comptia network plus n10 005 test 3

CrucialExams.com - Comptia Network Plus N10 005 Test 3

1) Which port is used by SMTP?

A) 88

B) 143

C) 110

D) 25

Answer: D

Simple Mail Transfer Protocol (SMTP) transfers emails between servers using TCP 25.

2) Which switch for the ping command, will ping a host a specific number of times?

A) -t

B) -l

C) -n

D) -a

Answer: C

The switch "-n" will tell Windows to ping a host a certain amount of times. For example, ping

google.com -n 10, will ping google.com 10 times.

3) What software tool will save a packet for later review?

A) TCP/IP Scanner

B) Protocol Analyzer

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C) Port Scanner

D) TLS

Answer: B

A Protocol Analyzer, also known as a Packet Sniffer, will record a packet and save it to your

computer so you can analyze network traffic at a later time.

4) What is the purpose of using STP ethernet cables instead of UTP ethernet cables?

A) Protects against crosstalk

B) STP cables are fire resistant

C) Protects against EMI

D) STP cables allow data to travel farther distances

Answer: C

Shielded Twisted Pair (STP) is an Ethernet cable that is wrapped in a Electromagnetic

Interference (EMI) resistant jacket. Therefore, the purpose of using STP over UTP is to protectagainst EMI.

5) Jack, a network technician, needs to subnet a class C network into as many subnets as

possible, with at least 22 usable hosts per subnet. What subnet mask should he use?

A) 255.255.255.224

B) 255.255.255.128



C) 255.255.255.240

D) 255.255.255.252

Answer: A

255.255.255.224 is the correct subnet, because it gives 30 usable hosts per subnet, and will give

you the most possible subnets. To learn to subnet, use this link:

http://www.9tut.com/subnetting-tutorial

6) Which of the following is a loopback address?

A) 00-21-86-5C-B4-6C

B) ::127:0:0:1

C) ::0

D) 127.0.0.1

Answer: D

Answer D is correct because 127.0.0.1 is the IPv4 loopback address. Answer A is a mac address,

while B and C are IPv6 addresses, in IPv6 the loopback is ::1

7) In full duplex communication, information can pass?

A) One way

B) Two way, but only one at a time

C) Two way, simultaneously



D) None of the above

Answer: C

Full duplex transmission is when transmission between two parties can happen in both

directions, simultaneously.

8) A subnet placed outside of a firewall, that is very lightly protected is known as what?

A) VPN

B) Subnet zero

C) VLAN

D) DMZ

Answer: D

A DMZ (Demilitarized Zone) is a physical or logical area of a network, that is facing an

untrusted network, generally the internet. It is normally used for servers that need to be

accessable from outside a network.

9) A malicious AP that appears as a legitimate wireless access point, is known as what?

A) Evil Twin

B) War driving

C) Phishing point

D) MITM



Answer: A

An Evil Twin, is a wireless access point that is designed to look legiment. It will then eavesdrop

on network activities of it's wireless users. An Evil Twin is normally configured exactly as a

nearby AP.

10) What type of server dynamically assigns Internet Protocol Addresses?

A) DNS

B) DHCP

C) WINS

D) SNMP

Answer: B

DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses to network

devices.

11) A user on a company's network is experiencing network issues. Their IP is 169.254.144.221,

what does this IP indicate?

A) NIC may be faulty

B) APIPA was used

C) WINS Server is down

D) TCP/IP Stack is corrupt



Answer: B

APIPA (Automatic Private IP Addressing) is a Microsoft Windows feature used when a DHCP

server cannot be contacted, the computer will automatically assign itself an address in the

169.254.0.0/16 range. This is known as Link-Local in IPv6.

12) Which choice prevents indefinite loops in an IP Network?

A) Terminators

B) Hop count

C) TTL

D) VTP

Answer: C

TTL (Time To Live) is the number of devices a packet can traverse before being discarded.

When a device reads and re-transmits a packet it subtracts one from the current TTL. If the

TTL reaches zero, the packet is discarded. TTL is specifically designed to end infinite loops,

while hop count is simply the number of devices between the transmission and destination.

13) You need to view a PC's current network connections, what command would you use?

A) Tracert

B) Ping

C) Ipconfig

D) Netstat



Answer: D

Netstat is a Windows command line tool that will show you all current TCP/IP connections.

14) Switches and Bridges reside on what OSI layer?

A) Session

B) Layer 3

C) Layer 2

D) Application

Answer: C

OSI Layer 2 (Data-Link Layer) consists of many layer 2 protocols, including MAC Addressing,

which is used by switches and bridges. This makes both of them layer 2 devices.

15) Which of the following can translate IP Addresses, allowing for private IP's to traverse the

Internet?

A) NAC

B) NAT

C) DMZ

D) IPv6 tunneling

Answer: B

NAT (Network Address Translation) allows a router to translate IPs, both statically and



dynamically. This allows an entire private network to share a single or group of public IP's to

access the internet.

16) Which type of cabling is least affected by EMI?

A) Fiber-optic

B) Coaxial

C) UTP

D) STP

Answer: A

Fiber-optic is least affected by EMI because it uses light to transmit data, meaning it is actually

not affected by EMI at all.

17) Which choice is a feature on a switch using port-security?

A) Load balancing

B) QoS

C) Vlan Trunking/Tagging

D) Mac Filtering

Answer: D

Mac filtering is a type of port-security on a switch. It allows a switch to only permit a certain

amount of mac addresses, or only an exact set of mac addresses on a specific port. This is



usefull if a network jack is in a public area.

18) RIP and OSPF are examples of what?

A) Authentication protocols

B) Encryption algorithms

C) hashing algorithms

D) routing protocols

Answer: D

RIP (Routing Information Protocol) and OSPF (Open Shortest Path First) are two examples of

routing protocols. Routing protocols exchange network routes between routers to form a

network map or diagram.

19) What layer does a router operate at in the OSI Model?

A) Data link

B) Physical

C) Network

D) Session

Answer: C

Routers operate at the Network level, or layer 3 of the OSI Model. This layer includes protocols

such as IP, OSPF, RIP, and EIGRP.



20) Which tool can help a technician identify a break in a fiber optic line?

A) OTDR

B) Toner & Probe

C) Punch down tool

D) OpticsID

Answer: A

OTDR (Optical Time-domain Reflectometer) is a device that test and characterizes a fiber optic

cable. This device can do many things, including finding a break or fault in a Fiber optic line.


comptia network plus n10 005 test 3

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