cisco 200-301 brain dump

cisco 200-301 brain dump.Basic TroubleshootingKnow which router commands to use when troubleshooting the various layers of the OSI reference model. Know how the CDP (including its timer) works and what information it shares with directly connected Cisco devices. Be able to display CDP tables on an IOS device and read the output. Know how to troubleshoot Layer 3 using ping and traceroute ---------- Start by examining the TCP/IP stack of the user's computer. Understand the various response messages you may see when using the command ping and what they mean in terms of troubleshooting. Know how to configure VTY to support Telnet access and be able to determine if the associated configuration is correct. Remember how to hang and resume Telnet sessions on an IOS device and how to display open sessions. Know how to disable the debug command on an IOS device.Chapter 16 Managing IOS Devices 419There are two types of licensing licenses: evaluation licenses and perpetual licenses. Licenses are associated with the serial number of the IOS device and therefore cannot be moved to another device by default. The command license install installs a new license. To view the installed and active licenses on an IOS device, use the commands show version and show licensee16.7 Authentication SummaryTo manipulate files, including configuration files and IOS images, use the copy command. When copying things to RAM, the IOS is merged; when copying elsewhere, the IOS is overwritten. On IOS devices, the command erase startup-config can be used to remove the startup configuration file from NVRAM. When accessing the router from a remote terminal (CLI), SSH should be used instead of Telnet, because SSH encrypts the traffic transmitted between the desktop and the IOS device.CDP is a Cisco-specific protocol that runs at the data link layer. Every 60 seconds, the Cisco device generates a multicast on each of its interfaces that contains basic information about the device, including the device type, the software version it is running, and the IP address. To globally disable CDP, use the command no cdp run; to display a list of neighbors, use the command show cdp neighborsoThe ping and traceroute commands contain extended versions that can only be executed in privileged EXEC mode. To hang an active Telnet session, press Ctrl-Shift-6 and x in sequence. press Enter when the command line is empty to resume the last hung Telnet session. To resume a specific Telnet connection, use the command resumeo To view open Telnet sessions, use the command show sessionso To disconnect a pending Telnet session, use the command disconnect To disable debugging on an IOS device, use the command undebug all or no debug allo The debugging feature can only be used in privileged EXEC mode.Starting with IOS version 15.0, the ISR G2 router must have a license to operate. There are two types of licenses: evaluation licenses and perpetual licenses. To install a permanent license, use the command license install. to view the licenses installed on the router, use the commands show version and show license.16.8 Two-Minute Sprint