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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
How do you find another computer name from cmd?
You can't find another computer name but you can find other users on the same computer. I am not sure but i think cmd is only a client based program not a server based.
Yes. Gallium is used as a "dopant", a calculated impurity that turns the silicon that makes up the computer chip from a nonconductor to a semiconductor.
I am connected to a wireless network but i can't go on the internet I have windows xp what do i do?
Make sure that your wireless network is connected to Internet. Otherwise, Windows and your wireless connection software will have troubleshooting tips for you to follow.
What is Important of Simple Mail Transfer Protocol?
IMPORTANCE OF SMTP is transmission of emails across the internet.
Why does each connection between routers count as a separate subnet if there are no hosts connected?
That is the way networks are set up. The whole idea of using a router is to separate and connect different networks or subnets.
Note that a "host" is any point that has an IP address; so the router interface (or port) is also a host.
What is the need of active webpages?
because of the context of the browser's request, browser chooses to interpret that documents actions- rather than HTML for display or like other content type.
What is real time communication server?
Real-time communication servers, formerly known as chat servers or IRC Servers, and still sometimes referred to as instant messaging (IM) servers, enable large numbers users to exchange information near instantaneously.
Why twisted pair of wires is used in instrumentation?
Because, from total 8 wires 4 wires are used for actual data transmission ( i e for bit transmission ) and remaining four wires are wounded to these wires to avoid crosstalk and radio frequency interference (RFI).
FTP or File Server in Local Area Network. FTP or Mail Server for delivering data through Internet.
Why use a clock rate of 64000 for serial interfaces?
When two routers are connected to communicate using a serial cable connection, one end of the router will be using DTE (Data Terminal Equipment) and the other end uses DCE (Data Communication Equipment). In order to communicate effectively with out any delay or to have the same band width, we use 64000 clock rate.
This answer is given with the knowledge what I have, please update me if I am wrong.
Thank you
Syed
Device for connecting two or more computers by phone?
That would be called a Modem.
A Modem is an acronym for MOdulator, DEModulator.
There are two technologies used for computer modems; tone shift and phase shift. Tone shift takes the ones and zeroes and turns them into tones, and support speeds up to 9600 baud (9600 bits per second, roughly). Phase shift takes the ones and zeroes and turns them into phased tones, and supports speeds of up to 56KBaud (56 thousand bits per second).
Why wont my digital id match up with my i.p address to allow me to load .exe?
The I.P. address is your address on the Internet (or in a separate network). When you download anything, or communicate in some other way on the Internet, your I.P. address is used to send the information to your computer.
You can work out calculations much faster on a spreadsheet and you can use formulas to work out your answers properly instead of doing it in your head or on pen and paper which is easier.
Leslie Lamport proposed this scheme to provide ordering of events in a distributed environment using logical clocks. Because it is impossible to have perfectly synchronized clocks and global time in a distributed system, it is often necessary to use logical clocks instead. Definitions:
Happened Before Relation (->). This relation captures causal dependencies between events, that is, whether or not events have a cause and effect relation. This relation (->) is defined as follows: * a -> b, if a and b are in the same process and a occurred before b. * a -> b, if a is the event of sending a message and b is the receipt of that message by another process. * If a -> b and b -> c, then a -> c - that is, the relation has the property of transitivity. Causally Related Events: If event a -> event b, then a causally affects b. Concurrent Events: Two distinct events a and b are concurrent (a b) if (not) a -> b and (not) b -> a. That is, the events have no causal relationship. This is equivalent to b a. For any two events a and b in a system, only one of the following is true: a -> b, b -> a, or a b. Lamport introduced a system of logical clocks in order to make the -> relation possible. It works like this: Each process Pi in the system has its own clock Ci. Ci can be looked at as a function that assigns a number, Ci(a) to an event a. This is the timestamp of the event a in process Pi. These numbers are not in any way related to physical time -- that is why they are called logical clocks. These are generally implemented using counters, which increase each time an event occurs. Generally, an event's timestamp is the value of the clock at that time it occurs. Conditions Satisfied by the Logical Clock system:
For any events a and b, if a -> b, then C(a) < C(b). This is true if two conditions are met: * If a occurs before b, then Ci(a) < Ci(b). * If a is a message sent from Pi and b is the recept of that same message in Pj, then Ci(a) < Cj(b). Implementation Rules Required
* Clock Ci is incremented for each event: Ci := Ci + d (d > 0) * if a is the event of sending a message from one process to another, then the receiver sets its clock to the max of its current clock and the sender's clock - that is, Cj := max(Cj, tm + d) (d > 0) .
Since the basic PSTN (plain old telephone network) network link supports 64 Kbps bandwidth, I would say that is your answer.
How can you connect a router and 2 switch hub in a network?
You need to use "crossover" cable. Search on google and you can find the schematics.
Router <==> Switch ===Regular Cat 5 Switch <==> Switch Crossover cable
Crossover PIN layout of RJ-45 1 Rx+ 3 Tx+ 2 Rc- 6 Tx- 3 Tx+ 1 Rc+ 6 Tx- 2 Rc-
Argumentable:(
B standard (Most comercially bought cables) :
White Orange, Orange, White Green, Blue, White Blue, Green, White Brown, Brown.
Cross over cables are used primarily between to system NIC (Network Interface Card), not network devices.
**Correction**
Cross over cables are used to connect 2 like network devices. ie a switch to a switch, a router to a router , or a computer to a computer. There is one note though, some switches have the ability to detect if it is connected to another switch and will automatically "crossover" the cable for you.
Router--switch--switch--router are all wired with normal patch cables regardless of using a WAN or LAN port.
What is the capacity difference between a 600 pair telephone cable and a 144 pair OC-12 cable?
This answer can go in many differnet DIrections.
600 Pair Telephone Cable is equivelant to:
600 POTS ( Plane Old Telephone Service)
300 T1's (T1 = 1.5 MBPS or 23 PRI trunks or (6900 channels)
OC 12 is delivered on 1 pair of Single Mode Fiber generally SC Connectors.
OC12 = 622 Mbps
OC12 = 12 DS3
OC12 = 336 T1's or PRI circuits, or 7,728 Voice Channels)
How do you Convert binary number 110110 to decimal?
Each digit from the right denotes a power of 2, beginning with 20. So, the number indicated, 110110, is 25 + 24 + 22 + 21, or 54. This is just like our normal base 10 system, where the first digit is 100, then the "tens" digit is 101, and etc.
What type of information is in an Ethernet frame trailer?
The information found in the Ethernet frame trailer would be the error checking code.
Do you have to have the linksys rangeplus adapter to run the linksys Rangeplus n wireless router?
Short Answer: No.
Long Answer: No. Most wireless networking devices use the 802.11g (although more and more n) protocol. So, any device supporting this will be able to connect to your router.
What are the top four network hardware companies in the world?
Cisco, Brocade(Foundry) and Juniper definitely are the top 3 vendors used in ISP and Telco networks.
The last spot is harder to pin down and could be contested by Extreme Networks, HP with their Procurve brand, 3com, Huawei. Perhaps even Alcatel, Force 10, Tellabs, etc.
