CompTIA A+ Exam Practice Guide

Practice questions for CompTIA A+ Exam

Which type of connector is sometimes referred to as "thicknet"?

RG-8

In which type of situation would a sub-multi-assembly (SMA) fiber optic cable be particularly useful?

When a waterproof connection is needed

What is the most accurate description of an F-connector?

A coaxial connector used to connect cable TV and FM antenna cables

What connector is a fiber optic cable that is used to connect multimode fiber

Straight Tip (ST)

What is the most accurate description of an F-connector?

A coaxial connector used to connect cable TV and FM antenna cables

What type of connector is found at the end of an RG-58A cable?

Bayonet Neill-Concelman (BNC)

Which type of networking cable is also referred to as "thinnet"?

RG-58

Which of the following is the best description of a standard connector (SC) on a fiber optic cable?

It is box-shaped and is used with single-mode fiber.

What connector is a box-shaped connector that snaps into a receptacle, and is used with single-mode fiber.

SC

What connector (sometimes called a Fiber Jack) has a compact snap-to-lock connector, and is used with multimode fiber.

MT-RJ

What is the most defining quality of a face contact (FC) fiber optic connector?

It features a heavy duty ferrule in the center for more mechanical stability.

What are T568A, T568B, and T568C?

Commercial cabling standards

What is the most defining quality of a face contact (FC) fiber optic connector?

It features a heavy duty ferrule in the center for more mechanical stability.

Which type of fiber optic connector uses a latch and can be used to transition installations from twisted pair copper cabling to fiber?

Local connector (LC)

What type of cable is used to connect a cable modem to a wall jack that provides a signal from a cable provider?

An RG-6 cable with an F-connector

What term refers to the reduction in signal strength over the distance of a cable?

Attenuation

How does a CAT-5e cable differ from a CAT-5 cable?

It supports Gigabit Ethernet, whereas CAT-5 does not.

What is the benefit of using plenum cable?

It does not give off poisonous gases when it burns.

What is a characteristic of CAT-3 cabling?

It is currently used for telephone wiring.

Which category of twisted pair cable supports a signaling rate of 16 MHz?

Cat-3

Which category of twisted pair cable supports a signaling rate of 100 MHz?

Cat-5

Which category of twisted pair cable supports a signaling rate of 1 Gbps?

Cat-5E

Which category of twisted pair cable supports a signaling rate of 250 MHz and max 10Gbps?

Cat-6

Which category of twisted pair cable supports a signaling rate of 1 GHz?

Cat-7

What is currently the best cabling option for digital TV and cable connectivity?

RG-6

What also know as thinnet, is an older type of media used for networking?

RG-58

Alsoknown as "thicknet," was once used as a backbone cable in coaxial network installations, but is very rarely seen anymore.

RG-8

What is the maximum bandwidth of graded index multimode fiber?

2GHz

In which type of fiber optic cable does a laser modulated in amplitude transmit the signal through the fiber?

Single-mode fiber

What is a defining quality of step index multimode fiber?

It contains a core surrounded by cladding, and uses total internal reflection to trap light.

Which component of a fiber optic cable is responsible for reflecting light back in the core?

Cladding

The buffer surrounds the core and cladding and is usually made of plastic.

Coating

The outer jacket wraps and protects the entire cable and is sometimes

Armor

What is a defining quality of step index multimode fiber?

It contains a core surrounded by cladding, and uses total internal reflection to trap light.

What is the native protocol of the Internet, which is required for Internet connectivity?

Transmission Control Protocol/Internet Protocol (TCP/IP)

What is the primary purpose of a Domain Name System (DNS) server?

Translating names into numeric IP addresses

What Windows feature allows a Dynamic Host Configuration Protocol (DHCP) client computer to configure itself automatically with an IP address in the range of 169.254.0.1 to 169.254.255.254 if no DHCP server is available?

Automatic private IP addressing (APIPA)

When TCP/IP communications need to be routed to systems on other networks, the protocol directs the packets to a special address known as what?

A default gateway

Which of the following is an example of a network address that is using the classless inter-domain routing (CIDR) addressing method?

192.168.1.100/21

How many bits make up an Internet Protocol version 4 (IPv4) address and Internet Protocol version 6 (IPv6) address, respectively?

There are 32 bits in an IPv4 address and 128 bits in an IPv6 address.

In an Internet Protocol version 6 (IPv6) address, what does a double-colon represent?

An unbroken string of zero values

In which networking method are mask bits moved in one-bit increments to provide the exact number of nodes and networks required?

Classless inter-domain routing (CIDR)

What is the purpose of implementing client-side Domain Name System (DNS) configuration?

It allows the client to resolve cached host names without connecting to a server

What is used to collect information from network devices for diagnostic and maintenance purposes. This requires both a management system (the SNMP manager) as well as agent software on each device that needs to be managed.

Simple Network Management Protocol (SNMP)

What defines how a client can access information and share directory data on a directory server.

Lightweight Directory Access Protocol (LDAP)

What protocol helps share resources such as files, printers, and serial ports among computers.

Server Message Block (SMB)

protocol enables a user or application to log on to another computer over a network, execute commands, and manage files.

Secure Shell (SSH)

Which protocol works on the Application layer and helps share resources such as files, printers, and serial ports among computers?

Server Message Block (SMB)

What service enables clients to locate the servers that host the Lightweight Directory Access Protocol (LDAP) directory?

Domain Name System (DNS)

What is the port range of 0 to 1,023 referred to as?

Well-Known Ports

What ports have a range of 1024 to 49151

Registered port

What ports have a range of 49152 to 65535

Dynamic and private

What is the defining characteristic of User Datagram Protocol (UDP)?

UDP is a connectionless best-effort delivery protocol in the Transport layer protocol of the Internet protocol suite.

Which service is enabled via a registered port rather than a well-known port?

Remote Desktop Protocol (RDP)

How is user name and password information sent over the network when using Telnet?

It is sent in plaintext unencrypted format.

Which protocol allows users to open and share files over the Internet in native applications rather than just in web browsers?

Common Internet File System (CIFS)

Which protocol provides strong authentication methods and secure communications over insecure channels to allow users to execute commands and manage files

(Secured Shell)SSH

What does the Post Office Protocol 3 (POP3) protocol do?

Most recent version of a standard protocol for receiving e-mail.

What is the key attribute of Internet Message Access Protocol (IMAP) that makes it different from Post Office Protocol 3 (POP3)?

Emails are stored on a remote server until the user deletes them.

The Hypertext Transfer Protocol Secure (HTTPS) service combines Hypertext Transfer Protocol (HTTP) and what other protocol?

Secure Sockets Layer/ Transport Layer Security (SSL/TLS)

What is Port 21?

FTP

What is Port 23?

SMTP

What is Port 80?

HTTP

What is Port 143

IMAP

What is Port 53

DNS

What is Port 443

HTTPS

In a Transmission Control Protocol/Internet Protocol (TCP/IP) network, what term is used to describe the endpoint of a logical connection?

Port

What is the maximum data throughput supported by the 802.11n standard?

600 Mbps

Which form of wireless encryption introduced the Temporal Key Integrity Protocol (TKIP) security protocol?

Wi-Fi Protected Access (WPA)

What special feature of Wi-Fi Protected Access version 2 (WPA2) improves upon Wi-Fi Protected Access (WPA)?

The inclusion of Advanced Encryption Standard (AES) and Cipher Block Chaining Message Authentication Code Protocol (CCMP)

What standard supports speeds up to 54 Mbps in the 5 GHz frequency band.

802.11a

What standard supports speeds up to 11 Mbps in the 2.4 GHz frequency band.

802.11b

What standard supports speeds up to 54 Mbps in the 2.4 GHz frequency band.

802.11g

What standard supports speeds up to 600 Mbps in the 2.4 GHz or 5 GHz frequency ranges.

802.11n

What is capable of reaching transmission speeds of over 1 Gbps

802.11ac

What is the major limitation of the 802.11a standard?

The signal range

What is the benefit of enabling Network Address Translation (NAT) on a router?

External hosts won't be able to identify and connect directly to internal clients.

What are the only three channels in the 2.4 GHz Wi-Fi spectrum that do NOT overlap with each other?

1, 6, and 11

Which of the following devices is example of a wireless access point (WAP)?

A router

What does a proxy server do?

It acts as an intermediary for requests for resources.

What setting should you enable if you wanted to configure a host to automatically and dynamically forward inbound traffic received on specific ports to other ports?

Port triggering

What allows any number of internal addresses to share a pool of external addresses.

Dynamic Network Address Translation (DNAT)

What helps Wi-Fi-enabled devices to be easily discoverable by the router.

Universal Plug and Play (UPnP)

What allows you to control which wireless clients may join your network.

Media access control (MAC) filtering

The 802.11b and 802.11g specifications define 14 channels within the 2.4 GHz Wi-Fi band. Each channel is composed of a range of frequencies transmitting at low power, rather than a single frequency transmitting at high power.

14

Which of the following is not among the recommended actions for enhancing security when initially setting up a router?

Enable Service Set Identifier (SSID) broadcast

In what way does Dynamic Network Address Translation (DNAT) differ from static NAT?

There is not a one-to-one ratio of internal to external addresses.

there is not a one-to-one ratio of internal to external addresses. This basically means that any number of internal addresses can share a pool of external addresses.

Dynamic Network Address Translation (DNAT)

What feature is a requirement for port forwarding to work?

Network Address Translation (NAT)

On a wireless access point, what does the Service Set Identifier (SSID) refer to?

The name of the device

In which type of Internet access delivery does the speed of the network depend on the collective activity of the users sharing the same node connected to the Internet service provider (ISP)?

Cable

Which type of Internet infrastructure is ideal for use in smaller areas where very high data exchange is a priority?

Fiber

What is the primary reason for using satellite Internet?

Extremely long-range access to remote areas where other options are not viable

What is the typical maximum download speed for a regular Digital Subscriber Line (DSL) connection?

1.5 Mbps

A network connects a company branch in the United States to another branch in Germany. What type of network would best describe this?

WAN(Wide Area Network)

Which Internet service technology has Digital Subscriber Line (DSL) largely replaced?

Integrated Services for Digital Network (ISDN)

What single component is required for a device to connect to a network?

A network interface card (NIC)

What is the defining quality of an Integrated Services for Digital Network (ISDN) connection?

It carries both voice and data over digital phone lines or public switched telephone network (PSTN) wires.

In which type of network model are file sharing and authentication services centrally managed?

A client-server model

What networking device is software-based and makes decisions about whether to forward a packet based on whether the destination is part of the same LAN or another LAN?

A bridge