©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
COMPTIA A+ 1101 Exam Questions and
Answers 100% Pass
What does SATA stand for? - Answer✔Serial advanced technology connection
What does PCI stand for? - Answer✔Peripheral component interconnect, legacy
Type of communication of PCI? - Answer✔32bit and 64bit parallel communication
Voltage of PCI? - Answer✔3.3V and 5V
What is the NFC range? - Answer✔4cm
What does LCD stand for and how does it work? - Answer✔Liquid crystal display, light shines
through liquid filters
What are the types of LCD and what do they stand for? - Answer✔TN = twisted nemantic
IPS = in plane switching
VA = vertical alignment
Difference between different LCD types? - Answer✔TN = better response time, bad wide
angles, low power
IPS = better colors, more expensive, good angles
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
VA = best contrast, bad angles
Different types of LCD backlights? - Answer✔CCFL = cold cathode fluorescent lamp
LED
What is special about CCFL? - Answer✔Uses AC power when the computer requires DC, so need
an inverter
How many pins is USB-C? What makes it special? - Answer✔24pins, can be used to transmit
other signals (HDMI, DisplayPort)
What was used before USB connectivity and with what kind of signal? How many pins? -
Answer✔DB-9 cable with RS232 signal, 9pin
What kind of stylus' are there? - Answer✔Capacitive stylus = touch pen
Active stylus = apple pencil, can communicate independently of the screen
What is the older type of headset connection? With what type of signal? - Answer✔3.5mm
TRRS (tip ring ring sleeve) with an analog signal
What were the 2G networks? What did they stand for? - Answer✔GSM = global system for
mobile communication
CDMA = code division multiple access
What companies used GSM and how did it work? - Answer✔AT+T and T-Mobile, has
multiplexing
What does multiplexing mean? - Answer✔Multiple data signals use the same channel without
interference
2
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
What companies used CDMA? How did it work? - Answer✔Verizon and Sprint, each person
used a different code
What was the purpose of 4G? What did it stand for? - Answer✔To combine GSM and CDMA,
LTE = long term evolution
What does EDGE stand for? - Answer✔Enhanced data rates for GSM evolution
What is PRL? How does it update? - Answer✔Preferred roaming list, so your cell phone can
connect to the right tower, updates OTA (over the air)
How does GPS work? - Answer✔30 satellites in the air, your device needs to see 4 for accurate
location
What does MDM stand for? And do? - Answer✔Mobile device management, companies can
manage user devices through one console
What is meant by a partition? - Answer✔Keeping company data and private data separate
What are the two types of IP payloads? What do they stand for? - Answer✔TCP = transmission
control protocol
UDP = user datagram protocol
What does in the clear mean? - Answer✔Not encrypted
Why not just have the IP payload? - Answer✔TCP and UDP allow for multiplexing with different
applications and ports
3
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
How does TCP work? - Answer✔Requires formal setup/teardown process to establish protocol,
called a reliable system because will make sure data reaches server, also has flow control to
make sure one side is not getting data too quickly
Examples of TCP? - Answer✔HTTPS = hypertext transfer protocol secure
SSH = secure shell
How does UDP work? - Answer✔No formal setup process, no confirmation of data sent, for real
time communication
Examples of UDP? - Answer✔DHCP = dynamic host config protocol
TFTP = trivial file transfer protocol
What are the different kinds of ports? - Answer✔Non-ephemeral (permanent port) = same port
for the same service
Ephemeral = client side port that changes
What is a key fact about ports? About TCP and UDP using ports? - Answer✔For communication,
not security
TCP and UDP can use the same port numbers at the same time
FTP? - Answer✔File transfer protocol tcp/20 tcp/21 file transfer between systems
Telnet? - Answer✔tcp/23 in the clear remote command console access
SSH? - Answer✔Secure shell tcp/22 encrypted communication for command console
SMTP? - Answer✔Simple mail transfer protocol tcp/25 only sending mail not receiving
4
COMPTIA A+ 1101 Exam Questions and
Answers 100% Pass
What does SATA stand for? - Answer✔Serial advanced technology connection
What does PCI stand for? - Answer✔Peripheral component interconnect, legacy
Type of communication of PCI? - Answer✔32bit and 64bit parallel communication
Voltage of PCI? - Answer✔3.3V and 5V
What is the NFC range? - Answer✔4cm
What does LCD stand for and how does it work? - Answer✔Liquid crystal display, light shines
through liquid filters
What are the types of LCD and what do they stand for? - Answer✔TN = twisted nemantic
IPS = in plane switching
VA = vertical alignment
Difference between different LCD types? - Answer✔TN = better response time, bad wide
angles, low power
IPS = better colors, more expensive, good angles
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
VA = best contrast, bad angles
Different types of LCD backlights? - Answer✔CCFL = cold cathode fluorescent lamp
LED
What is special about CCFL? - Answer✔Uses AC power when the computer requires DC, so need
an inverter
How many pins is USB-C? What makes it special? - Answer✔24pins, can be used to transmit
other signals (HDMI, DisplayPort)
What was used before USB connectivity and with what kind of signal? How many pins? -
Answer✔DB-9 cable with RS232 signal, 9pin
What kind of stylus' are there? - Answer✔Capacitive stylus = touch pen
Active stylus = apple pencil, can communicate independently of the screen
What is the older type of headset connection? With what type of signal? - Answer✔3.5mm
TRRS (tip ring ring sleeve) with an analog signal
What were the 2G networks? What did they stand for? - Answer✔GSM = global system for
mobile communication
CDMA = code division multiple access
What companies used GSM and how did it work? - Answer✔AT+T and T-Mobile, has
multiplexing
What does multiplexing mean? - Answer✔Multiple data signals use the same channel without
interference
2
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
What companies used CDMA? How did it work? - Answer✔Verizon and Sprint, each person
used a different code
What was the purpose of 4G? What did it stand for? - Answer✔To combine GSM and CDMA,
LTE = long term evolution
What does EDGE stand for? - Answer✔Enhanced data rates for GSM evolution
What is PRL? How does it update? - Answer✔Preferred roaming list, so your cell phone can
connect to the right tower, updates OTA (over the air)
How does GPS work? - Answer✔30 satellites in the air, your device needs to see 4 for accurate
location
What does MDM stand for? And do? - Answer✔Mobile device management, companies can
manage user devices through one console
What is meant by a partition? - Answer✔Keeping company data and private data separate
What are the two types of IP payloads? What do they stand for? - Answer✔TCP = transmission
control protocol
UDP = user datagram protocol
What does in the clear mean? - Answer✔Not encrypted
Why not just have the IP payload? - Answer✔TCP and UDP allow for multiplexing with different
applications and ports
3
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
How does TCP work? - Answer✔Requires formal setup/teardown process to establish protocol,
called a reliable system because will make sure data reaches server, also has flow control to
make sure one side is not getting data too quickly
Examples of TCP? - Answer✔HTTPS = hypertext transfer protocol secure
SSH = secure shell
How does UDP work? - Answer✔No formal setup process, no confirmation of data sent, for real
time communication
Examples of UDP? - Answer✔DHCP = dynamic host config protocol
TFTP = trivial file transfer protocol
What are the different kinds of ports? - Answer✔Non-ephemeral (permanent port) = same port
for the same service
Ephemeral = client side port that changes
What is a key fact about ports? About TCP and UDP using ports? - Answer✔For communication,
not security
TCP and UDP can use the same port numbers at the same time
FTP? - Answer✔File transfer protocol tcp/20 tcp/21 file transfer between systems
Telnet? - Answer✔tcp/23 in the clear remote command console access
SSH? - Answer✔Secure shell tcp/22 encrypted communication for command console
SMTP? - Answer✔Simple mail transfer protocol tcp/25 only sending mail not receiving
4
