NETWORK CONFIGURATIONLAN AND WIFI SETUP

Dr. Zeeshan Bhatti

Lecture 3

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LAN Setup 10BaseT Ethernet

802.11g Wireless

10BASET ETHERNET SETUPTo connect a 10BaseT Ethernet network:

Install a network interface card (NIC) into each computer (host)

Connect each NIC to a hub or switch, using unshielded twisted pair (UTP) cabling

Hub:

Every frame received by a hub is reproduced on all of it’s ports

Switch (or Cable/DSL Router):

Every frame received by a switch is examined, and the correct port is determined for the frame

A Cable/DSL also provides network address translation (NAT)

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LAN NETWORK CABLE CONNECTION

Generally LAN cables are called Unshielded Twisted Pair. There are two cable systems.

Straight cable.

Crossed cable.

The straight and crossed cable systems are shown below:

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COLOUR CODING FOR STRAIGHT CABLE

Straight colour systems are used to connect PC to Hub or Hub to PC. Insert the wire into the connector. Hold both connectors face same. See below.

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You have to follow a colour coding system to connect the wire into each port of the connector. There are eight ports in the connector. Colour coding is shown below for both ends of the cable:

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COLOUR CODING FOR CROSSED CABLE SYSTEM

Crossed cable systems are used to connect PC to PC or Hub to Hub. You have to follow a colour coding system to connect the wire into each port of the connector.

The system is shown below

One End Other End

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By using this method you can successfully connect your LAN connection.

Connect your PC and Laptop by using straight cable system.

After all the connection was set, it is required to configure LAN and Internet connection. How to configure LAN and internet connection will be discussed in in next section.

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802.11G WIRELESS SETUP

To setup a 802.11g wireless network:

Install an 802.11g (or 802.11b) NIC into each host

Plug a wireless router or base station into your Internet connection (e.g. cable modem)

Configure the SSID and security protocols on the wireless router and each of the NICs

e.g. WPA encryption, and specify the key

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AD HOC WIRELESS NETWORKS

If you have only a few hosts (2-3), you can create an ad hoc network

This type of network does not have a base station (or wireless router)

The hosts communicate directly with one another

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WIRELESS NETWORKS COMMENT

A wireless network connection is often not useful for a desktop PC

For this reason, wireless routers typically contain a few Ethernet ports

It is typical to have desktop PCs wired, and notebooks and PDAs will have wireless

e.g. Notebooks with 802.11g and PDAs with 802.11b

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PACKET SNIFFERS

Packet sniffers are a useful tool for exploration of networking They can also be used by network programmers to diagnose packet format errors

They typically examine many protocols This includes the header information e.g. Wireless, Ethernet, TCP/IP, HTTP

Some common packet sniffers are: Ethereal (Linux/Mac/Windows, multi-protocol) TCPDump (Linux/Windows, TCP/IP)Kismet (Linux, wireless)

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ETHEREAL TUTORIAL

Here is how to sniff packets using Ethereal: Start Ethereal

Select the correct network interface

Start capturing packets, stop when done

Select a packet from the list

Examine the packet hierarchy and header information, such as: Ethernet or wireless frame headers

IP datagram headers

TCP datagram headers

SMTP message

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Wireless and Network Device Installation

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WIRELESS AND NETWORK DEVICE INSTALLATION

Device installation techniques are always complex

Too many “Unrelated” technologies are scattered

across Windows

Installation requirements are unique for each technology.

Each having specific technical challenges

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PROBLEMS WITH INSTALLATIONConcept of “Pairing” too complex

Too many technologies

Vendors implement differently

No generic Windows solution

Net result

High rate of returns

High customer service calls

Slow adoption of technology

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SOLUTION: "ADD A DEVICE" WIZARD

Unified solution: One size fits all Inbox wizard

Simple steps to discover/pair devices

Abstracts technology

Install “devices” not “technologies”

No tech-specific terminology

Enables end to end Rally Experience

Device install with no CDRom

Inbox drivers or Windows Update

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SCENARIO: DEVICE PAIRING

Goal: Pair PC to a device

Discover devices

Associate/pair device with PCMultiple technologies

Bluetooth

Wireless USB

Rally Experience (UPnP/WSD)

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SCENARIO: WIFI FACILITY

Goal: Configure device to use WiFinetwork

Discover unprovisionedWiFi devices

Provision with WiFinetwork profile

Any WPS device

Access Point, Printer, etc

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SCENARIO: VERTICAL PAIRING

Goal: Pair WiFi device with PC

Discover unprovisionedWiFi device

Provision device with WiFi settings

Pair PC with device

Enables “Rally Experience”

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HOW TO LAUNCH

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HOW “ADD A DEVICE WIZARD” WORKS

Wizard with 3 phases:

Discovery

Ceremony

Completion

Post wizard

NCD Devices: PnP-X device presence detection

PnP driver loading

Management

Devices and Printers

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ADD DEVICE WIZARD: DISCOVERY

Displays all pairable devices

Continuously updates

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ADD DEVICE WIZARD: CEREMONY

Walks through pairing steps

Simple to use

Consistent across technologies

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ADD DEVICE WIZARD: COMPLETION

Indicates pairing success or failure

Failure lists mitigation steps

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ADD DEVICE WIZARD: POST PAIRING

Bluetooth/Wireless USB

PnP loads drivers

WSD/UPnP/WiFi

PnP-X detects device presence

PnP loads drivers

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UNIFIED PAIRING WORK FLOW

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Dell

SE198FWP

Logitech

MX1000

Logitech

diNovo

Dell XPS

Completion4

Devices & Printers1

Ceremony3Discovery2

Dave’s

Phone

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