Objective
- So that students understand the concept of computer networks on wireless communication media,
- So that students are familiar with wireless devices used in computer networks,
- So that students are able to design network topologies using WLAN components,
- So that students are able to configure WLAN using packet tracer.
Task
- Creating a computer network with a router, WiFi Router, client and server.
- All clients must be able to access the server.
Tools and materials
- PC
- Packet Tracer Software
Theoretical basis
Wireless is a medium for connecting nodes in a network that is invisible. By using wireless, a computer network will have many advantages because there are no cables hanging around and often creating a messy atmosphere.
Based on the criteria, wireless can be divided into 5 parts as follows;
- Wireless PAN (Personal Area Network), connected to wireless media, the application of this technology system is usually found in Bluetooth and IrDA.
- Wireless LAN (Local Area Network), connected with wireless media. The application of this technology system is based on forming a computer network that may not be reachable by a network that uses cables.
- Wireless Card, connected to the network media using a card, the application of this technology is usually often found in notebooks called PCMCIA (Personal Computer Memory Card International Association).
- Wireless Modem, a modem that is connected to a network media without cables.
- Wireless Bitmap, connected to the network media with graphic formats contained in WAP. Generally, the implementation of this technology system will slow down data transfer due to its large size.
According to Siswanto (2011) WLAN is a wireless local area network where the transmission media uses radio frequency (RF) and infrared (IR), to provide a network connection to all users within the scope of the area. An example of the area in question is the distance between classrooms on campus or from one office to another in a different building.
Devices that are commonly used for WLAN networks include PCs, laptops, PDAs, mobile phones, etc. The benefits of WLAN are numerous, such as PDA or gadget users can connect to the internet without cables flying around, whether accessing it on buses, cafes, etc.
Advantages of Wireless LAN
- High mobility and productivity, WLAN allows clients to access information in real time as long as it is within the WLAN range, thus improving the quality of service and productivity, as long as the location is within the WLAN coverage area, users can access the internet.
- Easy and fast to install, because the infrastructure does not require cables, the installation is very easy and fast.
- Flexible, with WLAN technology it is possible to build networks in areas where cables are impossible or difficult to reach, for example on buses, etc.
- Minimizes the cost of ownership, because one access point can cover the entire area, besides that the maintenance costs are also cheap (only covers cell stations, unlike cable networks which cover the entire cable).
Weaknesses of Wireless LAN
- Expensive equipment costs (this weakness can be eliminated by developing and producing electronic component technology, thereby reducing network costs).
- Large delays, radio propagation problems such as obstruction, reflection and many other potential interferences, but these weaknesses can be overcome by modulation techniques, antenna diversity techniques, spread spectrum techniques, etc.
- Network capacity faces spectrum limitations (frequency bands cannot be widened but can be utilized efficiently with the help of various techniques such as spread spectrum / DS-CDMA) and data security (confidentiality) is less guaranteed (this weakness can be overcome, for example, with spread spectrum techniques).
Experimental Procedure
- Download the Packet Tracer application at http://www.packettracernetwork.com/ (Windows) or ftp://rpmfind.net/linux/opensuse/update/12.2/i586/libopenssl1_0_0-1.0.1e-2.8.1.i586.rpm (linux)
- Install Packet Tracer on your computer, according to the OS used.
Practical Steps
Create 2 different networks with star topology, where network 1 (fastnet0) has 1 server, while network 2 (fastnet1) is a WLAN network without a server as seen in the top image.
Determine the IP Address, Default Gateway and DNS Server on the Server, as shown in the following image.
DHCP settings on the server.
Use the Save button if you want to update the existing configuration. Next, set the DNS on the server using the Server IP.
Adding Wifi device on Client PC for network 2.
Before changing the PC Client installation, turn it off first as shown by the power button above, then drop and move the LAN peripheral to the left side to remove it, then drop and move the Wifi peripheral to the PC to install it, do the same on all PC Clients on network 2.
Perform internet configuration on the Wireless router.
Default Gateway and IP Address are determined manually, while DNS server is the server IP. Then, configure the Gateway on the router. Fastnet 0 for network 1 is set with the default gateway of network 1 and fastnet 1 for network 2 is set with the default gateway of network 2, as shown in the image below.
Perform DHCP settings for IP configuration of all Client PCs.
Experimental Results
Use PC Client to access the jarkom4.com domain by clicking PC Client > Desktop > Web Browser.
Data access in the topology above only applies in one direction, because it is connected by a cross cable, to prove it, do a Ping PC Client between different networks, and the results are as shown in the image below.
No. 1 is successful, where PING is done from the Client PC of the WLAN network to the LAN network, conversely the PING from the Client PC of the LAN network to the WLAN results in failed.
Review
- Create a network connected with cables and Wifi to access a server
- All clients can access the server
Conclusion
Using a network with WiFi is more effective and practical than using cables.
Compiled By
NIM : 12131294
NAME : WAWAN CHAHYO NUGROHO
STUDY PROGRAM : INFORMATICS ENGINEERING LEVEL
: BACHELOR 1
EL RAHMA COLLEGE OF INFORMATICS MANAGEMENT AND COMPUTER SCIENCE
YOGYAKARTA
2014
Sunday, April 26, 2015
Lecturer
Eko Yunianto, S.Kom
NPP : 201430052
Bibliography
Computer, W, 2011, Network Administration with Linux Ubuntu 11, Andi Publisher, Yogyakarta. Siswanto, Joko, 2011, Computer Network and Data Communication Practical Module, STMIK EL Rahma, Yogyakarta.