Chapter 5 - Networking Fundamentals Flashcards
_______ is immune to electromagnetic or radio-frequency interference.
A. Twisted Pair Cabling
B. CSMA/CD
C. Broadband coaxial cabling
D. Fiber-optic cabling
D. 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 radioj-frequencey 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?
A. RJ-11
B. RJ-45
C. F Type
D. SC
C. 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?
A. White/Green
B. Green
C. White/Orange
D. Orange
C. 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, and 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.
A. T568A/T568B
B. CSMA/CD
C. CSMA/CA
D. Demand Priority
B. 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 100Mbps transmission?
A. Cat 5
B. Cat 5e
C. Cat 6
D. Cat 6a
A. 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 _______?
A. NIC
B. Bridge
C. Router
D. Hub
D. 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?
A. Unshielded twisted pair
B. Coaxial
C. Fiber-optic
D. Shielded twisted pair
C. 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?
A. Routers
B. Firewalls
C. Hubs
D. Switches
A. 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?
A. Firewall
B. Patch panel
C. Unmanaged switch
D. Managed switch
D. 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?
A. Bluetooth
B. Infrared
C. Cellular
D. Ethernet
A. 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?
A. You will continue to use your cable modem
B. You need to switch to using DSL modem
C. You need to switch to using an ONT
D. You need to switch to using PoE
C. 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?
A. Plenum
B. PVC
C. Coaxial
D. Fiber-optic
A. 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?
A. BNC
B. ST
C. SC
D. LC
D. The local connector (LC) is a mini form factor (MFF) fiber-optic connector developed by Lucent Technologies. If it helps, think of LC as a “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?
A. 10GBaseER
B. 10GBaseT
C. 10GBaseSR
D. 10GBaseLR
A. 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 120GBaseEW. (Think of the E as extended.) A, T design 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 the advantages of using a SAN? (Choose two.)
A. More storage space on the network
B. More efficient data storage
C. Faster data access
D. Automated data backups
B, C. 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)
