OSI Layer 7

• Introduction to DNS
• FQDN
• DNS Record Format
• SOA Records
• A/AAAA Records
• PTR Records
• CNAME Records
• MX Records
• SRV Records
• DNS Resolution
• DNS Request
• DNS Tiers
• Dig
• Dig Output
• Introduction to HTTP
• HTTP Requests
• HTTP Responses
• HTTP Status Codes