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Computer Science

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Feb 20, 2024

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1/18/24, 9 : 58 PM Individual Response Page 1 of 9 about:srcdoc 3.1.7 Practice Questions Candidate: Joseph Vincent (jvince13) Date: 1/18/2024, 9:58:21 PM • Time Spent: 02:11 Score: 100% Passing Score: 80% Question 1. Correct You're installing network wiring for a new Ethernet network at your company's main office building. The project specifications call for Cat 5e UTP network cabling and RJ45 wall jacks. Near the end of the project, you run out of wire before the last few runs are complete. You have a spool of Cat 3 network cable in storage. Upon closer inspection, it appears very similar to the Cat 5e wiring. To finish the project, should you use the Cat 3 cabling as a substitute for the Cat 5e cabling? No. Cat 5e cabling uses a thicker copper wire than Cat 3 cabling, enabling higher data transmission rates. No. Cat 5e cabling has more twists per inch than Cat 3 cabling, reducing crosstalk and supporting higher data rates. No. The sheath surrounding Cat 5e cabling is much thicker than the Cat 3 sheath, creating an extra layer of shielding that reduces crosstalk and supports higher data rates. Yes. You can use Cat 3 cabling as a substitute for Cat 5e cabling since they're electrically identical. Explanation
1/18/24, 9 : 58 PM Individual Response Page 2 of 9 about:srcdoc While Cat 3 and Cat 5e cabling may appear physically similar, they're electrically different. Cat 5e cabling is twisted much more tightly than Cat 3 cabling. This reduces crosstalk and enables Cat 5e wiring to support much faster data transmission rates. References 3.1.1 Twisted Pair 3.1.2 Twisted Pair Facts 3.3.4 Use Punchdown Blocks q_twisted_pair_cat5e_np6.question.fex Question 2. Correct Which of the following cable types often includes a solid plastic core that keeps the twisted pairs separated? Cat 3 Cat 5 Cat 6 Cat 5e Explanation Cat 6 cables include a solid plastic core that keeps the twisted pairs separated and prevents the cable from being bent too tightly. Cat 3, Cat 5, and Cat 5e don't include a solid plastic core that keeps the twisted pairs separated. References 3.1.1 Twisted Pair 3.1.2 Twisted Pair Facts 3.3.4 Use Punchdown Blocks
1/18/24, 9 : 58 PM Individual Response Page 3 of 9 about:srcdoc q_twisted_pair_cat6_np6.question.fex Question 3. Correct You're adding new wires in your building for some new offices. The building has a false ceiling that holds the lights and provides an air path for heating and air conditioning. You'd like to run your Ethernet cables in this area. Which type of cable must you use? STP cables Cat 5e or Cat 6a cables Plenum-rated cable Fiber optic cables Explanation Plenum-rated cable is fire resistant and non-toxic. You must use plenum-rated cable to wire in air spaces used by heating and air conditioning systems. Cat 5e cables provide better EMI protection than Cat 5 cables, and Cat 6a cables are an improvement over Cat 6 specifications. However, neither of these qualities are a requirement for use in a ceiling area. If an area has a lot of EMI, you might consider using STP or fiber optic cables, but this isn't a requirement in a ceiling area. Typically, you can avoid EMI sources by re-routing cables. References 3.1.1 Twisted Pair 3.1.2 Twisted Pair Facts 3.4.1 Troubleshoot Copper Wiring Issues 3.4.2 Copper Wiring Troubleshooting Facts q_twisted_pair_plenum_np6.question.fex
1/18/24, 9 : 58 PM Individual Response Page 4 of 9 about:srcdoc q_twisted_pair_plenum_np6.question.fex Question 4. Correct Why might you use an RJ11 connector? You want to connect a 10GBaseT network to a switch card using a Cat 6 cable. You want to connect your computer to the internet with a DSL modem. You want to upgrade your 10BaseT network to 100BaseTX. You want to connect your computer to a network using a Cat 7 cable. Explanation RJ11 connectors are typically used for telephones and modems. RJ45 connectors are used for 100BaseTX. RJ45 connectors are used for 10GBaseT using Cat 6 cables. GG45 or TERA connectors are used with Cat 7 cables. References 3.1.1 Twisted Pair 3.1.2 Twisted Pair Facts q_twisted_pair_rj11_01_np6.question.fex Question 5. Correct
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