Fundamentals of Networking Comp 2 Pt1
1000Base-SX has a maximum throughput of ____.
1 Gbps
The speed of a T1 line is
1.544 Mbps
1000Base-T is a standard for achieving throughputs ____ times faster than Fast Ethernet over copper cable.
10
What is the maximum distance specified in the structured cabling standard for a horizontal wiring subsystem?
100 m
The segment length for 100BaseT is
100 meters
In the case of connecting two WLANs, access points could be as far as ____ feet apart.
1000
Your school's network has outgrown its designated telco rooms, so you decide to house a few routers in an old janitor's closet temporarily. However, since the closet has no power outlets, you will have to supply the routers power over the network. If you're lucky, your LAN already uses which of the following Ethernet standards that will allow you to do that?
1000Base-T
What is another name for Fast Ethernet using two pair of wire in a CAT5 cable?
100BaseTX
The maximum cable length for a 100BASE-T network is
100m
Which of the following will support a 10,000 Mbps connection over fiber optio cable with a maximum segment length of 10 kilometers?
10GBASE-LR
Which of the following is the type of 10-Gigabit Ethernet that can carry signals the farthest, nearly 25 miles?
10GBase-ER
The 10-gigabit fiber optic standard with the shortest segment length is ____.
10GBase-SR
Which Ethernet standards is specially encoded for transmission over WANs using SONET technology?
10GBase-SW
The byte 00001110 means ____ on a digital network.
14
You work for a regional common carrier and have been asked to design a passive optical network that will bring high speed Internet access to a new neighborhood in a nearby suburb. The area served by the network will bring fiber-optic cable to as many as 45 households. At least how many ports on the carrier's OLT should you expect to configure?
2
Your company has decided to order ADSL from its local telecommunications carrier. You call the carrier and find out that your office is located 17,000 feet from the nearest CO. Given ADSL's potential throughput and your distance from the CO, what is the maximum downstream throughput you can realistically expect to achieve through this connection?
2 Mbps
The frequency of 802.11b and 802.11g is which of the following?
2.4 GHz
What frequency band is used by 802.11b, 802.11g, and 802.11n?
2.4 GHz
The average geographic range for an 802.11a antenna is ________ meters
20
Most satellites orbit the earth _________ miles above the equator in a geosynchronous orbit.
22,300
802.11b and g signals can extend a maximum of _________________ feet and still deliver data reliably.
330
A customer is considering upgrading his office to wireless. He is concerned because his phone system used 900Mhz cordless handsets and headsets. To overcome any issues related to his concern, which wireless specification would you recommend.
802.11a 802.11b 802.11g 802.11n
Which of the following are capable of operating at 11Mbps? (Choose all that apply)
802.11a 802.11b 802.11g 802.11n
Which of the following are capable of operating at 54mbps?
802.11a 802.11b 802.11g 802.11n
Which 802.11 standard uses the 2.4 GHz band and operates at either 11Mbps or 54 Mbps
802.11g
Which 802.11 standard uses the 2.4GHz band and operates at either 11Mbps or 54Mbps?
802.11g
Which of the following wireless networking standards can reliably transmit data the farthest?
802.11n
What is the decimal number corresponding to binary number 00001001?
9
You have been asked to provide a connectivity solution for a small, locally owned franchise of a national restaurant chain. The owners of the franchise want to send their confidential sales figures, personnel information, and inventory updates to the national office, which is 1200 miles away, once per week. Their total monthly data transfer will amount to almost 50 megabytes. The franchise owners do not plan to use the connection for any other purposes, and they do not have any IT staff to support the connection. Also, they do not want to spend more than $100 per month, nor more than $500 to install their connection. Considering cost, speed, reliability, technical expertise, distance, security, and the nature of their environment, what is the best solution for this client?
A DSL connection to a local telephone and internet service provider that uses IPSec to encrypt the data before it is sent to the national office's file server over the internet.
Which of the following is an advantage of using a client/server network over using a peer-to-peer network?
A client/server network allows resources to be managed centrally
In which of the following network links might you use MT-RJ connectors?
A fiber-optic connection between server and router
Every user at one location on your company's WAN is unable to reach the Internet. Your colleague on the network management team suspects a critical router is unable to connect to the network. Because you're in the building affected by the outage, she asks you to troubleshoot the router. You confirm that the router is not responding to any requests over the network. Which of the following do you use to connect directly from your laptop to the router to diagnose it?
A serial cable
Which two of the following are asymmetrical versions of DSL?
ADSL VDSL
Which of the following are capable of 622Mbps of bandwidth?
ATM
What technique is used to achieve 1-Gbps throughput over a Cat 5 cable?
All four wire pairs are used for both transimission and reception
Which device is used to prevent a signal from bouncing on a Thinnet network?
BNC Terminator
A(n) ____ is the place where a telephone company terminates lines and switches calls between different locations.
CO
In the 802.11 standard, IEEE specifies what type of access method?
CSMA/CA
All ethernet networks, independent of their speed or frame type, use an access method called )______________.
CSMA/CD
In modulation, a simple wave called a(n) ____ wave, is combined with another analog signal to produce a unique signal that gets transmitted from one node to another.
Carrier
With everything else being equal, a network using which of the following UTP types will suffer the most cross talk?
Cat 3
Modern LANs use _________ or higher wiring.
Cat 5
What is the minimum cabling standard required for 10GBase-T ethernet?
Cat 6
____ networks are the most popular type of network for medium- and large-scale organizations.
Client/Server
The serial interface on the back of the connectivity device is often labeled "____."
Console
Which connector is used in RS-232 transmissions?
DB-25
A ______________ connection is one in which a user connects her computer, via a modem, to a distant network and stays connected for a finite period of time.
Dial-up
If an organization follows structured cabling standards, where would its demarc be located?
Entrance Facilities
Ethernet and ATM both specify Data Link layer framing techniques. How do they differ?
Ethernet uses variably sized packets, whereas ATM uses fixed-sized cells
The effects of scattering, reflecting and diffracting on a wireless signal are referred to collectively as ___________.
Fading
AFter SONET, BPL has the best maximum throughput available.
False
Clients on a client/server network share their resources directly with each other.
False
In a star topology, a single connection failure will halt all traffic between all sites.
False
Latency occurs when a signal traveling on one wire or cable infringes on the signal traveling over an adjacent wire or cable.
False
The most popular method for connecting nodes on a network is circuit switching.
False
The simplest form of a network is a client/server network
False
The strength of an electrical signal is directly proportional to its frequency.
False
WiMAX is defined by the IEEE 802.11 standard
False
Which cable would you use to connect a server 1 kilometer away without the use of a repeater?
Fiber Optic
Which cable is most resistant to wire-tapping?
Fiber-Optic
Ethernet relies on which of the following transmission types?
Full-duplex
When signals are free to travel in both directions over a medium simultaneously, the transmission is considered ____.
Full-duplex
____________________ means that satellites orbit the Earth at the same rate as the Earth turns
GEO (Geosynchronous Earth Orbit)
A business has expanded to additional floors in the building. The expansion only calls for switches and patch panels to be installed. Which of the following would the network manager need to locate?
IDF
A customer calls your ISP's technical support line, complaining that his connection to the Internet usually goes as fast as 128 Kbps, but today it is only reaching 64 Kbps. He adds that he has tried dialing up three different times with the same result. What type of connection does this customer have?
ISDN
Many network problems can be traced to poor cable ____ techniques.
Installation
Which of the following is a potential drawback to using fiber-optic cable for LANs?
It is expensive
How does ATM differ from every other WAN technology described in this chapter?
It uses fixed-sized cells to carry data
Which of the following wireless technologies boasts the highest maximum theoretical throughput?
LTE
Which of the following wireless standards provides an entirely IP-based, packet-switched network for both voice and data transmissions? (Choose two.)
LTE 802.16m
Suppose you work for a telecommunications carrier who is looking into providing WiMAX in a suburb of a large city. A colleague suggests that your company reserve licensed frequencies from the FCC for your service. Why?
Licensed frequencies will suffer less interference than unlicensed frequencies.
Which of the following elements of the PSTN is most likely capable of transmitting only analog signals?
Local Loop
To function as a server, a computer must be running a ___________.
NOS (network operating system)
Which of the following WAN technologies operates at Layer 3 of the OSI model?
NOT sonet, atm
Which statement describes an advantage of networks?
Networks enable multiple users to share resources
The data rate of a particular SONET ring is indicated by its ____, a rating that is internationally recognized by networking professionals and standards organizations.
OC (optical carrier) level
You work for an Internet service provider that wants to lease a T3 over a SONET ring. What is the minimum Optical Carrier level that the SONET ring must have to support the bandwidth of a T3?
OC1
On a 10Base-T network, which of the following best describes how the wires of a UTP cable are used to transmit and receive information?
One wire pair handles data transmission, while another wire pair handles data reception
____________________ is a term used by networking professionals to describe the nondata information that must accompany data for a signal to be properly routed and interpreted by the network
Overhead
The ____ encompasses the entire telephone system, from the wires that enter homes and businesses to the network centers that connect different regions of a country.
PSTN
Which of the following would use CAT5e connectors?
Patch panel
When a computer can both access and share resources on a network it is called a:
Peer
Which network model ensures that no computer on the network has more authority than another?
Peer-to-peer
Which type of network is the easiest and cheapest to set up?
Peer-to-peer
____________________ transmission involves one transmitter and multiple receivers.
Point-to-multipoint
What is a common language or common rules that computers use to communicate with each other called?
Protocol
WANs typically send data over ___________ available communications networks.
Publicly
Where do you terminate CAT 6a cables in the cross-connect facility to complete a circuit?
Punch-down block
What connector type is MOST commonly associated with phone jacks?
RJ-11
Suppose your WAN contained a segment that relied on the l0GBase-EW standard. Which of the following transmission technologies might it use?
SONET
Suppose you work for a bank and are leasing a frame relay connection to link an automatic teller machine located in a rural grocery store with your bank's headquarters. Which of the following circuits would be the best option, given the type of use this automatic teller machine will experience?
SVC
____ facilitates communication and resource sharing between other computers on the network.
Server
Often, separate LANs are interconnected and rely on several _________ running many different applications and managing resources other than data.
Servers
What part of a cable protects it against environmental damage?
Sheath
The speed of a T-carrier depends on its ____ level.
Signal
Which network topology is the most common?
Star
____________________ is a component of a network's logical topology that determines how connections are created between nodes.
Switching
A __________________ uses TDM ( time division multiplexing) over two wire to divide a single channel into multiple channels
T-carrier
Which standard is also known as structured cabling?
TIA/EIA Commercial Building Wiring Standard
The science museum where you work determines it needs an internet connection capable of transmitting and receiving data at 12 mbps at any time. Which T-carrier solution would you advise?
Ten T1s
What are the disadvantages of a bus topology?
The cabling is difficult to troubleshoot A break in the cabling will bring down the network.
Your colleague, in describing the benefits of a client/server network, mentions that it's more scalable than a peer-to-peer network. What does she mean by this?
The client/server network can be more easily expanded.
Which of the following may limit a DSL connections capacity?
The distance from the customer to the carrier's switching facility
ATM is a WAN technology that functions in the Data Link layer.
True
Ethernet is an example of a baseband system found on many LANs.
True
Modern ethernet networks are based on the star topology
True
SONET specifies framing and multiplexing techniques at the physical layer
True
The maximum distance a signal can travel and still be interpretted accurately is equal to the segment's maximum length
True
What is a symptom of a faulty switch port?
Twelve users in one department complain that they cannot log on to the network
In which of the following examples do the workstations necessarily share a collision domain?
Two computers connected to the same hub
___________________ cabling consists of one or more insulated wire pairs encased in a plastic sheath.
UTP
Given their long-distance capabilities, 10GBase-ER and 10GBase-EW are best suited for use on ________.
WANs
____ is a technology used with fiber-optic cable, which enables one fiber-optic connection to carry multiple light signals simultaneously.
WDM (wavelength division multiplexing)
As the network manager for a small business, you have been asked to evaluate high-speed, packet-switched wireless data services that your company's users can use at their desks, in their cars, and at their homes within your metropolitan area. Which two of the following meet those criteria, and are therefore candidates for evaluation?
WiMAX2 LTE
Which 802.11 are capable of operating at 54Mbps?
all of the above
Fiber-optic cable is normally used for:
backbones
In a process called __________, two 64-Kbps ISDN B channels can be combined to achieve an effective throughput of 128 Kbps
bonding
A _______ occurs when two transmissions interfere with each other
collision
The more twists per foot in a pair of wires, the more resistant the pair will be to ____.
cross talk
A physical topology ____.
depicts a network in broad scope
Least susceptible to EMI
fiber optic cable
highest bandwidth and level of security
fiber optic cable
A common way of sharing resources on a peer-to-peer network is by modifying the ____ controls using the computer's operating system.
file-sharing
A complex combination of topologies is known as a ____ topology.
hybrid
As part of CSMA/CD, a process known as ____________________ allows the NIC issue a special 32-bit sequence that indicates to the rest of the network nodes that its previous transmission was faulty and that those data frames are invalid.
jamming
A(n) ____________________ is a computer that is not connected to other computers and that uses software applications and data stored on its local disks.
stand-alone computer
Without _________, a bus network would suffer from bounce back.
terminators
You are designing a 100Base-T network to connect groups of workstations in two different offices in your building. The offices are approximately 250 meters apart. If you only use repeating devices to connect the workstation groups, how many hubs will you need?
two
The distance between corresponding points on a wave's cycle is called its _____________>
wavelength
