CompTIA N10-005 CN0-201 SY0-401 examen pratique questions et réponses

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Code d'Examen: N10-005
Nom d'Examen: CompTIA (Network + Certification Exam)
Questions et réponses: 525 Q&As

Code d'Examen: CN0-201
Nom d'Examen: CompTIA (CompTIA CTP+ Certification Exam)
Questions et réponses: 302 Q&As

Code d'Examen: SY0-401
Nom d'Examen: CompTIA (CompTIA Security+ Certification)
Questions et réponses: 512 Q&As

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NO.1 Which of the following is an audio data compression algorithm for voice that compresses digital voice
in packets of 10 milliseconds duration?
A. G.711
B. H.320
C. H.323
D. G.729
Answer: D

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NO.2 Which of the following layers of the OSI model managescommunication between
communicationentities in a network?
A. Presentation
B. Network
C. Transport
D. Session
E. Application
Answer: D

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NO.3 Which of the following protocols provides sequence numbers to VoIP packets?
A. TCP
B. RTP
C. UDP
D. SCCP
Answer: B

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NO.4 Rick, an administrator of a TCP/IP network, wants to achieve the following goals: l Reduce congestion
of network traffic. l Optimize the utilization of the IP address space.
Which of the following technologies may help him to accomplish the task?
A. Pinging
B. Supernetting
C. Routing
D. Subnetting
Answer: D

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NO.5 Which of the following ITU standards specifies PCM voice coding at 64 kbps?
A. G.726
B. G.728
C. G.729
D. G.711
Answer: D

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NO.6 Which of the following devices is used to create VLANs in a small network?
A. Repeater
B. Switch
C. Hub
D. Bridge
Answer: B

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NO.7 Youwork as a NetworkAdministrator for McNeil Inc.Thecompany hasa TCP/IP-based network.
Performance of the network is slow because of heavy traffic.A hub is used as a central connectingdevice
in the network. Which of the following devices can be used in place of a hub to control thenetwork traffic
efficiently?
A. Repeater
B. Router
C. Switch
D. Bridge
Answer: C

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NO.8 H.323 is a group of protocols defined by the International Telecommunication Union for multimedia
conferences over Local Area Networks. H.323 uses ASN.1 binary code. Which of the following layers of
the OSI model is responsible for translating, processing, and reading ASN.1 and ASCII messages?
A. Transport layer
B. Application layer
C. Physical layer
D. Presentation layer
Answer: D

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Code d'Examen: N10-005
Nom d'Examen: CompTIA (Network + Certification Exam)
Questions et réponses: 769 Q&As

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NO.1 Which of the following is a form of encrypting packets for safe, secure data transmission within a
network?
A. RAS
B. PPTP
C. IPSec
D. ICA
Answer: C

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NO.2 Which of the following sizes is the fixed cell length in ATM?
A. 8 bytes
B. 53 bytes
C. 64 kilobytes
D. 128 kilobytes
Answer: B

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NO.3 Joe, a technician, is configuring ports on a switch. He turns off auto-negotiation and sets the port
speed to 1000 Mbps. A user
PC is no longer able to access the network. Which of the following is
MOST likely the problem?
A. The user
NIC does not support 1Gbps
B. The switch is not compatible with 1000Mbps.
C. The user's NIC does not support 100Mbps.
D. Joe needs to restart the DNS server.
Answer: A

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NO.4 The location that the local network connection ends and the ISP responsibility begins is known as the:
A. Access point.
B. Default gateway.
C. IDF connection.
D. Demarcation point.
Answer: D

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NO.5 Which of the following TCP/IP and OSI model layers retransmits a TCP packet if it is not received
successfully at its destination?
A. The transport OSI model layer and the transport TCP/IP model layer
B. The transport OSI model layer and the Internet TCP/IP model layer
C. The network OSI model layer and the transport TCP/IP model layer
D. The network OSI model layer and the Internet TCP/IP model layer
Answer: A

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NO.6 Which of the following network appliances would facilitate an even amount of traffic hitting each web
server?
A. Load balancer
B. VPN concentrator
C. Proxy server
D. Content filter
Answer: A

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NO.7 Sandy, a technician, wants to limit access to a wireless network to company owned laptops, but does
not want to use an encryption method. Which of the following methods would be BEST to accomplish
this?
A. MAC filtering
B. SSL VPN
C. PPPoE
D. WPA Enterprise
Answer: A

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NO.8 Which of the following is an example of two-factor authentication?
A. A username and PIN
B. A username and password
C. A username, password, finger print scan, and smart card
D. A username, password, and key fob number
Answer: D

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NO.9 Sandy, a network administrator, wants to be able to block all already known malicious activity.
Which of the following would allow her to perform this activity.?
A. Behavioral Based IDS
B. Signature Based IDS
C. Behavioral Based IPS
D. Signature Based IPS
Answer: D

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NO.10 Two duplicate pieces of equipment can be used in conjunction for which of the following purposes?
(Select TWO)
A. High availability
B. Fault tolerance
C. Reduce latency
D. Wi-MAX
E. CARP
Answer: AB

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NO.11 Joe, a network technician, is tasked with installing a router and firewall to get an office working with
Internet access. Which of the following features MUST be configured to allow sharing of a single public IP
address?
A. QoS
B. POP3
C. PAT
D. SMTP
Answer: C

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NO.12 Which of the following network topologies, when a single machine's cable breaks, would only affect one
network device and not the rest of the network?
A. Bus
B. Peer-to-peer
C. Ring
D. Star
Answer: D

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NO.13 Sandy, the network administrator, has funding to do a major upgrade of the company LAN. This upgrade
is currently in the planning stage, and Sandy still needs to determine the network requirements,
bottlenecks, and any future upgrades in mind.
Which of the following is the FIRST step in the planning process?
A. Conduct a vulnerability scan
B. Establish a network baseline
C. Conduct traffic analysis
D. Conduct a risk assessment
Answer: B

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NO.14 Sandy, a technician, installs a new WAP and users are able to connect; however, users cannot access
the Internet. Which of the following is the MOST likely cause of the problem?
A. The signal strength has been degraded and latency is increasing hop count.
B. An incorrect subnet mask has been entered in the WAP configuration.
C. The signal strength has been degraded and packets are being lost.
D. Users have specified the wrong encryption type and routes are being rejected.
Answer: B

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NO.15 A company has only three laptops that connect to their wireless network. The company is currently
using WEP encryption on their wireless network. They have noticed unauthorized connections on their
WAP and want to secure their wireless connection to prevent this. Which of the following security
measures would BEST secure their wireless network? (Select TWO).
A. Change the encryption method to WPA
B. Limit the DHCP scope to only have three addresses total
C. Enable the SSID broadcast
D. Enable and configure MAC filtering
E. Change the broadcast channel to a less commonly used channel
Answer: AD

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NO.16 Which of the following network scanners detects and sends out alerts for malicious network activity?
A. Packet sniffers
B. IDS
C. Port scanners
D. IPS
Answer: B

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NO.17 Which of the following should Joe, a technician, do FIRST when setting up a SOHO network?
A. Set up an account with an Internet service provider.
B. Create a list of requirements and constraints.
C. Arrange a domain name with a suitable registrar.
D. Choose the correct operating system version.
Answer: B

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NO.18 Which of the following connector types would Sandy, a network technician, use to connect a serial
cable?
A. RJ-11
B. BNC
C. LC
D. DB-9
Answer: D

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NO.19 Which of the following would Joe, a technician, configure to modify the time a device will hold an IP
address provided through DHCP?
A. DNS suffixes
B. Leases
C. Static IP addressing
D. Reservations
Answer: B

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NO.20 Joe, a user, is unable to reach websites, but is able to ping several Internet IPv4 addresses. Which of
the following is the MOST likely problem?
A. Incorrect subnet mask
B. Incorrect DNS
C. Missing default gateway
D. Incorrect IPv6 address
Answer: B

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