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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

What are the benefits of Novell Netware?

It provides a wide range of built-in services, including directory services, security, routing, messaging, management, file and print services, TCP/IP support, and SMP (symmetric multiprocessing).

What is a global network of computers linked each other?

It's called the Internet, and no I'm not being sarcastic - that quite literally "is" the definition of the Internet:

a worldwide network of smaller computer networks that use the TCP/IP network protocols to facilitate data transmission and exchange among the global community.

Is a Fax number the same as telephone number?

Yes, it is. On the receiving end (the number you call) a fax machine is set up as the recipient of your call. The phone line can still be used as a voice call, just not both at the same time. See the related link for more information on how a fax machine works.

What is the difference between ipx spx and tcp ip?

It's very detailed. TCP and IPX are protocals that sort your data into a certain pattern so that you can transmit it over your line (phone, cable, ethernet, etc). The receiver than recongnized this specific pattern and can re-assemble the data back into it's original format. TCP and IPX are just types of patterns that are used to send data. TCP is used for your internet connection and your LAN. IPX is an older protocol that is dying out. It is still used in some video game interfaces. There is much more detail in the the exact way they organize data. I'm sure there are reports on this subject you can find on Google.

How many DNS root server in the world?

there are many hundreds of root DNS servers around the world . And there are 13 organisation responsible for the management of these servers . In India , there are three root servers located in Mumbai , Delhi and Chennai .

References : -

http://www.iana.org/domains/root/servers

http://www.apnic.net/community/support/root-servers

http://blog.icann.org/2007/11/there-are-not-13-root-servers/

What is a domain controller?

Domain Controller it is Microsoft Windows Server 2000/2003 directory server that provides access controls over users, accounts, groups, computers and other network resources.

Domain Controller authenticate users and maintains directory services and the security database for a domain.

What is a primary function of the trailer information added by the data link layer encapsulation?

to represent the frames sequence number

I believe this is wrong in the 5th edition....Network+ Guide to Networks on page57 it states that protocols in the data link layer add a header to the front of each packet and a trailer to the end of each packet to make frames. (The trailer indicates where a frame ends.)

paragraph 4

What are the main advantages of a Web Server Application?

A web server can actually mean one of two different things, either the actual computer hardware, or the software that runs on the web server, receiving requests from clients and responding to them. At first glance, the specifications of a web server may be very similar to the type of computer used as a desktop machine by many people, and in fact most desktop machines could be used as a server, given the right software. Like desktop machines, a server will have a CPU, RAM, a hard drive and an Internet connection. However, when you look more closely at these specifications, the differences become apparent. The speed of the CPU is less important in a server, as servers do not have high-end graphics requirements. Nowadays, it is becoming common to see two or more CPUs, rather than one faster CPU. Memory sizes tend to be similar to those of desktop machines, depending on the purpose for which the server is intended. Most servers will have more than one hard drive, which allows for a RAID set-up to be used for data integrity, and the hard drives will also tend to be larger than those used in a typical desktop machine. Servers may also have more than one power supply. Bear in mind that all of these components will normally be built to a higher standard, as reliability is important.

How do you find the wireless network password?

First, what operating system are you running on the computers that are connected. This will determine whether we can do this easily through the windows GUI, or if we'll have to get it through less palatable means.

What Type of cable to connect PC to PC?

You need what is called a crossover cable. This cable is special because there are a few wires switched that allow the computer to send and receive all has to do with the network card and how communcation is done.

Answer:

Correct - The wires within each terminal end of the cables are switched So the Transmit pin connection on one end of the cable is the Receive pin on the other. It's where the term crossover came from. Typically crossover cables are yellow, and can usually be bought at any computer store.

What is a Ethernet cable?

Ethernet is a physical and data link layer technology for local area networks (LANs). Ethernet was invented by engineer Robert Metcalfe.

When first widely deployed in the 1980s, Ethernet supported a maximum theoretical data rate of 10 megabits per second.

What are the main features of ADhoc network?

The main feature of an ad-hoc network is that there are temporary and do not require any cabling. The only connections required are the wireless connections in the devices. As a result there is very little setup to worry about.

What types of data can be transmitted over a network?

Basically, any type of data. Data stored in computers is stored as 1's and 0's; such data ("digital data") can be encoded in such a way that it represent a wide variety of types of data, such as documents, images, sounds, videos, computer programs, and probably several other types of information. Any such data can be transmitted over a network. However, the network may impose a limit on how fast such data can be transmitted - or more accurately, with what bandwidth (measured in bits per second or some multiple, for example, Mbps). This may make it impractical, for example, to transmit high-quality movies over certain slower networks.

What is a chain communication network?

A daisy chain network is a way to describe a network topology whereby one computer is connected directly to a second, which in turn is connected to a third, which in turn is connected to a fourth, etc. Thinnet and phonenet are examples of this type of technology.

These days, it is extremely uncommon to come across such a network. Chain networks allow people to look at the big picture; giving them a better understanding of the flow of materials and information.

What are the disadvantages of unshielded twisted pair?

Advantages of Unshielded Twisted Pair (UTP) over STP (Shielded) is that it's cheaper.

Advantages over CAT3 which is untwisted is that the cable runs can be longer.

The twists help to cut down on crosstalk.

Can you use a fake name when creating an email?

If you want your actual friends to friend you, it would be silly not to. Or you can put like a nick name or something, but if what you mean is, are you allowed to pretend you are a celebrity? Absolutely not. But what you CAN do is you can put your last name as a celebrity's last name, as a joke that you are married to them. Such as, Karen Bieber. But if you wanted to do that I would put your last name before 'Bieber' or whatever your fake last name may be, that way people can search you and also you can pretend it is your 'maiden' name. Another example would be Karen Smith Bieber.

What is the role of a workstation computer?

In the days of main frame computers, work stations were keyboards and printers, or monitors, which were linked to the Central Processing Unit, which performed all the functions. In other words, when a person typed, each character was sent to the CPU. When smaller computers became available, workstations were given limited storage capacity, so that characters are stored in a memory inside the workstation until the CPU polls the work station to dump its data into a buffer, or holding area, in the CPU. These work stations resembled stand-alone computers, but did not have the ability to run programs. Work stations have disappeared, for the most part, as stand-alone computers have become much less expensive.

Some applications still have the term 'work station', where there is a central computer, called a server, which handles storing and retrieving data, for the stand-alone computers which are linked to it, thus reducing the amount of data stored on each computer. However, desk top computers have become so powerful that it is rare to have a central computer do the processing, with only input and output occurring at the work station.

Protocol is responsible for the logical addressing of each packet created by the transport layer?

That's IP (Internet Protocol), or any other similar layer-3 protocol.

That's IP (Internet Protocol), or any other similar layer-3 protocol.

That's IP (Internet Protocol), or any other similar layer-3 protocol.

That's IP (Internet Protocol), or any other similar layer-3 protocol.

What is connecting to a network?

Network Topology decides how Devices on a Network will be interconnected. General used Topologies are BUS, RING & STAR Topologies.