CompTia A+ : Chapter 5 Flashcards
_______ is immune to electromagnetic or radio frequency interference.
Fiber Optic Cable [ Companies that want to ensure the safety and integrity of their data should use fiber optic cable since it is immune to electromagnetic and radio frequencies. 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?
BNC [Coaxial cable uses BNC 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/Orange [ A crossover cable will flip pins 1 & 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.
CSMA/CD ( Carrier Sense Multiple Access with Collision Detection) [ 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 this case of two NICs transmitting at the same time (a collision), both NICs pause to detect and then transmit the data. CSMA/CD listens to the line as well but tries to avoid collisions. T658A/T568B are twisted pair wiring standards. Demand priority is a media access method, but we didn’t discuss it all in the chapter. ]
What is the lowest grade of UTP that is rated for 100 Mbps transmission?
Cat 5 [ prior to Cat 5, 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 ______.
Hub/Switch [ 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.
Fiber Optic [ Fiber optic can span a distance of several kilometers because it has a 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 [ 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 wireless communication standards is often described in terms of a wireless personal area network?
Bluetooth [Wireless personal area network (WPANs)]
Which of the following networking hardware devices is capable of creating VLANs?
A managed switch [ A managed switch can create 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]
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-grade cable [ For areas where 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?
LC (Local Connector) [ Local connector is a MFF ( Mini Form Factor) 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?
SMF (Single Mode Fiber - Fiber Optic Cable) [Two common SMF standards are 10GBaseER and 10GBaseEW (Think of 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.]
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 need to switch to a ONT (Optical Network Terminal). [ Fiber Optic Internet connections use a 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.]
Which of the following are advantages to using a SAN? (Choose two)
More efficient data storage & faster data access [Storage Area networks have many advantages, including block level data storage, which is more efficient.]
