1steps for troubleshooting power
power button, battery, DC jack, AC adapter, AC outlet
2how many pins does SODIMM DDR3 have
204 pins
3how many pins does SODIMM DDR4 have
260 pins
4types of laptop storage drives and form factor sizes
SSD, magnetic disk, hybrid and 2.5 or 1.8 inch
5ways a laptop can communicate with other computers
wired/wireless ethernet bluetooth, cellular WAN
6what does a screen inverter do
converts DC voltage from the motherboard into AC voltage for the backlight
7connectors used by Androids
USB-C or Micro-USB
8connectors used by iOS
USB-C or lightning
9steps to connect to a Wi-Fi network
scan, enter SSID, enter passcode, verify connectivity
10steps for configuring bluetooth
enable bluetooth, enable pairing, find a device for pairing, enter the PIN code, test connectivity
11ports for SMTP
25/465/587
17ITU IMT-2020
5G speeds, 20 Gbps
18MDM
updates and secures mobile devices from a central location
19MAM
manages specific corporate mobile applications
21HTTPS port & uses...
443, TCP, connection oriented
22DHCPv4 server/client ports & uses...
server 67, client 68, UDP, connectionless
23FTP: OG / secure / TCP/UDP
21 / 989, 990 / TCP
24SSH: OG / secure / TCP/UDP
22 / 22 / either
25Telnet: OG / secure / TCP/UDP
23 / none / either
26SMTP: OG / secure / TCP/UDP
25 / 587, 465 / TCP
27DNS: OG / secure / TCP/UDP
53 / null / either
28DHCP: OG / secure / TCP/UDP
67, 68 / null / UDP
29HTTP: OG / secure / TCP/UDP
80 / 443 / TCP
30POP3: OG / secure / TCP/UDP
110 / 995 / TCP
31NetBIOS/NetBT: OG / secure / TCP/UDP
137-139 / null / either
32IMAP: OG / secure / TCP/UDP
143 / 993 / TCP
33SNMP: OG / secure / TCP/UDP
161 / null / UDP
34SNMPTRAP: OG / secure / TCP/UDP
162 / null / either
35LDAP: OG / secure / TCP/UDP
389 / 636 / either
36SMB: OG / secure / TCP/UDP
445 / null / TCP
37RDP: OG / secure / TCP/UDP
3389 / null / either
38what does a switch do
transmits data from two or more wired computers
39what does a router do
connects networks and makes forwarding decisions
40WAP usage and frequencies
transmits data between two or more wireless computers, 6, 5, or 2.4 GHz
41what is a firewall
provides controlled access between networks
42what do PoE devices include
PSE (power sourcing equipment) and PD (powered device)
43802.11a: max data rate / frequency
54 Mbps / 5 GHz
44802.11b: max data rate / frequency
11 Mbps / 2.4 GHz
45802.11g: max data rate / frequency
54 Mbps / 2.4 GHz
46802.11n: max data rate / frequency
600 Mbps / 5 or 2.4 GHz
47802.11ac: max data rate / frequency
3.5 Gbps / 5 GHz
48802.11ax: max data rate / frequency
9.6 Gbps / 5 and 2.4 GHz
49what does a DNS server do
resolves hostnames to IP addresses and vice versa
50what do file servers do
store, transfer, migrate, synchronize, and archive files
51what do web servers do
houses the website of an organization
52what do print servers do
take control of multiple printers on the network
53what do mail servers do
an email server like Microsoft Exchange
54what do proxy servers do
a go-between for a client and the website accessed, commonly used to store cache information, increases performance and efficiency
55what do DHCP servers do
in charge of handing out IP addresses to clients
56what do DNS servers do
takes care of resolving domain names to IP addresses
57what do Syslog servers do
stores logs in real time and is designed so that it is easy for admin to read, analyze, and save info
58what do AAA servers do
authentication, authorization, and accounting, focuses on security
59what does a load balancer do
provides for equal distribution of IP traffic among a set of servers
60difference between static and dynamic IP addresses
static is entered in a manually, dyanmic is assigned randomly