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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

Why interested in computers?

Many people (like myself) find computers interesting because of their versatility:

You can run web pages, games, worksheets, spreadsheets, e-mail, programming studios, calendars, etc. all from the same computer.

Different types of people can have one or more specific interests in computers:

* Gamers might have an interest in computers because there is a large variety of electronic computer games available for Linux, Windows, and Macintosh Comptuers. * Programmers might have an interest in computers because they can develop useful programs and applications to make life for themselves (and others) easier. * Economists might have an interest in computers because computers can track and store information regarding money, and computers can process numbers very well. Many such people keep track of their income/expenses on a computer * Connectivistsmight have an interest in computers because of the Internet. Computers use the Internet for e-mail, instant messaging, posting answers on WikiAnswers, even making phone calls. * Entertainists might have an interest in computers because of storage. Computers can store and recall many types of multimedia including pictures, music, and video

What is Novell?

Simply a novel can be defined as it is a long narrative piece of literature or long narrative writing but in prose form

How many addresses are there in Sydney?

there could be a million maybye even more you could probably check the phone book

What is the best way to set a humidifier?

Turn it on high when you leave the house so you don't have to hear how loud it is!

How do you get around Internet rimon. its a new Internet filter that run through a modem and not through the computer and it keeps learning what sites to block?

It's blocked at the provider level, by the ISP, not by the modem itself.

When you go to a blocked site, it asks for a username and password.

These are the same as the PPPoE username and password, that you have to type into the router or network configuration, in order to get internet in the first place.

For example, if you have a Linksys router set to 192.168.1.1:

Set your browser to 192.168.1.1

There, at the Setup page (the first page that comes up), you'll see a drop-down box with PPPoE chosen. Below that, you'll see username and password. Whatever you typed there, is the same as you want to type to get past the filtering.

However, in the PPPoE blank in the router, the username will also include "@XXX"; for getting past the block, omit everything after the "@". For example, in my router, the username is "tehilaeli@Ineto"; to get past the filter, I just type "tehilaeli", minus the "@Ineto".

However, some sites don't give you the option to enter the password; they're completely blocked, period, and even the subscriber whose name is on the Rimon phone bill couldn't get past it, even if (s)he wanted to. This of course makes sense to the subscriber as he is paying to have stuff reliably filtered out and he is not of a mind to have his kids spending their gray cells getting around it.

_________

It's called Server Based Filtering, It's the same as KosherNet.com offers in the US.

Server based filtering is when the filter is located at the ISP's end and the consumer has no access to any connection other then filtered.

How do you add com2 to the connection ports?

If your system only has one COM: port, you will have to physically add in a card or USB-RS232 serial adapter, and follow the installation instructions.

If your system has 2 COM: ports, make sure that in the CMOS (BIOS) settings, that the port isn't disabled or assigned as an InfraRed port.

Also, make sure that you physically have the connectors at the back of the unit available. Many motherboards offer COM2: only as an option, and it requires an optional (not included) cable that hooks to the motherboard.

What is NTLM?

NTLM, a Windows network authentication protocol, is a challenge/response system that allows a client to prove its identity without sending a password to the server. The Windows domain controller challenges the client to perform a complex mathematical calculation on the user's domain password and send this encrypted password to the domain controller. The domain controller then uses the same calculation to decrypt the password. If the decoded password matches the password obtained from the Security Account Manager (SAM) database, then the client is authenticated and may log into the network and access network resources.

NTLM is an abbreviation for Windows NT LAN Manager; it offers improved security over the now-obsolete LAN Manager protocol. The Indiana University network is configured to use only the latest version of this protocol: NTLMv2. This version provides increased security over NTLMv1.

A Real Time Communication (RTC) application may specify RTCAU_NTLM in the tag to indicate the client will accept NTLM authentication challenges.

Some of the information above comes from the Microsoft Development Network library.(Link)

What is Computer network Polling?

Computer network Polling is where a client server or Network Hub polls each computer for data. Data can only be sent when the particular computer is polled. If the computer has data to send but is not polled at that time, the data has to be stored until it can be sent. ^_^ JunkCollector ^_^

How can you send a message to other computer in the network through LAN?

use netsend Answer by BellySnow Method 1 You can use the Net Send command which is a messaging service provided by Microsoft allows users to sends messages to other users, computers, or messaging names on the network. Messenger Service should be started on user's computer. The syntax of the Net Send command net send {name | * | /domain[:name] | /users} message Method 2Use third party LAN messenger. Since the net send command line may not efficient and convenient for daily office communication. Using a specified LAN messenger to transfer message is more popular today. The link below is a webpage list the advantages and disadvantages of net send command line and LAN messenger.

When will be collision takes place in Network Switch?

Collision hardly takes place in todays intelligent switches. According to my knowledge all swicthes in todays era are working on CSMA-CD i.e. Carrier Sense multiple access - collision detection. Every station in a network sense the carrier so the switch before maintaining any communication.

How traceroute works?

The "traceroute" program uses ICMP messaging and the time to live (TTL) field in the IP header. It works by sending a packet to the intended host with a TTL value of 1. The first router will send back the ICMP "time exceeded" message to the sending host. Then the traceroute program will send a message with a TTL of 2, then 3, etc. This way it will get information about each router using the information received in the ICMP packets. To get information about the receiving host, the message is sent to a port that is not likely to be serviced by that host. A ICMP "port unreachable" error message is generated and sent back.

What are the different types of NAT?

In General There are two types of NAT 1)- Static NAT where a set of Private IP Ads are maped directly to a Set of Public Address 2)- dynamic NAT where a set of Private IP Addresses are maped to a pool of Public addresses as required In the above General Categories you can also configure how NAT should Work. However, most systems actually use PAT (Port Address Translation) instead of NAT Regards Shahryar Shaheen

How can you add second printer to one computer?

you just install the new printer the same way you installed the first one using its CD acomanied . This can be done with as much printers as you need. when you want to use specific printer , you must set it as a default one.

How do you entertain a client?

Depending on the type of client, the usual means is to take them out for a meal at a decent restaurant - a restaurant is neutral ground for both parties, it sometimes helps to invite partners as this can be a good ice breaker. Good Luck..

What does security Lockdown mean?

It generally means that all computers are shut down, and cannot be accessed, and/or the doors of the building might be closed for good, so RUN! Just a joke.

What is the purpose of the spdif port?

A S/PDIF (Sony-Phillips Digital Interface) sound port connects to an external home theater audio system, providing digital output and the best signal quality.

Lexmark X7170 printer connected by usb to a win xp computer I want to share this printer on a network with a win 98 and a win ME when I try to add printer the icon for it disappears can you help?

In 2005, Lexmark advised me that "network sharing" an X7170 is only supported by their WinXP driver. Their Win98/WinME driver doesn't support this attachment method, and wiull not be enhanced. Try this workaround: -- USB connect the X7170 to your WinXP PC and install it there -- Then define it as a 'peer-to-peer' shared printer resource in that PC -- Now any other PC in that workgroup should be able to use it (through the WinXP PC) like any other shared resource Good luck...

How does a LAN switch work?

http://www.cisco.com/warp/public/473/lan-switch-transparent.swf http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a00800a7af3.shtml Go through this link to understand them better. This will answer all your questions and let me know if you have any other question

What is the History of ICT?

The IT History Society (ITHS) is a world-wide group of over 500 members working together to assist in and promote the documentation, preservation, cataloging, and researching of Information Technology (IT) history. We offer a place where individuals, academicians, corporate archivists, curators of public institutions, and hobbyists alike can gather and share information and resources. We also supply tools, advice, encouragement and assistance to IT companies looking to preserve their history, an activity that not only has far-reaching research value, but also offers a marked cost benefit to the company.

but i don't know if that's right