Fsdfsa Essay

The Latest Development in Networks and Communication 1. 0 Introduction| The purpose of a computer communications network is to allow moving information from onepoint to another inside the network. The information could be stored on a device, such as apersonal computer in the network, it could be generated live outside the network, such as speech,or could be generated by a process on another piece of information, such as automatic salestransactions at the end of a business day. The device does not necessarily have to be a computer;it could be a hard disk, a camera or even a printer on the network.

Due to a large variety ofinformation to be moved, and due to the fact that each type of information has its own conditionsfor intelligibility, the computer network has evolved into a highly complex system. Specializedknowledge from many areas of science and engineering goes into the design of networks. It ispractically impossible for a single area of science or engineering to be entirely responsible forthe design of all the components. Therefore, a study of computer networks branches into manyareas as we go up from fundamentals to the advanced levels. | 2. 0 Mobile Computing| 2. 1 Definition|

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Using a computing device while in transit. Mobile computing implies wireless transmission, butwireless transmission does not necessarily imply mobile computing. Fixed wireless applications use satellites, radio systems and lasers to transmit between permanent objects such as buildings and towers. | 2. 2 Specification,service, and frequencies of Mobile Computing| Apple iPhone| Specification| Service| Frequencies| Processor: Marvell PXA310 Processor 624 MHz| Wireless connectivity: Bluetooth, Wi-Fi| Frequencies: 50 to 60 Hz| Display: 3. ” transflective TFT QVGA, 65K colours, 320 x 240 pixel touch screen with LED backlight| Dial Up Networking: * Wireless link to WAN thru Bluetooth enabled cell phone1 * Agnostic to WAN technology * Send/receive SMS messages| WLAN Frequancies: * 2,4000 to 2. 4835 GHz 2,4465 to 2. 4835 GHz (France) 2,4000 to 2,497 GHz (Japan)| Memory: 64 MB SDRAM main memory for running applications, 256 MB flash ROM| Generic Object Exchange and Object Push: Exchange business cards, tasks, documents, appointments. | | Wireless Technologies: Integrated WLAN 802. 11b/g, Bluetooth® 2. with EDR| Basic Printing Profile: Print to any HP Bluetooth enabled printer without the need for cables or specific print drivers| | Multimedia: HP Photosmart Mobile Software, Windows Media Player 10 Mobile| Personal Area Networking: Collaborate, chat, play games, exchange data Adhoc peer to peer networking| | Audio:Integrated microphone, receiver, speaker and one 3. 5 mm 4 pin stereo headphone jack| | | Memory Slots: SDIO high-capacity card slot – for memory expansion| | | Dimensions (WxDxH): 11. 7 x 1. 4 x 6. 9 cm| | | Aplication: Outlook 2002 Nevoware server, Nevoware renderer, Nevo backup, HP Image Zone 3. , HP Image Transfer, HP iPAQ Adobe Acrobat Reader, Active Sync 3. 7. 1, HP Mobile Printing| | | | 3. 0 Internet Technology and Service| 3. 1 Voice Over Internet Protocol(VoIP)| Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks. Other terms frequently encountered and synonymous with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and broadband phone. Internet telephony refers to communications services voice, facsimile, nd/or voice-messaging applications that are transported via the Internet, rather than the public switched telephone network (PSTN). The basic steps involved in originating an Internet telephone call are conversion of the analog voice signal to digital format and compression/translation of the signal into Internet protocol (IP) packets for transmission over the Internet; the process is reversed at the receiving end. VoIP systems employ session control protocols to control the set-up and tear-down of calls as well as audio codecs which encode speech allowing transmission over an IP network as digital audio via an audio stream.

Codec use is varied between different implementations of VoIP (and often a range of codecs are used); some implementations rely on narrowband and compressed speech, while others support high fidelity stereo codecs. | 3. 2 BLOG | A blog (a contraction of the term “web log”) is a type of website, usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse-chronological order. “Blog” can also be used as a verb, meaning to maintain or add content to a blog.

Many blogs provide commentary or news on a particular subject; others function as more personal online diaries. A typical blog combines text, images, and links to other blogs, Web pages, and other media related to its topic. The ability of readers to leave comments in an interactive format is an important part of many blogs. Most blogs are primarily textual, although some focus on art (Art blog), photographs (photoblog), videos (Video blogging), music (MP3 blog), and audio (podcasting). Microblogging is another type of blogging, featuring very short posts. 4. 0 Types of network| 4. 1 Personal Area Network(PAN)| A personal area network (PAN) is a computer network used for communication among computer devices, including telephones and personal digital assistants, in proximity to an individual’s body. The devices may or may not belong to the person in question. The reach of a PAN is typically a few meters. PANs can be used for communication among the personal devices themselves (intrapersonal communication), or for connecting to a higher level network and the Internet (an uplink).

Personal area networks may be wired with computer buses such as USB and FireWire. A wireless personal area network (WPAN) can also be made possible with network technologies such as IrDA, Bluetooth, UWB, Z-Wave and ZigBee. | 4. 2 Virtual Private Network (VPN)| A virtual private network (VPN) is a computer network that is layered on top of an underlying computer network. The private nature of a VPN means that the data travelling over the VPN is not generally visible, or is encapsulated from, the underlying network traffic.

Similarly, the traffic within the VPN appears to the underlying network as just another traffic stream to be passed. In more technical terms, the link layer protocols of the virtual network are said to be tunneled through the underlying transport network. The term VPN can be used to describe many different network configurations and protocols. As such, it can become complex when trying to generalise about the characteristics of a VPN. Some of the more common uses of VPNs are described below, along with more detail about the various classification schemes and VPN models. | 4. Wireless Local Area Network(WLAN)| A wireless local area network (WLAN) links devices via a wireless distribution method (typically spread-spectrum or OFDM radio), and usually provides a connection through an access point to the wider internet. This gives users the mobility to move around within a local coverage area and still be connected to the network. Wireless LANs have become popular in the home due to ease of installation, and the increasing popularity of laptop computers. Public businesses such as coffee shops and malls have begun to offer wireless access to their customers; sometimes for free.

Large wireless network projects are being put up in many major cities: New York City, for instance, has begun a pilot program to cover all five boroughs of the city with wireless Internet access. | 4. 4 Worldwide Interoperability for Microwave Access(WIMAX)| WiMAX, meaning Worldwide Interoperability for Microwave Access, is a telecommunications technology that provides wireless transmission of data using a variety of transmission modes, from point-to-multipoint links to portable and fully mobile internet access.

The technology provides up to 10 Mbps broadband speed without the need for cables. The technology is based on the IEEE 802. 16 standard (also called Broadband Wireless Access). The name “WiMAX” was created by the WiMAX Forum, which was formed in June 2001 to promote conformity and interoperability of the standard. The forum describes WiMAX as “a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL”. | 5. 0 Conclusion|

The latest development in networks and communication brings more useful to IT user which canmakes lifes way easier in networking and communicate. | References| * http://www. wikipedia. com| * http://www. yourdictionary. com/computer/mobile-computing| * http://www. ciao. co. uk/HP_iPAQ_114_Classic_Handheld__Review_5734594| * http://www. scribd. com/doc/15003764/The-Latest-Development-in-Network-and-Communication * Discovering Computing 2007 (Shelly Cashman Vermaat)| |


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