Computer Networking

Some common input devices are: a mouse, a keyboard, a microphone, a webcam. Common output devices are: monitor (LCD, LED, and CRT are the most common for computers), speakers, headphones, and printers.

PPTP

L2TP

OpenVPN

SSTP

IKE

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There are thousands upon thousands of IP addresses. Each Internet Provider is assigned a range of numbers. One gets assigned to you EACH time you enter the internet (or one of your programs accesses the Internet). That IP stays for that session. You may have the same IP hundreds of times--but then, get switched to a different one.

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Error 080040706 means that you are trying to uninstall a program. However, the error code means that it can not be uninstalled.

1. Make sure all devices are powered on. Modem should have Power light on.

2. Plug DSL phone line in from wall jack to modem. Modem should now have DSL light on (first with slow blink, then fast blink, then steady).

3. Plug Ethernet cable into modem, then into internet port (the one by itself) on the router. Modem should not have Ethernet light on, Router will have internet light on.

4. Type 192.168.1.1 in a browser window. User name is blank, password is admin.

5. Under internet connection type, change to PPPoE

6. Enter your Verizon user name and password. Make sure "Keep alive" is checked.

7. Save settings. You should be online.

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Router or bridge.

Net BIOS is a rudimentary basic operating system that allows a computer to pull boot information from another computer on the network. It's extremely useful for installations where a company may want hundreds or thousands of computers set up exactly the same way; a technician can install the programs on one computer, create a disk image, and then use a simple program booted from the Net BIOS to make the disk on the new computer an exact copy of the one on the original computer instead of installing programs on each computer individually.

Technically, a router can be flashed and custom programmed to run faster, and have higher wattage for WAN. I would not recommend doing this, as it may burn up your router and turn it into garbage if not done correctly. I have done this myself, and use it as a paperweight now. So the answer, YES it is possible but not recommended.

Router

In a virtual circuit network, information exchange occurs in a dedicated path between the source and the destination. Each active path is given some Virtual Circuit number on the fly. The routers in this path need to keep information about this path and to which interface the data, coming from a particular interface, has to be redirected. This information is termed as connection state information.

Whenever a new connection is established, this 'connection state information' has to be updated in router's table, and whenever the connection completes exchanging data this 'connection state information' has to be discarded.

In short, connection state information is the information required/maintained by a router to redirect data, to proper interface, in an active connection.

A

Protocol

internal ip is ur lan ip

external ip is ip of wan that is provided by isp

MAN

In the NIC. MAUs have tranceivers but aren't used on 100BASE-TX networks.

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wireless modem is a modem built in with wireless router, people use router seperately to connect to internet because their modem doesn't have a built in router. you can replace a wireless modem to a wirelss n modem.

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An Ethernet frame has a 14 byte header, a data section, and a 4 byte trailer

14 byte header consist of destination address, source address and type

The trailer is for CRC (Cyclic redundancy Check)

An Ethernet frame can contain an IP and TCP PDU.

IP header most important parts consists of (Version,IHL, Total length,Protocol, source and destination address)

In details (Version,Header length,Differentiated services field, total Length, Identification, Flags, fragment offset, Time to live, protocol, header checksum, source and destination address).

TCP header most important parts consists of (Source port, Destination port and header Length)

In details (Source Port, Destination Port, Sequence number, Acknowledgment number, Header length,Flags,Window and check sum).

The details of the IP and TCP header have been taken from a Network protocol Analyzer Wireshark on my own pc.

in spread sheet you can use mthods like A:10 ,C5 but in pen and paper you must to do the method in your mind and must to write them.