CompTIA A+ 220-1101 Core 1 Study Flashcards
Local Area Network (LAN) A network that covers a relatively small area such as a building or group of buildings
(1.1 & 2.7)
Personal Area Network (PAN) - Provides communication for devices owned by a single user that work over a short
distance
- Bluetooth, IR, NFC, etc.
(1.1 & 2.7)
LCD (Liquid Crystal Display) Lightweight & Inexpensive - Poor black levels due to Separate Backlight
(1.2)
TN (twisted nematic) Fast response Times - Low cost - Low Power Use - Limited Viewing Angles
(1.2)
IPS (In Plane Switching) Better Colors - Better Viewing Angles - More Expensive
(1.2)
OLED (organic light-emitting diode) Thinner & Brighter - No Need for Backlight
(1.2)
MDM (mobile device management) - Manage company & user devices
- Centralized management system
- Ensures device security
(1.4)
MAM (mobile application management) - Set policies & restrictions on apps
- Control Company software (Update, Remove, Etc.)
(1.4)
PRL (Preferred Roaming List) - Allows phone to connect to the right tower
(1.4)
Port 20/21 FTP (File Transfer Protocol)
- 20(TCP) for Data Transfers
- 21(TCP) to Control Data Transfers
(2.1)
Port 22 SSH (Secure Shell) - TCP
- Encrypted Communication
- Looks/Acts the same as Telnet
(2.1)
Port 23 Telnet (Telecommunications Network) - TCP
- Non-encrypted Communication
- Log into devices remotely
(2.1)
Port 25 SMTP (Simple Mail Transfer Protocol) - TCP
- Used to send mail from device to mail server
(2.1)
Port 53 DNS (Domain Name System) - UDP
- Converts names to IP addresses
- CRITICAL Resource
(2.1)
stuvia 2026-2027
, CompTIA A+ 220-1101 Core 1 Study Flashcards
Port 67/68 DHCP (Dynamic Host Configuration Protocol) - UDP
- Automated configuration of IP addresses
- IPs can be reserved for certain devices
- IP Range: 10.1.10.10 through 10.1.10.199
(2.1)
Port 80 HTTP (Hypertext Transfer Protocol) - TCP
- Non-encrypted communication in the browser
(2.1)
Port 110 POP3 (Post Office Protocol 3) - TCP
- Receive emails from an email server
- Basic mail transfer functionality
(2.1)
Port 143 IMAP (Internet Mail Access Protocol) - TCP
- Includes management of email inboxes from multiple clients. (Sync email across
multiple devices)
(2.1)
Port 161/162 SNMP (Simple Network Management Protocol) - UDP
- Port 161 queries devices for performance statistics.
- Port 162 monitors when metrics exceed a certain threshold.
(2.1)
Port 389 LDAP (Lightweight Directory Access Protocol) - TCP
- Store & retrieve info in a network directory.
- Commonly used in Microsoft Active Directory.
(2.1)
Port 443 HTTPS (Hyper Text Transfer Protocol Secure) - TCP
- Encrypted Communication in the Browser
(2.1)
Port 445 Server Message Block (SMB) & Common Internet File System (CIFS) - TCP
- Provides direct connection & communication over TCP without the NetBIOS
Transport
(2.1)
Port 3389 RDP (Remote Desktop Protocol) - TCP
- Share a desktop from a remote location
(2.1)
Access Point Extends wired network & converts it into a wireless network.
(2.2)
Router Routes traffic between IP subnets
(2.2)
Patch Panel - Goes between work desks & switches
- Work desk connections to patch panel are permanent.
(2.2)
Firewalls -Filters traffic by TCP/UDP port number (OSI Layer 4 filtering)
-Some can filter based on the application
-Can encrypt traffic in/out of the network (protect traffic between sites)
-Can proxy traffic (common security technique)
-Can be used as a Layer 3 device (routers)
(2.2)
stuvia 2026-2027
Local Area Network (LAN) A network that covers a relatively small area such as a building or group of buildings
(1.1 & 2.7)
Personal Area Network (PAN) - Provides communication for devices owned by a single user that work over a short
distance
- Bluetooth, IR, NFC, etc.
(1.1 & 2.7)
LCD (Liquid Crystal Display) Lightweight & Inexpensive - Poor black levels due to Separate Backlight
(1.2)
TN (twisted nematic) Fast response Times - Low cost - Low Power Use - Limited Viewing Angles
(1.2)
IPS (In Plane Switching) Better Colors - Better Viewing Angles - More Expensive
(1.2)
OLED (organic light-emitting diode) Thinner & Brighter - No Need for Backlight
(1.2)
MDM (mobile device management) - Manage company & user devices
- Centralized management system
- Ensures device security
(1.4)
MAM (mobile application management) - Set policies & restrictions on apps
- Control Company software (Update, Remove, Etc.)
(1.4)
PRL (Preferred Roaming List) - Allows phone to connect to the right tower
(1.4)
Port 20/21 FTP (File Transfer Protocol)
- 20(TCP) for Data Transfers
- 21(TCP) to Control Data Transfers
(2.1)
Port 22 SSH (Secure Shell) - TCP
- Encrypted Communication
- Looks/Acts the same as Telnet
(2.1)
Port 23 Telnet (Telecommunications Network) - TCP
- Non-encrypted Communication
- Log into devices remotely
(2.1)
Port 25 SMTP (Simple Mail Transfer Protocol) - TCP
- Used to send mail from device to mail server
(2.1)
Port 53 DNS (Domain Name System) - UDP
- Converts names to IP addresses
- CRITICAL Resource
(2.1)
stuvia 2026-2027
, CompTIA A+ 220-1101 Core 1 Study Flashcards
Port 67/68 DHCP (Dynamic Host Configuration Protocol) - UDP
- Automated configuration of IP addresses
- IPs can be reserved for certain devices
- IP Range: 10.1.10.10 through 10.1.10.199
(2.1)
Port 80 HTTP (Hypertext Transfer Protocol) - TCP
- Non-encrypted communication in the browser
(2.1)
Port 110 POP3 (Post Office Protocol 3) - TCP
- Receive emails from an email server
- Basic mail transfer functionality
(2.1)
Port 143 IMAP (Internet Mail Access Protocol) - TCP
- Includes management of email inboxes from multiple clients. (Sync email across
multiple devices)
(2.1)
Port 161/162 SNMP (Simple Network Management Protocol) - UDP
- Port 161 queries devices for performance statistics.
- Port 162 monitors when metrics exceed a certain threshold.
(2.1)
Port 389 LDAP (Lightweight Directory Access Protocol) - TCP
- Store & retrieve info in a network directory.
- Commonly used in Microsoft Active Directory.
(2.1)
Port 443 HTTPS (Hyper Text Transfer Protocol Secure) - TCP
- Encrypted Communication in the Browser
(2.1)
Port 445 Server Message Block (SMB) & Common Internet File System (CIFS) - TCP
- Provides direct connection & communication over TCP without the NetBIOS
Transport
(2.1)
Port 3389 RDP (Remote Desktop Protocol) - TCP
- Share a desktop from a remote location
(2.1)
Access Point Extends wired network & converts it into a wireless network.
(2.2)
Router Routes traffic between IP subnets
(2.2)
Patch Panel - Goes between work desks & switches
- Work desk connections to patch panel are permanent.
(2.2)
Firewalls -Filters traffic by TCP/UDP port number (OSI Layer 4 filtering)
-Some can filter based on the application
-Can encrypt traffic in/out of the network (protect traffic between sites)
-Can proxy traffic (common security technique)
-Can be used as a Layer 3 device (routers)
(2.2)
stuvia 2026-2027
