Tag Archives: exam

Ports and Protocols Quiz for Network+

In celebration of my latest upcoming CompTIA Network+ Certification Guide – it is time for a ports and protocols quiz!

Ports and Protocols Quiz for CompTIA Network+

Enjoy this quiz covering some of the ports and protocols that you should know for the CompTIA Network+ exam.

1 / 11

What is the port number used by HTTPS?

2 / 11

What is the port number used by NTP?

3 / 11

What is the port number used by SSH?

4 / 11

What is the port number used by Secure FTP (SFTP)?

5 / 11

What is the port number used by DNS?

6 / 11

What is the port number used by TFTP?

7 / 11

What is the port number used by DHCP?

8 / 11

What is the port number used by syslog?

9 / 11

What protocol does DNS use in its operation?

10 / 11

What protocol does NTP use in its operation?

11 / 11

What protocol does SSH use in its operation?

Your score is

The average score is 84%

0%

Linux Fundamentals Notes

Here are some more notes as you prepare for the latest version of the Linux+ exam.

Controlling Hardware in Linux 

  • Linux actually refers to the kernel (core OS component)
  • The BIOS/UEFI starts the boot loader which starts the operating system kernel of Linux
  • The kernel coordinates actions between the hardware and the software
  • It runs in ring zero or often called kernel space
  • The user space tends to refer to everything out of the kernel space
  • The Linux kernel is tasked with driving the hardware in use
  • It exports data about the detected hardware using the /sys and /proc virtual file systems
  • Applications often access devices using the files created in /dev; specific files represent specific devices, for example: 
    • Disk drive – /dev/sda
    • Partition – /dev/sda1
    • Mice – /dev/input/mouse0
    • Keyboards – /dev/input/event0
    • Sound card – /dev/snd/*
    • Serial ports – /dev/ttyS*
  • You can tell which type of file you have (block versus character) when you list the files – note the use of the b or c character in the ls output