A+ 1201 Study Guide

What does SODIMM stand for?

Small Outline Dual In-line Memory Module

What are the two antenna wires used in 802.11 wireless?

Main and AUX

What are some uses of NFC?

Authenticating and unlocking devices

Are styluses universal across devices?

No

What does TRRS stand for?

Tip Ring Ring Sleeve

What is a dongle’s official name?

Port replicator

What type of input do drawing pads use?

Digitizer

What year did 3G first come out?

1998

What speed does 4G offer and what standard does it use?

Up to 150 Mbps using GSM

What is the max speed of LTE-A (Advanced)?

Up to 300 Mbps

What year did 5G launch?

2020

Can 802.11 be used for Wi-Fi calling?

Yes

What does SIM stand for and what is its function?

Subscriber Identity Module; stores carrier and customer information

What allows an eSIM to be transferred?

QR code or nearby phone

How does GPS determine location?

Signal difference from at least 4 satellites

What can BYOD facilitate

Partitions device for remote work use and enforces policies

What does COPE stand for?

Corporate Owned, Personally Enabled

What is multiplexing?

Using multiple application types over a network simultaneously

Which protocols use UDP?

VOIP and Live streaming

Which protocols use TCP?

HTTPS and SSH

What is the range of ephemeral ports?

1024–65535

What are the TCP/UDP port numbers for FTP?

TCP 20/21

What is the port number for SSH?

TCP 22

What is the port number for Telnet?

TCP 23

What is SMTP's port number?

TCP 25

What port does HTTP use?

TCP 80

What port does HTTPS use?

TCP 443

What port does POP3 use?

TCP 110

What port does IMAP use?

TCP 143

What is SMB used for?

File and printer sharing

What port does DNS use?

UDP 53

What is a print server?

A dedicated server or network adapter on a printer

What is Syslog used for?

Message logging

What does SIEM stand for?

Security Information and Event Manager

What does AAA stand for in networking?

Authentication, Authorization, Accounting

What is a proxy server?

Intermediary for requests, used for filtering/access control

What is SCADA used for?

Remote control of industrial systems

What command is the Linux equivalent of NSLookup?

dig

What does an MX record do?

Directs email to the appropriate mail server

What is a TXT record used for?

Domain verification and email security (e.g., SPF, DKIM)

What does DORA stand for?

Discover, Offer, Request, Acknowledge (DHCP process)

What is a concentrator used for?

Encryption/decryption for VPN traffic

What does SNMP do?

Remote monitoring and configuration of network devices

What is the power output for PoE, PoE+, and PoE++?

15.4W, 25.5W, and up to 71W respectively

What is rain fade?

Satellite communication interference from weather

What is a loopback plug used for?

Testing network interface transmit/receive functionality

What is the color gamut?

Range of colors a display can produce

What cable shielding does S/FTP use?

Braided shielding and foil around each pair

What type of cable is used for underground without conduit?

Direct burial STP

What is a ferrule in fiber optics?

Ceramic ring that surrounds the fiber end

What’s the difference between multimode and single-mode fiber?

Multimode is cheaper/shorter range; single-mode supports up to 100km

What connector does Thunderbolt 3+ use?

USB-C

What is the difference between RJ11 and RJ45?

RJ11 = 2/4 wires for analog; RJ45 = 8 wires for Ethernet

Parity level of RAID 5 and RAID 6

Single and Double, Respecively

What does secure boot do?

Verifies OS and firmware integrity before booting

What does a TPM do?

Stores encryption keys and validates system integrity

What are the two types of hypervisors?

Type 1 (bare metal), Type 2 (hosted)

What is VDI?

Virtual Desktop Infrastructure – desktops streamed from a server

What are the three cloud service models?

IaaS (hardware), PaaS (platform), SaaS (software)

What is metered utilization in the cloud?

You pay based on actual usage (e.g., bandwidth/storage)

What should not be used to clean a device microphone

Compressed air

A database on a mobile device containing bands, sub-bands and service provider IDs allowing the device to establish connection with the right cell phone tower is called:

PRL (Preferred Roaming List)

Which of the following answers refers to a dedicated mobile app management software?

MAM (mobile application management)

What is SMTP Used for?

Sending email messages from a client device and sending messages between mail servers.

POP3 protocol

Email retrieval

NetBT

facilitates Netbios for device discovery and communication within a LAN.

IMAP4

Serves the same function as POP3 however with improved capabilities and functionality.

SMB Share

Is used for file sharing and directory services primarily on Windows devices

Bluetooth

Operates in the 2.4 GHz frequency band

802.11a maximum bandwidth

54mbps

Line Printing Protocol or internet printing protocol

Used for printing communication

8023af

poe

802.3at

poe+

802.3bt

4PPoe or POE++

DSL Bandwidth

Dedicated Bandwidth

Optical Network Termination ONT

Translates optical signals into ethernet, usually located at the DEMARC

Terminal Access Controller Access-Control System (TACACS)

Used for handling remote authentication and related services for network access control through a centralized server. Handles AAA