Page 188 - Computer_Science_F5

Another name for guided transmission Unshielded twisted pair cable
media is wired media. Examples Unshielded Twisted Pairs (UTP) cable
of guided media are metallic cable, comprises only wires and insulated
fibre-optic cable, and others. Guided cables. Unshielded Twisted pair cable Chapter Three: Advanced Computer Networks
transmission media use a cabling system (UTP) is the most common cable used
FOR ONLINE READING ONLY
that guides signals to a specific path from in telecommunication compared with
the source to the destination. Examples the Shielded Twisted Pair Cable, which
of guided transmission are twisted pair, consists of two conductors, usually
coaxial cable, and fibre optic cables. A copper, each with its colour plastic
twisted pair and coaxial cable transmit insulator. The UTP cabling is commonly
data in the form of electric signals, found in workplaces, schools, and
whereas optical fibre cables carry data homes. The reason for the popularity
in the form of light signals. of twisted pairs is their low cost. This
cable is easy to install and has the lowest
Twisted pair cable cost per meter of any cable. Figure 3.33
Twisted pair cables, also known as shows an example of an unshielded
Ethernet cables, are insulated cables twisted pair cable.
consisting of two copper wires twisted
together. Each twisted pair has a single
communication link. It is twisted
to minimise the effect of electrical
interference from nearly similar pairs,
which cancel each other. These cables
are less expensive and are mostly used
in telephone lines and LANs. There
are two types of twisted-pair cables:
Unshielded Twisted Pair (UTP) and
Shielded Twisted Pair (STP). Figure
3.32 illustrates a twisted pair of cables.
Figure 3.33: Example of unshielded twisted
Twisted cable
UTP cables consist of two insulating
copper wires (1mm thick). Electronic
Industries Association (EIA) has
developed standards for UTP cables
based on their performance. UTP cables
are divided into various categories
based on their capability to carry higher

Figure 3.32: An example of a twisted pair bandwidth. Examples of UTP cables are
cable Category 5 (Cat5), Enhanced Category 5

179
Student’s Book Form Five

Computer Science Form 5.indd 179 23/07/2024 12:33