Training

jFujitsu Trainning
Network Understanding and troubleshooting
Module 1

Tethering: Usar el internet celular como modem para acceder a internet en una computadora. Es muy similar a un DataCard o AirCard, solo que el celular siempre tiene el chip sim dentro.

IP: It is a set of numbers that gives to the computer an unique address on the network.

Protocol: It is the set of rules thatdefines how the computers get connected.

CPE: Customer Premise Equipment, It is when the customer needs to give the approbation to make any change.

Broadband: Technology that allows to the bandwidth increase or decrease.

DSL: Digital Subscriber Line, it is a method to get internet. It can be Asymmetric or Symmetric.
ADSL: Asymmetric DSL, speeds are not the same, once is bigger.
SDSL:Symmetric DSL, both speeds are the same.

WiMax: WiFi network with a big scope.

FIOS: Fiber optic internet services, provided on the USA for Verizon.

Proxy: It is a server that works like a Firewall; It is used to block web pages.

Firewall: It can be a server or software, used to block ports on the network, or in the computer.

Encryption: Hide the information using software.LoopBack: It is a cyclical process, which connects the computer to his own IP address.

Domain: It is the name of the site or the name of a network.

Propagation: It is how the packages are distributed on the network.

VPN: Virtual Private Network

Server: It is a computer with a specific function on the network.

Network: It is 2 or more devices connected and sharing information.What do I need to connect to a Network?
* IP Address
* Device or computer
* Ethernet Card or the media
* NIC (Network Interface Card)
Internet is the biggest network. They are a lot of computers, servers, routers, modem are connected across the world.
Network Topologies: This is the way the computers are connected on the network. They can be as simple or complex as neededalso can be logical or physical.

Bus, Star, Token Ring, Ring, Mesh, Tree.

Network types:
* LAN: Local area network. Those are for regional areas, mostly are limited for walls, like an office.
* WAN: Wide area network. It is an extended network. It can cover all the downtown, for example.
* MAN: Metropolitan area network. It is a WAN, that can cover a country or a very big area.* WLAN (Wireless local area network) and WWAN (Wireless wide area network) they are the same that LAN and WAN, however they are cords free.
How the information is transmitted on the network?
The information goes over the network, on little amounts of data, called packages.
Each package must have:
* To
* From
* Address from sender and receiver
* Content to deliver
Themaximum size for a package is 65500 Kb.
How do I get an IP address?
At this moment the standard is the IPv4.
An IP is a set of 4 numbers separated by a dot (.), the numbers can go from 0 to 255.
Each IP address must be unique for each network.

Example: 192.168.1.55

We can get an IP manually or automatically.
If we use a manual configuration, the IP address must be provided for a ITperson.
If we use an automatic configuration, the IP address is provided for a DHCP Server.
Also the I can be static, meaning that never change, and dynamic, so, it can be changing, to prevent the IP to be known easily.

DHCP means: Dynamic Host Configure Protocol.

How can we get the computer IP address?

We will follow the steps to get it on a windows version greater that Windows2000.

Click on Start Button, then go to the Run Menu. On the window that appears, type Cmd or command and press enter.
Also can go to Start, Programs, Accessories, System Symbol.

Once that the black window appears, you need to type the ipconfig command and press Enter.

It will return the following information:

Connection specific DNS suffix: It is the name of the network or the...