Computer Networking

Layer 3 network addresses are logical addresses and can be easily changed by software.

Networks covering a limited or small geographic area are typically called LANs (local area networks). Of course, it depends heavily on your description of "small geographic area"

Extranets are an add-on to an exiting company network, where as a WAN is any network that exceeds 2 kilometres squared (2 KM^2)

The octets are different - a class a is 255.0.0.0 and a class C is 255.255.255.0 for a default subnet mask. Of course, if you are subnetting then this doesn't apply.

No, this is a common misconception. The application layer is the interface between programs (applications) and the network layers.

To trace any IP addresses, just put the IP address at the back of IP2Location's url, such as http://www.ip2location.com/10.224.36.83 . 10.224.36.83 is a Private IP Address LAN. This is a Class A private IP range which is for huge organisations. It is for private use only and cannot be accessed on the internet.

Node

The MAC is maintained and used by the Data Link layer (layer 2).

It depends on what of modem you are referring to. Dial-up modems have been maxed out for years, and fewer and fewer people use dial-up every year. It will probably be almost completely gone within ten years.

Cable and DSL modems continue to gain in speed. 6 Mbp/s is a very common speed for cable modems these days, and can easily climb to 30 MBps with today's infrastructure. DSL is more dependent on city growth, since it doesn't reach well into rural areas like cable or satellite.

In web server you can deploy static contect and web server used to redirect http and https requests to application server and a proxy server can integrate multiple servers to handle webserver requests on behalf of webserver to application server.

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Without seeing the model it is difficult to know which is step two. If the model is shown then a person will be able to know which is step two.

The Peer-to-Peer networking model.

WPA2 implements the mandatory elements of 802.11i. In particular, it introduces CCMP, a new AES-based encryption mode with strong security.

For more information, go to the Wikipedia link attached to this post.

The same way that noise distorts and weakens a wired signal.

Error checking, ie. checksum

everyone knows that it is to continue a sentence it is to like stretch a sentence more further to make it more intresting.

switches

Yes, if you would like 911 to respond.

No...the physical layer is just that: The wires or COAX or fiber that physically makes up your network. If the switch were to work at a physical layer it would literally be opening or closing contacts to make the wires joined together be disconnected or connected...which is NOT the case, there is no physical opening/closing going on.

Switches I was trained on (in the mid-80's) worked based on MAC addresses of devices, that unique only-this-one-device-in-the-world number burned into end units. Or there is a possibility they might work higher up the protocol chain, on the Ethernet Address. it's been too long since I was involved with zeros and ones. But certainly not on the physical layer. Hopefully someone with more recent experience will update this answer for you...

A Craftman router table cost anywhere from sixty to seventy dollars. You can purchase a Craftman router table at Sears, online or locally at your store.

A surge protector is neither an input nor output device. It is an appliance designed to protect electrical devices from voltage spikes.

Please don't put up coursera quiz questions on answers sites. Use the forums if you have legitimate questions; the answer to this question is specifically stated in the Week 5 videos.

Well if you mean networks, then Yeah. There is.

Wired is directly conected to the router, while wireless is connected by frequencies labeled up to N ranks.

With websites;

They most likely mean that wired traffic is traffic you were expecting, a advertising campaign, and or a steady stream of traffic. Wireless is recommendations and such, not always constant, not always high. Only way to actually monitor it is to subtract the whole traffic by the traffic you received through your advertising.

A reliable data transfer is one that is stable . For a reliable data transfer a connection oriented protocol is used. A connection oriented protocol is one that receives acknowledgement from the receiver before sending the further data.