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Computer Networking
Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.
18,810 Questions
Why is balance an issue in UTP cables?
Why is balance an issue in UTP cables?Type your answer here...
Why is data broken up into packets before transmission?
To avoid the missing of data and also if we sent it as a whole it won't be easy to send and receive
What problems could be solved by using crossover cables?
To connect two devices of the same type together.
e.g. To connect a router to another router, a switch to another switch or a computer to another computer.
If you are connecting diferent devices together, such as a router to a switch, a straight through cable should be used.
What is the difference between osi and iso model?
ISO stands for International standards organization.It is an organization for agreement on international standards of network communication world wide.
On the other hand OSI is a model for understanding and designing a network architecture.
Which of the following functions are associated with the logical link control sublayer?
delimiter for data according to the physical signaling requirements of the medium
How do nodes connect to each other?
There are many networking protocol basics. Nodes are connected using these protocols.
You can enable MAC address (also know as Physical Address) filtering. MAC address filtering has two modes:
1. Allow access to listed MAC addresses
2. Deny access to listed MAC addresses.
What does the subnet mask of an IP address do?
Subnet Mask provides Network & Class Identificationfor an IP Address.
BRAP(broadcast recognition with alternation priorities) is a collision-free protocol that operates in the medium access control (MAC) layer of the OSI model.
A router passes traffic between networks to reach other computers or servers. A router also does NAT. Nat masquerades traffic behind the router with private IP(Non-internet route able) with the Public IP (Internet route able)
What are reasons for using a network?
Linear equations in two variables
A common form of a linear equation in the two variables xand y is
where m and b designate constants. The origin of the name "linear" comes from the fact that the set of solutions of such an equation forms a straight line in the plane. In this particular equation, the constant m determines the slope or gradient of that line, and the constant term b determines the point at which the line crosses the y-axis, otherwise known as the y-intercept.
Since terms of linear equations cannot contain products of distinct or equal variables, nor any power (other than 1) or other function of a variable, equations involving terms such as xy, x2, y1/3, and sin(x) are nonlinear.
Forms for 2D linear equationsLinear equations can be rewritten using the laws of elementary algebra into several different forms. These equations are often referred to as the "equations of the straight line." In what follows, x, y, t, and θ are variables; other letters represent constants (fixed numbers). General (or standard) formIn the general (or standard[1]) form the linear equation is written as:where A and B are not both equal to zero. The equation is usually written so that A ≥ 0, by convention. The graph of the equation is a straight line, and every straight line can be represented by an equation in the above form. If A is nonzero, then the x-intercept, that is, the x-coordinate of the point where the graph crosses the x-axis (where, y is zero), is C/A. If B is nonzero, then the y-intercept, that is the y-coordinate of the point where the graph crosses the y-axis (where x is zero), is C/B, and the slope of the line is −A/B. The general form is sometimes written as: where a and b are not both equal to zero. The two versions can be converted from one to the other by moving the constant term to the other side of the equal sign. Slope--intercept formwhere m is the slope of the line and b is the y-intercept, which is the y-coordinate of the location where line crosses the y axis. This can be seen by letting x = 0, which immediately gives y = b. It may be helpful to think about this in terms of y = b + mx; where the line passes through the point (0, b) and extends to the left and right at a slope of m. Vertical lines, having undefined slope, cannot be represented by this form. Point--slope formwhere m is the slope of the line and (x1,y1) is any point on the line.The point-slope form expresses the fact that the difference in the y coordinate between two points on a line (that is, y − y1) is proportional to the difference in the x coordinate (that is, x − x1). The proportionality constant is m (the slope of the line). Two-point formwhere (x1, y1) and (x2, y2) are two points on the line with x2 ≠ x1. This is equivalent to the point-slope form above, where the slope is explicitly given as (y2 − y1)/(x2 − x1).Multiplying both sides of this equation by (x2 − x1) yields a form of the line generally referred to as the symmetric form:
Intercept formwhere a and b must be nonzero. The graph of the equation has x-intercept a and y-intercept b. The intercept form is in standard form with A = 1/a and B = 1/b. Matrix formUsing the order of the standard form
one can rewrite the equation in matrix form:
Further, this representation extends to systems of linear equations.
becomes
Since this extends easily to higher dimensions, it is a common representation in linear algebra, and in computer programming. There are named methods for solving simultaneous linear equations like Gauss-Jordan which can be expressed as matrix elementary row operations.
Parametric formand Two simultaneous equations in terms of a variable parameter t, with slope m = V / T, x-intercept (VU−WT) / V and y-intercept (WT−VU) / T.This can also be related to the two-point form, where T = p−h, U = h, V = q−k, and W = k: and In this case t varies from 0 at point (h,k) to 1 at point (p,q), with values of t between 0 and 1 providing interpolation and other values of t providing extrapolation. Polar formwhere m is the slope of the line and b is the y-intercept. When θ = 0 the graph will be undefined. The equation can be rewritten to eliminate discontinuities: Normal formThe normal segment for a given line is defined to be the line segment drawn from the origin perpendicular to the line. This segment joins the origin with the closest point on the line to the origin. The normal form of the equation of a straight line is given by: where θ is the angle of inclination of the normal segment, and p is the length of the normal segment. The normal form can be derived from the general form by dividing all of the coefficients byThis form is also called the Hesse standard form,[citation needed] after the German mathematician Ludwig Otto Hesse.shawal is the bestA rule of thumb, suggested in the Cisco Networking Academy, is to use a centralized server once you have 10 or more computers.
The idea is that with a larger network you need more reliability, centralized administration, as well as certain more advanced technology.
A rule of thumb, suggested in the Cisco Networking Academy, is to use a centralized server once you have 10 or more computers.
The idea is that with a larger network you need more reliability, centralized administration, as well as certain more advanced technology.
A rule of thumb, suggested in the Cisco Networking Academy, is to use a centralized server once you have 10 or more computers.
The idea is that with a larger network you need more reliability, centralized administration, as well as certain more advanced technology.
A rule of thumb, suggested in the Cisco Networking Academy, is to use a centralized server once you have 10 or more computers.
The idea is that with a larger network you need more reliability, centralized administration, as well as certain more advanced technology.
How do the layers of the internet model correlate to the l layers of OSI model?
The OSI model is a standard developed by ISO for designing of computer networks.
OSI stands for Open Systems Interconnection and was created by ISO, the International Standards Organization.
The OSI "reference model" divides particular networked processes into seven different layers:
Application (Layer 7)
Presentation (Layer 6)
Session (Layer 5)
Transport (Layer 4)
Network (Layer 3)
Data-Link (Layer 2) and
Physical (Layer 1)
There are at least 2 ways (mnemonics) to help you remember the layers:
1. Please Do Not Throw Sausage Pizza Away.
2. All People Seem To Need Data Processing.
OSI stands for Open System Interconnection model
Which OSI layer is responsible for adding a header that includes routing information?
The routing process occurs in the 3rd OSI layer (network layer)
routing protocols use network address (IP address in TCP/IP) to chose the correct path to the destination.
ps: You can also have routing protocols on other layers sometimes (application layer in p2p routing) but this is something completely different.
How does a virtual server work?
virtual servers are a method of server hosting that uses virtual machines. They are meant only for use by the individual person or service and it is dedicated to meeting customers needs
A virtual server works by having another virtual computer on your machine. It can have its own address and run its own programs solely in it own little area.
Is there any computer online using the router.
If not then you will need to connect the computer to the router.
If yes then you can open the router set up page on that computer.
router set up page is the page where you can check all the router settings.
Try this web site: fixhomenetwork.com
Email components used to forward mail between servers?
MTA (Mail Transfer Agent) and SMTP (Simple Mail Transfer Protocol).
What is the attenuation level of a twisted pair cable?
Attenuation occurs in all copper cable regardless of whether it is twisted or not. This is because the copper atoms actually 'resist" the electrical voltage being applied (a physics principle).
A UDP header contains what fields?
A UDPheader contains four 16-bit fields. They are the source port, destination port, length, and checksum -- in that order.
What are the difference between telex and fax?
The fax machine is used to relay information that is usually documented from one place to another. A telephone is used to relay audio information from one place to another.
