Local Area Network

You don't unless you plan on networking or plan on using DSL to it's utmost. You can use DSL through the USB port but Ethernet, (network card) is more stable and slightly faster. The network card allows two or more computers to communicate with each other. Without it you cannot network.

A firewire or corssover cable can be used to connect any two computers that have these ports. However, a telephone modem can only be used to connect a computer to the internet.

The subnet mask must be the same for all devices in the same LAN segment. The IP addresses must be unique (different). Also, the default gateway address is usually the same for all devices in the same LAN segment.

A LAN has a limited length for distance, and for the number of clients that may be connected to it. If you exceed either, then you may need a longer connection distance, which is afforded by a WAN.

STP - Shielded Twisted Pair is twisted to reduces crosstalk. Crosstalk is when the signal crosses wire and reduces the communication quality. Twisting the pairs reduces the signal transmission to other wires in the cable "pack". Twisting them increases the length the cable can be run. Category 5 has a usable length of 100m, 330ft.

LAN is a collection of computers with in certain distance say, a building or premises or within a city. A LAN can be a collection of wired computers or wireless computers or mixed. A wireless connection is a connection which uses radio frequencies to send and receive data, e.g. a mobile phone is an application based on wireless connection.

I believe it has the benefit of avoiding "cross talk" from the wires near each other, the twisted pair makes it less likely.

I think it also has the benefit of having two wires on one connection for more potential through-put?

National Informatics Center

More Details on webpage: http://indiaimage.nic.in/

In a star topology, each device connects to a central network connectivity device such as a hub, switch, or router. These devices would be connected as a "star" (points on a star).

The other characteristic of a star topology is that a failing connection will only affect the failed device unless that device is the connectivity device. This means that in most cases a failing device on a star will not take down the entire network.

Another characteristic of a star is that they are easily expandable and scalable.

Pakichan

As far as i know its port number 80 being used by all the HTTP sites including youtube.

The top most layer is the application layer and bottom most layer is the physical layer. Since data is transferred from top to bottom, I would say that the starting layer is the application layer.

255.255.255.0

That would be a class E network, E networks do not have defines subnet masks or networks. Just a range (240.0.0.0 - 255.255.255.255).

In very simple words, A leased line is a rent paying line; as the name suggests.

As it is very difficult to connect two different point in far flange areas, a customer uses a line that is provided by some network provider and pays accordingly.You can take it as connecting some of your database in two different cities.

Hope, you understand me :)

LAN stands for Local Area Network. It like an office with all the computers hooked so they can share data and send emails just inside the office or building. A WAN stands for Wide Area Network and it connects two or more LANs...the Internet is a good of example of a WAN...the internet consists of a network connected to other networks..hope this helps.

A repeater. Repeaters work only on layer 1 (Physical) of the OSI model.

If you look at redundant networks in nature, like the network of the veins within a leaf you may realize that redundancy creates resilience.

Often leaves are subjected to parasites or physical damage. If a vital vein is struck in a network without redundancy it would mean all tissues or nodes which it previously fed into would be effectively annihilated from the network (death). A redundant network overcomes this problem by spreading out the risk.

From a Computational standpoint this would be the same problem. Often critical layers of a network if left without connectivity would create critical failures for parts of the network which may be dependent on its activity. Such is the nature of hierarchy.

False - a peer-to-peer network is simpler.

A packet capture (or sniffer) program sees packets coming into and out of the NIC (network interface card). It saves it for later analysis and use. These capture programs can be used to analyze traffic, look for problems, or be used for looking at data coming across the network.

1 Gbps

That depends on what you will be using the cable for.

In general, the higher the frequency of the signal being sent down the cable, the shorter the cable has to be.

The environment of the cable is also important. If the cable is in an electrically noisy environment, it needs to be shorter.

There are various standards that specify the maximum length of a cable. Sometimes it will work (some of the time) if you use a longer piece of cable, but following the standard is much more likely to work correctly all the time.

Some examples from computer networking standars:

For 10BASE-T Ethernet, the maximum length of a cable is 100 meters. Note that this standard was defined for Cat 3 cable, so you'll probably be able to use Cat 5e cable to send the signal further. However, there's no standard specifying how much further - you'll probably have to test it yourself.

For 100BASE-T Ethernet, the maximum length is also 100 meters, but the cable grade is specified as Cat 5 (not Cat 5e). So you might be able to make a longer run work with Cat 5e.

For 1000BASE-T Ethernet, again the maximum length is 100 meters, but now the cable must be Cat 5e. Also, all four pairs of the cable are used, whereas in the other two standards only two pairs are used.

HTH,

Gdunge

You should be able to do that, but some minor tweaking of setting might be required.

Go to the Wiki for OSI model -that discussion and listing is very good.