CompTIA A+ Core 1 Flashcards
1
Q
True or False: every time you charge a Li-ion or LiPo battery, you diminish its capacity
A
True
2
Q
True or False: All programs that are executing in your operating system are executing in memory
A
True
3
Q
What type of device storage medium is most popular nowadays?
A
SSD (solid state drive)
4
Q
Are SSDs that are SATA connected or unconnected smaller and have better storage capabilities?
A
Unconnected M.2 SSDs
5
Q
Do HDD or SSD typically perform better?
A
SSD
6
Q
What is the best way to migrate from HDD to SDD?
A
Create an image (clone) of the HDD and upload that to the new SSD.
7
Q
What does LAN stand for?
A
Local Area Network
8
Q
What does PAN stand for?
A
Personal Area Network
9
Q
What is the other name for WPAN?
A
Bluetooth
10
Q
What is the other name for WWAN?
A
Cellular
11
Q
What is the other name for WLAN?
A
Wifi
12
Q
What does NFC stand for?
A
Near field communication
13
Q
What is NFC?
A
a data transfer method or authentication method that does not require contact (usually within 4 cms)
14
Q
What does LCD stand for?
A
Liquid Crystal Display
15
Q
What are the advantages of an LCD display?
A
Lightweight, relatively low power, relatively inexpensive,
16
Q
What does USB stand for?
A
Universal serial bus
17
Q
What is the new standard connector?
A
USB-C
18
Q
What signal does the DB9 serial interface use?
A
RS-232
19
Q
What are touchscreen pens also know as?
A
Capacitive stylus/ touchscreen stylus
20
Q
What is an active stylus?
A
A digital stylus is a more advanced writing tool (an apple pen is an example)
21
Q
What is a drawing pad?
A
An external digitizer that allows you to use a pen without interacting with the screen
22
Q
What does the trackpad replace?
A
The mouse
23
Q
What is an audio jacks technical name?
A
A TRRS (tip ring ring sleeve) connector
24
Q
True or false: a docking station can increase the hardware capabilities of your laptop
A
True
25
What is was the original cell standard?
Global system for mobile communication
26
Can two people communicate at the same time when using the GSMC?
No
27
What does LTE stand for?
Long term evolution
28
What converged the GSM and CSMA standard?
4G LTE
29
What is LTE-A?
LTE-advanced
30
What speed is data transferred at for 5G?
Up to 10 gigabits/sec
31
What is a PRL update?
A preferred roaming list allows your phone to connect to the right tower
32
How many times do you have to pair a Bluetooth device?
1 time
33
Who created GPS?
The US department of defense
34
What does GPS stand for?
Global Positioning System
35
What can an organization/individual use to gain access over mobile devices?
MDM: mobile device manager
36
In the road and vehicle networking analogy, what is the road?
the network topology (ethernet, DSL, cable system, etc)
37
In the road and vehicle analogy, what is the vehicle?
the IP
38
In the road and vehicle analogy, what are the boxes inside the vehicle?
boxes of TCP and UDP
39
In the road and vehicle analogy, what is the stuff inside the boxes inside the vehicle?
Your applicable information
40
What is OSI Layer 4?
The transport layer
41
What does IP stand for?
Internet Protocol
42
What does TCP stand for?
Transmission Control Protocol
43
True or False: TCP is a formal connection setup
True
44
True or False: TCP can not manage out of order messages or retransmissions
False
45
What is flow control?
when the receiver of data can tell the sender to change the speed at which it is sending data
46
Does TCP have flow control?
Yes
47
True or False: UDP is connectionless
True
48
Is UDP or TCP unreliable? (no error recovery or reordering of data)
UDP
49
What does it mean for a payload to be unreliable?
It does not communicate with the receiver when sending data
50
Is TCP or UDP used for real time data transfers? (like phone calls)
UDP
51
What does UDP stand for?
User Datagram Protocol
52
What are the two examples of connectionless protocols of UDP?
DHCP and TFTP
53
What are two examples of connection-oriented protocols that use TCP?
HTTPS and SSH
54
What port numbers are non-ephemeral?
0-1023
55
What port numbers are ephemeral?
1024-65535
56
Are port numbers a security mechanism?
No, just a communication tool
57
What is FTP?
File transfer protocol transfers files between systems
58
What port numbers does FTP use?
tcp/20 for active mode data and tcp/21 for control
59
What is the port number for SSH?
tcp/22
60
What does Telnet stand for?
Telecommunications Network
61
What port does Telnet use?
tcp/23
62
What are two popular options to login to devices remotely?
SSH and Telnet
63
Does Telnet or SSH send data that is encrypted?
SSH
64
What is SMTP?
Simple Mail Transfer Protocol is how server to server email communication happens and how a device sends mail
65
What port does SMTP use?
tcp/25
66
What is DNS?
Converts human readable web addresses to IP addresses
67
What port does DNS use?
udp/53
68
What is DHCP?
Dynamic Host Configuration Protocol automates configuration of IP addresses, subnet mask and other options
69
What port does DHCP use?
udp/67 and udp/68
70
What does HTTP stand for?
HyperText Transfer Protocol
71
What port does HTTP use?
tcp/80
72
What port does HTTPS use?
tcp/443
73
What is POP3?
Post Office Protocol version 3 is a way to receive emails from an email server
74
What port does POP3 use?
tcp/110
75
What is IMAP4?
Internet Message Access Protocol v4 is a way to receive emails from an email server
76
What port does IMAP4 use?
tcp/143
77
What is SMB?
Server Message Block is the protocol used by Microsoft to share files and send print jobs
78
What is SMB AKA?
Common Internet File System (CIFS)
79
What port does modern SMB use?
tcp/445
80
What is SNMP?
Simple Network Management Protocol is a way to manage your network and monitor devices on that network?
81
What port does SNMP use for queries?
udp/161
82
What port does SNMP use for traps?
udp/162
83
What version of SNMP is encrypted?
version 3
84
What is LDAP?
The lightweight directory access protocol
85
What port is LDAP on?
tcp/389
86
What is RDP?
Remote Desktop Protocol is a way for an individual to access a machine virtually
87
What port does RDP use?
tcp/3389
88
What does a router do?
Routes traffic between IP subnets and/or connects networks together
89
What are switches that have routers inside them sometimes called?
Layer 3 switches
90
Can a router connect different networks together?
Yes
91
What is ASIC?
Application specific integrated circuit
92
What makes a switch unmanaged?
fixed configuration, little integration
93
What makes a switch managed?
VLAN configuration, traffic prioritization, Spanning Tree Protocol (STP), Port Mirroring
94
What is an access point?
a bridge that extends the wired network into a wireless network
95
What are patch panels?
combination of punch down blocks and RJ-45 connectors
96
What is a firewall?
filters traffic by port number or application, can encrypt traffic into/out of network, can proxy traffic,
97
What OSI layer is the firewall that filters by port number?
layer 4
98
What OSI layer is the firewall that filters by application?
layer 7
99
Can most firewalls be layer 3 devices (router)?
Yes
100
What is PoE?
Power over Ethernet is when power for a device is carried over the ethernet
101
What is a hub?
A multi-port repeater (traffic going into one port is repeated to every other port)
102
Are hubs efficient?
No, the repeating to every port is a lot of unnecessary work
103
What is broadband?
Different traffic types and frequencies over one cable modem
104
What is a network interface card?
a NIC is the fundamental network device.
105
What must every device that is on a network have?
NIC
106
What is SDN?
Software defined networking
107
What are the three layers of an SDN?
Application Layer, Control Layer, Infrastructure Layers
108
What are the three plans of an SDN?
Management Plane, Control Plane, Data Plane
109
What is RFID?
Radio frequency identification is a way to identify things. RF is sent to the tag which powers it on and it sends back an ID
110
True or False: NFC is a form of RFID
True
111
What are the two frequencies wireless networks use?
2.4 GHz and 5GHz
112
Does 2.4GHz or 5GHz deliver data faster?
5GHz
113
Does 2.4GHz or 5GHz have longer range?
5GHz
114
What is DNS?
Domain Name System converts names to IP addresses and vice versa
115
What is syslog?
System logs service that centralizes all log files from various applications
116
What is SIEM?
System Integrated Event Manager
117
Does the category of spam include malicious emails?
yes
118
What is UTM?
Unified Threat Management is an attempt for an all in one security appliance
119
Do all in one security appliances exist?
Yes, next gen firewalls, web gateways, and UTMs are examples of this
120
What does a load balancer do?
Distributes the load between servers
121
What is a proxy server?
An intermediate server that receives a request from a client and then the proxy pushes the request to the actual server. This provides a layer of security
122
What is IoT?
Internet of Things is term used to refer to devices that can connect to the internet
123
What is the maximum value a byte can represent?
255
124
How many bits are in IPv4?
32
125
How many bits are in IPv6?
128
126
Does every device need a unique IP address in a network?
Yes
127
What is the default gateway?
The router that allows you to communicate outside of your local subnet
128
True or False: The default gateway must be an IP address on the local network
True
129
What is the 4 step process DHCP goes through for IP addresses?
Discover, Offer, Request, Acknowledge
130
If you don't want you IP address to change, what do you have to do?
Disable DHCP on the device
131
Is DNS hierarchial?
Yes
132
What are three examples of top-level domains?
.com, .net, .org
133
Are A or AAAA records for IPv6?
AAAA records
134
How is email spoofing prevented?
the receiver checks that the incoming mail really did come from an authorized host
135
What is a VLAN?
A virtual local area network is where a network is logically separated but share the same hardware
136
What is a VPN?
A virtual private network is a way to encrypt data traversing a public network
137
What is a MAN?
Metropolitan Area Network
138
What is a SAN?
Storage Area Network
139
