Difference between hirarchical network topology and flat network topology?
● Flat: where all the interconnection equipment have the same functions. Topology is easier to implement and has a great ease of management, provided that the network does not increase, then being recommended for small networks.
● Hierarchical: In this model the topology is divided into discrete layers, and
each layer is focused on a set of specific functions, allowing the choice
correct equipment for each layer. A typical hierarchical topology is
composed of layers of core, composed of high-tech equipment,
optimized for performance and availability, distribution, where they are
concentrated equipment that control the flow of information across the network and
access layer, formed by equipment that provides the connections for the
network users.
Rafael Carvalho
Factors to consider before choosing a network topology?
income<cost>
the cable length
type of cable i.e utp
What does it mean for a subspace of a topological space to be ''somewhere dense''?
Somewhere dense is defined to be the following:
Let B, t be a topological space and C ⊂ B. C is somewhere dense if (Cl C)o ≠Ø, the empty set. That is, if the closure of the interior of C has at least one non-empty set.
See related links for more information.
Is every point of an open set E contained in R2 a limit point of E?
In reply to "limit point", posted by Jennifer on Sept 24, 2004:
>I have a basic question. Thanks a lot.
>
>Is every point of every open set E (is contained in R^2) a limit point of E?
Yes, it is. If O is open and x is in O then some open ball B(x,e) is contained in O
(as x is an interior point of O).
But open balls in R^2 have the property that they contain many more points than just x
(eg also (x_1 + 1/2*e, x_2) for x = (x_1, x_2), and e>0 ) and so if B(x,r) is any neighbourhood
of x, then B(x, min(r,e)) will contain this point, which is in O (as B(x,e) \subset O) and not equal to x.
So x is a limit point of O.
>In case of for clsed sets in R^2?
>
There it fails, eg if C = {(1/n, 0): n in N}.
No point of C is a limit point of C (but (0,0) is), as is easily checked.
Henno
What is the difference between spherical and circle?
A sphere is a three dimentional shape, a circle is a two dimentional shape. You can't pick up a circle, it can only be drawn.
In differential geometry, a one dimensional sphere is a point, a two dimensional sphere is a circle and a three dimensional sphere is what we call a "sphere", there is no limit to the number of dimensions a sphere can have.
I assume you're talking about a network.
On a token network, all of the computers wait to send data until they have the token. The token is a piece of data that travels around the network (picture all of the computers set up in a circle) giving each one a chance to send their data. After that computer has sent the data, the token moves on to the next.
It prevents data collision on the network.
What is the best topology for cyber cafe?
The trivial topology, since in the trivial topology everyone would be 'close' to everyone.
How do you rotate a figure 60 degrees clockwise about origin?
Suppose there is another x'y'-coordinate system that has the same origin as the xy-coordinate system, and θ is the angle from the positive x-axis to the positive x'-axis. If there is a point (x, y) in the xy-coordinate system, and a point (x', y') in the rotated x'y'- coordinate system, then
x = x' cos θ - y' sin θ and
y = x' sin θ + y' cos θ (rotation of axis formulas)
Since the rotation of 60 degrees clockwise, is the same as the rotation of 300 degrees anticlockwise,
then cos 300ᵒ = cos (-60ᵒ) = 1/2 and sin 300ᵒ = sin (-60ᵒ) = -√3/2 (only cosine is positive in the IV quadrant).
So we need to express x' and y' in terms of x and y.
x = x' cos θ - y' sin θ
x = (1/2)x' - (-√3/2)y' multiply by 2 each term to both sides
2x = x' + (√3)y' subtract (√3)y' to both sides
x' = 2x - (√3)y'
y = x' sin θ + y' cos θ
y = (-√3/2)x' + (1/2)y' multiply by 2 to both sides
2y = (-√3)x' + y' add (√3)x' to both sides
y' = (√3)x' + 2y
so that,
x' = 2x - (√3)y' replace y' by (√3)x' + 2y
x' = 2x - √3[(√3)x' + 2y]
x' = 2x - 3x' - 2√3y add 3x' to both sides
4x' = 2x - 2√3y divide by 4 to both sides
x' = (1/2)x - (√3/2)y
and
y' = (√3)x' + 2y replace x' by (1/2)x - (√3/2)y
y' = (√3)[(1/2)x - (√3/2)y] + 2y
y' = (√3/2)x - (3/2)y + 2y
y' = (√3/2)x + (1/2)y
Thus, the rotated point (if the angle of rotation about the origin is 60 degrees clockwise) is [(1/2)x - (√3/2)y, (√3/2)x + (1/2)y].
What are two prime numbers whose sum is 42?
Split the number in half and make an equation adding the two together to make the desired amount. Unless the number that is half the total is prime, adjust the first number down by an amount to make it a prime number, then adjust the second one up by an equal amount and check whether it is also a prime number. If the second number is also a prime number, you have found two prime numbers that equal the desired amount. If not, adjust the first number down to another prime number, repeating the procedure above until you have two prime numbers.
If you split 42 in half, the result is 21. Take the equation 21 + 21 = 42. Since 21 is not prime, adjust the first number down to 19 which is the first prime number below 21. That means the other number would be 23, which is prime. So, you have two prime numbers that add up to 42 = 19 + 23.
The prime factorization of 42 is 2 x 3 x 7, so it has three factors that are prime: 2, 3, and 7.
What logical contradiction does Defoe point out?
Men complain of women's foolishness, yet prevent their education.
51.66
Why is every singleton set in a discrete metric space open?
In a metric space, a set is open if for any element of the set we can find an open ball about it that is contained in the set. Well for the singletons in the discrete space, every other element is said to have a distance away of 1. So we can make a ball about the singleton of radius 1/2 ... this ball just equals that singleton since it contains only that element. So it is contained in the set. Thus the singleton set is open.
What is Free Edges in Hyper mesh?
while meshing the component, some unconnected elements will found, that is known as free edges.
An isometry that moves or maps every point of the plane the same distance and direction is a translation, which is one of 4 transformations that can be plotted on the Cartesian plane.
What is the differences between star topology and bus topology?
A star topology has a central hub with other devices each connected to the hub but not to each other - for one device to communicate to another, they have to use the hub.
With a bus topology all the devices are connected to the same bus - there is no hub. Each topology has advantages and disadvantages; the speed of a star network is limited by the hub; a telephone exchange is an example of a star network and there is a built-in limit to the number of devices that can be connected and there's no way to increase it other than to replace the hub with a bigger one. However, the devices (telephones in our example) can be dumb - all the intelligence is in the hub; it manages the calls and importantly, for commercial exchanges, calculates the bills. For bus networks, devices have to be smarter but can do much more as they can grab the whole bus.
What best describes a network's physical topology?
Physical layout of where the Hosts are located, Location of wires, etc...
It basically means the structure of your network.
An isometric triangle is a 3 dimensional triangle shown on a flat surface or in 2 dimensions.