What function does dns play on a network what is http what

Question

Assignment: Networking

• What did you learn yesterday/this week?

• Talk about your preferred development/administration environment. (OS, Editor, Browsers, Tools etc.)

• Tell me about the last major Linux project you finished.

• Tell me about the biggest mistake you've made in [some recent time period] and how you would do it differently today. What did you learn from this experience?

• Why we must choose you?

• What function does DNS play on a network?

• What is HTTP?

• What is an HTTP proxy and how does it work?

• Describe briefly how HTTPS works.

• What is SMTP? Give the basic scenario of how a mail message is delivered via SMTP.

• What is RAID? What is RAID0, RAID1, RAID5, RAID10?

• What is a level 0 backup? What is an incremental backup?

• Describe the general file system hierarchy of a Linux system.

Simple Linux Questions:

• What is the name and the UID of the administrator user?

• How to list all files, including hidden ones, in a directory?

• What is the Unix/Linux command to remove a directory and its contents?

• Which command will show you free/used memory? Does free memory exist on Linux?

• How to search for the string "my konfi is the best" in files of a directory recursively?

• How to connect to a remote server or what is SSH?

• How to get all environment variables and how can you use them?

• I get "command not found" when I run ifconfig -a. What can be wrong?

• What happens if I type TAB-TAB?

• What command will show the available disk space on the Unix/Linux system?

• What commands do you know that can be used to check DNS records?

• What Unix/Linux commands will alter a files ownership, files permissions?

• What does chmod +x FILENAMEdo?

• What does the permission 0750 on a file mean?

• What does the permission 0750 on a directory mean?

• How to add a new system user without login permissions?

• How to add/remove a group from a user?

• What is a bash alias?

• How do you set the mail address of the root/a user?

• What does CTRL-c do?

• What is in /etc/services?

• How to redirect STDOUT and STDERR in bash? (> /dev/null 2>&1)

• What is the difference between UNIX and Linux.

• What is the difference between Telnet and SSH?

• Explain the three load averages and what do they indicate. What command can be used to view the load averages?

• Can you name a lower-case letter that is not a valid option for GNU?