Unit Three Seminar Option Two 1

Unit Three Seminar Option Two

IT 273

Alex Brown

Unit Three Seminar Option Two 2

This seminar discusses numbering systems, physical hardware, different types of cables, and how these cables work for transmission of data.

First, some common network services were discussed. Terms such as server, DNS, DHCP, and MTA. There was a recap on TCP/IP protocols and what some of the different types were such as HTTP, FTP (file transfer), POP3 (email), and SSL (security).

Numbering systems were then discussed after the recap of the terms from previous weeks. There are three different types of numbering systems and the three systems are decimal, binary, and hexadecimal. A decimal numbering system is a Base 10 numbering system because there are 10 possible values for each place. A binary numbering system is a Base 2 numbering system because there is only two possible number which is 0 or 1. Binary is the computer programming language and how computers communicate. A hexadecimal numbering system is a Base 16 because there are 16 possible numbers in each place. A hexadecimal system uses letters along with numbers in order to create an address. The hexadecimal numbering system is used in IPv6 because it allows for more combinations of addresses. Also, during seminar how to translate binary to decimal, decimal to binary, or binary to hexadecimal was explained. I believe I understand the conversion and how these numbers work but are still working on this and have tried a few different methods.

There are four main types of physical cables and they are shielded/unshielded twisted pair, coaxial, and fiber optic. Each type of cable has its own purpose and negatives/positives. Shielded and unshielded twisted pair cables are widely used because they are inexpensive, flexible, and works with newer protocols. These cables can susceptible to EMI or eavesdropping, but the positives outweigh the negatives. Coaxial cable is widely used for cable TV and cable internet. This cable is strong and resistant to damage and eavesdropping but coaxial is expensive Unit Three Seminar Option Two 3

and harder to install. Fiber optic cables use beams of light to send data through a glass tube to transmit the data at a high rate. This technology is ten times more expensive than standard UTP cables. There are many different modes that these fiber optic cables can operate on and each has its own positives and negatives. There was a wrap up of discussing wiring distribution and some associated terms.

This seminar discussed numbering systems, physical hardware, different types of cables,

and how the transmission works over those cables.