Computer Networks and Communications
Content
COMPUTER NETWORKS AND COMMUNICATIONS Assignment 3 LATEST DEVELOPMENT IN NETWORK AND COMMUNICATIONS
Name : Class : I.C. : Teacher : School :
INTRODUCTION
The purpose of a computer communications network is to allow moving information from one point to another inside the network. The information could be stored on a device, such as a personal computer in the networ , 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 sales transactions 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 of information to be moved, and due to the fact that each type of information has its own conditions for intelligibility, the computer network has evolved into a highly complex system. Specialized knowledge from many areas of science and engineering goes into the design of networks. It is practically impossible for a single area of science or engineering to be entirely responsible for the design of all the components. Therefore, a study of computer networks branches into many areas as we go up from fundamentals to the advanced levels.
MOBILE COMPUTING DEFINITION Mobile Computing is a generic term describing your ability to use technology , that is not physically connected, or in remote or mobile (non static) environments. The term is evolved in modern usage such that it requires that the mobile computing activity be connected wirelessly to and through the internet or to and through a private network. This connection ties the mobile device to centrally located information through the use of battery powered, portable, and wireless computing and communication devices. This includes devices like laptops with wireless LAN or wireless WAN technology, wearable computers and Personal Digital Assistants (PDAs) with Bluetooth or IRDA interfaces. SPECFICATION, SERVICES AND FREQUENCIES OF MOBILE COMPUTING SPECIFICATION Mobile computing used to be exclusively a matter of dragging a laptop computer around, plus various adapters and other widgets. “Road warriors” have more choices now. Of course, USB thumb drives, also called USB flash drives, are probably the benchmark technology for mobile computing these days; before you think about other methods, check if you can do it cheaper and easier with a thumb drive. SERVICES For its service, it has WLAN IEEE 802.11 b/g with UPnP support, Micro USB Connector plus 3.5 mm stereo headphone plug. It also has TV-Out Support, data transfer via Bluetooth 2.0, A-GPS and Internet surfing FREQUENCIES Bluetooth is an industrial specification for wireless personal area networks (PANs). Bluetooth provides a way to connect and exchange information between devices such as mobile phones, laptops, and video game consoles over a secure, globally unlicensed short-range radio frequency. The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group.
INTERNET TECHNOLOGY AND SERVICES VoIP Voice Over IP) A telephone service that uses the Internet as a global telephone network. Many companies, including Vonage, 8×8 and AT&T (CallVantage), typically offer calling within the country for a fixed fee and a low per-minute charge for international. Broadband Internet access (cable or DSL) is required, and regular house phones plug into an analog telephone adapter (ATA) provided by the company or purchased from a third party.
BLOG A blog is a lot like a journal except it is generally intended to be read by others. The topics for blogs vary greatly; some being about day to day activities and others taking a more corporate or political slant. There is no defined or widely accepted format and so blogs range from one liners that the author adds every few hours to relatively long, well thought out arguments for or against a topic of interest.
TYPES OF NETWORK PAN
A Personal Area Network (PAN) is a computer network used for communication among computer devices (including telephones and personal digital assistants) close to one person. 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 and Bluetooth.
VPN
Short for (Virtual Private Network), VPN is a type of network that allows a user to connect to a network through a tunneling protocol and access internal internet and intranet web sites and email. Virtual Private Networks are commonly used to allow an employee with a large company to connect to the company’s intranet
WLAN
A wireless LAN (or WLAN, for Wireless Local Area Network, sometimes referred to as LAWN, for local area wireless network) is one in which a mobile user can connect to a local area network (LAN) through a wireless (radio) connection. The IEEE 802.11 group of standards specify the technologies for wireless LANs. 802.11 standards use the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing and include an encryption method, the Wired Equivalent Privacy algorithm. A personal area network
WIMAX
WiMax is the industry term for a long-range wireless networking standard. WiMax technology has the potential to deliver high-speed Internet access to rural areas and other locations not serviced by cable or DSL technology. WiMax also offers an alternative to satellite Internet services.WiMax technology is based on the IEEE 802.16 WAN communications standard. WiMax signals can function over a distance of several miles / kilometers. Data rates for WiMax can reach up to 75 megabits per second (Mb/s). A number of wireless signaling options exist ranging anywhere from the 2 GHz range up to 66 GHz.
CONCLUSION
Mobile computing (like the peer to peer transaction model did) brings about a new paradigm of distributed computing in which communication may be achieved through wireless networks and users can compute even as they relocate from one support environment to another. The impact of mobile computing on systems design goes beyond the networking level and directly effects data management. Although being a relatively new area, mobile data management has attracted a lot of research efforts, motivated by both a great market potential and by many challenging research problems
Reference
http://en.wikipedia.org/wiki/image:Bluetooth.headset.jpg www.wimax.com/deployment/network
Name : Class : I.C. : Teacher : School :
INTRODUCTION
The purpose of a computer communications network is to allow moving information from one point to another inside the network. The information could be stored on a device, such as a personal computer in the networ , 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 sales transactions 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 of information to be moved, and due to the fact that each type of information has its own conditions for intelligibility, the computer network has evolved into a highly complex system. Specialized knowledge from many areas of science and engineering goes into the design of networks. It is practically impossible for a single area of science or engineering to be entirely responsible for the design of all the components. Therefore, a study of computer networks branches into many areas as we go up from fundamentals to the advanced levels.
MOBILE COMPUTING DEFINITION Mobile Computing is a generic term describing your ability to use technology , that is not physically connected, or in remote or mobile (non static) environments. The term is evolved in modern usage such that it requires that the mobile computing activity be connected wirelessly to and through the internet or to and through a private network. This connection ties the mobile device to centrally located information through the use of battery powered, portable, and wireless computing and communication devices. This includes devices like laptops with wireless LAN or wireless WAN technology, wearable computers and Personal Digital Assistants (PDAs) with Bluetooth or IRDA interfaces. SPECFICATION, SERVICES AND FREQUENCIES OF MOBILE COMPUTING SPECIFICATION Mobile computing used to be exclusively a matter of dragging a laptop computer around, plus various adapters and other widgets. “Road warriors” have more choices now. Of course, USB thumb drives, also called USB flash drives, are probably the benchmark technology for mobile computing these days; before you think about other methods, check if you can do it cheaper and easier with a thumb drive. SERVICES For its service, it has WLAN IEEE 802.11 b/g with UPnP support, Micro USB Connector plus 3.5 mm stereo headphone plug. It also has TV-Out Support, data transfer via Bluetooth 2.0, A-GPS and Internet surfing FREQUENCIES Bluetooth is an industrial specification for wireless personal area networks (PANs). Bluetooth provides a way to connect and exchange information between devices such as mobile phones, laptops, and video game consoles over a secure, globally unlicensed short-range radio frequency. The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group.
INTERNET TECHNOLOGY AND SERVICES VoIP Voice Over IP) A telephone service that uses the Internet as a global telephone network. Many companies, including Vonage, 8×8 and AT&T (CallVantage), typically offer calling within the country for a fixed fee and a low per-minute charge for international. Broadband Internet access (cable or DSL) is required, and regular house phones plug into an analog telephone adapter (ATA) provided by the company or purchased from a third party.
BLOG A blog is a lot like a journal except it is generally intended to be read by others. The topics for blogs vary greatly; some being about day to day activities and others taking a more corporate or political slant. There is no defined or widely accepted format and so blogs range from one liners that the author adds every few hours to relatively long, well thought out arguments for or against a topic of interest.
TYPES OF NETWORK PAN
A Personal Area Network (PAN) is a computer network used for communication among computer devices (including telephones and personal digital assistants) close to one person. 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 and Bluetooth.
VPN
Short for (Virtual Private Network), VPN is a type of network that allows a user to connect to a network through a tunneling protocol and access internal internet and intranet web sites and email. Virtual Private Networks are commonly used to allow an employee with a large company to connect to the company’s intranet
WLAN
A wireless LAN (or WLAN, for Wireless Local Area Network, sometimes referred to as LAWN, for local area wireless network) is one in which a mobile user can connect to a local area network (LAN) through a wireless (radio) connection. The IEEE 802.11 group of standards specify the technologies for wireless LANs. 802.11 standards use the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing and include an encryption method, the Wired Equivalent Privacy algorithm. A personal area network
WIMAX
WiMax is the industry term for a long-range wireless networking standard. WiMax technology has the potential to deliver high-speed Internet access to rural areas and other locations not serviced by cable or DSL technology. WiMax also offers an alternative to satellite Internet services.WiMax technology is based on the IEEE 802.16 WAN communications standard. WiMax signals can function over a distance of several miles / kilometers. Data rates for WiMax can reach up to 75 megabits per second (Mb/s). A number of wireless signaling options exist ranging anywhere from the 2 GHz range up to 66 GHz.
CONCLUSION
Mobile computing (like the peer to peer transaction model did) brings about a new paradigm of distributed computing in which communication may be achieved through wireless networks and users can compute even as they relocate from one support environment to another. The impact of mobile computing on systems design goes beyond the networking level and directly effects data management. Although being a relatively new area, mobile data management has attracted a lot of research efforts, motivated by both a great market potential and by many challenging research problems
Reference
http://en.wikipedia.org/wiki/image:Bluetooth.headset.jpg www.wimax.com/deployment/network
