Week 5 Posting - DNS

DNS is used every day, by almost everyone with an internet connection, it goes unnoticed until it fails. DNS or domain name system was created purely for hour human minds to be able to still access sites without having to remember each IP and port of connections. The way that it works is that “middle” server has a TLD or top-level domain, these are all around us, google.COM usa.GOV are good examples of TLD servers. Each cluster of TLD servers can host multiple sites such as google.com, when connecting to google.com the site will reach out to the google server and return a IP address that the computer can understand, such as 8.8.8.8.  Just think of DNS as a record of each address, a phonebook of sorts. Without DNS the internet could still function but it would be much harder for everyone.

Comments

Post a Comment

Popular posts from this blog

Week 6 Posting - IPv6

  IPv6 has been around for a while, and when it was first created it was for devices that all have an external IP address, with the idea of internal networks by allocating 10.x.x.x and 172.16-31.x.x and 192.168.x.x it enabled the continual use of IPv4. Even larger companies such as Facebook are slowly using IPv6 in the internal network due to the static internal/external IP. The additional thing is that IPv6 will likely not run out, with the number rivaling the amount of grains of silica on earth the end looks to be out of sight. I also like that IPv4 has 4 numbers that are easier to remember if the hostname is not working or DNS goes down. These are temporary work around but if in a production network IPv4 with different ports are much more capable that the integration of IPv6, but that is just my $0.02.   O’Hara, A. (2019, May 30). What is IPv6 and why do we need it? SpotX. https://www.spotx.tv/resources/blog/product-pulse/what-is-ipv6-and-why-do-we-need-it/#:%7E:text=W...
Read more