CIS145
This part of the website is to show you guys the work finished
in CIS-145 fall semester 2025.
Hit the Continue link at the bottom!
Computers are connected to each other, and they form what we
call networks. Computers have a built-in Network interface card
that allows us to plug in cables or connect them wirelessly.
A computer connected to the network helps us to communicate with
each computer inside the network. Each computer in the network is
called client, also any device connected to the network is known
as node or network node. A server could be a large computer that
manages the information that runs on the network.
All the computers on the internet have their own Ip address which
locates each of them, it works as a unique identifier. Ipv4 is written
(255.255.255.255), each ipv4 address contains 4 octets that range from
000 to 255. Ipv6 was created in the mid 90’s because we were running
out of ipv4 which was created as an experimental research network and
with the quick growth of the internet they were forced to create Ipv6
to be able increase the capacity to hold more computers in the network.
Originally ipv4 were able to provide 4.2 billion addresses now with
the inclusion of ipv6, ipv6 can provide billions of billions of billions
of times larger than the previous version of Ip address could ever provide.
However, people on the internet uses domain names to locate websites on
the web since it is easier to remember than to remember an IP address.
The DNS makes it possible to coordinate all the Ip addresses to its
domain names and no other computer on the internet could have the same
domain name. Top-level domain is what we see at the end of the domain
name. There are six top level domains, they are: .com, .net. org,
.gov, .mil, and .edu. The company responsible for these domains is
called Internet Corporation for Assigned Names and Numbers (ICANN).
ICANN also created sponsored top-level domain, which they are
sponsored by other organizations, these were introduced in the 2000
among them we see .aero which is used by the air transport industry,
.coop for cooperative organizations, and .museum used by museums.