chapter 6 ccna answers

chapter 6 ccna answers.Disabling Unused Services Understand the role of the IOS feature AutoSecure.Configuring the RouterThe router interface must have an IP address or it will not process any IP packets. Be sure to be able to create a basic configuration for the router in a short amount of time, which includes assigning a host name, configuring privileged EXEC passwords and line passwords, creating a login flag, enabling the interface, assigning a clock frequency to the DCE serial interface, and assigning an IP address to the interface. The simulations may require you to do this on 3.5 routers, including enabling the routing protocol; be sure to take no more than 3 minutes to complete these basic tasks on each router. Don't forget to check connectivity on the hosts on the subnet to the IP address (default gateway) of the router belonging to that subnet. Be able to interpret the output of the command show ip interface brief; understand the purpose of the command ip subnet-zero Single-Arm RouterUnderstand how to configure a single-armed router, especially how to create subinterfaces and associate subinterfaces to VLANOs Don't forget that the switch and router must use the same trunking protocol: either both use 802.1Q, or both use ISLo The IP address of the subinterface is the default gateway address of the device in the VLAN to which the subinterface belongs.15.6 Authentication SummaryThe router's ROM contains the following components: the POST, bootloader, and ROM Monitor ( ROMMON ) o The POST performs hardware checks; the bootloader finds and loads the IOS; and ROMMON provides basic access to the router, allowing you to perform checks and troubleshoot.Configuration registers affect how the router boots. By default, it runs POST, loads the bootloader, looks for the IOS image, and executes the configuration file in that order. To modify this default boot method, use the boot system command or modify the configuration register values. The command show version displays the current configuration register value and the configuration register value at reboot. The configuration register value defaults to 0x2102; to perform password recovery, set it to 0x2142oEach router interface that is to handle IP traffic must have an IP address, which is configured on the interface using the command ip address. To view the status and configuration of the interface, use the command show ip interface briefoSingle-armed routers use a single trunk connection to the switch to route traffic between multiple VLANs. On a single-armed router, a subinterface must be created for each VLAN; on each subinterface, the command encapsulation isl|dotlq and a Layer 3 address must be configured.