CompTIA Network+ exam Chapter 3
Which of the following Ethernet unshielded twisted-pair cabling types are commonly used?
10BaseT 100BaseTX 1000BaseTX
A company is laying out a network for high-speed data transmission. Which of the following punch down blocks should be use?
110 block
Which of the following networking components supports Ethernet network?
110 block
How many devices can be connected to a Universal Serial Bus (USB) port?
127
What are two advantages of fiber-optic cabling?
It is completely immune to EMI and RFIand can transmit up to 40 kilometers (about 25 miles).
You have planned to use a plenum-rated cable for extending your existing LAN. For which of the following reasons is plenum-rated cable used?
Its outer surface is more resistant to flame than normal cable It produces less toxic gas than normal cable in case of fire.
The purpose of the demarcation point is to separate the customer from whom?
The service provider
How many hosts on a half-duplex segment can talk at one time?
1 In half-duplex communication, a device can either send communication or receive communication, but it cannot do both at the same time.
A crossover uses which pins to make a connection?
1 to 3 and 2 to 6
568A uses which pins to make a connection?
1, 2, 3, and 6
The images here illustrate the steps for terminating a cable with an RJ-45 plug. Drag them into the proper sequence.
1. Review the cable specifications. Using the crimper or wire cutters, carefully slice open the PVC sheath without cutting the internal wires (1.2 cm-1.5 cm). 2. Spread the wires apart so that you can see the color assignments. This type of cable will always have the same color scheme for the eight wires: green, white/green, orange, white/orange, blue, white/blue, brown, white/brown. 3. Make sure that the edges of the cable are smooth, not frayed. Flatten if necessary. 4. Arrange the wires using the color code for T568A or T568B. 5. Position the wires as tightly together as possible and parallel. 6. Slide the wires into the module plug. Clip them on the bottom, wires 1 through 8, from left to right. Verify that the copper wires are fully inserted into plug, their ends covering the metallic teeth, and their casing firmly under the crimp wedge. 7. Insert the modular plug into the crimper while maintaining pressure on the cable. 8. Press hard and remove the modular plug. Verify that the casing is firmly bit and against the wall of the chamber. 9. Gently tug on the cable to verify the crimp.
How long can a Category 3 horizontal cross-connect cable be?
100 meters (328 feet) A category 3 cable, as well as category 5 and category 6, have a maximum distance of 100 meters, or 328 feet. .
How many pairs of wires does an RJ-11 connector use?
2
You need to make a 568B cable for a Fast Ethernet link. How many pairs will you use?
2 A 568B is an RJ-45 wiring standard and this type of cable uses two pairs of wires.
How many devices can be connected to a full-duplex segment?
2 Full-duplex communication requires a point-to-point configuration because the collision-avoidance circuit is disabled.
How many wires are used in a 100Mbps UTP transmission?
4 Both wiring standards for UTP (568A and 568B) utilize only pins 1, 2, 3, and 6.
568A vs 568B
568A Pin 8: Brown Pin 7: Brown / White Pin 6: Orange Pin 5: Blue / White Pin 4: Blue Pin 3: Orange / White Pin 2: Green Pin 1: Green / White 568B Pin 8: Brown Pin 7: Brown / White Pin 6: Green Pin 5: Blue / White Pin 4: Blue Pin 3: Green / White Pin 2: Orange Pin 1: Orange / White
Which of the following devices is considered as a legacy device used in the telephony system?
66 block
Identify the joystick connector in the image.
A joystick connector is a 15-pin two row female connector used to connect a joystick to a computer. Joystick connectors are found on sound cards.
You work as a Network Administrator for Tech Perfect Inc. The company has a TCP/IP-based routed network that is configured on Cisco devices. The network is configured as shown in the figure below: The types of cable used in networking are listed below: # Types of cable 1 UTP straight-through 2 UTP crossover 3 UTP rollover 4 Serial Which of the following options is correct regarding the types of cable used for connecting different networking devices on the network?
A-3, B-1, C-1, D-4
APC vs UPC
Angle-polished connectors (APCs): 8 degrees angled polish Light is reflected into the cladding Return Loss = - 65dB Ideal for video and single-fiber applications Ultra-polished connectors (UPCs): UPC polish Light is reflected back down the core Return Loss = 55dB Adequate for most applications
The pin-outs in an RJ-45 Connector, T568B standard
Brown Brown / White Green Blue / White Blue Green / White Orange Orange / White
Which of the following statements are true about a CAT5 cable?
Capable of transferring data at 100Mbps Has three twists per inch of each twisted pair Uses a 24-gauge copper wire Cat 5 cable is a twisted pair high signal integrity cable type. Most cables of this type are unshielded, but some are shielded, used for high signal integrity. These cables can transfer data at speeds of 100 Megabits per second. So, these cables typically have three twists per inch of each twisted pair of 24 gauge copper wires within it. The twisting of the cable can reduce electrical interference and crosstalk. These cables are used in structured cabling for computer networks, such as Fast Ethernet.
You need to connect two devices on a network and they need to send voice traffic. Which of the following cable will you use?
Cat 5 To connect two devices for voice on a vertical connect, the minimum cable you can use is Category 5E.
Which of the following types of patch cable is used in a 100BASET network?
Cat 5 UTP
Which UTP uses four twisted wire pairs (eight wires), is rated for 100MHz, and is capable of handling the disturbance on each pair caused by transmitting on all four pairs at the same time?
Category 5e
Which UTP wiring uses four twisted wire pairs (eight wires) and is rated for 250MHz?
Category 6
In which of the following categories is UTP cable not rated?
Category 8 Unshielded twisted-pair has standards from Category 2 through 6 for use on Ethernet networks. There is no Category 8 defined.
Straight-Through Cable
Connect a host to a switch or hub or a router to a switch or hub.
Connect a workstation named "Front Office" to the Ethernet and to the Internet. Here's what you need to do: Use the appropriate twisted pair cable to make a connection between "Front Office" on the patch panel and port 4 on the switch. Connect the computer to the local area network using the appropriate twisted pair cable. Open the monitor screen to confirm that the workstation is properly connected to the local area network and to the Internet.
Connect the Ethernet cables to the networking closet and computer. × From the Cables category, select the Ethernet twisted pair cable for Networking Closet. × On the Networking Closet Front tab, insert one end of the RJ-45 cable connector into the Front Office port on the patch panel. Insert the other end into port 4 in the lower row of the 16-port Ethernet switch. × Go to the back view of the Computer tab. × Select an RJ-45 cable, insert one end into the Ethernet port on the computer, and then insert the other end into the Ethernet port on the wall outlet. Open Windows 7 to verify the LAN connection. show step × To confirm that the workstation has a connection to the local network and the Internet, click the Windows icon on the monitor. Note that the LAN icon appears on the taskbar.
Crossover Cable
Connect these devices: Switch to switch Hub to hub Host to host Hub to switch Router direct to host 1 ---> 3 2 ---> 6 3 ---> 1 6 ---> 2
In the figure, identify each component of the coaxial cable by selecting its name from the list.
Copper wire Inner dielectric insulation Thin foil shield Braided shield Outer plastic cover
In an Ethernet peer-to-peer network, which of the following cables is used to connect two computers using RJ-45 connectors and Category 5 UTP cable?
Crossover
Which type of cable will you use to connect two switches to each other?
Crossover
What type of cable will you use to connect a hub to a switch such that it does not create congestion?
Crossover Cable
Which of the following is described in the statement below? "It is used to connect one Personal Computer (PC) to another without using a hub or a switch."
Crossover cable
You work as a Network Administrator for Tech Perfect Inc. The company has a TCP/IP-based network. Two departments, Sales and Marketing, have separate networks. All network components are centrally connected to a hub in their respective departments. Management wants to connect both the departments. Which of the following cables will you use to connect both hubs?
Crossover cable
The point at which the operational control or ownership changes from your company to a service provider is referred to as ________.
Demarcation point, or demarc
Which of the following statements are true about a UTP crossover cable with RJ-45 connectors?
Establishes a connection between a broadband modem and a PC/router Establishes a connection between two PCs without a hub
Drag the images of the fiber connectors onto their matching names.
FDDI Connector: Has two 2.5 mm ferrules with a fixed shroud covering the ferrules. The connectors snap in and are generally used to connect a network to a wall connection. Opti-Jack Connector: Has two ST-type ferrules in a fixed shroud. The connectors snap in and have both male and female ends. Volition Connector: A 3M product that does not use a ferrule. Instead, you align fibers in a V-grove like a splice. It snaps in and has both male and female ends. MT-RJ Connector: Mechanical Transfer Registered Jack connectors are duplex connectors with both fibers in a single ferrule. They have male and female (plug and jack) connections, snap in, and use pins for alignment.
On which type of cable does EMI have the least effect?
Fiber-optic
What type of cable transmits lights from end to end?
Fiber-optic
Which of the following cables offers the best resistance to crosstalk?
Fiber-optic
Which of the following cables offers the highest resistance to EMI?
Fiber-optic
You work as a Network Administrator for McRobert Inc. The company's branch office is approximately 1.5 miles away from its main office. You want to connect the branch office to the main office network without using repeaters. Which of the following cables will you use?
Fiber-optic
You work as a Network Administrator for Net World International. The Sales office and head office of the company are located in different buildings. You want to connect the Sales office network to the Head office network. The company's management is concerned about the electromagnetic interference (EMI) in the surrounding locality. Which of the following cables will you use?
Fiber-optic
What type of cable should be used if you need to make a cable run longer than 100 meters?
Fiber-optic 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.
What advantage does a CAT5 cable have over a fiber-optic cable?
Flexibility
Why would a network administrator use plenum-rated cable during an installation? (Choose two.)
High combustion temperature Reduces toxic gas released during a fire Plenum-rated means that the cable's 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, usually as nonenclosed fresh-air return pathways that share space with cabling.
A crossover cable is used to connect all of the following except ________.
Host to switch All devices that are pinned the same for transmit and receive require a crossover cable to communicate directly.
Which of the following devices is used for extending a data circuit to the new area of the same office premises?
Intermediate distribution frame (IDF)
Drag the components onto their matching descriptions.
MDF ==> A wiring point used as a reference point for telephone lines 25 pair ==> A feeder cable that supplies signal to many connected pairs 110 Block ==> A newer type of wiring distribution point used for computer networking Smart Jack ==> A special network interface used between the service provider's network and the internal network
You are designing a TCP/IP-based network for SoftTech Inc. The company wants to use Small Form Factor (SFF) fiber-optic cables for the backbone of its network. Which of the following connectors can be used?
MT-RJ LC connector
Identify the MT-RJ connector in the figure given below.
MT-RJ: It is less than half the size of the SC duplex connector and transceiver, so it doubles the port density of fiber-optic LAN equipment. The connector is a 2-fiber connector and takes up no more room than an RJ-45 jack. Fiber-LC: Developed to meet the need for small and easier-to-use fiber optic connectors. It reduces space required on panels by 50%. RJ-45: A type of connector similar to an RJ-11 telephone connector, but it is larger in size because it has eight conductors. The unshielded twisted-pair (UTP) and shielded twisted-pair (STP) connections use RJ-45 connectors in computer networks.
Which of the following networking components will you install first for creating a new network?
Main Distribution Frame (MDF)
What is the main difference between single-mode fiber (SMF) and multimode fiber (MMF)?
Number of light rays
Benefits of the MT-RJ fiber-optic connector
Only one-third the size of the SC and ST connectors Small size TX and RX strands in one connector Keyed for single polarity Pre-terminated ends that require no polishing or epoxy Easy to use
How is a T1 crossover cable wired?
Pins 1, 2, 4, and 5 are connected to 4, 5, 1, and 2
Pros and cons of Fiber-Optic cable
Pros: It's completely immune to EMI and RFI. It can transmit up to 40 kilometers (about 25 miles). Cons: It's difficult to install. It's more expensive than twisted-pair. Troubleshooting equipment is more expensive than twisted-pair test equipment. It's harder to troubleshoot.
Different types of coaxial cable
RG rating ==> RG-58 U Popular name ==> N/A Ethernet implementation ==> None Type of cable ==> Solid copper RG rating ==> RG-58 A/U Popular name ==> Thinnet Ethernet implementation ==> 10Base2 Type of cable ==> Stranded copper RG rating ==> RG-8 Popular name ==> Thicknet Ethernet implementation ==> 10Base5 Type of cable ==> Solid copper RG rating ==> RG-59 Popular name ==> Cable television Low cost, short distance Ethernet implementation ==> N/A Type of cable ==> Solid copper RG rating ==> RG-6 Popular name ==> Cable television, cable modems Longer distances than RG-59; some power implementations Ethernet implementation ==> N/A Type of cable ==> Solid copper RG rating ==> RG-62 Popular name ==> ARCnet (obsolete) Ethernet implementation ==> N/A Type of cable ==> Solid/stranded
In which of the following coaxial cables is implementation of Ethernet not applicable?
RG-59 RG-6 RG rating ==> RG-58 U Popular name ==> N/A Ethernet implementation ==> None Type of cable ==> Solid copper RG rating ==> RG-58 A/U Popular name ==> Thinnet Ethernet implementation ==> 10Base2 Type of cable ==> Stranded copper RG rating ==> RG-8 Popular name ==> Thicknet Ethernet implementation ==> 10Base5 Type of cable ==> Solid copper RG rating ==> RG-59 Popular name ==> Cable television Low cost, short distance Ethernet implementation ==> N/A Type of cable ==> Solid copper RG rating ==> RG-6 Popular name ==> Cable television, cable modems Longer distances than RG-59; some power implementations Ethernet implementation ==> N/A Type of cable ==> Solid copper RG rating ==> RG-62 Popular name ==> ARCnet (obsolete) Ethernet implementation ==> N/A Type of cable ==> Solid/stranded
Which RG rating of coax is used for cable modems?
RG-6
Drag the RG standard items to match them with their uses.
RG-6/U: Cable and satellite television, cable modems RG-6/UQ: Quad-four layers of shielding RG-8/U: Thicknet network backbones, amateur radio RG-9/U: Thicknet network backbones RG-11/U: Long drops and underground RG-58/U: Thin Ethernet, radio, amateur radio RG-59/U: Baseband video in closed-circuit television, cable television
Which of the following connectors is used by the UTP cable network?
RJ-45
Which of the following connectors is used with the Category 5 UTP cable?
RJ-45
What type of connector does UTP cable typically use?
RJ-45 UTP usually connects with RJ-45. You use a crimper to attach an RJ connector to a cable.
Click to mark the RJ-45 connector in the figure.
RJ-45: A standard type of connector commonly used for Ethernet networking. RJ11: Uses 6P2C (six-position two-conductor) modular plug and jack, and is used for a single telephone line. Coaxial: Cable with a solid copper center conductor surrounded by a non-conductive dielectric insulating material. It is often used for media transfer. HDMI (High-Definition Multimedia Interface): Delivers video signals in a digital format without analog conversion, using the TMDS (Transition Minimized Differential Signaling) protocol. VGA (Video Graphics Array): Transmits video signals from the system to a monitor. USB (Universal Serial Bus): A bidirectional serial interface that's widely used to connect peripheral devices to computers (such as game controllers, cameras, scanners, and other input devices).
You've installed a small network at an accounting office. All the computers have gigabit Ethernet NICs. Your router works at 1000 Mbps. Yet, when you measure the Internet speed, you see it is at a max of 100 Mbps. What should you do to fix this?
Replace the cable with a Category 6 cable.
Which of the following connector types has a push-pull latching mechanism?
SC
Which of the following connectors are used with fiber-optic cables?
SC ST MT-RJ
Which of the following are fiber-optic connectors? (Select three.)
ST SC LC
Identify the ST connector in the figure below.
ST: A fiber-optic connector used with multimode fiber that has a 2.5mm shaft and bayonet locking ring, and allows quick connect and disconnect of 125 micron multi-mode fiber.
Which of the following types of cables use an RJ-45 connector?
STP UTP
Media Converters
Single-Mode Fiber to Ethernet: These devices accept a fiber connector and an Ethernet connector and convert the signal from Ethernet and single-mode fiber. Multimode Fiber to Ethernet: These devices accept a fiber connector and an Ethernet connector and convert the signal from Ethernet and multi-mode fiber. Fiber to Coaxial: These devices accept a fiber connector and a coaxial connector and convert digital signals from optical to coax. Single-Mode to Multimode Fiber: These devices accept a single-mode fiber connector and a multimode fiber connector and convert the signals between the two
Which of the following provides the longest cable run distance?
Single-mode fiber
What are the benefits of using USB 2.0 over legacy communication ports, such as RS-232 and parallel ports?
Speed Expansion Easy configuration of hardware devices
Which of the following cables is used for DTE-to-DCE connections?
Straight-through
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?
Straight-through
You want to connect a host to a switch port. What type of Ethernet cable will you use?
Straight-through
Fiber-Optic Connectors
The two most popular are the straight tip (ST) and subscriber or square connector (SC). The ST fiber-optic connector (developed by AT&T) is one of the most widely used fiber-optic connectors; it uses a BNC attachment mechanism similar to thinnet's that makes connections and disconnections fairly frustration free. In fact, this is the feature that makes this connector so popular. The SC connector is another type of fiber-optic connector. SC connectors are latched—a mechanism holds the connector in securely and prevents it from falling out. SC connectors work with both single-mode and multimode optical fibers and will last for around 1,000 matings. They're being used more now but still aren't nearly as popular as ST connectors for LAN connections. Another type of connector is the FC connector, or field assembly connector, also called the ferrule connector, which isn't very popular. It's still used in telecommunications and measurement equipment with single-mode lasers, but the SC is a way more popular fiber end, other than that you probably won't ever see it in production. These look identical to ST connectors.
You have two desktop computers having 100Base-T Ethernet network cards. You want to connect the computers with a cable without using a hub or switch. Drag the appropriate cable from the bottom required for the connection onto the box provided on the top.
To connect the two computers having 100Base-T Ethernet network cards without using a hub or switch, you will use the CAT5 crossover cable
In what instance would you use T1 crossover cable?
To connect two CSU/DSUs
Fiber-optic cable is immune to electromagnetic interference (EMI) and radio frequency interference (RFI) because it
Transmits digital signals using light impulses Fiber-optic cable transmits digital signals using light impulses rather than electricity; therefore, it is immune to EMI and RFI.
Which of the following cabling options is used by the 10BASET standard?
Twisted pair
Which of the following are serial interfaces?
USB FireWire There are three types of serial interfaces: Standard, Universal Serial Bus (USB), and FireWire. IEEE 1394 is a high-speed serial bus that provides enhanced PC connectivity to a wide range of devices. These devices include consumer audiovisual components, traditional PC storage devices, and handheld devices. IEEE 1394 is also known as FireWire. Universal Serial Bus (USB) is a new serial interface, used to connect devices to a computer. Answer option D is incorrect. Institute of Electrical and Electronics Engineers (IEEE) 1284 is a specification of a printer cable used to take advantage of bi-directional printing. Typically, bi-directional cables have the number 1284 printed on them. Answer option EPP is incorrect. Enhanced Parallel Port (EPP) is a type of parallel port, which gives highspeed performance throughput for printers.
You work as a Network Technician for Tech Perfect Inc. A service provider has set up its smart jack outside the company premises. You find that your company's CPE is around 50 meters away from the smart jack. Which of the following steps will you take to complete the networking?
Use demarc extension.
Which of the following statements are true regarding plenum-rated cables?
Used in an enclosed environment Often coated with Teflon Produce less toxic gas than normal cables in case of fire
Which of the following statements are true about fiber-optic cables?
Uses light pulses for signal transmission Immune to electromagnetic interference (EMI) Transmits signals over great distances
The punch down tool is used to connect a network cable to _______.
a 110 block
