Module 2 Exam Review

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Module 2 Exam Review

• Version 3.1 2006/2007

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2.1.2 Router user interface

• To establish a Telnet session to the router, at
  least one interface must be configured with an IP
  address, and virtual terminal sessions must be
  configured for login and passwords.
• Network functionality must already be established
  to use Telnet
• A console uses a low speed serial connection
  directly from a computer or terminal to the
  console connection on the router.

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2.1.3 Router user interface modes

• The Cisco CLI uses a hierarchical structure. This
  structure requires entry into different modes to
  accomplish particular tasks.
• The user EXEC mode allows only a limited number
  of basic monitoring commands. The user EXEC level
  does not allow any commands that might change the
  configuration of the router. The user EXEC mode
  can be identified by the gt prompt.
• The privileged EXEC mode provides access to all
  router commands. This mode can be configured to
  require a password. For added protection, it can
  also be configured to require a user ID. The
  privileged EXEC mode can be identified by the
  prompt.

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2.1.4 Cisco IOS software features

• The naming convention for the different Cisco IOS
  releases contains three parts
• The platform on which the image runs
• The special features supported in the image
• Where the image runs and whether it has been
  zipped or compressed

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2.1.5 Operation of Cisco IOS software

• After the active IOS image has been loaded into
  RAM from flash memory, the show version command
  and the show flash command could be used to
  display the file name of the active IOS

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2.1.5 Operation of Cisco IOS software

• The Cisco IOS devices have three distinct
  operating environments or modes
• ROM monitor
• Boot ROM
• Cisco IOS
• The ROM monitor mode is used to recover from
  system failures and to recover a lost password.

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2.2.1 Initial startup of Cisco routers

• A router initializes by loading the bootstrap,
  the operating system, and a configuration file.

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2.2.1 Initial startup of Cisco routers

• The router enters setup mode under the following
  conditions
• After issuing the command Routersetup
• During the initial configuration of a router
• After deleting the backup configuration and
  reloading the router

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2.2.1 Initial startup of Cisco routers

• The default sequence for loading the
  configuration file is
• The configuration file saved in NVRAM is loaded
  into main memory and executed one line at a time.
  
• If no valid configuration file exists in NVRAM,
  the operating system searches for an available
  TFTP server. If no TFTP server is found, the
  setup dialog is initiated.

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2.2.1 Initial startup of Cisco routers

• The command sh? returns as output if issued at
  the Router prompt the following
• all commands beginning with the letters sh

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2.2.4 Establish a console session

• Take the following steps to connect a terminal to
  the console port on a router
• Connect the terminal using the RJ-45 to RJ-45
  rollover cable and an RJ-45 to DB-9 adapter.
• Configure the terminal or PC terminal emulation
  software for 9600 baud, 8 data bits, no parity, 1
  stop bit, and no flow control.

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2.2.5 Router login

• Two commands can be used to set a password used
  to access privileged EXEC mode
• enable password and enable secret.
• If both commands are used, the enable secret
  command takes precedence.

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2.2.6 Keyboard help in the router CLI

• The --More-- prompt indicates that there are
  multiple screens of output.
• When a --More-- prompt appears, press the
  Spacebar to view the next available screen.
• To display just the next line, press the Return
  or Enter key.
• Press any other key to return to the prompt.

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2.2.7 Enhanced editing commands

• Some of the editing commands are as follows
• Ctrl-A moves to the beginning of the command
  line.
• Ctrl-B moves back one character.
• Ctrl-E moves to the end of the command line.
• Ctrl-F moves forward one character.
• Ctrl-Z moves back out of configuration mode.
• Esc and then B moves back one word.
• Esc and then F moves forward one word.

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2.2.8 Router command history

• The command history feature can be used to
  perform the following tasks
• Set the command history buffer size
• Recall commands
• Disable the command history feature

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2.2.10 The show version command

• the show version command provides us with the
  following information
• IOS version and descriptive information
• Bootstrap ROM version
• Boot ROM version
• Router up time
• Last restart method
• System image file and location
• Router platform
• Configuration register setting