cnt 115 answers.docx

8/14/2019 CNT 115 Answers.docx

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.Tools .Communications .Plagarism .Non Course Links .Evaluation .Review Test Submission:Final Exam.ContentUser Lucas Schwartz

Submitted 2/2/11 7:27 PM

Name Final Exam

Status Completed

Score 226 out of 300 points

Time Elapsed 57 minutes, and 55 seconds out of 2 hours.

Instructions

Question 1 .2 out of 2 points

____ is a social engineering practice in which a person attempts to glean access orauthentication information by posing as someone who needs that information.Answer

Correct Answer:

Phishing

. Question 2 .2 out of 2 points

A GUID (globally unique identifier) is a 128-bit number that ensures that no two objects have____ names.Answer

Correct Answer:

duplicate


A computer programmed to act like an IP telephone is known as a(n) ____.Answer

Correct Answer: softphone


IMAP (Internet Message Access Protocol) is a mail retrieval protocol that was developed as amore sophisticated alternative to ____.Answer

Correct Answer:


2/23

POP3


____ software searches a node for open ports.Answer

Correct Answer: Port scanner


SIP and H.323 regulate ____ for VoIP or video-over-IP clients and servers.Answer

Correct Answer:

call signaling and control


All VoIP calls are carried over the Internet.Answer

Correct Answer: False


____ describes the use of any network to carry voice signals using the TCP/IP

protocol.Answer

Correct Answer:

IP telephony


____ is a method of encrypting TCP/IP transmissions.Answer

Correct Answer:

SSL


The combination of a public key and a private key is known as a ____.Answer

Correct Answer: key pair


A patch is a replacement for an entire software package.Answer



3/23


____ is the use of one network to simultaneously carry voice, video, and datacommunications.Answer

Correct Answer: Convergence


A ____ main function is to examine packets and determine where to direct them based ontheir Network layer addressing information.Answer

Correct Answer:

routers


The process of reverting to a previous version of software after attempting to upgrade it isknown as ____.Answer

Correct Answer:

backleveling


A ____ is a document (preferably online) that lists every service and software packagesupported within an organization, plus the names of first- and second-level support contacts for

those services or software packages.Answer Correct Answer:

supported services list


Network security is more often compromised from the inside thanfrom externalsources.Answer

Correct Answer: True


A ____ is a program that runs automatically, without requiring a person to start or stopit.Answer

Correct Answer:

bot


4/23


Some software errors point to a physical connectivity problem.Answer



A ____ attack occurs when a hacker uses programs that try a combination of a user ID and

every word in a dictionary to gain access to the network.Answer

Correct Answer:

dictionary


____ management refers to the detection and signaling of device, link, or componentfaults.Answer

Correct Answer:

Fault


A(n) ____ virus changes its characteristics every time it is transferred to a newsystem.Answer

Correct Answer:

polymorphic


Above all, keep ____ in mind when you upgrade or install hardware on a network.Answer

Correct Answer:

safety


Protection against harmful code involves more than just installing anti-malware

software.Answer



____ are programs that run independently and travel between computers and across

networks.Answer


5/23

Correct Answer:

Worms


SMTP operates from port ____.Answer Correct Answer:

25


The support and use of multiple processors to handle multiple threads is known as____.Answer

Correct Answer:

multiprocessing


When a caller uses an IP telephone, his or her voice is immediately digitized and issued fromthe telephone to the network in ____ form.Answer

Correct Answer:

packet


Within a classful addressing subnet mask, the ____ bits indicate that corresponding bits in an

IPv4 address contain network information.Answer Correct Answer:

1


The directory containing information about objects in a domain resides on computers called____ controllers.Answer

Correct Answer:

domain


____ is a public key encryption system that can verify the authenticity of an e-mail sender andencrypt e-mail data in transmission.Answer

Correct Answer:

PGP


6/23


A ____ is a network device devoted to storage and delivery of frequently requested

files.Answer

Correct Answer:

cache engine


The primary function of the UNIX ____ is to coordinate access to all your computershardware, such as the disks, memory, keyboard, and monitor.Answer

Correct Answer:

kernel


A(n) ____ is a password-protected and encrypted file that holds an individuals identificationinformation, including a public key.Answer

Correct Answer:

digital certificate


A ____ attack occurs when a hacker tries numerous possible character combinations to find

the key that will decrypt encrypted data.Answer

Correct Answer:

brute force


A ____ firewall is a router (or a computer installed with software that enables it to act as a

router) that examines the header of every packet of data it receives to determine whether that

type of packet is authorized to continue to its destination.Answer

Correct Answer:

packet-filtering


In classful addressing, Class C IPv4 address host information is located in the ____.Answer

Correct Answer:

last 8 bits



7/23

____is the local storage of frequently needed files that would otherwise be obtained from an

external source.Answer

Correct Answer:

Caching


____ is a fundamental property of wire that depends on a wires molecular structure and

size.Answer

Correct Answer:

Resistance


____ protocols are the rules that computers follow to accomplish authentication.Answer

Correct Answer:

Authentication


An off-the-shelf workstation can be programmed to act like an IP telephone.Answer



A ____ is a correction, improvement, or enhancement to a particular piece of a softwareapplication.Answer

Correct Answer:

patch


A(n) ____ is a pictorial representation of computer functions that, in the case of NOSs,enables administrators to manage files, users, groups, security, printers, and so on.Answer

Correct Answer:

GUI


IP telephones are directly connected to the local loop.Answer



8/23


9/23

110


A workgroup is a group of interconnected computers that share each others resources without

relying on a central ____.Answer Correct Answer:

server


Resistance is measured in ____.Answer

Correct Answer:

ohms


A network management agent is a ____ that collects information about a devices operationand provides it to the network management application.Answer

Correct Answer:

software routine


A program that disguises itself as something useful but actually harms your system is called a

____.Answer

Correct Answer: Trojan horse


The process where one network management console collects data from multiple networked

devices at regular intervals is known as ____.Answer

Correct Answer:

polling


____ is a type of media capable of storing digitized data and that uses a laser to write data to it

and read data from it.Answer

Correct Answer:

Optical media



10/23

A key component in managing networks is identifying and tracking its hardware and softwarethrough ____ management.Answer

Correct Answer:

asset


When used on a copper-based cable, a continuity tester applies a small amount of ____ toeach conductor at one end of the cable.Answer

Correct Answer:

voltage


____ is a specialized storage device or group of storage devices that provides centralizedfault-tolerant data storage for a network.Answer

Correct Answer:

NAS


Every UNIX and Linux system contains full documentation of UNIX commands in the ____pages.Answer

Correct Answer:

man


A program similar to mtr, ____, is available as a command-line utility in Windows XP, Vista,Server 2003, and Server 2008.Answer

Correct Answer:

pathping


____ is a measure of how well a network service matches its expected performance.Answer

Correct Answer:

QoS


A(n) ____ UPS uses the A/C power from the wall outlet to continuously charge its battery,while providing power to a network device through its battery.Answer


11/23

Correct Answer:

online


____ are often considered third-level support.Answer Correct Answer:

Help desk coordinators


In ____ addressing, only Class A, Class B, and Class C addresses are recognized.Answer

Correct Answer:

classful


Among all video-over-IP applications, ____ is perhaps the simplest.Answer

Correct Answer:

streaming video


An example of a popular mail server is ____.Answer

Correct Answer:

Microsoft Exchange Server


IMAP4 servers require less storage space and usually more processing resources than POPservers do.Answer



In CIDR, conventional network class distinctions do not exist.Answer



The most comprehensive and complex upgrade involving network hardware is a(n) ____upgrade.Answer


12/23

Correct Answer:

backbone


A(n) ____ is a graphical representation of a networks devices andconnections.Answer Correct Answer:

network diagram


The more data you gather while establishing your networks baseline, the less accurate yourprediction will be.Answer



____ are often considered first-level support.Answer

Correct Answer:

Help desk analysts


IPTV, videoconferencing, streaming video, and IP multicasting belong to the range ofservices known as ____.Answer

Correct Answer: video over IP


____ management is the collection, storage, and assessment of information related to theversions of software installed on every network device and every devices hardware

configuration.Answer

Correct Answer:

Configuration


The use of certificate authorities to associate public keys with certain users is known as____.Answer

Correct Answer:

PKI


13/23


A(n) ____ is a list that organizes resources and associates them with their

characteristics.Answer

Correct Answer:

directory


Because backbone upgrades are expensive and time consuming, the first step in approachingsuch a project is to ____ it.Answer

Correct Answer:

justify


A benefit to using an NTFS partition is that it can be read by older operating systems, such asWindows 95, Windows 2000 Professional, and early versions of UNIX.Answer



In a ____ attack, a person redirects or captures secure transmissions as they occur.Answer

Correct Answer:

man-in-the-middle


____ involves manipulating certain characteristics of packets, data streams, or connections to

manage the type and amount of traffic traversing a network or interface at any moment.Answer

Correct Answer:

Traffic shaping


Using VoIP over a WAN allows an organization to avoid paying long-distance telephonecharges, a benefit known as ____.Answer

Correct Answer:

toll bypass



14/23

Human errors, ignorance, and omissions cause more than half of all security breaches

sustained by networks.Answer



____ is one of the most important functions an NOS provides.Answer

Correct Answer:

Client support


A VPN ____ authenticates VPN clients and establishes tunnels for VPN connections.Answer

Correct Answer:

concentrator


Tone generators and tone locators are used to determine characteristics about a cable.Answer



The standard message format specified by SMTP allows for lines that contain no more than

____ ASCII characters.Answer Correct Answer:

1000


UNIX was one of the first operating systems to implement a ____ file system.Answer

Correct Answer:

hierarchical


In general, a(n) ____ is a private switch that accepts and interprets both analog and digital

voice signals.Answer

Correct Answer:

IP-PBX



15/23

Active Directory organizes multiple domains hierarchically in a domain ____.Answer

Correct Answer:

tree


A ____ is a software-based tool that continually monitors network traffic from a server orworkstation attached to the network.Answer

Correct Answer:

network monitor


notation takes the form of the network ID followed by a(n) ____, followed by the number ofbits that are used for the extended network prefix.Answer

Correct Answer:

forward slash ( / )


____ messaging is a service that makes several forms of communication available from asingle user interface.Answer

Correct Answer:

Unified


____ signaling functions are more limited than those performed by the protocols in the H.323group.Answer

Correct Answer:

SIP


A(n) ____ is a deviation from a specified level of system performance for a given period oftime.Answer

Correct Answer:

failure


The core of all UNIX and Linux systems is called the kernel.Answer


16/23



Solaris employs the file system called ____ for its native file system type.Answer

Correct Answer: UFS


Most wireless testing tools contain more powerful antennas than a workstation NIC.Answer



SIP and H.323 account for communication between media gateways.Answer



By default, the 802.11 standard offers substantial security.Answer



Because the octets equal to 0 and 255 are ____, only the numbers 1 through 254 can be used

for host information in an IPv4 address.Answer

Correct Answer:

reserved


____ are frames that are not actually data frames, but aberrations caused by a device

misinterpreting stray voltage on the wire.Answer Correct Answer:

Ghosts


A router that is not configured to drop packets that match certain suspicious characteristics isan example of a risk associated with ____.Answer


17/23

Correct Answer:

transmission and hardware


An administrator can discover the host name assigned to a client by using the ____utility.Answer

Correct Answer:

hostname


When more than two people participate in a videoconference, for example, in a point-to-multipoint or multipoint-to-multipoint scenario, a video ____ is required.Answer

Correct Answer:

bridge


____ is intended to eliminate single points of failure.Answer

Correct Answer:

Redundancy


____ upgrades represent modifications to all or part of an application that are designed to

enhance functionality or fix problems related to software.Answer Correct Answer:

Application


A(n) ____ is a computer that manages multiple media gateways.Answer

Correct Answer:

MGC


____ is the telltale factor for ascertaining where faults in a cable lie.Answer

Correct Answer:

Impedance



18/23

The term ____ memory refers to the RAM chips that are installed on the computers system

board and whose sole function is to provide memory to that machine.Answer

Correct Answer:

physical


Encryption is the last means of defense against data theft.Answer



Mesh topologies and ____ topologies are good choices for highly available enterprise

networks.Answer

Correct Answer:

SONET rings


A ____ usually results from a bad NIC.Answer

Correct Answer:

jabber


In a ____ cable, the transmit and receive wire pairs in one of the connectors arereversed.Answer

Correct Answer:

crossover


For a cabling upgrade, the best way to ensure that future upgrades go smoothly is to carefullydocument the existing cable after making any upgrades.Answer



A(n) ____ is a self-contained, well-defined task within a process.Answer

Correct Answer:

thread


19/23


Documenting and capturing an accurate picture of a networks physical and logical elements

are initial steps in understanding the network.Answer



A ____ attack occurs when a system becomes unable to function because it has been delugedwith data transmissions or otherwise disrupted.Answer

Correct Answer:

denial-of-service


____ is preferred over TCP for real-time applications such as telephone conversations andvideoconferencing.Answer

Correct Answer:

UDP


____ scanning techniques attempt to identify malware by discovering malware-like

behavior.Answer

Correct Answer:

Heuristic


A ____ can be used to intercept a telephone conversation.Answer

Correct Answer:

butt set


A____ is a small electronic device that issues a signal on a wire pair.Answer Correct Answer:

tone generator


The ____ utility allows you to view a hosts routing table.Answer

Correct Answer:


20/23

route


The result from ANDing 11001111 with 10010001 is ____.Answer

Correct Answer: 10000001


In ____, both computers verify the credentials of the other.Answer

Correct Answer:

mutual authentication


Power that is free from noise is called ____ power.Answer

Correct Answer:

clean


Continuity testers can test only copper cable.Answer



____ detects malware by comparing current characteristics of files and disks against an

archived version of these characteristics to discover any changes.Answer

Correct Answer:

Integrity checking


Within a classful addressing, ____ is the default subnet mask for a Class C address.Answer

Correct Answer: 255.255.255.0


In classful addressing, the Class B IPv4 address network ID is located in the ____.Answer

Correct Answer:

first 16 bits


21/23


Many streaming video services - and nearly all of those issued over a public network, such asthe Internet - are examples of ____ transmissions.Answer

Correct Answer: unicast


A ____ is a major change to a software packages existing code.Answer

Correct Answer:

software upgrade


A networked ____ is perhaps the simplest device to add.Answer

Correct Answer:

workstation


On a network using TCP/IP, some nodes may use multiple IP addresses.Answer



____ provides redundancy through a process called disk mirroring.Answer

Correct Answer:

RAID Level 1


Naming (or addressing) conventions in Active Directory are based on the ____ namingconventions.Answer

Correct Answer: LDAP


The gateways that make up the Internet backbone are called ____ gateways.Answer

Correct Answer:

core


22/23


An example of a popular client email software is ____.Answer

Correct Answer:

Microsoft Outlook


Logical connectivity problems often prove more difficult to isolate and resolve than physicalconnectivity problems.Answer



Before using a network monitor or protocol analyzer on a network, it is important to knowwhat ____ on your network normally looks like.Answer

Correct Answer:

traffic


It is more difficult to transmit VoIP and video over IP signals over a packet-switched networkthan it is to transmit data signals.Answer



The goal of fault-tolerant systems is to prevent failures from progressing to faults.Answer



A security policy should state exactly which hardware, software, architecture, or protocolswill be used to ensure security.Answer



A(n) ____ is a graphical representation of a networks wired infrastructure.Answer


23/23

Correct Answer:

wiring schematic


____ management refers to monitoring how well links and devices are keeping up with thedemands placed on them.Answer

Correct Answer:

Performance


____ scanning detects malware by comparing a files content with known malware signaturesin a signature database.Answer

Correct Answer:

Signature


Many network engineers consider ____ to be superior to MGCP.Answer

Correct Answer:

MEGACO


An archive ____ is a file attribute that can be checked or unchecked to indicate whether the

file must be archived.Answer Correct Answer:

bit


RADIUS and TACACS belong to a category of protocols known as AAA (____).Answer

Correct Answer:

authentication, authorization, and accounting


POP3s design makes it best suited to users who retrieve their mail from the same workstationall the time.Answer


cnt 115 answers.docx

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