This chapter will lead you through the common application layer protocols and will make it easy for you to find any anomalies. You will understand and analyze the normal behavior of application layer protocols by looking at the most common protocols and understand their usual and unusual behaviors.
DNS—normal and unusual
Lab Up—DNS
FTP—normal and unusual
Lab Up
HTTP—normal and unusual
Lab Up—HTTP
SMTP—normal and unusual
Lab Up—SMTP
SIP—normal and unusual
Lab Up—SIP
VoIP—normal and unusual
Lab Up—VoIP
Decrypting encrypted traffic
Practice questions
We will cover some of the most common application layer protocols that govern today's networks, whether small or big. Without spending too much time, let me take you on this wonderful journey of protocols.