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49 Cards in this Set
- Front
- Back
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Telnet |
The standard terminal-emulation application layer protocol stack. Telnet is used for remote terminal connection, enabling users to log in to remote systems and use resources as if they were connected to a local system. Telnet is defined as RFC 854.
(Wendell, 2013 Sect. Glossary) |
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SSH
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A TCP/IP application layer protocol that supports terminal emulation between a client and server, using dynamic key exchange and encryption to keep the communication private.
(Wendell, 2013 Sect. Glossary) |
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local Username
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A username (with matching password), configured on a router or switch. It is considered local because it exists on the router or switch, and not on a remote server.
(Wendell, 2013 Sect. Glossary) |
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VLAN interface
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A configuration concept inside concept inside Cisco switches, used as an interface between IOS running on the switch and a VLAN supported inside the switch , so that the switch can assign IP address and send IP packets into the VLAN.
( Wendell, 2013 Sect. Glossary) |
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Port Security
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A Cisco switch feature which the switch watches Ethernet frames that come in an interface (port), tracks the source MAC address of all such frames, and takes a security action if the number of different such MAC address is exceeded.
(Wendell, 2013 Sect. Glossary) |
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Console, Telnet and SSH Login Commands
line console 0 |
Changes the context to console configuration mode
(Wendell, 2013 p.230) |
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line vty
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Changes the context to vty configuration mode for the range of vty lines listed in the command
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Login
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Console and vty configuration mode. Tells IOS to prompt for password
(Wendell, 2013 p.230) |
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Console, Telnet and SSH Login Commands
password |
Console and vty configuration mode. List the password required if the login command with (no other parameters) is configured
(Wendell, 2013 p.230) |
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Console, Telnet and SSH Login Commands
login local |
Console ant vty configuration mode. Tells IOS to prompt for a username and a password, to be checked against locally configured username global configuration commands on a witch and router.
(Wendell, 2013 p.230) |
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Console, Telnet and SSH Login Commands
username (place username here) secret (place pass-value here) |
Global command. Defines one of possibly multiple user names and associated passwords, for user authentication. Used when the login local line configuration command has been used.
(Wendell, 2013 p.230) |
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Console, Telnet and SSH Login Commands
crypto key generate rsa |
Global command. Creates and stores (in a hidden location in flash memory) the keys required by SSH.
(Wendell, 2013 p.230) |
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Console, Telnet and SSH Login Commands
transport input {telnet |SSH|all|none} |
vty line configuration mode. Defines whether Telnet and/or SSH access is allowed into this switch. Both values can be configured on one command to allow both Telnet and SSH access (the default)
(Wendell, 2013 p.230) |
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Console, Telnet and SSH Login Commands
service password-encryption |
Global command that weakly encrypts passwords defined by username password, enable password, and login commands.
(Wendell, 2013 p.230) |
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Command Reference Switch IPv4 Configuration
interface vlan |
Changes the context to VLAN interface mode. For VLAN 1, allows the configuration of the switch's IP address
(Wendell, 2013 p.231) |
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Command Reference Switch IPv4 Configuration
ip address |
VLAN interface mode, statistically configures the switch's IP address and mask
(Wendell, 2013 p.231) |
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Command Reference Switch IPv4 Configuration
ipaddress dhcp |
VLAN interface mode. Configures the switch as a DHCP client to discover its IP address, mask and default gateway.
(Wendell, 2013 p.231) |
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Command Reference Switch IPv4 Configuration
ip default gateway |
Global Command. Configures the switch default gateway IP address. Not required if the switch uses DHCP.
(Wendell, 2013 p.231) |
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Command Reference Switch IPv4 Configuration
ip name-server |
Global command. Configures the IP address(es) of DNS servers, so any commands when logged into the switch will use the DNS for name resolution
(Wendell, 2013 p.231) |
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Command Reference Switch interface Configuration
interface [type port number here] |
changes context to interface mode. The type is typically FastEthernet or Gigabit Ethernet. The possible port numbers vary depending on the model of switch - for example, Fa0/1 Fa0/2 and so on.
(Wendell, 2013 p.231) |
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Command Reference Switch interface Configuration
interface range [type port range here] |
Changes the context to interface mode for a range of consecutively numbered interfaces. The sub commands that follow then apply to all interfaces in the range.
(Wendell, 2013 p.231) |
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Command Reference Switch interface Configuration
shutdown no shutdown |
Interface mode. Disables or enables the interface respectively.
(Wendell, 2013 p.231) |
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Command Reference Switch interface Configuration
speed |10|100|1000|auto |
Interface mode. Manually sets the speed to the listed speed, or with the auto setting, automatically negotiates speed.
(Wendell, 2013 p.231) |
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Command Reference Switch interface Configuration
duplex [auto|ful|half] |
Interface mode. Manually sets the duplex to half or full, or to autonegotiate the duplex settings.
(Wendell, 2013 p.231) |
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Command Reference Port Security
switchport mode [access|trunk|negotiate] |
Interface configuration mode command that tells the switch to always be an access port, or always be a trunk port, or to negotiate which to be.
(Wendell, 2013 p.232) |
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Command Reference Port Security
switchport port-security mac-address |
Interface configuration mode command that statically adds a specific MAC address as an allowed MAC address on the interface.
(Wendell, 2013 p.232) |
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Command Reference Port Security
switchport port-security mac-address sticky |
Interface subcommand that tells the switch to lean MAC addresses on the interface and add them to the configuration for the interface as secure MAC addresses.
(Wendell, 2013 p.232) |
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Command Reference Port Security
switchport port-security violation [protect|restrict|shutdown} |
Interface subcommand that tells the switch what to do if an inappropriate MAC address tries to access the network through a secure switch port
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
hostname |
Global Command. Sets the switch's host name, which is also used as the first part of the switch's command prompt
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
enable secret |
Global Command. Sets this switch's password that is required for any user to reach the enable mode
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
history size |
Line Config mode. Defines the number of commands held in the history buffer, for later recall, for users of those lines
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
logging synchronous |
Console or vty mode. Tells IOS to send log messages to the user at natural break points between commands, rather than in the middle of a line output.
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
[no] logging console |
Global command that disables or enables the display of log messages to the console.
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
exec-timeout |
Console or vty mode. Sets the inactivity timeout, so that after the defined period of no action, IOS closes the current user login session
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
switchport access vlan |
Interface subcommand that defines the VLAN in which the interface resides
(Wendell, 2013 p.232) |
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Command Reference other switch Configuration
Banner [motd |exe|Login] |
Global command that defines a banner that is displayed at different times when users log in to the switch or router.
(Wendell, 2013 p.232) |
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EXEC Command Reference
show running-config |
lists currently used configuration
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EXEC Command Reference
show runnning -config |begin line vty |
Pipes (sends) the command output to the begin command, which only lists output beginning with the first line that contains the text "line vty"
(Wendell, 2013 p.233) |
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EXEC Command Reference
show mac address-table dynamic |
list the dynamically learned entries in the switch's address (forwarding table).
(Wendell, 2013 p.233) |
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EXEC Command Reference
show dhcp lease |
Lists any information the switch acquires as a DHCP client. This includes IP address, subnet mask, and default gateway information.
(Wendell, 2013 p.233) |
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EXEC Command Reference
show crypto key mypubkey rsa |
List the public and shared key created for use with SSH using the crypto key generate rsa global configuration command.
(Wendell, 2013 p.233) |
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EXEC Command Reference
show ip ssh |
List status information for current SSH server, including the SSH version
(Wendell, 2013 p.233) |
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EXEC Command Reference
show interfaces status |
List one output output line per interface, noting the description, operating state, and settings for duplex and speed on each interface.
(Wendell, 2013 p.233) |
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EXEC Command Reference
show interface vlan 1 |
Lists the interface status, the switch's IP address and mask, and much more
(Wendell, 2013 p.233) |
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EXEC Command Reference
show ip default-gateway |
Lists the interface status, the switch's IP address and mask and much more.
(Wendell, 2013 p.233) |
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EXEC Command Reference
show port-security interface |
List the interface's port security configuration settings and security operational status
(Wendell, 2013 p.233) |
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EXEC Command Reference
terminal history size |
Changes the length of the history buffer for the current user only, only for the current login to the switch
(Wendell, 2013 p.233) |
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EXEC Command Reference
show history |
Lists the command of the current history buffer
(Wendell, 2013 p.233) |
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Command Reference Switch interface Configuration
description |
Interface mode. Lists any information text that the engineer wants to track for the interface, such as the expected device on the other end of the cable.
(Wendell, 2013 p.231) |
