The History Of Dynamic Dns

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 partial geographical area (home, office, building) and to receive this type of Internet connection, consumers ascend 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 fetch the broadband experience to a wireless framework, which offer users certain only one of its kind 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 enable union of mobile and fixed broadband networks through a widespread area broadband radio access technology and flexible network construction.

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

WiBro

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

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

Comparing

Wifi Broadband

Pros

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

Cons

Not compulsory for hardcore online gaming due to latency issue.

WiMax Mobile

Pros

Wimax allow in the access to the widest array of device including PC laptop, smart phones, gaming devices, music players.

Cons

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

WiBro

Pros

Economical and easy to install.

Broadband service in not only urban area but also rustic & isolated area.

Cons

Restriction 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 enduring domain name, this domain name can be your own domain name or a sub-domain from a free DDNS services provider. You can now spot 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 possessions on a local network when the Internet address of that network is constantly change. Model users of the internet who connect to it via an Internet Service Provider will be allocated a numeric IP address by the ISP. This address may either be static, or may change from one session on the internet to the following dynamic.

According to Wikipedia "http://en.wikipedia.org/wiki/Dynamic_DNS" These are generally implement in the user's router or computer, which notices changes to its IP address and repeatedly sends an update message to the DDNS service provider. The communication among the user's computer and the DDNS provider is not standardized, varying from one provider to another, although a few standard web-based method 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 adding and deletion of records. Updater can add or delete limit 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 specify that certain records exist or not exist in the zone as a precondition 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 integrates DNS enable Active Directory storage and duplication of DNS zones database. Windows 2003 DNS server that is including with Windows 2003 Server accommodates storing zones data in Active Directory. When you construct a computer as a DNS server, zones are more often than not stored as text files on name servers all of the zones require by DNS are store in a text file on the server. These text files must be coordinated among DNS name servers by using a system that requires a divide replication topology and schedule called a zone transfer. If you use Active Directory integrate DNS when you configure a domain controller as a DNS name server.

To use DNS integration within Active Directory, allocate the zone type Active Directory-integrate when you create the zone. Objects that correspond to zone database records are created in the Microsoft DNS container within the System container and the content are replicate 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 configure as primary name server.