Computer Networking

D-link dwa-140 should work fine.

Last time i checked, they were around $20-$25 on ebay, which is a lot cheaper that the samsung rip-off dongle (which in essence, is nothing but a re-badged DWA-140!).

Make sure you check the version of the D-link DWA-140 before you buy. I bought the B2 ver 1.71 and can't get it to work on my Samsung tv.

If you have switch from hub to switch, the answer is yes of course. Hub uses broadband connections all the time, when switch creates a virtual channel for each connection. It protects your network from somebody who wants to collect network packages which do not belong to that person. Some router have manageable interface and allow even filtering. Depending on model you are using you benefit more or less but still benefit anyway.

It's called a DHCP server. DHCP stands for Dynamic Host Control Protocol.

You don't need a stand-alone server to provide that function. Almost all routers (wired or wireless) will provide the function or "service", as it's called. And most operating systems will provide some level of it built in. Sometimes it's part of the "internet sharing" function.

firewall, router,layer 3 switches and i approve that answer !

NO! In general the firewall is a layer 4 device, it traffics filter incoming and outgoing ports. It uses the function of TCP and UCP. However a Firewall can also be a layer 3 device as in internal firewall in a router. Also a switch is a layer 2 device unless your talking about a Router switch.

it is 1mm2

It is 1/1,000th of a millimetre

Intrusion Prevention System (IPS) - Software which monitors network traffic or system activities for malicious activity and attempts to block said activity from accessing your network/machine.

Intrusion Detection System (IDS) - Software which monitors network traffic or system activities for malicious activity and alerts users on possible threats.

check the hello and dead intervals between the routers

Star topology is the simplest and most comprehensible example of a centralized network there is. In star topology, all of the computers, printers, security feeds, etc., etc. that use the network are connected to a centralized hub, rather than to each other, in a star-like shape. The main advantage of this is that if one device goes down, the others stay up.

The obvious disadvantage of this is the network's dependence on the hub; if it fails, everything fails. Many chain-store type business's, much to the frustration of their employees, have actually turned this disadvantage into an advantage. Instead of spending money on quality devices at the store level, the business's put all of their money into the hub, then add a backup hub as a fail safe, and then finally an off-site disaster recovery hub for emergencies.

If one wants to purchase a Coaxian audio cable, the one can purchase this at sites like Amazon. One can also purchase this at stores like Tiger Direct and Best Buy.

The port is one of buss word in computer networks. it is a number which can be used to identifies the physical coponent in the network ie.. ip address and also logical number of an applications available in application layer in TCP / IP.

Meta-analyses centrally collect logging data.

less than the data transfer rate

WAMP (Windows, Apache, MySQL, PHP/Perl/Python)

WAMP is a form of mini-server that can run on almost any Windows Operating System. WAMP includes Apache 2, PHP 5 (SMTP ports are disabled), and MySQL (phpMyAdmin and SQLitemanager are installed to manage your databases) preinstalled.

An icon on the taskbar tray displays the status of WAMP, letting you know if; a) WAMP is running but no services are opened (the icon will appear red), b) WAMP is running and one service is opened (the icon will appear yellow) or c) WAMP is running with all services opened (the icon will appear white). Apache and MySQL are considered to be services (they can be disabled by left-clicking on the taskbar icon, guiding your cursor over the service you wish to disable and selecting "Stop Service").

The files/web pages that are hosted on your WAMP server can be accessed by typing http:/localhost or http://127.0.0.1/ in the address bar of your web browser. WAMP must be running in order to access either of the above addresses.

If you would like to share your files/web pages with others, click on the icon located on your taskbar tray and select "Put Online." You must have access to the Internet in order to continue.

the ring topology is a network within which all computer are connected like in a circle. The ring topology data transmission is depending on a token. it's a programme given to a computer to allow it to communicate with others computers. it's useful but if one computer goes down, the topology is down too.

The physical connection is layer 1 of the OSI model, and is the medium through which the data is transfered. i.e., cables

The logical connection is layer 3 of the OSI model, and is the network portion. Using the Internetwork Protocol (IP), each host is assigned a 32 bit IP address. e.g. 192.168.1.1

packet sniffer

This address is used for multicast. EIGRP use this IP address.

== ==

I'm not a vandal or spammer I just haven't created a username and password yet but the answer to the question is that your physical address is burned into the net work card adapter on your PC or on Apple Macs by the manufacturer at the time of production and they are all unique. That physical address, just like your mailing address it is real, is also called your MAC address (Media Access Control address) and looks like this 00-56-7E-4A-DD-8D. The logical address is what the IP (Internet Protocol) address, can also be called virtual address, is and it looks like this 216.109.112.135 and is Yahoo's IP address. Your IP address can change and often does when you have a high speed Internet connection. This is called your DHCP Lease and it actually has an expiration date and time. When it expires you may get the same one or another one depending on what available IP addresses the DHCP server has available. You can also do this with the release and renew commands. You can look up the addresses on your computer with the ipconfig -all command in Windows command line utility (cmd on 2000/XP). To do this go to Start - RUN - type 'cmd'. Then your console window should open up. In there you can type 'ipconfig -all' and you will get the information about your physical address and IP address. To lookup Yahoo's or Google's address type ' nslookup yahoo.com or nslookup google.com and you should get the corresponding IP address of the web site. nslookup (name server lookup) is a network command line utility that will display the IP address of a site. I hope this helps as there is a great deal more information that I could write about these two address types.

TCP

The three way handshake verifies that data arrived

It means some software including the OS tried to access memory address which is protected and is not supposed to be used except the software which is already using it.

You should buy an omnidirectional antenna with a high gain (measured in dBi) if you have a wireless G or B router. If not, I recommend you to buy a wireless N router that comes with 3 antennas. It really increases your signal strength and range. You don't need to have a wireless N adapter to use it, as it supports the older modulations

because that is the last number of the subnet. the last number in a subnet is used as the broadcast domain. the first number is also not usable. an example would be:

id 192.168.20.XX

subnet 0f 255.255.255.128

192.168.20.0 and 192.168.20.127 may not be used and 192.168.20.128 starts the next subnet making 192.168.20.128 and 192.168.20.255 not usable

Not much.

The big breakthrough in making computing accessible to all was the Personal Computer, which was developed into the mass market by IBM. There were PCs before the IBM PC, but they were not successfully marketed at a huge scale.

IBM bought the disk operating system, the software to make the machine work, from Microsoft. Microsoft had itself bought the system from Seattle Software Works and they just licensed it to IBM.

There were other disk operating systems out there, including the very popular CP/M and MS-DOS was more or less derived from and very similar to CP/M.

The IBM PC took off spectacularly, and Microsoft became very rich. But their flair was (and still is) in marketing, not in invention. Mice, windows interfaces, desktop images, icons, etc. etc, were invented elsewhere, some by Xerox at their Palo Alto research centre, some by Apple, and quite a lot from the various Unix flavours out there.

If you find that you are having network troubles the first thing to do is check to see if the cable is plugged in correctly. If it is, try pinging your loopback address. If that doesn't work that means that there is a problem with your NIC and it should be replaced.