ccna 200-301 sample exam

ccna 200-301 sample exam.ACLs that allow synchronization with other network devices, this authentication mechanism mitigates the risk of attacks. To protect NTP traffic, it is highly recommended that NTPv3 or higher be used. Use the following commands on the NTP master server and clients.ntpauthenticatentpauthentication-key key-number md5 key-value2.3 Monitoring and Managing Devices 51The ntptrusted-key key-number authentication mechanism is designed to ensure that clients can obtain time from an authenticated server. Clients that are not configured for authentication can still get time from the server. The difference is that the client cannot verify that the server is a secure source.The show ntpassociations detail command can be used to determine that the server is an authenticated source. Note: The key-number value can also be set as an argument in the ntpserver ntp-server-address command.2.3.5.4 Enabling NTP with CCPCCP allows the network administrator to view configured NTP server information, add new information, and edit or delete existing information. NTP servers can be added using CCP by following the steps below. Step 1 In the Cisco Configuration Expert menu bar, select Configure >Router>Time>NTP andSNTP. step 2 The NTP column appears, displaying information about all configured NTP servers. To add a new NTP server, click the Add button.The AddNTPServer Details dialog box appears.Step 3 Add the NTP server by name (if the router is configured to use Domain Name System servers) or IP address. If you want to add an NTP server using an IP address, enter the IP address in the field near the NTP Server IP Address option. If the organization does not have an NTP server, the administrator may want to use a publicly owned server.