFor the problem stated in HW2, a use case model with the flow of eventsis given here. 1. Draw the collaboration diagrams for each flow of events.2. Draw a package
U. Houston - ASSIGN - 2
If you will be using C+, please use thegiven LegalStatus.h and LegalStatus.cpp.For other classes (Person, CreditRecords, CriminalRecords),please modify the code as you please from the Java directory.
U. Houston - ASSIGNMENT - 1
Assignment 1: Due October 2nd(Email code to Venkat by midnight and cc your buddy)In this assignment we will create a program to playMaster Mind.You are expected to create two parts. A Decoder class thatdeals with the logic (create it using tes
U. Houston - ASSIGN - 4
Assignment 4: Due 11:59PM May 11thFor the problem mentioned in Assignment 3 create the applicationwith following "features":1. Visiting the application at http:/localhost:3000 should bring upthe relevant page for books list2. This page must co
U. Houston - ASSIGNMENT - 4
Assignment 4: Due 11:59PM December 8thFor the problem mentioned in Assignment 3 create the applicationwith following "features":1. Visiting the application at http:/localhost:3000 should bring upthe relevant page for tasks2. This page must con
U. Houston - HW - 1
124 9 139 9 324 9 341 9 347 9 588 9 637 8 726 9 734 9 863 9 865 9 (Why would you inherit Person from StandardError?!)925 9 926 8 976 9 If you have questions, please talk to Venkat in Person.No emailes regarding grading p
U. Houston - ASSIGN - 2
124 100139 100 324 100341 90 Code has warnings. Not DRY - db definition in multiple files347 80 Search by keyword not in first level menu. Problems with multiple authors588 90 Search by author not functioning well637 100726 80 Search and filte
U. Houston - HW - 3
124 9 Multiple clicks on fetch not handled well139 10324 9 Multiple clicks on fetch not handled well341 10347 10588 10637 10726 5 Does not work as expected734 10863 10865 10925 10926 0 Quick look at submitted files does not point to solu
U. Houston - HW - 3
You lost points if1 - You have way too much code - should have used prototype, for instance.1 - Your code (any of the versions you submitted) does not work with IE 7.1 - Clicking multiple times on Fetch pollutes the table with redundant info (or
U. Houston - HW - 4
You lost points if- you did not provide adequate information- you did not include any or sufficient references
U. Houston - HW - 2
You lost points if you Did not close the test data file that you opened.You are accumulating quite a bit of data in a string - not elegant.
U. Houston - ASSIGNMENT - 2
If you lost points, the following may be reason(s)You're performing validation logic in a place other than the model.Some tests are failingDid not have any tests (for validation logic, for example)When run, your program says ".in `method_missi
U. Houston - SCHATZKES - 3242
Slideshow for Ketelsen Employees Who Use a Computer on CampusPlease ensure that your computer is protected from virus's. Follow this slide show for step by step instructions for downloading Trend Virus Protection1Instructions for downloading Tre