B.3.2 N10-007 Domain 2: Infrastructure
What is the minimum cable specification that supports 1000 Mbps Ethernet? Cat 3 Cat 4 Cat 5 Cat 5e Cat 6 Cat 7
1000 Mbps Ethernet (Gigabit Ethernet) requires at least Cat 5e cables. Cat 3 and Cat 4 only support 10 Mbps Ethernet. Cat 5 cable only supports up to 100 Mbps. Cat 6 or Cat 7 is required for bandwidth up to 10 Gbps Ethernet.
Which Gigabit Ethernet standard can support long network segments up to a maximum of 5 km when used with single-mode fiber optic cable? 1000BaseCX 1000BaseSX 1000BaseT 1000BaseLX
1000BaseLX supports segment lengths of up to 5 km when used with single-mode fiber optic cable. This maximum segment length is cut to 550 m when multimode fiber optic cable is used.
Which of the following Ethernet standards uses fiber-optic cabling? (Select two.) 1000BaseCX 100BaseT4 100BaseFX 100BaseTX 1000BaseLX
100BaseFX and 1000BaseLX are Ethernet standards that use fiber optic cabling
Your network follows the 100BaseFX specifications for Fast Ethernet and uses half-duplex multi-mode cable. What is the maximum cable segment length allowed? 100 meters 412 meters 550 meters 1,000 meters 2,000 meters
100BaseFX half-duplex multimode cable has a maximum segment length of 412 meters. 1000BaseSX and 1000BaseLX support multimode cable up to 550 meters. 10BaseFL supports fiber optic cable between 1,000 and 2,000 meters.
What topology is used with 100BaseTX Fast Ethernet networks? (Select two.) Physical star/logical bus Physical star/logical ring Physical star/logical star Physical ring/logical star
100BaseTX Fast Ethernet networks use a physical star/logical bus topology when a hub is used or a physical star/logical star when a switch is used.
Your client needs to implement a very high-speed network backbone between campus buildings, some of which are around 300 meters apart. Multi-mode fiber optic cabling has already been installed between buildings. Your client has asked that you use the existing cabling. Which Ethernet standard meets these guidelines? (Choose two.) 10GBaseER 1000BaseT 1000BaseSX 10GBaseSR 10BaseFL 1000BaseCX
10GBaseSR and 1000BaseSX can operate within these parameters. Both will support segment lengths 300 meters long and can use multi-mode fiber optic cabling.
You are working with an older 10Base2 Ethernet network. Which of the following connector types will you most likely encounter? BNC F-Type ST RJ11
A 10Base2 Ethernet network (also called a Thinnet) is an older type of network that uses coaxial cables with BNC connectors for communication.
Which of the following uses metal clips placed over plastic slots to connect individual copper wires? 25 pair 100 pair 110 block 66 block
A 110 block is a punch down block that uses metal clips fitted over plastic pins. To connect wires using a 110 block, place the wires in the plastic slots, attach the metal clip, then punch down the connecting cable on the top of the clip.
What tool should you use to extend network services beyond the demarc? Crimper Tone generator Punch down tool Media certifier
A demarc is the location where the local network ends and the telephone company's network begins. This location is usually at a punch down block in a wiring closet. You use a punch down tool to attach wires to the punch down block.
You have a second wiring closet on the main floor. You need to connect the two wiring closets. Which of the following are typically used to connect the two wiring closets? (Select two. Smart jack Demarc extension Horizontal cross connect 25 pair Vertical cross connect
A horizontal cross connect joins wiring closets on the same floor. 25 pair or 100 pair wiring punched down into 66 or 110 blocks are often used to connect the wiring closets together.
At which OSI model layer does a media converter operate? Layer 1 Layer 2 Layer 3 Layer 4
A media converter operates at Layer 1 of the OSI model, the Physical Layer. The media converter translates frames into bits and transmits them on the transmission medium.
Which of the following is used to terminate individual wires from a 25 pair or 100 pair cable using female RJ45 ports? Horizontal cross connect 66 block 110 block Patch panel
A patch panel is a device that typically connects individual stranded wires into female RJ45 connectors. For example, you might connect 4 pairs of wires from a punch down block to a port on the patch panel. On the patch panel, you then connect drop cables (cables with RJ45 connectors) to the patch panel on one end and a computer on the other end.
Which of the following standards is typically used in a rollover cable? RG58 RG6 RJ11 RS232
A rollover cable has a serial connector on one end and an RJ45 connector on the other end. RS232 is the standard for serial communications.
You inspect the existing fiber cable and determine that it uses LC connectors. You also notice the cable's ferrule has a slight slant to it. Which polish grade should you use to replace the existing cable? Flat Physical Contact polish Ultra Physical Contact polish Physical Contact polish Angled Physical Contact polish
A slight slant to the fiber ferrule indicates an Angled Physical Contact (APC) polish. Using a non-angled connector will cause excessive insertion loss.
Which device sends signals from a computer onto a network? Cable Router Gateway Transceiver
A transceiver (short for transmitter/receiver) sends signals to and receives signals from the network. It translates the parallel data stream of the computer to the serial data stream of the network and vice versa. Most transceivers are now built into network interface cards (NICs).
Which type of polish grade uses green-colored connectors to help you keep from using the wrong connector type? Physical Contact (PC) Angled Physical Contact (APC) Super Physical Contact (SPC) Ultra Physical Contact (UPC)
Angled Physical Contact (APC) connecters are colored green to differentiate them from non-APC connectors.
Which of the following cable types often includes a solid plastic core that keeps the twisted pairs separated? Cat 5 Cat 6 Cat 3 Cat 5e
Cat 6 cables include a solid plastic core that keeps the twisted pairs separated and prevents the cable from being bent too tightly.
What type of cabling is used with 100BaseTX Fast Ethernet networks? Cat5 or higher Fiber optic Cat3 Cat4
Cat5 Ethernet cable or higher can be used with 100BaseTX Fast Ethernet networks.
Which of the following are characteristics of coaxial network cable? (Select three.) -It is composed of four pairs of 22-gauge copper wire. -It uses two concentric metallic conductors. -The conductors within the cable are twisted around each other to eliminate cross-talk. -The ends of the cable must be terminated. -It has a conductor made from copper in the center of the cable.
Coaxial cable is composed of a central copper conductor surrounded by an insulator, which is then surrounded by a second metallic mesh conductor. The name coaxial is derived from the fact that both of these conductors share a common axis. Both ends of a coaxial cable must be terminated.
Which of the following cables offers the best protection against EMI? RG-6 Cat 5 Cat 6a Cat 5e
Coaxial cable offers better protection against EMI than twisted pair cables. Coaxial cable has a mesh conductor, which provides a ground and protects against EMI.
You manage the two-location network shown in the exhibit. Workstations and servers at each location connect to a patch panel using behind-the-wall wiring. The patch panel then connects network hosts to one of three 1000BASE-T switches. Routers are implemented at each location to connect the two networks together using a private WAN. The switch ports have auto-MDIX disabled.
Drop cables = Cat 6 straight-through UTP. Patch cables = Cat 6 straight-through UTP. Uplink cables = Cat 6 crossover UTP (Cat 6 straight-through UTP can be used instead if auto-MDIX is enabled on the switch ports). WAN cable = Single-mode fiber optic.
Ethernet 100BaseFX networks use what type of cabling? Unshielded twisted pair Shielded twisted pair Coaxial Fiber optic
Ethernet 100BaseFX networks use fiber optic cabling
F-type connectors are typically used with which of the following cable standards? (Select two.) Cat 5e Cat 5 RG-6 RG-59 RG-58 Cat 6a
F-type connectors are used with coaxial cable. They are typically used for cable TV and satellite installations using RG-6 or RG-59 cables.
Your network follows the 100BaseTX specifications for Fast Ethernet. What is the maximum cable segment length allowed? 2,000 meters 412 meters 100 meters 500 meters 1,000 meters
Fast Ethernet using twisted pair cables (either 100BaseT4 or 100BaseTX) has a maximum cable segment length of 100 meters. All Ethernet networks that use twisted pair cable (Ethernet, Fast Ethernet, Gigabit Ethernet) have a distance limitation of 100 meters
You would like to implement 10 Gbps Ethernet over a distance of 1 kilometer or greater. Which of the following would be the minimum requirement for the implementation? Single-mode fiber 10GBaseER standards 10GBaseSR standards 10GBaseLR standards
For 10 Gbps at distances up to 10 kilometers, use 10GBaseLR with single-mode fiber.
Which pins in an RJ45 connector are used to transmit data when used on a 100BaseT Ethernet network? (Select two.) Pin 1 Pin 2 Pin 3 Pin 4
For a 100BaseT cable, Pins 1 and 2 are used to transmit data; pins 3 and 6 are used to receive data.
Which of the following are requirements of the 1000BaseT Ethernet standards? (Select three.) RJ45 connectors The cable length must be less than or equal to 100m SC or ST connectors Cat 5e cabling
Gigabit Ethernet (1000BaseT) has similar requirements to 100BaseT: RJ45 connectors The cable length must be less than or equal to 100 Cat 5e cabling
Which type of optical fiber is normally used to connect two buildings that are several kilometers apart? Dual-mode Single-mode Multi-mode Fibre Channel mod
In this scenario, you would use single-mode fiber optic cables. Fiber optic is graded as single-mode or multi-mode. Single-mode consists of a single very thin core, which produces fewer reflections. This provides greater effective bandwidth over greater distances
Which of the following connectors are used with fiber optic cables and include both cables in a single connector? (Select two.) BNC LC SC MTRJ
LC and MTRJ connectors have both fiber optic cables in a single connector.
Which of the following are characteristics of an LC fiber optic connector? (Choose two.) +They can be used with either fiber optic or copper cabling. +They are half the size of standard connectors. +They are threaded. +They use a one-piece bayonet connecting system. +They use a housing and latch system similar to an RJ45 UTP connector.
LC fiber optic connectors are small, about half the size of other fiber optic connectors. Their appearance is similar to a typical RJ45 connector used with UTP wiring. Like an RJ45 connector, an LC fiber optic connector uses a small latch to lock the connector in a jack.
Which of the following are characteristics of an MTRJ fiber optic connector? (Select two.) +They use metal guide pins to ensure accurate alignment. +They must never be used with single-mode fiber-optic cables. +They use a keyed bayonet. +They can be used with multi-mode fiber optic cables
MTRJ connectors can be used with either multi-mode or single-mode fiber optic cabling. The connector is made from plastic and uses metal guide pins to ensure that it is properly aligned in the jack.
You want a switch to have the ability to modify the media type the switch port supports. Which type of module might you use to make this possible? MPLS GBIC SFP OC-x
Older network adapters used an external transceiver that matched the media type. While nearly all current network adapters come with a built-in transceiver type, new devices, such as switches and routers, use transceiver modules that allow you to modify the media type of a port by changing the transceiver. There are several types of transceiver modules. A GBIC (gigabit interface converter) is a large transceiver that fits in a port slot. GBICs are used for Gigabit media, including copper and fiber optic. An SFP (small form-factor pluggable) is similar to a GBIC, but is smaller in size. An SFP is sometimes called a mini-GBIC. An XFP transceiver is similar in size to an SFP, but is used for 10-Gigabit networking.
You have a small home network connected to the internet using an RG-6 cable. You need to move the router connecting the network to the internet, but can't find any RG-6 cable. Which cable types could you use instead? RG-58 RG-59 Cat 5e Cat 3
RG-6 has an impedance rating of 75 ohms. It is important to use coaxial cables with the same impedance rating. Only RG-59 is rated for 75 ohms
Which of the following is true about single-mode fiber optic network cabling? +The central core is smaller than standard multi-mode fiber optic cabling core.
Single-mode fiber optic cabling provides one path (or mode) for the light to travel. It supports longer transmission distances than multi-mode fiber optic cable, and it's also more expensive. Single-mode cabling also has a central core that is much smaller than standard multi-mode fiber optic cabling core.
You have been tasked with designing a high-speed Ethernet network. Your client's building already has 150-ohm shielded twisted pair (STP) wiring installed. Which Ethernet standard could you implement in this situation? 1000BaseT 1000BaseSX 10BaseFL 1000BaseCX
The 1000BaseCX standard specifies 150-ohm STP cabling. The maximum cable length is 25 meters
Which Gigabit Ethernet standard uses multimode fiber optic cabling and supports network segments up to a maximum of 550 meters long? 1000BaseZX 1000BaseCX 1000BaseT 1000BaseSX
The 1000BaseSX standard uses multimode fiber optic cable with a maximum segment length of 550 meters.
Which of the following connector types would you most likely use to connect to a T1 WAN service? RJ11 GG45 RJ45 RJ48c
The RJ48c connector is similar to an RJ45 connector, but has different pin-outs. RJ48c connectors are commonly used for T1 WAN connections.
Which of the following connectors is used with fiber optic cables and requires that you use a twisting motion to connect it? LC BNC ST SC F-type
The ST connector is used with fiber optic cable and uses a twist-type connector. To remember the difference between ST and SC connectors, use the mnemonics Set-and-Twist and Set-and-Click.
You want to use the T568A standard to add connectors to your Cat5 cable. Starting with pin 1, which order should you use for the wires within the connector? +White/green, green, white/orange, blue, white/blue, orange, white/brown, brown +White/blue, blue, white/orange, orange, white/green, green, white/brown, brown
The T568A standard uses the following order of wires in the connector: White/green, green, white/orange, blue, white/blue, orange, white/brown, brown.
You want to use the T568B standard for adding connectors to your Cat5 cable. Starting with pin 1, which order should you use for the wires within the connector? +White/green, green, white/orange, blue, white/blue, orange, white/brown, brown +White/orange, orange, white/green, blue, white/blue, green, white/brown, brown
The T568B standard uses the following order of wires in the connector: white/orange, orange, white/green, blue, white/blue, green, white/brown, brown.
You've connected a cable certifier to an RJ45 wall jack, and the output shown below is displayed on the device. What does this output indicate? The cable is functioning correctly. This is a straight-through cable. This is a crossover cable. There are multiple shorts on this cable. There are multiple open pins on this cable.
The cable is functioning correctly. This is a crossover cable.
Which of the following connectors usually require polishing as part of the assembly process? (Select two.) F-type ST BNC SC RJ45
The fiber optic cable assembly process is more complex than other assemblies. It is necessary to polish the exposed fiber tip to ensure that light is passed from one cable to the next with minimal dispersion.
Due to the size of the buildings and the distance between them, you have elected to use 10BaseFL hubs, cabling, and network interface cards. What is the maximum length for the network cable between a workstation and a hub? 100 meters 1000 meters 2000 meters 412 meters
The maximum length for a 10BaseFL network segment is 2000 meters (2 km).
The ISP's cable modem has only one RJ45 port.. Computers need to have a gigabit connection to the network. New devices should not require management or configuration. You examine each computer and notice only one of the four computers has a wireless NIC; they all have Ethernet NICs. What should you purchase? A new cable modem with a built-in switch and CAT 6a cabling. An unmanaged switch and CAT 5e cabling. A managed switch and CAT 6 cabling.
Unmanaged switches are autonomous in their function, requiring no port management or configuration. CAT 5e cabling supports transfer speeds up to 1000 Mbps.
You are connecting Cat 5e cables to a 110 block. What order should you connect the wires in to follow standard wiring conventions? White/blue, blue, white/orange, orange, white/green, green, white/brown, brown
Use BLOG (blue-orange-green) to remember the wire order, and remember to start with the white striped wire first.
You are making Ethernet drop cables using Cat5e cable and RJ45 connectors. You need to remove the plastic coating over the cable to expose the individual wires. Which tool should you use? Snips Cable stripper Needle nose pliers Punch down tool
Use a cable stripper to remove the plastic jacket or sheath for a cable. When making drop cables or using punch down blocks, do not remove the plastic covering for individual wires.
You are troubleshooting a connectivity problem in which one client system is unable to connect to a server. Both the server and client system are connected to the same Ethernet network switch. No other users have complained of a problem, and you suspect that faulty network cabling might be to blame. Which of the following troubleshooting steps are you most likely to perform first? +Use a cable tester to test the cable between the computer system and the network switch. +Use a cable tester to test the cable between the network switch and the server system.
Use a cable tester to test the cable between the computer system and the network switch.
You are working with 25 pair wires and 66 blocks. You have pushed the wires onto the 66 block, but now you need to cut off the excess end of each wire. Which tool should you use? Punch down tool Cable stripper Needle nose pliers Snips
Use a punch down tool to push wires into 66 or 110 blocks and cut wires at the same time. The punch down tool has a blade on one side that cuts off the excess wires.
You need to connect a workstation to a switch using a regular port on the switch (not an uplink port). The switch does not support auto-MDI. Which type of cable should you use? Loopback Straight-through Crossover Rollover
Use a straight-through cable to connect a workstation or router to a regular switch port.
You have just signed up for a broadband home internet service that uses coaxial cable. Which connector type will you most likely use? BNC RJ45 F-type SC ST RJ11
Use an F-type connector for broadband cable connections that use coaxial cable.
Consider the 850 nm multimode fiber optic cable shown below. How much loss can you expect between the transmitter and the receiver? -1.2 dB
When calculating a loss budget for a segment of fiber optic cable, use the following guidelines: Connectors = 0.3 dB loss each Splices = 0.3 dB loss each Multimode cabling = 3 dB loss per 1000 meters (850 nm) or 1 dB loss per 1000 meters (1300 nm) Single mode cabling = 0.5 dB loss per 1000 meters (1310 nm) or 0.4 dB loss per 1000 meters (1550 nm) In this scenario, there are two connectors (0.3 dB loss each) and 200 meters of 850 nm multimode cable (.2 * 3 dB) for a total expected loss of 1.2 dB.
You are preparing to attach wires in a 110 block. You want to connect the wires and trim off the excess at the same time. Which of the following should you do? Use a punch down tool with a notched blade. Point the cut side of the tool towards the wire end.
When using a punch down tool, choose the right blade for the job: Use a notched blade for a 110 block. Use a straight blade for a 66 block. For both blade types, you can use the end without a cutting blade if you want to punch down without cutting the wire. When using the cutting blade, point the cut side of the punch down tool towards the wire end that you want to trim.
Which recommendation should you follow while using 110 blocks for connecting Cat 5 and higher data cables? Connect wires using the T568B standard. Connect wires using the T568A standard. Keep wire pairs twisted up to within one-half of an inch of the connector. Use C-5 connectors.
While using Cat5 (or higher) wiring, preserve the twists in each wire pair to within one-half of an inch of the connecting block.
You are building network cables and attaching RJ45 connectors to each end. Which tool do you need for this task? Punch down tool Crimping tool Wire puller Needle nose pliers
You should use a crimping tool designed for RJ45 connectors to attach connectors to UTP cable.