Networking Tutorials

Wireless Networking - 4 (4.1) Types of Wireless Network  :-         Wireless networks can be established using two different ways. The two types of wireless networks are : Peer-to-Peer (P2P) or Ad-hoc or ISS Access Point or Infrastructure wireless LAN BSS (4.2)  Peer-to-Peer (P2P) or Ad-hoc or ISS  :-       In Peer-to-Peer (P2P) or Ad-hoc or ISS, multiple computers are connected wirelessly using Wireless NIC. This network allows wireless devices to directly communicate with each other. Wireless devices which are within each other's range can communicate with each other without the involvement of a Central Access Point. Computers can access pointers and share files using this type of networking, but cannot access a wired LAN resources.             The mode is similar to the Mesh Topology. It is basically used for creating a small wireless workgroup and hence is implemented where the number of user is less.          A Peer-to-Peer or Ad-Hoc type of Netwo

Wireless Networking - 3 Summary on What we have studied in last Tutorial  :- IEEE 802.11 :  Released in year 1997, this is the original version of 802.11 standard. It has a typical data rate of 1Mbps and maximum of 2Mbps in the 2.4 GHz band. IEEE 802.11a :   Modified in the year 1999. this is the improved version of the original 802.11 standard. The 802.11a standard operates in the 5 GHz band and uses 52-subcarrier orthogonal frequency-division multiplexing (OFDM) for signal generation. IEEE 802.11b :   This standard was also released in 1999. It has typical data rate of 6.5 Mbps and a maximum data rate of 11 Mbps in the 2.4 GHz band. The media access method used here is also Carrier Sense Multiple Access with collision Avoidance (CSMA/CA). IEEE 802.11g :   This standard was released in June 2003. It has a typical data rate 0f 22Mbps and maximum data rate 54Mbps in a 2.4 GHz band. The indoor range is 30 m. IEEE 802.11n :  This is the latest version of IEEE 80

Wireless Networking - 2 Summary on What we have Studied in last Tutorial  :- Wireless technologies allow one or more devices to communicate with each other without any physical connections such as cables. Wireless networking allows you to establish a communication between two or more computers. The communication is established using radio frequency (RF) and without the use of cables. Wired Networking requires cables to be connected to each and every computer in the network. It becomes difficult to run cables through walls and under the floor making it time consuming. Wireless Network can be configured in two ways: Ad hoc or infrastructure mode. Reliability of wireless network is less as compared to wired network. The main concern in wireless networks is interference from appliances using same frequency spectrum. However, with the proper installation the interference can be minimized. The different wireless standards that are used in wireless networking are IEEE 80

Wireless Networking - 1 Chapter Objectives :- Compare Wireless and wired network Explain different wireless standards Components required for wireless networking Different types of wireless networking bands Setup a wireless network Troubleshoot wireless network problems Various applications of wireless networking Introduction  :-       Wireless technologies allow one or more devices to communicate with each other without any physical connections such as cables. Wireless technologies use radio frequency transmission for transmitting data. Using wireless network data can be transmitted between a wireless computer and a wired computer. Users need not disconnect their laptops, instead they can around the office and perform their tasks effectively. There are advantages of using wireless networks over wired networks like setting it up and freedom from cable connections . (1) Wireless Networking Basics  :-          Wireless networking allows you to establi

MCQs on OSI Model Questions :-   (Q1). OSI Model consists of _ _ _ _ _ layers. seven two five four (Q2). The physical layer is concerned with the transmission of _ _ _ _ _ over the physical medium. Programs Protocols Bits Dialogs (Q3). The main responsibility of the _ _ _ _ _ layer is to deliver packets from source to destination. Network Application Transport Physical (Q4). Segmentation and reassembly are functions of the _ _ _ _ _ layer. Session Transport Presentation Application (Q5). Trailers to the data are added only at _ _ _ _ _ layer of the OSI model. Presentation Physical Network Data link (Q6). Frames are prepared by _ _ _ _ _ layer. Physical Data link Network Transport Answers :- I will not tell/show the answer's of the above Questions now. Rather I asks you all to find the answers. I will reveal answers when there will be more than 10 Comments to show the answers of above Questions. -----

Open System Interconnection  (OSI) Model - 4 Summary on what we have studied in last tutorial  :- Session layer establishes, manages, synchronizes and terminates connection between the computers. It also sets up, co-ordinates and terminates interactions and dialogues between communicating devices. The session layer is responsible for setting up sessions between communicating devices. It allows two devices to enter into dialog (communication process). At the session layer, checkpoints (synchronization bits) are added into a stream of data to synchronize the sessions. Presentation layer deals with syntax and semantics of the data exchanged between two devices. It transforms the data in the format that will be accepted by the application layer.   Presentation layer receives data from application layer. It adds header to the data and passes data to the session layer. The presentation layer also adds security to data by encrypting it. Encrypting is a process