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Ch 3. chapter review
| Question | Question | Answer | Answer |
|---|---|---|---|
| 3 in which of the following categories is UTP cable not rated? A. Category 2 b. category 3 c. category 5e d. category 8 | 3 | 3 D. Unshielded twisted-pair has standards from Category 2 through 6 for use on Ethernet networks. There is no Category 8 defined. | 3 |
| 4 what type of connector does UTP cable typically use a. BNC B. ST C. RJ-45 D. SC | 4 | 4 C. UTP usually connects with RJ-45. You use a crimper to attach an RH connector to a cable. | 4 |
| 5 Which of the following provides the longest cable run distance? a. single-mode fiber b. multimode fiber c. category 3 UTP d. coax | 5 | 5 A. Single-mode fiber allows for the maximum cable run distances. | 5 |
| 6 you need to crimp on a connector using an RJ-45 connector. which pin-out configuration would you use to connect a host into a switch? a. UTP b. straight-through c. crossover d. rolled | 6 | 6 B. You would use a straight-through cable to connect a host to a switch, and the typical pin-out is called 568A. | 6 |
| 7 fiber-optic cable is immune to electromagnetic interference (EMI) and radio frequency interference (RFI) because it a. transmits analog signals using electricity b. transmits analog signals using light impulses | 7 c. transmits digital signals using light impulses d. transmits digital signals using electricity | 7 C. Fiber-optic cable transmits digital signals using light impulses rather than electricity; therefore, it is immune to EMI and RFI. | 7 |
| 8 what type of cable transmits lights from end to end? a. coax b. fiber-optic c. UTP d. category 2 | 8 | 8 B. Remember that fiber-optic cable transmits a digital signal using light impulses. Light is carried on either a glass or a plastic core. | 8 |
| 9 what is the main difference between single-mode fiber (SMF) and multimode fiber (MMF)? a. electrical signals b. number of light rays c. number of digital signals d. signal-mode can be run a shorter distance | 9 | 9 B. The difference between single-mode fibers and multimode fibers is in the number of light rays (and thus the number of signals) they can carry. Generally speaking, multimode fiber is used for | 9 shorter-distance applications and single-mode fiber for longer distances |
| 10 what type of cable should be used if you need to make a cable run longer than 100 meters? a. category 5e b. category 6 c. fiber-optic d. coaxial | 10 | 10 C. Standards limit UTP to a mere 100 meters. Different fiber-optic types have different maximum lengths, but fiber-optic is the only cable type that can extend well beyond 100 meters. | 10 |
| 11 which of the following are fiber-optic connectors? select 3 a. BNC B. ST C. RJ-11 D. SC E. LC F. RJ-45 | 11 | 11 B,D,E. There are many different types of fiber-optic connectors. SC, ST, LC, MT-RJ. are some of the more typical connectors in use today. | 11 |
| 12 You need to connect two devices on a vertical connect and they need to send voice traffic. which of the following cable will you use? A. Cat 3 b. cat 5 c. cat 8 d. rolled | 12 | 12 B. To connect two devices for voice on a vertical connect, the minimum cable you can use is Category 5. | 12 |
| 13 how many hosts on a half-duplex segment can talk at one time? a. 0 b. 1 c. 2 d. unlimited | 13 | 13 B. In half-duplex communication, a device can either send communication or receive communication, but it cannot do both at the same time. | 13 |
| 14 which type of cable does EMI have the least effect on? a. coax b. fiber-optic c. UTP D. STP | 14 | 14 B. fiber-optic cable transmits only light (not electricity like UTP), so EMI has zero effect on it. | 14 |
| 15 How many devices can be connected to a full-duplex segment? a. 0 b. 1 c. 2 d. 4 | 15 | 15 C. Full-duplex communication requires a pint-to-point configuration because the collision-avoidance circuit is disabled. | 15 |
| 16 how many wires are used in a 100 Mbps UTP transmission? a. 2 b. 4 c. 6 d. 8 | 16 | 16 B. Both wiring standards for UTP (568A and 568B) UTILIZE ONLY PINS 1,2,3,6 | 16 |
| 17 a crossover cable is used to connect all of the following except _____ a. switch to switch b. host to host c. hub to switch d. host to switch | 17 | 17 D. all devices that are pinned the same for transmit and receive require a crossover cable to communicate directly. | 17 |
| 18 how is a T1 crossover cable crosses wired? a. pins 1,2,4,5 are connected to 4,5,1,2 b. pins 2,3,4,5 are connected to 4,5,1,2 | 18 c. pins 1,2,4,5, are connected to 3,4,5,6 d. pins 4,5,6,7 are connected to 4,5,1,2 | 18 A. A T1 cable uses T568B pairs 1,2, so to connect two T1 CSU/DSU devices back-to-back requires a crossover cable that swaps these pairs. Specifically, | 18 pins 1,2,4, and 5 are connected to 4,5,1,2, respectively |
| 19 the purpose of the demarcation point is to separate the customer from whom a. branch office b. headquarters c. data center d. service provider | 19 | 19 D. The demarcation point, or demarc, is the point at which the operational control or ownership changes from your company to a service provider. This is often | 19 at the MDF in relation to telephone connections and the CSU/DSU in regard to WAN connections |
| 20 you need to make a 568B cable for a FastEthernet link. how many pairs will you use? a.1 b.2 c.3 d.4 | 20 | 20 B. A 568B is an RJ-45 wiring standard and this type of cable uses two pairs of wires. | 20 |
| 1 why would a network administrator use plenum-rated cable during an installation? choose two. A. Low combustion temperature b. high combustion temperature c. reduces toxic gas released during a fire (of from yo ass) ... | 1 d. is not susceptible to any interference | 1 B,C. Plenum-rated means that the cables coating doesn't begin burning until a much higher temperature of heat, doesn't release as many toxic fumes as PVC when it does burn, and is rated for use in air plenums that carry breathable air, | 1 usually as non enclosed fresh-air return pathways that share space with cabling. |
| 2 which of the following Ethernet Unshielded twisted-pair cabling types are commonly used? a. 10 BaseT b. 100 BaseTX c. 1000BaseTX d. All of the above | 2 | 2 D. UTP is commonly used in twisted-pair Ethernet like 10BaseT, 100BaseTX, 1000BaseTX, etc. | 2 |