1,001 CCNA Questions Chapter 4: Introduction to Cisco IOS

152. You have rebooted your Cisco switch and it displays an amber light on the system LED during POST. What does this indicate? (A) A failure during POST (B) System booted without fault (C) A successful POST (D) Failed communication with router

A. A failure during POST When the system LED is displaying an amber light it means that the device had a failure during POST and is not operating properly.

154. Which of the following best describes ROMMON? (A) A limited operating system used to troubleshoot startup and password recovery (B) Storage area to hold the startup configuration (C) Used to store the Cisco IOS (D) Storage area to hold the running configuration

A. A limited operating system used to troubleshoot startup and password recovery ROMMON is a limited operating system that is typically used to recover forgotten passwords. You enter ROMMON by restarting the router and pressing Ctrl-Break.

138. When you first boot up the Cisco router, where does it locate the startup configuration? (A) NVRAM (B) RAM (C) ROM (D) Flash

A. NVRAM The startup configuration is stored in permanent memory known as nonvolatile RAM (NVRAM).

129. You are configuring the DCE end of a point-to-point serial link between two routers. What extra command is typed on the DCE end of the link? (A) clock rate 64000 (B) encapsulation hdlc (C) ip address w.x.y.z (D) no shutdown

A. clock rate 64000 The clock rate command should be configured on the DCE end of a point-to-point serial link. Note that if you are connecting your serial port to the ISP, then they are the DCE end of the communication channel and will configure the clock rate.

141. What command would you use to navigate from priv exec mode to user exec mode? (A) disable (B) shutdown (C) enable (D) exit

A. disable The disable command is used to move from priv exec mode to user exec mode.

140. You are at the global configuration prompt and wish to configure a communication protocol for remote access to the router. What command would you type? (A) line vty 0 4 (B) line ssh 0 (C) line telnet 0 4 (D) line telnet 0

A. line vty 0 4 In order to configure remote access to the router, you will need to configure the telnet ports on the router. You can navigate to the telnet ports with the line vty 0 x command, where x is the last telnet port supported by your device.

143. What is the command to move to priv exec mode from user exec? (A) router>enable (B) router#enable (C) router(config)#enable (D) router#disable

A. router>enable In order to move to priv exec mode, you use the enable command from user exec mode.

139. You are connected to your switch and wish to remotely administer the Cisco router. Which command would you use? (A) telnet (B) enable (C) connect (D) rdp

A. telnet You use the telnet command to remotely connect to another switch or router for remote administration on that device.

158. Using the output below, what version of the Cisco IOS is running? Router>show version Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2) Technical Support:http://www.cisco.com/techsupport Copyright (c) 1986-2007 by Cisco Systems, Inc. Compiled Wed 18-Jul-07 06:21 by pt_rel_team (A) 2800 (B) 12.4 (C) 15 (D) T1

B. 12.4 Version 12.4 is the version of the IOS shown in the resulting output of the show version command.

157. Using this output of the show version command, how many Fast Ethernet ports exist on the router? Cisco 2811 (MPC860) processor (revision 0x200) with 60416K/5120K bytes of memory Processor board ID JAD05190MTZ (4292891495) M860 processor: part number 0, mask 49 2 FastEthernet/IEEE 802.3 interface(s) 4 Low-speed serial(sync/async) network interface(s) 239K bytes of NVRAM 62720K bytes of processor board System flash (Read/Write) Configuration register is 0x2102 Router> (A) 49 (B) 2 (C) 1 (D) 4

B. 2 There are two Fast Ethernet ports on this router. Note that there are 4 serial ports on the router as well.

147. What types of actions can an administrator perform at this IOS prompt? (Select two.) R1(config-if)# (A) Show running-config (B) Disable the interface (C) Show the IOS version (D) Change the hostname (E) Assign an IP address

B. Disable the interface E. Assign an IP address When you are at an interface prompt (config-if#) you can execute commands that apply to the interface, such as disabling the interface or assigning an IP address.

134. Which of the following are stored in ROM on the Cisco device? (A) Startup config (B) POST (C) Bootstrap (D) IOS (E) ROMMON (F) Running config

B. POST C. Bootstrap E. ROMMON ROM memory on a Cisco device is used to store the Power On Self Test (POST) routines, the bootstrap program, and the ROMMON.

132. You are trying to assign an IP address to the LAN port on the router and get the following message on the screen. Router(config)#interface e0 ^ % Invalid input detected at '^' marker. You use the show version command to try to identify the problem. The output is displayed below. What is the problem? Cisco 2811 (MPC860) processor (revision 0x200) with 60416K/5120K bytes of memory Processor board ID JAD05190MTZ (4292891495) M860 processor: part number 0, mask 49 2 FastEthernet/IEEE 802.3 interface(s) 4 Low-speed serial(sync/async) network interface(s) 239K bytes of NVRAM 62720K bytes of processor board System flash (Read/Write) Configuration register is 0x2102 Router> This means: (A) The interface is disabled. (B) The interface type specified does not exist. (C) You are at the wrong prompt. (D) The interface is already configured.

B. The interface type specified does not exist. Using the interface ID of "e" means you are referencing an Ethernet port (which is a 10 Mbps port). In this example, Fast Ethernet ports run at 100 Mbps and should be referenced with the ID of "f" or "Fa."

153. What happens when a router starts up and it does not have a startup configuration file? (A) The router prompts for a password. (B) The router prompts to enter setup mode. (C) The router applies a default configuration. (D) The router goes into global configuration mode.

B. The router prompts to enter setup mode. When the router cannot find the startup configuration, it prompts you to enter setup mode, also known as the initial configuration dialog. This will then walk you through the basic configuration of a Cisco router without you needing to know the commands.

133. Where is the running configuration stored? (A) NVRAM (B) VRAM (C) ROM (D) Flash

B. VRAM The running configuration is stored in volatile RAM ( VRAM).

149. Under what conditions would the initial configuration dialog appear? (A) When there is no running-config (B) When there is no startup-config (C) When you type initdialog (D) When you type setup

B. When there is no startup-config D. When you type setup The initial configuration dialog, also known as the setup mode, displays when a Cisco device starts up and there is no startup configuration file. The initial configuration dialog also appears when you type the setup command.

125. Which of the following port identifiers are used to reference a Fast Ethernet port? (Select two.) (A) s0/0 (B) f0/0 (C) con 0 (D) aux 0 (E) fa0/0

B. f0/0 E. fa0/0 When working on a router or switch, you can refer to a Fast Ethernet port by using an interface ID such as f0/0 or fa0/0.

142. You wish to get help on which parameters exist on the ping command. How would you get a list of parameters? (A) help ping (B) ping ? (C) ? ping (D) ?? ping

B. ping ? You can use the ? to get help from the Cisco IOS. If you use ? by itself you will get a list of available commands, and if you use it after the command you get a list of parameters.

144. Which of the following prompts represents global configuration mode? (A) router# (B) router(config)# (C) router> (D) router(global)#

B. router(config)# Global configuration mode is identified with (config)# in the prompt.

161. You wish to view the current value of the configuration register. What command would you use? (A) show reg (B) show version (C) show flash (D) show config

B. show version The show version command displays the current value assigned to the configuration register. The configuration register controls how your device boots.

128. You are performing a security audit on the network devices and have verified that the console port has a password configured. What other port should you verify has a password? (A) FastEthernet0/0 (B) FastEthernet0/1 (C) AUX (D) Serial0/0/0

C. AUX The AUX port should be configured with a password. If it is not, then it is possible that someone with a local access to your router can connect directly to the AUX port and bypass the security you placed on the console port.

160. You wish to verify the version of the Cisco IOS you are running. What command would you use? (A) Show IOS (B) Show memory (C) Show version (D) Show software

C. Show version The show version command displays some really important information regarding your Cisco device. It displays the version of the IOS you are running, the IOS image filename, the types of ports detected on the device, and the configuration register value.

150. You have connected a computer to the console port of a brand new router. What will the router display on the screen after it is powered on? (A) router> (B) POST errors (C) The option to enter initial configuration (D) router#

C. The option to enter initial configuration A brand new router does not have a startup configuration, so it will ask you to enter the initial configuration dialog so that you can configure the router.

124. Which of the following represents a purpose for the serial port on a Cisco router? (A) To connect to the LAN (B) To connect the console port (C) To connect to the WAN (D) To connect a modem

C. To connect to the WAN The serial port is typically used to connect to the WAN environment with an external CSU/DSU. You could also use the serial port to connect directly to the serial port of another router for a back-to-back serial link.

151. What is the purpose of the POST? (A) Locate the IOS in flash memory. (B) Locate the IOS in ROM. (C) Verify that hardware is functioning. (D) Apply the startup configuration.

C. Verify that hardware is functioning. The POST is the first step performed in the boot process and is responsible for verifying that the hardware is functioning.

131. What type of module can be purchased to install an internal CSU/DSU into the router? (A) WNA (B) WCI (C) WIC (D) WAC

C. WIC You can purchase a Wan Interface Card ( WIC) and install that in the router to add different ports to your router.

145. What is the default router name if a name is not assigned to the router during initial configuration? (A) R1 (B) switch (C) router (D) default

C. router The default configuration applied to a new router will have the name router if a name has not been configured.

148. You wish to run the initial configuration dialog. What command would you use? (A) install (B) dialog (C) setup (D) initdialog

C. setup The initial configuration dialog, also known as the setup mode, can be launched at any time by typing the setup command.

146. What command would you use to navigate to global configuration mode? (A) >config terminal (B) #setup (C) >enable (D) #config terminal

D. #config terminal Once in priv exec mode, you can type the config terminal command to navigate to global configuration mode.

156. What keystroke is used to access the ROMMON prompt in order to bypass the password? (A) Ctrl-Alt-Del (B) Ctrl-Del (C) Ctrl-Enter (D) Ctrl-Break

D. Ctrl-Break On startup, if you press Ctrl-Break you will interrupt the normal startup of the Cisco device and will be placed in the ROMMON prompt. This process is typically used to recover the password of the Cisco devices.

135. What type of memory is shown here? (A) VRAM (B) NVRAM (C) ROM (D) Flash

D. Flash Flash memory holds the Cisco IOS and is typically added to the device with a flash memory card, as shown in the figure.

137. When the Cisco router starts up, where does it find the Cisco IOS? (A) NVRAM (B) RAM (C) ROM (D) Flash

D. Flash The IOS image file is stored in flash memory and is loaded from flash memory into RAM during the bootup process.

155. Which of the following best identifies the boot order of a Cisco device? (A) Bootstrap loads IOS from flash: POST: apply startup configuration to running config. (B) Bootstrap loads IOS from flash: apply startup configuration to running config: POST. (C) POST: apply startup configuration to running config: bootstrap loads IOS from flash. (D) POST: bootstrap loads IOS from flash: apply startup configuration to running config.

D. POST: bootstrap loads IOS from flash: apply startup configuration to running config When a device boots up, the POST first verifies the hardware, and then the bootstrap program loads the IOS image file from flash memory. Once the IOS has been loaded, the startup configuration is read from NVRAM and copied to the running configuration.

126. What type of cable is used to connect to the console port? (A) Crossover (B) Straight-through (C) Null modem (D) Rollover

D. Rollover The rollover cable, also known as a console cable, is used to connect a system to the console port.

130. The external CSU/DSU connects to which port on the router? (A) FastEthernet0/0 (B) Con 0 (C) Aux 0 (D) Serial0/0/0

D. Serial0/0/0 The serial port is used to connect to a WAN environment and is typically connected to an external CSU/DSU if you do not have an integrated CSU/DSU in the router.

127. Your manager notices an AUX port on the back of the Cisco router and asks what it is used for. How would you reply? (A) To connect a CSU/DSU (B) To connect an external Ethernet interface (C) To connect an internal Ethernet interface (D) To connect a modem

D. To connect a modem The AUX port is used to connect a modem to the router. This modem can be used as a method to remotely connect to the router and fix any problems with the configuration.

136. Which commands can you use to save the running configuration to the startup configuration? (Select two.) (A) copy startup-config running-config (B) save running-config startup-config (C) save running-config (D) copy running-config startup-config (E) write

D. copy running-config startup-config E. write In order to save the running configuration to more permanent memory, use the copy running-config startup-config command or the write command.

159. Your manager is wondering how many Fast Ethernet ports are on the router. What command would you use to find that out? (A) show help (B) show modules (C) show fastethernet (D) show version

D. show version The show version command displays the types of ports detected on the device and how many of each type of port. Note that it also displays some important information regarding your Cisco device, such as the version of the IOS you are running, the IOS image filename, and the configuration register value.