Computer Networking

If the destination is 192.168.12.135. and the subnet mask is 255.255.255.224, the the packet is sent to your mom's house.

The index is always in the front of a book, it shows which chapters and what page it is on.

the process of making something (such as a machine or computer program) ready to be used. : the way that something is done or organized

Your future business plan is an official statement that outlines your business goals for the future. It includes how your business will work and how you are going to make your business a success.

Providing PoE

spectrum |ˈspektrəm|noun ( pl. -tra |-trə|)1 a band of colors, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.• ( the spectrum) the entire range of wavelengths of electromagnetic radiation.• an image or distribution of components of any electromagnetic radiation arranged in a progressive series according to wavelength.• a similar image or distribution of components of sound, particles, etc., arranged according to such characteristics as frequency, charge, and energy.2 used to classify something, or suggest that it can be classified, in terms of its position on a scale between two extreme or opposite points : the left or the right of the political spectrum.• a wide range : self-help books are covering a broader and broader spectrum.ORIGIN early 17th cent. (in the sense[specter] ): from Latin, literally 'image, apparition,' from specere 'to look.'

The TTL or Time To Live is a value used to make packets eventually die, so they don't end up in infinite loops, clogging the network over time. Certain network devices decrement this value (routers mainly) by one as they process it. When the TTL reaches zero, the packet is discarded. Each Operating System implements its TCP/IP stack differently and starts packets off with the TTL of their choosing (the default TTL of the stack can be changed, but rarely is). Windows is 128 Linux is 64 Cisco is 256 So if your TTL is around 128 (remember the TTL gets decremented by certain devices) you are PROBABLY pinging a windows box. If it's near 256, probably Cisco etc. You can't rely on this information because other network devices can rewrite the TTL in a packet, but it's a decent indication of the OS on the other end, especially if it's a box you own and you aren't going through firewalls etc.

Using the Go Back N protocol for error control means that if a timeout occurs, then all unacknowledged packets are resent, where with selective repeat, only those packets that were unacknowledged. This allows the Go Back N to use cumulative acknowledgements, creating a faster data flow, but this also means that in the case of an interruption, the system is slower to recognize this and then time is lost for the retransmission since the last cumulative ack.

Skype is a online application where you are able to make voice calls over the internet. You may also use skype to video conference with other users. When you make voice calls, if you are contacting a skpe member it is free, and on the other hand when you contact someone who is not a member you will be charged.

You buy it from a internet provider than when you get the modem you plug it in and it will send signals down telegraph poles to the Internet Service Provider (ISP) and they will connect you then you are ready to go start 'surfing'.

The term broadband is a vague description of Internet connection speed. I say vague because it depends on who you talk to as to how fast a broadband connection is. However generally broadband can mean any connection faster than 64kps.

Next broadband doesn't describe the technology used to connect you to the Internet. There are multiple various technological methods to provide fast Internet connections. These can be ISDN ISDNII ADSL DSL RDSL CABLE WIMAX. Each one uses a different method.

Probably the most prevalent of these is ASDL which stands for asynchronous digital subscriber line. This uses an electrical signal which varies in amplitude (how strong the signal is) and phase (at what position in the waveform the signal is) to encode a number.

This technology is an answer to a specific question that of how to transmit high speed signals over a copper wire that can only really support low frequency signals, and because of that, this technology has it's limitations.ADSL's amplitude component of the signal fades over a long piece of wire. TCPIP being a self error correcting system will reduce the transmission speed of a carrier that drops looses or corrupts packets. therefore ADSL can suffer from slow connection rates if this occurs. Generally speaking the further you are away from the exchange the less signal is received and the more likely it is to be corrupted. Until recently connections to ADSL were limited to about 5 miles from the exchange, however research by a number of companies has produced an ADSL repeater which can boost the signal.

On top of this low level connection system is the protocol which is carried by the ADSL signal. This is either PPPOE or PPPOA which are connection protocols. PPPOE stands for The Point-to-Point Protocol over Ethernet (PPPoE) and PPPoA The Point-to-Point Protocol over ATM (PPPoA). It depends what kind of system your ISP uses as to which of these protocols are used to encapsulate packets over you internet connection.

The Inter NET(work) aka the Internet uses a protocol called TCP/IP (Transport Control / Protocol / Internet Protocol) to transmit numbers between computers. These numbers are encoded versions of programs, text and data.

The use of the word INTERnet is very important, originally many networks used different protocols (languages) to communicate between machines. The TCPIP protocol allowed for a method called encapsulation which allowed different protocols to be surrounded by TCPIP and therefore it allowed INTER-connectivity between NETworks sicne it could piggy back an unknown protocol on it. This meant that a Novel network (a different protocol) in New York could be connected to a Novel Network in Paris being piggy backed on TCP/IP.

Each time you connect to Microsoft.com you don't directly connect to the computer running the webserver at Microsoft. What actually happens is that your request is encapsulated by TCP/IP and then sent across lots of inter-connected computers to its final destination. You can prove this if you open a command prompt cli START>RUN>CMD in windows and run the command TRACERT www.Microsoft.com

You will see (nearly) all the computers that are engaged in getting you to your target. From my home is see in the order of seventeen computers sending my request bucket bridge style to Microsoft.

Your connection to a machine is almost never direct. If we were to draw a diagram of all the inter conencted machines of the planet it would start to look like a complex mesh network, it looks like a spiders web, hence the nickname "The Web". Everything you do on the internet is via third party computers, this is why you should NEVER assume that anything you do on the internet is private unless suitabley encrypted. Anyone monitoring the packets of data at your ISP can watch what is being done and from the method, ports and data sent can interpret exactly what program is being used to send that data. The likelyhood is that they probably arn't, but you can never tell. There is a big market at the moment with programs that can do this in an automated way for use by security and copyright protection at ISP's. These "Man in the middle" programs can even display what is on your screen without any malicious software at your end being involved.

Finally we get to the stuff you know, the browsers and general interface stuff. theres a lot more going on in networking.

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OSI model has seven layers and each layer is assigned a specific task for data transmission process.

A broadcast storm can cause a network to become too congested to transfer any useful traffic; switches are susceptible to broadcast storms.

a load balancing router distributes processes and communication activity evenely across a computer network so that one single device isn't overused. busy websites such as facebook use a load balancing router

three-leg perimeter configuration

The minimum category cabling for networking is cat 3 cable. That cable will allow you to transmit and receive on a LAN at a maximum of 10 Mbps.

This is a class C address, so the network number is 209.165.200.0, and the default subnet mask is 255.255.255.0

Protocols are a commonly agreed-upon set of rules for common communication between devices. At the data link layer they have to agree on the rules of how the frame is constructed, otherwise there would be no correct way to deliver frames to the intended systems.

If you want to use any printer, you have to install appropriate drivers. Thus you husband has to install same drivers too.

dont know dont care

RELIANCE is the more mobile wireless network in the World.

1ABC Inc. decided to integrate redundancy by connecting multiple hard disks to duplicate the information they

store. Which type of adapter will need to be installed on the servers to accomplish the desired redundancy?

The broadcast address for a class C network will always end in 255, in other words the fourth octet of the IP address will always be 255 (assuming your using classful addresses). For example, the broadcast address of the 192.168.1.0 /24 network is 192.168.1.255

Go to the bluetooth area in your laptop. See if your laptop recognizes your vizio tv. If not your laptop may not have the hardware for bluetooth.

From a command line: ipconfig or, for more info: ipconfig /all

From Windows itself, the control panel provides access to networking features and configuration.