Layer 4
Compare the TCP header to the UDP
Discuss ports for TCP and UDP as the ‘addressing’ for layer 4. Referred to as multiplexing in the text.
Compare and contrast uses of UDP vs TCP
Discuss the purpose of DNS
Discuss the structure of DNS
Discuss URL
Discuss SSL
High level overview of Network security threats
DOS DDOS
Reconnaissance
Access
Threats to network
Access to Wifi
Infect Laptops
Disgruntled Employees
HAcker Tools
Scanner
SpyWare
Worm
Keystroke Logger
Phishing
Malware
Saved by ASA
Anti-virus: Scans network traffic to prevent the transmission of known viruses based on virus signatures.
Anti-spyware: Scans network traffic to prevent the transmission of spyware programs. Anti-spam: Examines e-mail before it reaches the users, deleting or segregating junk e-mail.
Anti-phishing: Monitors URLs sent in messages through the network, looking for the fake URLs inherent in phishing attacks, preventing the attack from reaching the users.
URL filtering: Filters web traffic based on URL to prevent users from connecting to inappropriate sites.
E-mail filtering: Provides anti-spam tools. Also filters e-mails containing offensive materials, potentially protecting the Enterprise from lawsuits.
Define VPN
Define IDS
Define IPS