Linux Server and Network Security Quiz

What does LUKS encryption protect on a Linux server?

• Network speed

• Disk contents

• Firewall settings

• Software licenses

Why was the encrypted volume in Lab 1 unreadable?

• The disk was removed

• The encryption header was corrupted

• The file system was Windows-based

• Someone changed the DNS settings

What command is used to unlock LUKS volumes?

• mount -unlock

• cryptsetup luksOpen

• luksheader open

• decrypt-mount

What is the purpose of firewall-cmd in Linux?

• Encrypt disks

• Start servers

• Configure firewall rules

• Enable SSH

In Lab 2, why didn’t the specific allow rule work at first?

• It was blocked by a general rule

• The server was off

• DNS failed

• No volume was mounted

What port is used by HTTP traffic?

• 22

• 80

• 443

• 3306

What does DNS do?

• Translates domain names to IP addresses

• Blocks firewall traffic

• Hosts MongoDB databases

• Configures encryption headers

Which file lists which name service modules are used?

• /etc/hosts

• /etc/nsswitch.conf

• /etc/iptables.conf

• /var/log/dns.log

What command did students use to test a DNS server manually?

• dig @IP_ADDRESS domain.com

• traceroute DNS

• dns-check domain

• openresolv

What happened to the MongoDB service in Lab 4?

• DNS failed

• It crashed and wouldn’t start

• The port was blocked

• User credentials were wrong