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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
To enable aquatic mammals to communicate with each other?
Sorry. I couldn't resist playing on the typo, 'porposes'.
A local area network (lan) is used to connect two or more computers in close proximity to each other -- usually in the same building or campus -- so that they can share files, applications and resources such as printers, file servers and Internet connections. As opposed to a wide area network (wan) which connects computers over a broader geographical area.
Think of them intercom and long-distance telephone systems for computers
How is a modem facilitats communication different between computer?
a modem is a tool which can change analog sinal to digital signal and vice-versa. when the communication has to take place between the two computers then there is involvement of wires or some wireless technology. if communication exists between then it is through analog signals and computer can accept only digital signal. so,basically modem changes the analog signal to digital when the data is to be received at computer's end and hence it works and facilitates the commmunication between two or more computers.
Why is it necessary to install both the Deployment Server and Transport Server role services?
The Deployment Server is dependent on the core parts of the Transport Server.
What is a global network of linked computer networks?
The internet, it is one large network that uses diffrent connection mediums to connect all computers across the world. Wheter they are in their own private network or not.
Yes. I am doing exactly that, right now. That's nice, so how do you do it?
How can TCP handle urgent data?
When an interactive hits the DEL or CTRL-C key to break-off a remote computation that has already begun, the sending application puts some control information in the data stream and gives it to TCP along with the URGENT flag. This even causes TCP to stop accumulating data and transmit everything it has for that connection immediately.
The receiving application is interrupted so it can stop whatever it was doing so that it can read the data stream to find the urgent data.
In electrical engineering, impedance measures how easily a circuit conducts current when a voltage runs through it. Measured in ohms, impedance is a way of telling you how much of the voltage introduced at one end will really make it to the other end.
Cat6 is the current standard for new installations of ethernet cable. Depending on the space and certain building codes you need to decide between Plenum (CMP) or Riser (CMR). The difference being Riser cable is more durable, but puts out toxic fumes when caught on fire, so it is not suitable for spaces with open air flow. Dropped ceilings are generally considered Plenum spaces so therefore require plenum cable.
What are the differences between LAN MAN WAN?
LAN: (local area network) A group of computers that share a common connection and are usually in a small area or even in the same building. For example an office or home network. They are usually connected by Ethernet cables and have high speed connections. If it was a wireless setup it would be called a WLAN, which would have a lower connection speed.
MAN: (metropolitan area network) This is a larger network that connects computer users in a particular geographic area or region. For example a large university may have a network so large that it may be classified as a MAN. The MAN network usually exist to provide connectivity to local ISPs, cable tv, or large corporations. It is far larger than a LAN and smaller than a WAN. Also large cities like London and Sydney, Australia have metropolitan area networks.
WAN: (wide area network) This is the largest network and can interconnect networks throughout the worldand is not restricted to a geographical location. The Internet is an example of a worldwide public WAN. Most WANs exist to connect LANs that are not in the same geographical area. This technology is high speed and very expensive to setup.
I hope these definitions helped as I have tried to explain LAN, WAN, and MAN in non technical terms.
Notes:
Wireless LAN is WLAN. At the moment a wired connection is still always high speed. Even though having a Wireless LAN is less mess with no cables, it compromises on speed.
With new networks popping up all the time like 3G, GSM, and GPRS, the actual end user gets to connect directly to a WMAN which was unheard of. Most of these networks are mobile data standards that previously or still are used on cell phones
you welcome :-)
TCP-IP Protocol is how computers can connect to each other and the internet. The TCP (Transmission Control Protocol) is the the protocol which guarantees delivery of messages from the pc, and receives them too. The IP (Internet Protocol) is what the computers use as an addressing scheme (like a home address) its format is 4 series of numbers separated with dots, the numbers are between 0 and 255. eg, 192.168.2.1 - 192.168.2.255
Is a subnet mask the same as netmask?
YES!
netmask is just another way to say subnet mask. crazy but confusing.
Is email connection oriented or connectionless?
Email runs SMTP (simple mail transfer protocol), where SMTP operates over TCP protocol, so it id connection oriented.
Why do you need to log on to a computer network?
So the network can correctly identify you, personalize settings for you, and allow you connection to the network (or internet).
NAT - Usually you get one ip address per internet connection. Somewhere like a school, with 30 computers isn't going to buy 30 separate connections. So they use NAT. All the computer's have their own private ips and make use of the one external ip.
Subnetting - I wouldn't worry about this too much at the moment, not until you learn a bit more of the basics.
Ip addressing - This is just like a house address, except its a computer address. If you started a download... its sent to your ip address.
Pinging - this is just a simple tool, designed to tell you if you can reach a particular destination. Invaluable when troubleshooting network issues.
routers - Most home users just use routers for the wirless capabilities.... In advanced networks you can do alot more with them.
Default gateway - For alot of people, their router is their default gateway. Its pretty much where you send a packet to so that it can reach the internet.
AnswerNATing, subnetting, IP addressing, etc, those aren't included in the basics. Maybe someone else will explain this stuff, but I don't feel like typing a few hundred pages in this little text box. Pinging is simply a way to find out if another computer on the network is turned on and correctly connected to the network when you know the IP address of the other computer. You might find this site useful: http://computer.howstuffworks.comDoes IBM thinkpad r51 has sata hard disk?
No, it does not have SATA instead it has older standard ATA. They are not interchangeable.
What is the differce between subnet and wide area network?
Subnets are designed for local area networks (LANS) that are used in an organization or building.
Wide area networks cover larger areas and don't use subnets.
What is the advantage of using a layer 3 switches in the core of a campus network?
The advantage of using a layer 3 switch is the speed at which it can establish a network connection.
How can you tell if an IP address is a broadcast address if you write out the address in binary?
Who da f%*$ knows!
Describe the importances of computer networks in electronic communication?
The followings are the role computer networks in electronic communication.
- It facilitate trading of financial products outside of stock exchanges, The primary products that are traded on ECNs are stocks and currencies.
- ECNs increase competition among trading firms by lowering transaction costs, giving clients full access to their order books, and offering order matching outside of traditional exchange hours
- It's used in electronic messaging, messaging - the sending and processing of e-mail by computer
Formula of finding how many computers in a network?
on the server you could run netstat on the command line/insatall an app to ping all IP's on a node
A Terminal device is a computer connects directly to a network server and does not have an independent operating system. They are also sometimes referred to as dumb terminals as they would not be able to do anything unless connected to the main network.
Yes...depending on the type of topology.
