ccna 200-301 official cert guide amazon

ccna 200-301 official cert guide amazon.$(line)------ displays the vyt or tty (asynchronous) line number.S(line-desc)------- displays the description of the connected line. Because command flags provide additional messages to potential attackers, use extreme caution when using them in flagged messages.2.1.4 Configuring SSH2.1.4.1 Configuring SSH before implementing itWhen initiating remote management access, consider the security risks of sending information over the network. Traditionally, remote access to the router is configured using Telnet on TCP port 23. However, Telnet was developed in an era when security was not an issue, so all Telnet traffic was forwarded using plaintext. Using this protocol, critical data (such as the router's configuration) is easily accessible to an attacker. Hackers can use protocol analysis software (such as Wireshark) to capture packets sent by the administrator's computer. If the initial Telnet traffic is obtained, then the attacker can learn the administrator's username and password.Although remote access introduces vulnerabilities to the network, it can save a company time and money when making necessary configuration changes. How can you establish a secure remote access connection to manage CiscoIOS devices?SSH instead of TelnetB has become a recommended practice for providing remote router management. SSH connections can support confidentiality and session integrity and function similarly to out-of-band Telnet connections, but the connection is encrypted and runs on port 22. With authentication and encryption capabilities, SSH allows secure connections to be established over insecure networks.2.1 Protecting Access to Devices 33Before configuring the router for the SSH protocol, there are 4 steps to complete. Step 1 Ensure that the target router is running a CiscoIOS version that supports SSHo Step 2 Ensure that the target router has a unique host name. Step 3 Ensure that the target router is using the correct network domain name. Step 4 Ensure that the target router is configured with a local authentication or AAA service for username and password authentication. This is mandatory for router-to-routerSSH connection is mandatory.