ccna 200-301 lammle

ccna 200-301 lammle.A significant number of access attacks are carried out through simple password guessing or brute force dictionary attacks against passwords. The use of encrypted or hashed authentication protocols, coupled with strong password policies, can significantly reduce the success rate of access attacks. Here are some specific ways you can help get a strong password policy.Disable the account after a certain number of failed login attempts. This method helps prevent successive password attempts.Do not use clear-text passwords. You can use a single-time password (OTP) or an encrypted password.Use a strong password. Strong passwords are at least 8 characters long and contain uppercase letters, lowercase letters, numbers, and special characters. The principle of minimal trust should also be designed into the network architecture, which means that one system cannot use other systems when it is not necessary. For example, if an organization has a trusted server used by an untrusted device (e.g., a Web server), the trusted server cannot unconditionally trust the untrusted device.Cryptography is a key component of all modern secure networks. The use of encryption for remote access to the network is a recommended practice. Also, routing protocol traffic should be encrypted; the more such traffic is encrypted, the less chance of a hacker using a man-in-the-middle attack to intercept the data.1.3.4.4 Mitigating DoS AttacksCompanies that are visible on the Internet should plan ahead for how to use the recommended mitigation techniques to counter potential DoS attacks. Historically, many DoS attacks have originated from fake source addresses. The use of anti-spoofing techniques on border routers and firewalls can thwart such attacks. Nowadays, many DoS attacks are distributed DoS attacks through compromised hosts on multiple networks. Mitigating DDoS attacks requires careful diagnosis, planning, and ISP cooperation. The most important components for mitigating DoS attacks are firewalls and IPSoCisco routers and switches support a variety of anti-spoofing technologies, such as port security, DHCP snooping > IP SourceGuard, Dynamic ARPInspection, and ACLoFinally, although QualityofService (QoS) is not designed as a security technology, one of its applications - traffic policing - can be used to limit traffic on an edge router. can be used to restrict incoming traffic from any given customer on an edge router, which limits the impact that a single source can have on ingress bandwidth usage.1.3.4.5 Protecting the Network