What is Domain: Definition and 741 Discussions

A domain name is an identification string that defines a realm of administrative autonomy, authority or control within the Internet. Domain names are used in various networking contexts and for application-specific naming and addressing purposes. In general, a domain name identifies a network domain, or it represents an Internet Protocol (IP) resource, such as a personal computer used to access the Internet, a server computer hosting a website, or the web site itself or any other service communicated via the Internet. In 2017, 330.6 million domain names had been registered.Domain names are formed by the rules and procedures of the Domain Name System (DNS). Any name registered in the DNS is a domain name. Domain names are organized in subordinate levels (subdomains) of the DNS root domain, which is nameless. The first-level set of domain names are the top-level domains (TLDs), including the generic top-level domains (gTLDs), such as the prominent domains com, info, net, edu, and org, and the country code top-level domains (ccTLDs). Below these top-level domains in the DNS hierarchy are the second-level and third-level domain names that are typically open for reservation by end-users who wish to connect local area networks to the Internet, create other publicly accessible Internet resources or run web sites.
The registration of these domain names is usually administered by domain name registrars who sell their services to the public.
A fully qualified domain name (FQDN) is a domain name that is completely specified with all labels in the hierarchy of the DNS, having no parts omitted. Traditionally a FQDN ends in a dot (.) to denote the top of the DNS tree. Labels in the Domain Name System are case-insensitive, and may therefore be written in any desired capitalization method, but most commonly domain names are written in lowercase in technical contexts.

View More On Wikipedia.org
Recent contents Top users
  1. E

    Explaining Why Z[-7] Is Not a Euchlidean Domain

    I know this is a physics forum but I've got a quick question about a Euchlidean domain: Assuming that 1 - \sqrt {-7} and 2 are irreduclible, explain why Z[-7] is not a euchlidean domain? This is a pure maths question and I've asked questions about other pure maths courses and got decent...
  2. E

    Buy Domain Name - Low Prices & Easy Process

    In the domain type as I see, they say About hosting service they say Is that cheap ? I only want to buy a domain and then build a homepage introducing about me, nothing more. Thank you
  3. R

    News Should Eminent Domain Be Recalled by Popular Vote?

    http://www.newsmax.com/archives/articles/2005/10/17/145458.shtml
  4. B

    Find domain of (2+x-x^2)/((x-1)^2)

    Could someone find the domain, intercepts, asymptotes, critical numbers, local min and max, absolute min and max, concavity, and inflection points of the function: (2+x-x^2)/((x-1)^2) Thank you it would be much appreciated
  5. O

    Viewing Your Forum on Your Computer Before Registering a Domain

    I downloade a forum but how can i see my forum on my computer. I not register web host/ domain yet. I want to play with it on my computers first. Can u tell me how to do that, what should I download and where should I put my forums so I can see my forums as I want to see my forums on my computer...
  6. N

    Find Domain of f o g: Solve x^2+11

    I am having problems with finding the domain of the composition of f and g(fog) for example, f(x)=x+7 and g(x)=x^2+4, the fog(x)=x^2+11, but from there i don't know how to find the domain, please help
  7. W

    Find the domain of the vector functions

    Find the domain of the vector functions, r(t), listed below a.) r(t) = <ln(6t), sqrt(t+14), 1/sqrt(16-t)> i don't extactly know how to approach this, can someone give me a hint or two
  8. A

    Tangent Properties Symmetry, domain, asymptotes, zeroes

    y=-2\tan (3x+\pi) +3 state the following period = \frac {\pi} {3} y-intercept=3 Range = {y: yER} Domain= {x: ?} Symmetry? Vertical Asymptotes? Zeros? Can someone please tell me how to figure out what is left there are so many zeroes and i can't read them off of my...
  9. happyg1

    Proof of Uncountable Domain for f:A-->B

    hi, the question I am working on is this: If f:A-->B and the range of f is uncountable, prove that the domain of f is uncountable. Intuitively this seems to be true. If the range is uncountable, then function has to map an uncountable number of elements from the domain to the range. I don't...
  10. M

    News Supreme Court Ruling on Eminent Domain

    What is all this hubub about eminate domain and the Supreme Court? :uhh:
  11. exequor

    Approval of .XXX Domain: A Positive Step?

    I don't know why there is such hatred against the approval of the dot-xxx domain. Personally I think that it is a great idea because the whole idea of domains is to categorize websites, right? Getting all adult content on this domain is another challenge but it's a good call.
  12. S

    Observation,From quantum locality to Macro Domain

    Does a Quantum System know about an observer before the Observer can know about the Quantum System? Quantum domains are small, Macro Domains are larger,so when one looks from a Macro Domain to one that is smaller(Quantum) one first has to locate the Quantum System to be observed, then because...
  13. E

    MATLAB Matlab help (Root Locus using Z Domain)

    I'm trying to prooduce a plot of a root locus for an open loop transfer function. The transfer function is in the z-domain, with a gain K. I've already solved for the charectoristic equation of the system by hand. But, how do I use Matlab to plot the root locus of a transfer function in...
  14. D

    A weird domain and range? anybody up for a challenge

    A weird domain and range? anybody up for a challenge y=x^2-2x+1 / x^2-x-2 try it on the gfx calculator and check if this domain and range is right i wrote Domain ( -infinity, -1 ) union (-1,2) union ( 2, infinity) range (-infity, 0) union (-1 to infity) is there an easier way to...
  15. A

    Can anyone help me find the natural domain and range of[tex]f(x) =

    can anyone help me find the natural domain and range of f(x) = 1 - log_3x *the whole equation is under a square root sign, its just a couldn't latex it
  16. J

    What is the Domain and Range for f and g?

    domain and range question! Hi, I have a quick domain and range question, I have placed my answer below the question. I'm having doubts that it is right! Can someone please help me verify it. Thanks in advance! _____ Let f(x)= x² + 2 and g(x) =√1-x²...
  17. D

    Dealing with Domain Problems in Plotting: A Mathematician's Dilemma

    I'm having a bit of difficulty plotting y=\left( \frac{3}{2} \right) ^{1/3} \arcsin ^{2/3} x \qquad -1 < x < 1 I don't know how to work around the problem associated with the domain of \arcsin x. Is there any way to do it? Any help is highly appreciated.
  18. M

    Average Domain Size & Permanent Magnet Creation

    what is the average size of a domain? and how are "permanent" magnets made? thanks, erin.
  19. A

    How to solve 2 - 2sin^2(theta) = cos(theta) on the domain [0,2pi]

    2-2\sin^2(\theta)=\cos (\theta) I need to solve this quadratic trig equation algebraically of the domain 0<=x<=2pi I know how to do that but in order to solve the trig functions have to be the same I'm having a little trouble how do I change the cos into sin? It's not cos^2 so we can't use...
  20. G

    How do you find the domain just by looking at the equation?

    How do you find the domain just by looking at the equation? ex1) x^2/ x^4+4x-5 2) t/√(t^2-5t+6) 3) √[2-√(4-x)]
  21. E

    Exploring the Domain and Range, X-Intercept, and Vertical Asymptote of y=logx^4

    y=logx4 state domain and range, x-intercept, vertical asymptote. I have never seen a question like this before. Please help me!
  22. E

    How can I plot a function in Laplace domain using my time-domain data?

    This is not a Bode plot question, but similar. I have data on the laplace transform of a tracer response at different times, "t". I want to plot the response against "s". Since the Laplace transform of t is 1/s^2, do I convert to "s" by s=(1/t)^.5?
  23. quasar987

    Double Integral of f(x,y) in a Triangle Domain

    I am asked to calculate the double integral of the function f(x,y) = (2x+3y)^2 = 4x^2 + 12xy + 9y^2 on the domain defined by a triangle whose summits(?) are at (-1,0), (0,1) and (1,0). I chose to integrate from left to right. So the bounds of my integral are \int_0^1 \int_{y-1}^{1-y}...
  24. A

    What are the domain and range of the function y=2(3^x)-1?

    I was given the equation y=2(3^x)-1 and told to state the domain, range, x and y intercepts and asymptotes. I graphed the eqn and got the x-intercept to =-0.63 and the y-intercept=1 the vertical asymptote is the same as x-intercept so =-0.63 and the horizontal asymptote always equals 0...
  25. A

    What is the Domain and Range of y=2(3^x)-1?

    I was given the equation y=2(3^x)-1 and was told state the domain, range, x-intercept(s) y-intercept(s) and asymptote(s) I graphed the equation and I think the x-intercept is -0.63 I subbed in 0 for the x value on the graphing calculator and got y-intercept=1 the vertical asymptote is the...
  26. T

    Set Up Domain: Help Redirect URL to Hosted Site

    I bought the domain www.utoe.org threw web.com and I have no Idea how to redirect the url to the one where I have my site hosted? could someone help me.
  27. P

    What is the Domain and Range of a Function with Given Constraints?

    I'm a little confused here. I have a function: f(x) = x^2 + 3 If the domain of the function is -3 <= x <= 3 I need to find the range... I think that the answer is 3 <= y <= 12... that can be found out by drawing the graph. But I want to find the range algebraically. It says in my...
  28. R

    Is 8 a Relative Max of F in the Given Domain?

    In class today we were doing a problem where we were given the graph of f (the derivitive of F). The domain was -3<x < or = 8 f(8)=0 and f had changed from positive <8 to 0, indicating a probable relative max (the function looked like a sinusoid, but the points after 8 were not graphed...
  29. E

    Exploring the Domain of A(x) Function

    This is my first encounter with this function. In the question at hand it's defined as A(x) = 1 + x^3/(2)(3) + x^6/(2)(3)(5)(6) + x^9/(2)(3)(5)(6)(8)(9) + ... and on like that to infinity. The question is to find the domain of this function. Here's what I have so far. The domain would mean...
  30. U

    Finding the domain without a calculator

    Finding the domain is easy with a graphing calculator but what if I was to do it without one. Is there a way to do it? How would I find the domain of f(x)=(x-1)/(x^2+1)
  31. S

    Domain and Range of (f.g)(x) & (f/g)(x)

    If f(x)=x/(x-1) and g(x)=1/(x+3) what is the domain and range of (f.g)(x) and (f/g)(x)? Are the domains the same? I got: Domain of f is all x not equal to 1 or -3. The range is all real numbers. x/(x-1)(x+3) Domain of g is all x not equal to 1, but it can't be equal to -3 either because...
  32. S

    How do you add functions with equal domain sets?

    Two functions are said to be equal if they ahve the same domain and, for each value in the domain set, the function values are equal respectively. F = {(2,3),(3,4),(4,5) G = {(3,4),(4,5),(2,3) The domain sets are equal, and f(x) = g(x) for each corresponding value of the domain. Tow...
  33. T

    What is the domain of 15x^2 + 3x - sqrt2 (x)?

    Find the domain? How would I go about finding the domain of: 15x^2 + 3x - sqrt2 (x) trip7
  34. F

    The domain of a composite function

    my previous calculus teacher stressed finding the domain of a composite function; he stressed more of finding which areas were not part of the function by means of three circles and saying the function didn't pass to the other circle unless it met the range of the other function. The textbook...
  35. A

    Find Domain of (F∘G)(x): Example

    Questoin...I have allways done these by evaluating (F 0f G)(x) ...then finding the domain of G and then useing a graphing calculator to find the domain of the whole thing as a function. My question is how do you algebracially fine the domain of the function after you find the domain of G int the...
  36. P

    Grade 12 Student Seeking Help on Environmental Impact of Fossil Fuel Use

    Good day to all the members on the forum site. I'm currently a Grade 12 student and I'll probably be needing help...not daily, but on days that I really need it. So I only have 1 question today: What is the environmental significance for the amount of fossil fuel use? If someone could...
  37. C

    Adding f(x) and g(x): Domain and Output

    If f(x) = square root of x and g(x) = x + 1, then: 1. What is f+g(x)? 2. Domain of f+g(x)? 3. What is f(g(x))? 4. What is the domain of f(g(x))? I put: 1. square root of x + x + 1 2. x >= 0 3. square root of x + 1 4. All real numbers? Thanks.
  38. S

    Domain: deceivingly simple, turns evil

    I wonder what went wrong here: Find the domain of f(x)=sqrt(1-sqrt(1-x2)) So of course the term under the radical must be greater than or equal to zero. For neatness I ignore the equal part. 1-sqrt(1-x2)>0 1>sqrt(1-x2) both left and right are positive, so 1>1-x2 x2>0 But it seems to...
  39. L

    What is the domain of F(x) = √(x^2 - 49)?

    ok guys, I need some help. I have been working on this problem for half an hour and I am stuck. Every answer I have came up with has been wrong. Here is the problem, find the domain of this function: F(x)=square root of x^2-49 Thanks for your help.
  40. Loren Booda

    Voice-activated camera shutter - public domain

    Would resultant photographs/videos be improved by equipping (still) cameras with a voice-activated shutter or (still/video) cameras with other voice-activated functions? Mine would be, as I shake and jerk indelicate mechanical shutters. Cheese!
  41. Loren Booda

    EKG feedback defibrillator - public domain

    EKG feedback "defibrillator" - public domain Imagine placed around the chest, with an array of EKG sensors, a band of fabric positioned for determining a three-dimensional cardiac potential. Now consider this elastic array not only to diagnose immediate specific pathologies, but also to treat...
Back
Top