NET102 Lab Experiment 1 Wiring A Twisted Pair Ethernet Network
NET102 Lab Experiment 1 Wiring A Twisted Pair Ethernet Network
NET102 Lab Experiment 1 Wiring A Twisted Pair Ethernet Network
GRADE
Objectives:
Materials:
Background
EIA/TIA wiring standards were first published in 1991 and has been
evolving ever since. The EIA/TIA-568 standard defines the specification of the
cable to be used as well as some installation rules. The latest version of the
EIA/TIA standard is 568B, which contains some minor enhancements to the
original 1991 standard. The most popular is Category 5, the highest-quality UTP
cable. It is tested at 100 MHz, allowing it to run high-speed protocols such as 100
Mbps Fast Ethernet and FDDI. Category 5 cable also uses either 22 or 24 AWG
unshielded twisted pair wire with impedance of 100 ohms.
The IEEE has defined three new physical layers for 100 Mbps Fast
Ethernet. By far, the 100Base-TX is the most popular one. However, the IEEE
also demands rigid compliance of how the cable is installed with RJ-45
connector. Otherwise, you will have high-speed data transmission problem -
NEXT. NEXT is the coupling of signals from one twisted pair to another. NEXT is
undesired because it represents unwanted spillover from one pair to other. The
result is corrupted data or no connection at all. Even you are using Cat 5 cable
with 4 twisted pair wires, it doesn't mean that the cable is 100% compliant with
EIA/TIA standard if it is not connected to RJ-45 in the way it should be.
An UTP cable (category 5) is one of the most popular LAN cables. This
cable consists of 4 twisted pairs of metal wires (that means there are 8 wires in
the cable). Adding RJ45 connectors at both ends of the UTP cable, it comes a
LAN cable they usually use.
(a) (b)
Figure 1 – (a) Internal Structure of UTP (Category 5), (b) UTP Cable with RJ-45
Connector
1. Pull the cable off the reel to the desired length and cut. If you are pulling cables
through holes, it’s easier to attach the RJ-45 plugs after the cable is pulled. Note:
The total length of wire segments between a PC and a hub or between two PC's
cannot exceed 100 Meters (328 feet) for 100BASE-TX and 300 Meters for
10BASE-T.
2. Start on one end and strip the cable jacket off (about 1") using a stripper or a
knife. Be extra careful not to nick the wires, otherwise you will need to start over.
3. Spread, untwist the pairs, and arrange the wires in the order of the desired cable
end. Flatten the end between your thumb and forefinger. Trim the ends of the
wires so they are even with one another, leaving only 1/2" in wire length. If it is
longer than 1/2" it will be out-of-spec and susceptible to crosstalk. Flatten and
insure there are no spaces between wires.
4. Hold the RJ-45 plug with the clip facing down or away from you. Push the wires
firmly into the plug. Inspect each wire is flat even at the front of the plug. Check
the order of the wires. Double check again. Check that the jacket is fitted right
against the stop of the plug. Carefully hold the wire and firmly crimp the RJ-45
with the crimper.
5. Check the color orientation, check that the crimped connection is not about to
come apart, and check to see if the wires are flat against the front of the plug. If
even one of these is incorrect, you will have to start over. Test the Ethernet
cable.
DATA RESULTS
NOTE: Discussion must be based on the data gathered from data results or
observation supported by review of literature with proper reference or author in-
text citation in APA format. Do not copy-paste instead paraphrase it. Data
analysis must be minimum of 2 pages.
QUESTIONS AND ANSWERS
Questions:
1. Give and explain three (3) cases or applications for each, where straight-
through and cross-over cables are used.
2. Give and explain two cases or applications, where rolled-over cable is
used.
3. Give the cable category (from Cat 1 to Cat 7) details including their rated
frequency in MHz, UTP standards, and uses.
Answers:
1.
CONCLUSION
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Andreasen, N. C. (2001). Brave new brain: Conquering mental illness in the era
of the genome. Oxford, England: Oxford University Press.
Copstead, L., & Banasik, J. (2005). Pathophysiology (3rd ed.). Philadelphia, PA:
Saunders.
Electronic Books:
Atkin, M. (Reporter). (2008, November 13). Bermagui forest disputed turf. The
Hack Half Hour. Retrieved from http://www.abc.net.au/triplej/hack/notes/
Cooper, D. (2009, March 31). Native ant may stop toad in its tracks. ABC
Science. Retrieved August 15, 2017 from http://www.abc.net.au/science/articles/
2009/03/31/2530686.htm?site=science&topic=latest
Print Journals:
Potente, S., Anderson, C., & Karim, M. (2011). Environmental sun protection and
supportive policies and practices: An audit of outdoor recreational settings in
NSW coastal towns. Health Promotion Journal of Australia, 22, 97-101.
Electronic Journals: