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59 Cards in this Set
- Front
- Back
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Cisco supports two major types of switch operating systems: ???
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IOS and Cat OS
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IOS
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Internetwork Operating System
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Cat OS
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Catalyst Operating System
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Most Cisco Catalyst switch series today run only ______ operating system?
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IOS
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Three meanings of the SYST LED?
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OFF: switch is off
ON (GREEN): on and working ON (AMBER): POST failed and IOS did not load |
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Three popular ways to access switch CLI?
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console port, Telnet, SSH
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Rollover cable has what connectors?
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RJ-45, DB-9
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8N1 means?
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8-bit ASCII
No stop bits 1 parity bit |
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data rate for a PC's serial port connected to a switch's console port using default settings for the switch?
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9600 bytes/second
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hardware flow control should be (enabled / disabled) when connecting a PC's serial port to a switch's console port using default settings for the switch?
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disabled
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What about Telnet presents a security risk?
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It transmits all data as cleartext, including username and password for the switch.
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Telnet and SSH use what well-known TCP port numbers?
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SSH: 22
Telnet: 23 |
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By default a switch allows for access by which of the three methods (SSH/Telnet/console)
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console only
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vty
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virtual terminal
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switches support __ concurrent vty sessions
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16
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command to go to privileged mode
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enable
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command to go to user mode
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disable
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if the command prompt lists the hostname followed by a >, the user is in _____ mode, if it's a # the user is in _____ mode
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user, enable (or privileged, means same thing)
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command to set enable password
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enable secret 'password'
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T/F: if enable password is not set, IOS allows access for all to enable mode by default
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False
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T/F: if enable password is not set, IOS allows access to enable mode from console
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True
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difference between debug and show commands
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show = display information once
debug = information is displayed automatically when something changes in the system. debug turns on the messages for a particular item, "no debug" turns the messages off |
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how to disable a single debug option?
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repeat the same debug command with the same options, prefaced by the word "no"
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command to disable all current debugs
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no debug all
OR undebug all |
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command to check switch CPU utilization
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show process
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what does "terminal monitor" command do?
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allows debug messages to be sent out on vty lines
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What does the "interface" command do?
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subcommand to enter interface configuration mode
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Commands used in a specific context of configuration mode are called _____?
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subcommands
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How to enter global configuration mode from enable mode?
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"configure terminal"
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speed command does what / is effective where?
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sets inteface speed
is effective in interface configuration mode |
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line configuration mode allows configurations pertaining to what?
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the line used to reach the CLI, so console or 1 of the 16 vty lines
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how to end configuration mode and go back to priviliged EXEC mode?
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end / Ctrl-z
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the following prompt:
hostname(config-if)# means you are in what mode? |
interface configuration mode
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RAM stores?
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active configuration file
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ROM stores?
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bootstrap loader
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Flash memory stores?
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full IOS images, possibly other files such as configuration backups
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NVRAM stores?
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the initial / startup configuration file
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the file known as startup-config is stored where?
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NVRAM
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the file known as running-config is stored where?
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RAM
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most basic method of moving configuration files in and out of a switch is the _____ command
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copy
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"copy" can move files between which 3 locations?
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TFTP, RAM, NVRAM
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T/F: "copy"-ing a config file into RAM on a running switch gives the same result as if that config file was loaded at startup
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False
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T/F: "copy"-ing a config file to NVRAM or a TFTP server will erase the existing file in that location
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True
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What happens when a config is "copy"-ed into RAM?
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It acts as if each command in the config file was entered at the console in order
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"reload" does what?
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restarts the switch, erases RAM and copies the startup-config into RAM as part of the reload process
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3 commands to erase NVRAM
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write erase
erase startup-config erase nvram: |
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preferred command to erase NVRAM
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erase nvram:
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alternative names for startup-config
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nvram:
OR nvram:startup-config |
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alternative names for running-config
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system:running-config (there's only one alternative name)
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The switch will prompt the user if they want to enter setup mode after starting the switch if _________.
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The NVRAM is empty
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difference between "exit" and "end" configuration sub-modes
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exit - moves back to the next higher mode in configuration mode
end - exits configuration mode and goes back to enable mode from any of the configuration submodes |
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Ctrl-Z does the same thing as what command?
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"end"
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"setup" command
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enable mode command which places the user in setup mode (not configuration mode)
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"quit" command
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disconnects teh user from the CLI session
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The commands which can be entered in user or privileged mode are known as _____ commands
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EXEC
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user mode is also known as
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user EXEC mode
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privileged mode is also known as
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enabled mode
OR privileged EXEC mode |
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context-setting commands do what?
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move you from one configuration subcommand mode to another
*context-setting is not a cisco term |
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what is the meaning of colon character used, in example in the command, "erase nvram:"
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It refers to a filesystem. It can be thought of as similar to the drives in DOS, where every drive letter is followed by a ':' character.
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