Computer Networking

A network card is used for this purpose. Many times, you will see the abbreviation NIC used. NIC stands for Network Interface Card. There are many types of NICs that have been used in the past. For all intents and purposes, the only NIC type in use today is Ethernet cards.

The most common hybrid system is based on the Diffie-Hellman key exchange, which is a method for exchanging private keys using public key encryption. Diffie-Hellman key exchange uses asymmetric encryption to exchange session keys. These are limited-use symmetric keys for temporary communications; they allow two entities to conduct quick, efficient, secure communications based on symmetric encryption, which is more efficient than asymmetric encryption for sending messages. Diffie_Hellman provides the foundation for subsequent developments in public key encryption. It protects data from exposure to third parties, which is sometimes a problem when keys are exchanged out-of-land.

An RJ45 connector has 8 conductors. it has the naming convention of 8P8C (8positions 8conductors).

ou can run the ping command on a Windows

computer by opening an MSDOS window and

then typing "ping" followed by the domain name

or IP address of the computer you wish to pin

A domain local group . By default, this group has no members. Computers that are running the Routing and Remote Access service are added to the group automatically. Members of this group have access to certain properties of User objects, such as Read Account Restrictions, Read Logon Information, and Read Remote Access Information.

Regarsd,

Rizwan Ranjha

Network Engineer

255

Types of WAN

Leased Line: It is the most expensive of all types and also the most secure. It uses a point to point connection from the WAN hub to the specific LAN point. This option is used by most big software corporations as not only does it offer superior security features but also higher data transfer rate. It uses the PPP(Point to point protocol), the HNAS, the HDLC or SDLC protocol. They are all specialized protocol mechanisms designed for security and error-free operation.

Circuit Switching: These are relatively cheaper connections and rely on making a physical circuit path between two points. The dial up connections are examples of such type. They use the landline telephone infrastructure for data transmission. The speed offered is usually 30 Kbps to 150 Kbps. The protocols used are PPP or ISDN.

Packet Switching: They use dynamic circuit paths with single point to multiple point linking. The data is sliced into variable sized packets irrespective of its type. Varying types of data use the same media link and therefore there is congestion and queuing delays in delivery. It uses the X.25 Frame relay protocol which is one of the first protocols ever developed.

Cell Relay: This is quite similar in structure to packet switching type but divides data into equally sized packets or cells. It is supposed to be very efficient for synchronous voice and video transmission and gives amazing clarity. It uses the ATM (Asynchronous Transfer mode) protocol.

Wireless WAN

WAN technology has also taken the step to the next level of network integration which is based on the mobile phone platform. It provides Internet connectivity through the wireless telecommunication mode and is called Wireless Wide Area Network (WWAN). It is a part of the third generation (3G) mobile technologies that are being offered. It takes advantage of the advances in mobile technology and the development of mobile infrastructure to deliver high quality and high speed Internet access. The routing mechanisms and protocols for this new technology are different.

Thus, WAN has taken communication to a new level and opened up a torrent of information and possibilities placing immense power at our hands. Today, thanks to this technology, you can stay in touch with anybody across the world. It has brought the world to your fingertips. One who can learn to wield this new technology and harness its powers, has only the sky as the limit!
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Dude....that's communication switching technique and NOTtypes of wan.The question was "What are the types of WAN connections?" and not 'communication'...
Types of WAN Connections are:


PSTN : Public Switch Telephone Network features are a) Low Speed b) Restricted bandwidth allocation c) Analog Nature of Transmission d) widespread availability.
Basically designed for Telephone but can be use for data communication with the help of the MODEM.The cost of setting up this type of WAN is high usually coz connection lasts for a considerable time,but can be obtained at a short notice.Used for FAX machines.


PSDN : Public Switch Data Networks and the feature are a) High Reliability b) High Quality of connection C) Provide high and low speed at appropriate costs.
It is used for network connection provided for connecting computer of one organisation to other organisations.


Value Added Service : This is used when a provider processes,stores and manipulates the data that is to be carried on to the network this is called adding value to the data.Companies in the same lines use this type of WAN.In India Videsh Sanchar Nigam Ltd. is one such organisation using this type of WAN.


Integrated Services Digital Network : These are basically used for Digital Transmission for the integration of Voice,Video and Data transmission with the Help of Switching and message technique.(Message technique does not require a dedicated path (Like in Circuit Technique) between the sender and receiver,the Destination address is appended to the data which passing from one node to the other in a network reaches the Destination.) This is used by the telephone network [they were dreaming for a very long time and I suppose their dreams have come true].
Like the idea of connecting Telephone line to a Digital Media (PC) for the network access?


Private Networks : This,as the name suggests,are used by the private (basically Leased) network owners, as a link to be served by the network.They can use it for High-Speed Data Transfer or for Large quantity of Data transfer.


N ya one more thing both Message switching's and Circuit Switching's advantages are inherited by Packet Switching...

flow control is the technique for assuring that a transmitting entity does not overwhelm a receiving entity with data. The receiving entity typically allocates a data buffer of some maximum length for a transfer. When data are received, the receiver must do the certain number of processing before passing the data to higher level software. In the absence of flow control, the receiver's buffer may fill up and over flow while it is processing old data.

The Internet is a global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions. Unlike online services, which are centrally controlled, the Internet is decentralized by design. Each Internet computer, called a host, is independent. Its operators can choose which Internet services to use and which local services to make available to the global Internet community. Remarkably, this anarchy by design works exceedingly well. There are a variety of ways to access the Internet. Most online services, such as America Online, offer access to some Internet services. It is also possible to gain access through a commercial Internet Service Provider (ISP).

It must be understood that the Internet is not synonymous with World Wide Web. Web is a way of accessing information over the medium of the Internet. It is an information-sharing model that is built on top of the Internet. The Web uses the HTTP protocol, only one of the languages spoken over the Internet, to transmit data. The Web is just one of the ways that information can be disseminated over the Internet. The Internet, not the Web, is also used for e-mail, which relies on SMTP, Usenet news groups, instant messaging and FTP. So, the Web is just a portion of the Internet, albeit a large portion, but the two terms are not synonymous and should not be confused.

Mobile phones, data cards, and cellular routers allow users to connect to the Internet from anywhere there is a cellular network supporting that device's technology.

You'll probably need to plug the cable modem to the cable line. Then plug an ethernet cable from the modem to the WAN port on the router. Then connect each of your computers (via ethernet cable) to the router.

All network devices have some component that operates at layer 1. Only hubs and repeaters operate entirely at layer 1.

A wood router is a high speed tool used to hollow out an area in the face of a hardened piece of wood. One typical use for such a device would be cabinetry.

IPv6 address has 2^128 address and IPv6 address is of 16 bytes and is represented in colon hex notation.

Just a little caveat here, what Archangel dmitry lists here is true but should be regarded as only historical information since classed IP address assignment has not been used in over 20 years. It was replaced in 1993 by Classless Inter-Domain Routing. This was put in place to help deal with the quick depletion of available public IP addresses. In the modern day, IP addresses are assigned as needed rather than as blocks as was done when classed addressing was used.

Right Click on "My Network Places" then click on "Exploler'" then go Entire "Network"then click on "Microsoft Windows Network" .. here u can see 2nd laptop, then you may need user login id & password of that laptop...... after entering usrID & password you can see shared folders.... Enjoy your life "Ajay Gaite" For further querry contact me "ajayg[at]softhome.net

a network administrator administrates network to you

Use a CAT-5, also known as an Ethernet cable.

Fiber optics carry vastly more information than ordinary cables, for a given thickness of cable.

none no1 lks u

14.14.3.5

217.158.140.53

192.123.4.28

10.134.23.4

There are mainly three advantages:

1] less cost

2]data transfer rate is 100 mbps

3]it can support more length.

Routers, Access Points, Printers... Every device you will need to access sooner or later...computer can stay with Dynamic IP's since they should show their name in network, but routers, access points, printers, while they may show its not guaranteed.

Plenum rated cabling is required when used in an open ceiling return air environment. That is when the return air for the hvac units use the space between the ceiling of the first floor and the floor of the second floor as a return air plenum. The way to tell is if the return air vent has a duct attached to it. The duct will run to the air conditioning air handler. This condition IS NOT a plenum rated ceiling. However, if the return air vent does not have a duct, that means the air conditioning air handler is using the air space between floors as a plenum. This condition requires the use of plenum rated cabling. If plenum rated cable is exposed to flame, it does not give off toxic gases as it melts.

An APIPA stands for, Automatic Private IP Address. Basically the majority of people use DHCP to obtain there IP address and configurations. For this to work, a DHCP server must be running. DHCP servers are found in home routers, gateways, modems, or corporate servers. However, If there is no DHCP server that is reachable, you will get an APIPA. APIPA is a range of IP address just for Microsoft operating systems. An APIPA ranges from 169.254.0.1 through 169.254.255.254. When it is activated, it constantly looks for a DHCP server to get a configuration from. When it finds a proper configuration, APIPA is disabled.