CompTIA A+ 220-1101 Core 1 Study Questions with Verified Answers

CompTIA A+ 220-1101 Core 1 Study Questions with Verified Answers 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) 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 Protoco