Computer Networking 3.4-.6
You are configuring a router that has a previous configuration. You need to turn CDP on for the entire router and turn it off for the serial 0/0/1 interface. Match each command on the left with its associated configuration task on the right.
1. Enter global configuration mode: router#config t 2. Turn CDP on for the router: router(config)#cdp run 3. Enter interface configuration mode: router(config)#int s0/0/1 4. Turn CDP off for the interface: router(config-if)#no cdp enable
One of the steps in the password recovery process for a router is to access the ROM monitor. Which of the following methods will accomplish this? (Select two.)
1. Remove the external flash memory while the device is powered off and then boot 2. Use a break sequence during the boot process.
You are physically seated at a host connected to the console of the Seattle router as shown in the exhibit. You need to know what IP address has been configured on the E0 interface on the New York router.
1. Telnet to New York. From privileged mode, type show interface E0. 2. Telnet to Toronto. From privileged mode, type show cdp neighbors detail.
You are troubleshooting a router at the console. You issued the following command at the CLI: pdx#debug arp You see debug output, but the output scrolls past faster than you can read. What two commands allow you to view debug output one page at a time? (Select two.)
1. logging buffered 2. show log
How does configuring banners add to the security of your router?
Banners provide a notice of intent, informing users that access is controlled or that activity may be logged.
Jaden is the network engineer at a branch office. There are non-Cisco devices on the network that Jaden would like to make sure are discovered by the Cisco router. Jaden has just enabled the Link Layer Discovery Protocol (LLDP) on the router. Which of the following is true about LLDP?
Configured on a per-interface basis.
You want to prevent users from accessing a router through a Telnet session. What should you do?
For the VTY lines, add the login parameter and remove any passwords.
You want users to enter a password before being able to access the router through a Telnet session. You use the following commands: router#config trouter(config)#line vty 0 4router(config-line)#password ciscorouter(config-line)#exitrouter(config)#exit You open a Telnet session with the router and discover that the session starts without being prompted for a password. What should you do?
In line configuration mode, add the login parameter.
Which of the following is the most important thing to do to prevent console access to the router?
Keep the router in a locked room
Which of the following protocols enables Cisco devices to discover non-Cisco devices?
LLDP
What is the main security weakness associated with the service password-encryption command?
Passwords are easily broken.
You are at a customer site and need to access their router. The previous administrator left the company and did not document the password to the device. Which of the following would you access to start the password recovery process?
ROMmon
You just installed a new router (RTR07) in a field office. As part of the initial setup, you want to configure a description for the eighth gigabit Ethernet interface. Which of the following would set the description to WAN to Main Office?
RTR07(config)#int gi0/8 RTR07(config)#description WAN to Main Office
To show all non-Cisco devices using LLDP, which of the following commands would you execute on a Cisco router?
Router#show lldp neighbors
During the initial setup of a router, which of the following commands would set the host name as LAS?
Router(config)#hostname LAS
The default amount of time that a device will hold information about its neighbors using LLDP is 120 seconds. Which of the following command allows you to change the value?
Router(config)#lldp holdtime [number of seconds]
You have just entered the configure terminal on a router and specified a gigabit interface. You want to disable CDP on that interface, but you want to keep CDP enabled on the device. Which of the following commands would you use?
Router(config-if)#no cdp enable no cdp enable disables CDP on the specified interface, but keeps CDP enabled for the device. no cdp run disables CDP for all interfaces on the device. cdp run enables CDP for all interfaces on the device. no cdp is an incomplete command.
For security reasons, you want to prevent the Toronto router from sharing any information about itself with neighboring devices. Which command should you run on the Toronto router?
Toronto#(config)#no cdp run
When you start up your router, you see the following messages: Have a nice day! The grass grows green User Access Verification Password: The sky is blue Router> For security purposes, you would like to change the message The grass grows green to read Only administrator access is allowed. Which command should you use?
banner login *Only administrator access is allowed*
Which of the following commands would you use to modify the CDP packet exchange interval to send CDP packets every 30 seconds?
cdp timer 30
After configuring a router to ignore the startup configuration when the device boots, what command would you use to tell the device to load the startup configuration upon boot?
confreg 0x2102
As part of the password recovery process on a router, you want the device to ignore the startup config file when the device is rebooted. Which of the following commands would you use to do this?
confreg 0x2142
Which of the following commands configures a password to switch to privileged EXEC mode and saves the password using MD5 hashing?
enable secret
While configuring a new router, you use the following commands: Router(config)#enable password ciscoRouter(config)#enable secret highwayRouter(config)#username admin password televisionRouter(config)#line con 0Router(config-line)#password airplaneRouter(config-line)#loginRouter(config-line)#line vty 0 4Router(config-line)#password garageRouter(config-line)#login Which password would you use to open a Telnet session to the router?
garage
You want to add a description to the first serial interface on the router. Which commands would you use?
int ser 0 description BOS to SFO
Following are three banner types that can be configured on a router: exec motd login If all three banners were configured, in which order would they display when a Telnet session is used to connect to the router?
motd, login, exec
If all three banners were configured, in which order would they display when a Telnet session is used to connect to the router?
motd, login, exec
After the completion of regularly scheduled maintenance on a router, you want to remove the message-of-the-day (MOTD) banner. Which command will accomplish that task?
no banner motd
During the initial setup of a switch, you accidentally typed the wrong hostname for the switch. The incorrect name was SwitchBldgC, and the correct name is SwitchBldgV. What command will undo the configuration change?
no hostname SwitchBldgC
You have a test lab that you use to test different configurations before deploying them in your live network. You have been testing several commands from configuration mode, then going back to enable mode to view the running configuration. Every time you exit configuration mode, the following output is displayed: %SYS-5-CONFIG_I: Configured from console by console What command can stop these messages from appearing on your screen?
no logging console
Which of the following commands disables LLDP globally on a Cisco device?
switch(config)#no lldp run
You would like to see logging message from IOS appear on the terminal. However, IOS does not send log messages to a terminal session over IP when using a remote SSH session. What command would send terminal output to the terminal session?
terminal monitor
