CompTIA A+ 1101 Study Deck

Question 1

File Transfer Protocol (FTP)—Data connection

Answer 1

Port 20/TCP
Make files available for download across a network

Question 2

File Transfer Protocol (FTP)—Control connection

Answer 2

Port 21/TCP

Make files available for download across a network

Question 3

Secure Shell (SSH)

Answer 3

Port 22/TCP

Make a secure connection to the command-line interface of a server

Question 4

Telnet

Answer 4

Port 23/TCP

Make an unsecure connection to the command-line interface of a server

Question 5

Simple Mail Transfer Protocol (SMTP)

Answer 5

Port 25 /TCP

Send email messages across a network

Question 6

Domain Name System (DNS)

Answer 6

Port 53/TCP/UDP Resolves host names to IP addresses

Question 7

Dynamic Host Configuration Protocol (DHCP)

Answer 7

Port 67,68 UDP

Question 8

HyperText Transfer Protocol (HTTP)

Answer 8

Port 80/TCP

unsecure websites and web services

Question 9

Post Office Protocol (POP3)

Answer 9

Port 110/TCP

Retrieve email messages. Inbound mail.

Question 10

NetBIOS over TCP/IP

Answer 10

Port 137-139 UDP/TCP

File/Printer sharing Windows network

Question 11

Internet Mail Access Protocol (IMAP)

Answer 11

Port 143/TCP

Read, manage, and retrieve incoming messages. Newer service.

Question 12

Simple Network Management Protocol (SNMP)

Answer 12

Port 161/162 (trap operation) UDP

Collect and organize information on devices and monitor status

Question 13

Lightweight Directory Access Protocol (LDAP)

Answer 13

Port 389/TCP
Query information about network users and resources
Active Directory

Question 14

HTTP Secure (HTTPS)

Answer 14

443

TCP

secure websites and services

Question 15

Server Message Block (SMB)

Answer 15

Port 445/TCP

Implement Windows-compatible file and printer-sharing services on a local network

AKA Common Internet File System [CIFS]

Question 16

Remote Desktop Protocol (RDP)

Answer 16

Port 3389/TCP

Graphical remote control of another client or server

Question 17

Well Known Ports

Answer 17

0-1023

Question 18

Registered Ports

Answer 18

1024-49151

Question 19

Dynamic/Private Ports

Answer 19

49152-65535

Question 20

POP3 (secured)

Answer 20

Port 995

Question 21

IMAP (secured)

Answer 21

Port 993

Question 22

Trivial File Transfer Protocol (TFTP)

Answer 22

Port 69/UDP

File transfer connectionless protocol

Question 23

What is RAID?

Answer 23

Redundant Array of Independent Disks or
Inexpensive Disks

It is a solution that protects data against the risk of data loss

Question 24

What will happen if a RAID array loses a disk?

Answer 24

It will continue to operate but at a lower speed

Question 25

What frequency does the following wireless standard operate? 802.11a

Answer 25

5 GHz (Gigahertz)

Question 26

What frequency does the following wireless standard operate? 802.11b

Answer 26

2.4 GHz

Question 27

What frequency does the following wireless standard operate? 802.11g

Answer 27

2.4 GHz

Question 28

What frequency does the following wireless standard operate? 802.11n

Answer 28

2.4 GHz and 5 GHz

Question 29

At what frequency does wireless standard 802.11ac operate?

Answer 29

2.4 GHz and 5 GHz

Question 30

Name the frequency for wireless standard 802.11ax also known as wi-fi 6.

Answer 30

2.4 GHz and 5 GHz May also go up to 6 GHz

Question 31

What does MIMO stand for and what does it do?

Answer 31

Multiple Input and Multiple Output. It uses multiple antennas to send and receive data then it could with a single antenna.

Question 32

What wireless standard incorporates MIMO? A. 802.11a B. 802.11n C. 802.11g

Answer 32

B. 802.11n

Question 33

Which 2 wireless standards incorporates MU-MIMO (Multiple User Multiple Input Multiple Output)? Choose any that apply. A. 802.11ax (wi-fi 6) B. 802.11ac (wi-fi 5) C. 802.11b D. 802.11g

Answer 33

A and B 802.11ax (wi-fi 6) 802.11ac (wi-fi 5)

Question 34

Which wireless standard can go up to 6 GHz in frequency? A. 802.11ax B. 802.11ac C. 802.11b D. 802.11

Answer 34

A. 802.11ax

Question 35

What is the first step in CompTIA’s troubleshooting process?

Answer 35

Identify the problem

Question 36

What part of the CompTIA troubleshooting process contains performing internal or external research based on symptoms?

Answer 36

Step 2: Establish a theory of probable cause

Question 37

What is the third step in CompTIA’s troubleshooting process?

Answer 37

Test the theory

Question 38

What is step five of the CompTIA troubleshooting steps?

Answer 38

Verify full system functionality and if applicable implement preventive measures

Question 39

How many steps are there in the CompTIA troubleshooting steps?

Answer 39

6

Question 40

What sixth step of the CompTIA troubleshooting steps should be implemented?

Answer 40

Document the findings, actions, and outcomes

Question 41

What should be established as apart of step four of CompTIAs troubleshooting steps?

Answer 41

A plan of action to resolve the problem and implement a solution

Question 42

At what speed does the wireless standard 802.11a operate? A. 54 Mbps B. 5 GHz C. 11 Mbps D. 6.9 Gbps

Answer 42

A. 54 Mbps

Question 43

Which wireless standard incorporates speeds or bandwidth of 11 Mbps?

Answer 43

802.11b

Question 44

Which wireless standard uses a bandwidth of 9.6 Gbps?

Answer 44

802.11ax

Question 45

What two wireless standards incorporate a bandwidth of 54 Mbps?

Answer 45

802.11a and 802.11g

Question 46

The wireless standard 802.11n incorporates a bandwidth of (choose any that apply): A. 5 GHz B. 6.9 Gbps C. 600 Mbps D. 150 Mbps

Answer 46

C. 600 Mbps D. 150 Mbps

Question 47

What color are ground power wires?

Answer 47

Black

Question 48

What voltage wire is the color yellow?

Answer 48

12 V

Question 49

What color voltage wire is 5V ?

Answer 49

Red

Question 50

3.3V is what color wire? A. Black B. Magenta C. Green D. Orange

Answer 50

D. Orange

Question 51

Red belongs to what voltage wire?

Answer 51

5 volts