Common Ports + Other Memorization for Net+

FTP (Active Mode)

TCP 20

FTP (Control)

TCP 21

SSH

TCP 22

SFTP

TCP 22

Telnet

TCP 23

SMTP (Text)

TCP 25

SMTP (TLS Encryption)

TCP 587

DNS

UDP 53

DHCP (Server)

UDP 67

DHCP (Client)

UDP 68

TFTP

UDP 69

HTTP

TCP 80

HTTPS

TCP 443

NTP

UDP 123

SNMP (Normal)

UDP 161

SNMP (Alerts)

UDP 162

LDAP

TCP 389

LDAPS

TCP 636

SMB

TCP 445

Syslog

UDP 514

Databses

TCP 1433

RDP

TCP 3389

SIP (Normal)

TCP 5060

SIP (Secure)

TCP 5061

POP3

TCP 110

802.11b standards

Wi-Fi 1: 2.4 GHz, 22 MHz, 11 Mbps

802.11a standards

Wi-Fi 2: 5GHz, 20 MHz, 54Mbps

802.11g standards

Wi-Fi 3: 2.4 GHz, 20 MHz, 54 Mbps

802.11n standards

Wi-Fi 4: 2.4/5 GHz, 40 MHz, 600 Mbps

802.11ac standards

Wi-Fi 5: 5 GHz, 150 MHz, 3.5 Gbps

Introduced MU-MIMO

802.11ax

Wi-Fi 6/6E: 2.4/5/6 GHz, 160 MHz, 9.6 Gbps

802.11be

Wi-Fi 7: 2.4/5/6 GHz, 320 MHz, 46 Gbps

MOU is between what parties?

Business and business

AUP is between what parties?

Business and employee/user

SLA is between what parties?

Business and customer

/24

254 hosts

/25

126 hosts

/26

62 hosts

/27

30 hosts

/28

14 hosts

/29

6 hosts

/30

2 hosts

0

Emergency

1

Alert

2

Critical

3

Error

4

Warning

5

Notice

6

Informational

7

Debug

Class A

1.0.0.0 to 126.255.255.255, designed for very large networks

Class B

128.0.0.0 to 191.255.255.255, designed for medium to large networks

Class C

192.0.0.0 to 223.255.255.255, designed for small networks

Class D

224.0.0.0 to 239.255.255.255, designed for multicasting (one-to-many routing)

Class E

240.0.0.0 to 255.255.255.255, reserved for research and future use

Cat 5

100 Mbps, 100 meters, 100MHz

Cat 5e

1 Gbps, 100 meters, 100 MHz

Cat 6

1/10 Gbps, 100/37-55 meters, 250 MHz

Cat 6a

10 Gbps, 100 meters, 500 MHz

Cat 7

10 Gbps, 100 meters, 1000 MHz

Cat 7a

10/40 Gbps, 100/50 meters, 1000 MHz

Cat 8

25/40 Gbps, 30 meters, 2000 MHz