Jaringan Dasar Wireless

1

Wireless security In the Router:•Change the default Service Set Identifier (SSID)

•Disable the SSID broadcast •Change the User Name and Passwords on the wireless router

•Set up the wireless encryption •Setup the MAC Filter •Change the routers local IP address

2

Wireless Security – Encryption Types

•Wired Equivalent Privacy ( WEP ) •The oldest encryption method •Uses a 64-bit or more secure 128 bit key

•Wi-Fi Protected Access ( WPA ) •Newer encryption method that uses 256-bit key

•Wi-Fi Protected Access 2 ( WPA2 ) •Newest encryption method •Backward compatible with WPA

3

Setting up your Wireless Router•Things you need to know

•Who is your ISP • What type of Internet connection are you using

• User name and password if required•Brand of router

• Default local IP address• Default User Name• Default Password

4

Sample default Local IP Address, User Name, and Password

Brand Local IP Address

User Name Password

Linksys 192.168.1.1

admin

Belkin 192.168.2.1

D-Link 192.168.0.1

admin

USRobotics

192.168.2.1

Must set up Must set up

Netgear 192.168.0.1

admin password

Air Link 192.168.1.1

admin admin

5

Demonstration on setting up

wireless router•Use setup CD that came with router

•If you already have a router installed you should remove it first. The installation software will try to determine the type of connection

•Or•Bring up browser and access router

•Inter routers local IP address in the URL

•Inter the default User Name and Password

•Setup router

6

Setting up the wireless adapter in the remote PC

•You must know the SSID and encryption KEY for the network you wish to connect. We entered these in the router.

•Types of wireless networks •Infrastructure •Ad-Hoc

•For this demonstration we will be using an Infrastructure network

7

Description of the networks for your information

•Infrastructure network • Wireless network centered about an access point

• Access point• Provides communication with the wired network

• Mediates wireless network traffic in the immediate neighborhood

Topologi Wireless LAN• Infrastruktur atau Basic Service Set (BSS)

a)

b)

9

Description of the networks for your information

•Ad-Hoc • Are point-to-point networks

• May consist of two or more mobile computers • A collection of computers which propagate the signals. (A to B to C to A).

• May be simple point to point

Hey, how’s it hanging?Hello,

hello, is anyone there?

Topologi Wireless LAN• Ad-hoc atau Independent Basic Service Set (IBSS)

11

Description of the networks for your information

•Ad-Hoc • May be a more complex system with multiple entities

12

The type of wireless adapters •Will depend on your wireless PC

•For a desktop • PCI adapter • USB adapter

•For the laptop • PC card ( PCMCIA card) • USB adapter

•Use an adapter that matches your router to get maximum throughput

13

Installing the wireless adapter •Use the installation instructions that come with your wireless adapter

•Using the correct sequence•Install hardware•Use CD that comes with the hardware

• Install the driver • Install the software (utility program)

14

Connecting the wireless computer to the access point•Have the remote computer scan for networks •Find SSID of your network and select it• enter the encryption key that was used to set up the wireless part of the router

• Confirm key if necessary•Click on connect

•You should be connected to the network

15

Finalize Wireless Security as needed•Disable the SSID broadcast if wanted

•Change the User Name and Passwords on the wireless router

•Setup MAC Filter •Change the routers local IP address

16

Additional informationAcronyms

• AES Advanced Encryption Standard • DSL Digital Subscriber Line. Usually through your telephone company

• DHCP Dynamic Host Configuration Protocol• HTTP "HyperText Transfer Protocol” This is the protocol used to format and transfer data over the internet. When you enter a URL in your browser, this actually sends an HTTP command to the Web server directing it to fetch and transmit the requested Web page..

• IPSEC IP Security• ISP internet service provider• LAN local-area network• L2TP Layer Two (2) Tunneling Protocol. Used with virtual private network

• MANET mobile ad-hoc network• MIMO multiple-input multiple-output• Mbs million bits per second

17

Additional informationAcronyms

• PCMCIA Short for Personal Computer Memory Card International Association. PC card.

• PING Packet Internet Groper, A utility to determine whether a specific IP address is accessible

• PPPoE Point-to-Point Protocol over Ethernet• PPTP Point-to-Point Tunneling Protocol. Used with virtual private network

• SSID Service Set Identifier• TKIP Temporal Key Integrity Protocol. Used with virtual private network

• USB Universal Serial Bus• URL An Internet address (example, http://www.google.com or 64.233.187.99 are the sane location)

• VPN virtual private network• WAN wide-area network• WEP Wired Equivalent Privacy

Wireless Network 7

Jenis-jenis Wireless Network

••Wireless PANWireless LAN•••

Wireless BroadbandWireless WANCellular Networks

Wireless DataNetwork

WirelessTelephony

CakAeik - KIPLI

Topologi Jaringan Wifi dibagi dua :

Cak Aeik (pderl) pengelola www.produktiftkj3.blogspot.com

1. Ad Hoc/ Peer to Peer (Point to Point (P2P))NetworkingAd Hoc merupakan jaringan sederhana dimana komunikasi terjadi diantara 2 perangkat atau lebih pada cakupan area tertentu tanpa harus memerlukan sebuah access point atau server. Setiap host cukup memiliki transmitter dan receiver wireless untuk berkomunikasi secara langsung satu sama lain. Kekurangan dari mode ini adalah komputer tidak bisa berkomunikasi dengan komputer pada jaringan yang menggunakan kabel. Selain itu, daerah jangkauan pada mode ini terbatas pada jarak antara kedua komputer tersebut.

2. Infrastructure/ Point to Multipoint (P2MP) / Client-ServerMenggunakan Access Point sebagai pengatur alokasi waktu transmisi untuk semua perangkat jaringan dan mengizinkan perangkat mobile melakukan proses roaming dari sel ke sel. Penambahan dan pengaturan letak access point dapat memperluas jangkauan dari Wireless network.

Topologi pada Jaringan terdiri dari :

1. Topologi Ad-Hoc

2. Topologi Infrastruktur

Topologi Ad-Hoc•Jaringan wireless Ad hoc adalah kumpulan node (atau router) wireless mobile yang secara dinamis keberadaannya tanpa menggunakan jaringan infrastruktur yang ada atau administrasi yang terpusat.

•Jaringan wireless Ad Hoc dapat juga dikatakan sebagai desentraslisasi jaringan wireless.

•Jaringan ad-hoc merupakan bentuk komunikasi jaringan wireless yang paling sederhana.

Topologi Ad-Hoc (2)•Pada jaringan Ad Hoc, router dapat dengan bebas melakukan organiasi jaringan yang berakibat topologi akan berubah dengan cepat dan sulit untuk diprediksi. Dengan fitur ini, jaringan Ad Hoc mengalami beberapa tantangan antara lain,• Multihop• Mobility• Kombinasi jaringan yang besar dengan berbagai peralatan yang berbeda

• Bandwidth• Keterbatasan konsumsi battery

Topologi Ad-Hoc (3)•jaringan Ad Hoc juga memerlukan protokol routing karena setiap node memerlukan pertukaran data.

•Berbeda dengan jaringan infrastruktur, jaringan ad-hoc tidak membutuhkan sebuah wireless lan untuk menghubungkan masing-masing komputer dan topologi jaringan yang terbentuk adalah jaringan mesh.

Topologi Ad-Hoc (4)•Berikut adalah beberapa keuntungan dari sebuah jaringan wireless ad-hoc:• Jaringan wireless Ad-Hoc sangat sederhana dalam men-setup nya. Tancapkan adapter wireless ke pada laptop / computer, configure softwarenya, dan andapun sudah bisa melakukan komunikasi antar laptop

• Jaringan Ad-Hoc adalah murah karena anda tidak memerlukan sebuah wireless access point.

• Jaringan Ad-Hoc adalah cepat. Rate throughputnya antar adapter dua kali lebih cepat daripada anda menggunakan wireless access point dalam topology infrastcruture.