978-0789759825 Chapter 3

CompTIA Network+ N10-007 Certification Guide

Chapter 3 Network Components

1) Which two types of media are twisted-pair cable?

A) STP and UTP

B) MMF and SMF

C) RG-59 and RG-58

D) RJ-11 and RJ-45

2) How fast can Category 5e transfer data?

A) 10 Mbps

B) 100 Mbps

C) 1000 Mbps

D) 10 Gbps

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3) In the following diagram, match the fiber connector on the left with the correct description on

the right.

A) A1, B2, C3, D4

B) A3, B2, C4, D1

C) A2, B1, C3, D4

D) A3, B2, C4, D3

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Answer: B

Explanation:

Chapter: Chapter 3 – Network Components

Remediation: Single-Mode Fiber

4) How many collision domains are shown in the following diagram?

A) 1

B) 2

C) 3

D) 4

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Remediation: Bridges

5) How many collision domains are there in the following diagram?

A) 1

B) 2

C) 3

D) 4

6) What is the purpose of a DNS server?

A) Routing packets to the Internet

B) Blocking packets from the Internet

C) Connecting devices at Layer 2 of the OSI

D) Providing an IP address for a fully qualified domain name

7) What is a DNS MX record?

A) An address record

B) An IPv6 address record

C) A record for email servers

D) A pointer record that points to a canonical name

8) What are the steps a DHCP client goes through when requesting an IP address? Make sure

they are in the correct order.

A) DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, DHCPACK

B) DHCPDISCOVER, DHCPREQUEST, DHCPOFFER, DHCPACK

C) DHCPOFFER, DHCPDISCOVER, DHCPREQUEST, DHCPACK

D) DHCPACK, DHCPDISCOVER, DHCPREQUEST, DHCPOFFER

9) What is the purpose of a virtual desktop?

A) To give users access to their data from any device and location

B) To save money

C) To store user information in a data center

D) Better authentication and security

10) What is the purpose of SIP in VoIP?

A) It carries voice and data.

B) It connects the VoIP phone to an analog phone.

C) It sets up the VoIP phone calls.

D) It works with a PBX.

11) What is the purpose of RTP in VoIP?

A) It carries voice and video.

B) It works with a PBX.

C) It connects the VoIP phone to an analog phone.

D) It manages the dial plan.

12) Which category of UTP cabling is used for 10 Gigabit Ethernet? (Select all that apply.)

A) Category 6a

B) Category 6

C) Category 10

D) Category 5e

13) What is the most common connector that is used with UTP cabling carrying Ethernet traffic?

A) RJ-48

B) RJ-45

C) RJ-11

D) RJ-14

14) What type of UTP cabling is used in building open-air returns to reduce the amount of

poisonous gas created if a fire should occur?

A) XPS

B) Nonplenum

C) Plenum

D) PVC

15) Which type of fiber-optic cabling only allows an individual light path through it?

A) Unicast mode

B) Stream mode

C) Multimode

D) Single-mode

16) What is the name that is used to reference the central primary cable distribution point in a

building?

A) MDF

B) IDF

C) LDF

D) PDF

17) What is the MAC address that is used to send a frame to every local Ethernet device?

A) FF00.0000.0000

B) FFFF.FFFF.FFFF

C) FFFF.0000.0000

D) 0000.0000.0000

18) What is the name of the device that is used primarily to secure a network?

A) Switch

B) VPN concentrator

C) Firewall

D) Router

19) What is the name of the technology that will soon change the landscape of modern

networking by moving the control functionality of a networking device to a central managed

location?

A) Multicast routing protocols

B) Virtual networks

C) Network virtualization

D) Software-defined networking (SDN)

20) What is the name of the VoIP component that maintains a network’s dial plan (routes)?

A) Call agent

B) Policy server

C) Gateway

D) SIP

21) Home automation hubs are becoming very popular with consumers, utilizing smartphone

apps or even voice control (for example, Amazon Echo). What wireless communication protocol

is commonly used for home automation, creating a mesh network of appliances, thermostats, and

door locks?

A) NFC

B) Z-Wave

C) Wireless AP

D) 802.11b

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Chapter: Chapter 3: Network Components

Remediation: Technologies for the Internet of Things (IoT)

22) Which IoT wireless protocol enables technology such as close-range contactless payment

systems?

A) Infrared

B) Zigbee

C) NFC

D) Ant+

23) RFID tagging is an IoT technology that allows assets to be tracked using electromagnetic

fields to automatically identify tagged objects. RFID tags have two main categories: passive tags,

which are powered by collecting radio waves from a nearby reader, and another type that is self-

powered with a battery and can be read at further distances. What is this other type of RFID tag

called?

A) Standard

B) Ant+

C) Cellular

D) Active

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information. Passive tags collect energy from a nearby RFID reader’s interrogating radio waves.

Active tags have a local power source such as a battery and may operate at hundreds of meters

from the RFID reader. Unlike a barcode, the tag doesn’t need to be within the line of sight of the

reader, so it may be embedded in the tracked object.

Chapter: Chapter 3: Network Components

Remediation: Technologies for the Internet of Things (IoT)

24) Organizations use DNS servers to resolve DNS queries. What type of DNS server would be

used to look up the website www.pearson.com?

A) Internal

B) External

C) Gateway

D) Default

25) It is common in DHCP configurations to exclude IP addresses from the scope of addresses

you make available. What type of device might you exclude from a DHCP configuration?

A) BYOD employee smartphone

B) Thin client in the marketing department

C) Sales department laptop

D) Storage server

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Explanation: We exclude certain IP addresses in DHCP for devices with static IP addresses. It is

common to statically assign IP addresses to servers and networking devices such as switches and

routers.

Chapter: Chapter 3: Network Components

Remediation: DHCP Servers

26) Fiber optical patch panels (often termed “fiber distribution panels”) are used for what

purpose?

A) Organize and distribute optical cables

B) Reduce crosstalk

C) Demarcation for CSU/DSU

D) Terminate UTP cables