Common Browser Shortcut (Chrome, Firefox, IE, Opera, Safari)

Here are some common keyboard shortcuts I found very useful when surfing the Web with Chrome, Firefox, IE, Opera, and Safari.

These keyboard shortcuts are essential in getting the most out of your chosen browser. These shortcuts can save a lot of time when browsing different sites from the internet.

Feel free to share any additional common browser shortcut you know in the comment section. 🙂

 

 

Common TCP and UDP Port Numbers

Port numbers are assigned to each services that run over transport protocols such as TCP and UDP ranging from 0 to 65535.

Port numbers are divided into three ranges:

0-1023: System Ports – assigned by IETF process, well-known port numbers
1024-49151: User Ports – are assigned by IANA, registered ports
49152-65535: Dynamic/Private Ports – not assigned, can be used by anyone

Port numbers 0 to 1023 are reserved for privelege and other prominent services.
Common port numbers include:

List of TCP port numbers

21: File Transfer Protocol [FTP]
22: Secure Shell [SSH]
23: Telnet remote login service
25: Simple Mail Transfer Protocol [SMTP]
80: Hypertext Transfer Protocol [HTTP]
110: Post Office Protocol [POP]
119: Network News Transfer Protocol [NNTP]
143: Internet Message Access Protocol [IMAP]
156: SQL Server
179: Border Gateway Protocol [BGP]
443: HTTP Secure [HTTPS]

List of UDP port numbers

53: Domain Name System [DNS]
67: Dynamic Host Configuration Protocol - Client [DHCP]
68: Dynamic Host Configuration Protocol - Server [DHCP]
69: Trivial File Transfer Protocol [TFTP]
161: Simple Network Management Protocol [SNMP]