The Background Of Wifi Broadband

Published Date: 02 Nov 2017

NRIC: S8742435I

Topic 1

Introduction

Wifi Broadband

According to Peterson Davie "Computer Network"-pg138 Broadband wireless is use in a limited geographical area (home, office, building, campus) and to receive this type of Internet connection, consumers mount a small dish to the roof of their home or office and point it to the transmitter.

According to "Introduction to Broadband Wireless"-pg4 Broadband wireless is about to bring the broadband experience to a wireless context, which offers users certain unique benefits and convenience. Only ensures compatibility with any device that supports any one of the standards but also makes it possible for two such products to choose the widest bandwidth option for a particular.

WiMax Mobile

According to Peterson Davie "Computer Network"-pg143 WiMAX (Worldwide Interoperability for Microwave Access) Mobile is a broadband wireless solution that enables convergence of mobile and fixed broadband networks through a common wide area broadband radio access technology and flexible network architecture.

According to Peterson Davie "Computer Network"-pg144 WiMax Mobile does not incorporate mobility at the time of this writing, although efforts to add mobility are nearing completion as WiMax. Also in keeping with the last-mile niche, WiMax’s client system, called subscriber stations, are assumed to be not end-user computing devices but rather system the multiplex all the communication of the computing devices being used in a particular building.

WiBro

According to Wikipedia "http://en.wikipedia.org/wiki/WiBro " WiBro (Wireless Broadband) is a wireless broadband Internet technology developed by the South Korean telecoms industry and WiBro is similar to WiMax or HSPDA (High Speed Downlink Packet Access), but there are slight technical differences between them.

According to wiseGEEK "http://www.wisegeek.com/what-is-wibro.htm" Wibro has been in the workings for around the same time as from WiMax. This wireless technology introduced as a mobile broadband access in Korea as a mobile broadband but since it is based on Wimax and only Korean deploy Wibro.

Comparing

Wifi Broadband

Pros

Wireless to be connected wherever you are as long as it is within coverage.

Cons

Not recommended for hardcore online gaming due to latency issues.

WiMax Mobile

Pros

Wimax allows access to the widest array of devices including PC notebooks, smart phones, gaming devices, music players and more.

Cons

Wimax will be limited to more densely populated areas, leaving rural areas out of the technological loop.

WiBro

Pros

Economical and easy to install.

Broadband service in not only urban area but also rural & remote area.

Cons

Limitation of wireless bandwidth for use in high density areas.

Below table will show the minimize transfer rate, maximize transfer rate and channel bandwidth of the above three product.

Min Transfer rate

Max Transfer rate

Channel Bandwidth

Wifi Broadband

6.5 Mbps

11 Mbps

2.4 GHz

WiMax Mobile

Downlink

Uplink

13.6 Mbps

1.83 Mbps

Downlink

Uplink

8.8 Mbps

1.38 Mbps

5 to 10 MHz

WiBro

Downlink

Uplink

512 Kbps

128 Kbps

Downlink

Uplink

19.92 Mbps

5.53 Mbps

≥ 9MHz

Topic 2

Dynamic DNS

According to Cricket Litu & Paul Albitz "DNS and BIND 5th Edition"-pg230 Dynamic DNS is a service that uses a permanent domain name, this domain name can be your own domain name or a sub-domain from a free DDNS service provider. You can now identify your network device using this dynamic domain name from anywhere on the Internet.

According to About.com "http://compnetworking.about.com/cs/domainnamesystem/g/bldef_ddns.htm" Dynamic DNS that lets anyone on the Internet gain access to resources on a local network when the Internet address of that network is constantly changing. Standard users of the internet who connect to it via an Internet Service Provider will be allocated a numeric IP address by the ISP. The address may either be static, or may change from one session on the internet to the next dynamic.

According to Wikipedia "http://en.wikipedia.org/wiki/Dynamic_DNS" These are generally implemented in the user's router or computer, which notices changes to its IP address and automatically sends an update message to the DDNS service provider. The communication between the user's computer and the DDNS provider is not standardized, varying from one provider to another, although a few standard web-based methods of updating have emerged over time.

Advantages

According to Cricket Litu & Paul Albitz "DNS and BIND 5th Edition"-pg228 Dynamic update permits more than the simple addition and deletion of records. Updater can add or delete individual resource record, delete resource records with the same domain name, class and type such as all the address.

All delete all records associated with a given domain name. An update can also stipulate that certain records exist or not exist in the zone as a prerequisite to the update’s taking effect.

Disadvantage

According to About.com "http://compnetworking.about.com/cs/domainnamesystem/g/bldef_ddns.htm" The disadvantage of DDNS is that additional host software, a new potential failure point on the network, must be maintained.

Active Directory

According to Microsoft "http://technet.microsoft.com/en-us/library/cc978010.aspx" Active Directory–integrated DNS enables Active Directory storage and replication of DNS zone databases. Windows 2003 DNS server that is included with Windows 2003 Servers accommodates storing zone data in Active Directory. When you configure a computer as a DNS server, zones are usually stored as text files on name servers all of the zones required by DNS are stored in a text file on the server computer. These text files must be synchronized among DNS name servers by using a system that requires a separate replication topology and schedule called a zone transfer. If you use Active Directory integrated DNS when you configure a domain controller as a DNS name server.

To use DNS integration within Active Directory, assign the zone type Active Directory-integrated when you create the zone. Objects that represent zone database records are created in the Microsoft DNS container within the System container and the contents are replicated to all domain controllers in the domain. When you have Active Directory to integrated DNS zones, all Active Directory domain controllers that run Windows 2003 DNS server and are configured function as primary name server.