introduction to ccna 200 301 with jeremy

introduction to ccna 200 301 with jeremy.c. replacing data with data of a different format and the same meaning and not modifying the net load d. replacing traffic with data of the same format and different meaning8. identify the following means that do not prevent traffic substitution and insertion attacks. 14.2 Encryption and Tunneling 491a. Unicode deblurringb. Use Unicode instead of ASCII c. Use formatting changes d. Properly handle extended characters9.Identify the following measures that do not prevent axial attacks. a. content filtering b. proper patch management c. network isolation d. access control10.Which of the following security techniques is best suited to detect an axial attack?a.Virtual private network (VPN) b.Host-based antivirus software c.NetFlow solution with network anomaly discovery d.Application layer firewall14.2 Encryption and Tunneling In the content of the SECFND exam, the definition of encryption is very simple a pair of something masked or encoded to prevent an unrelated person from learning its contents. The content can be network traffic, such as setting up a virtual private network (VPN), and encrypting traffic between two systems to prevent session eavesdropping. Encryption means that the file becomes unreadable unless the user is able to decrypt it. The word "encryption" may sound very "positive," but after successfully disrupting a victim's network, an attacker can "retreat" with encryption to hide data, or cover their tracks from the security tools. For example, encrypting an attack can make it undetectable to many signature-based detection techniques (e.g., intrusion prevention systems [IPS]). One common way to protect network traffic is to set up a virtual private network (VPN), whose primary purpose is to protect data in transit. VPN connections can be established between two or more sites, which is called a site-to-site VPN (site-to-site VPN).0 The purpose of building a site-to-site VPN is to interconnect two or more sites in a secure manner using an insecure channel. For example, a company needs to interconnect two branch offices located in different countries/regions. A site-to-site VPN can be set up so that employees at branch office A can access their laptop computers at branch office B.492 Chapter 14 Secure Evasion Techniquesresources at Branch B without changing any network settings. This means that Branch A and B will communicate with each other through an encrypted tunnel. Any uninvolved party cannot view the traffic, even if it is captured, because it cannot be decrypted.