Chapter 5: Networking Fundamentals Flashcards
____________________ is immune to electromagnetic or radio‐frequency interference.
Twisted pair cabling
CSMA/CD
Broadband coaxial cabling
Fiber‐optic cabling
Fiber‐optic cabling
Companies that want to ensure the safety and integrity of their data should use fiber‐optic cable because it is not affected by electromagnetic or radio‐frequency interference. Even though some copper cables have shielding, they are not immune to EMI or RFI. This eliminates twisted pair and coaxial. CSMA/CD is an access method, not a cable type.
Which of the following is a type of connector used with coaxial cable?
RJ‐11
RJ‐45
F type
SC
F type
Coaxial cable can use BNC connectors and F type connectors. RJ‐11 and RJ‐45 are twisted pair connectors. SC is a fiber‐optic connector.
You need to put a connector on the end of an Ethernet crossover cable. The existing end has a white and green colored wire at pin 1. What color do you need to make pin 1 on the new end?
White/green
Green
White/orange
Orange
White/orange
A crossover cable will flip pins 1 and 3 on each end. Therefore, this end needs to have the white/orange wire as pin 1. The correct order for this cable should be white/orange, orange, white/green, blue, white/blue, green, white/brown, brown.
___________________ is the type of media access method used by NICs that listen to or sense the cable to check for traffic and send only when they hear that no one else is transmitting.
T568A/T568B
CSMA/CD
CSMA/CA
Demand priority
CSMA/CD
Carrier Sense Multiple Access with Collision Detection (CSMA/CD) specifies that the NIC pause before transmitting a packet to ensure that the line is not being used. If no activity is detected, then it transmits the packet. If activity is detected, it waits until it is clear. In the case of two NICs transmitting at the same time (a collision), both NICs pause to detect and then retransmit the data. CSMA/CA listens to the line as well but tries to avoid collisions. T568A/T568B are twisted pair wiring standards. Demand priority is a media access method, but we didn’t discuss it at all in the chapter as it’s not related to the A+ exam. It’s used with a standard called 100BaseVG.
What is the lowest grade of UTP that is rated for 100 Mbps transmission?
Cat 5
Cat 5e
Cat 6
Cat 6a
Cat 5
Cat 5 was the first UTP standard ratified for 100 Mbps transmissions. Before that, Cat 3 was popular but only supported 10 Mbps. Cat 5e, Cat 6, and Cat 6a all support at least 1 Gbps and came after Cat 5.
A physical star topology consists of several workstations that branch off a central device called a ____________________.
NIC
Bridge
Router
Hub
Hub
A hub or a switch is at the center of a star topology. A NIC is a network card, which each computer must have to be on the network. Bridges and routers are higher‐level connectivity devices that connect network segments or separate networks together.
Of all the network cabling options, ___________________ offers the longest possible segment length.
Unshielded twisted pair
Coaxial
Fiber‐optic
Shielded twisted pair
Fiber‐optic
Fiber‐optic cable can span distances of several kilometers because it has much lower attenuation, crosstalk, and interference as compared to copper cables.
What devices transfer packets across multiple networks and use tables to store network addresses to determine the best destination?
Routers
Firewalls
Hubs
Switches
Routers
Routers are designed to route (transfer) packets across networks. They are able to do this routing, determining the best path to take, based on the internal routing tables that they maintain.
Which of the following networking hardware devices is capable of creating VLANs?
Firewall
Patch panel
Unmanaged switch
Managed switch
Managed switch
A managed switch can create virtual LANs (VLANs) using its management software. A firewall is a hardware or software solution that serves as your network’s security guard. Patch panels and unmanaged switches cannot create VLANs.
Which of the following wireless communication standards is often described in terms of a wireless personal area network?
Bluetooth
Infrared
Cellular
Ethernet
Bluetooth
Bluetooth networks are often called wireless personal area networks (WPANs).
Your ISP has just finished running fiber‐optic cable in your neighborhood, and you want to switch from cable Internet to a faster fiber‐optic connection. Which of the following statements is true about how you will get an Internet connection?
You will continue to use your cable modem.
You need to switch to using a DSL modem.
You need to switch to using an ONT.
You need to switch to using PoE.
You need to switch to using an ONT.
Fiber‐optic Internet connections use an optical network terminal (ONT) to terminate the fiber and translate it into a digital connection over copper cable inside your home. A cable modem and DSL modem connect copper to copper. Power over Ethernet (PoE) is not relevant in this situation.
If you are going to run a network cable in the space above the drop ceiling in your office, which type of cable should you use?
Plenum
PVC
Coaxial
Fiber‐optic
Plenum
For areas where a cable must be fire retardant, such as in a drop ceiling, you must run plenum‐grade cable. Plenum refers to the coating on the sleeve of the cable, not the copper or fiber within the cable itself. PVC is the other type of coating typically found on network cables, but it produces poisonous gas when burned.
Which of the following connector types is an MFF connector?
BNC
ST
SC
LC
LC
The local connector (LC) is a mini form factor (MFF) fiber‐optic connector developed by Lucent Technologies. If it helps, think of LC as “Little Connector.”
What Ethernet specification would you be running if you needed to make a connection of 10 Gbps over a distance of 5 kilometers?
10GBaseER
10GBaseT
10GBaseSR
10GBaseLR
10GBaseER
If you need to make a connection that is 5 kilometers long, then you are limited to fiber‐optic cable, specifically single‐mode fiber (SMF). Two common SMF standards are 10GBaseER and 10GBaseEW. (Think of the E as extended.) A T designation in an Ethernet standard refers to twisted pair. SR and LR are fiber standards that do not stretch for 5 kilometers.
Which of the following are advantages to using a SAN? (Choose two.)
More storage space on the network
More efficient data storage
Faster data access
Automated data backups
More efficient data storage
Faster data access
Storage area networks (SANs) have many advantages, including block‐level data storage, which is more efficient. They also reduce network loads, provide faster data access, and are easily expandable. They do not inherently provide more storage space (although they are easy to expand) or do automated data backups (although they are easier to set up).
You are installing a network at a friend’s house, and it’s impossible to run a network cable from one point in the house to another. Your friend does not want to use wireless networking. Which of the following is the best option to get network connectivity between the two points?
Power over Ethernet injector
Power over Ethernet switch
Ethernet over Power
Router
Ethernet over Power
Ethernet over Power can transmit network signals over power lines within a closed circuit, such as a house. It’s the best choice. PoE devices provide power to devices that have only an Ethernet connection available. A router is for connecting network segments together.
What type of device will block unwanted traffic from your network using a set of rules called an ACL?
Router
Firewall
Switch
NAS
Firewall
The job of a firewall is to block unwanted network traffic. Firewalls do this by using a list of rules called an access control list (ACL). Routers connect networks to each other, and switches are central connectivity points for networks. A network attached storage (NAS) device is like a dedicated file server.
What type of coaxial cable is recommended for digital television cable signals?
RG‐6
RG‐8
RG‐58
RG‐59
RG‐6
The two RG standards used for cable television are RG‐6 and RG‐59. Of the two, RG‐6 is better because it can run longer distances and can handle digital signals. RG‐59 is for analog signals only. RG‐8 is thicknet coax, and RG‐58 is thinnet coax.
Which of the following devices works with MAC addresses to determine what to do with network traffic?
Hub
Router
Patch panel
Switch
Switch
A switch is a Layer 2 device; therefore, it works with hardware (MAC) addresses. Hubs and patch panels work at Layer 1 and deal with bits, and routers work at Layer 3 and work with logical IP addresses.
Transmitting at 10 Gbps, how far can signals on an MMF cable travel?
100 meters
550 meters
1 kilometer
40 kilometers
550 meters
Multimode fiber (MMF) can transmit up to 550 meters, depending on the Ethernet specification. Other standards using MMF can transmit only up to 300 meters. If you need to transmit up to 40 kilometers, you will have to use single‐mode fiber (SMF).
