Chapter 6 - Basic Switch Management

Question 1

line console 0

Answer 1

Changes the context to console configuration mode

Question 2

line 0 15 vty

Answer 2

vty config mode for range defined in command

Question 3

login

Answer 3

Console and vty config mode - Tell IOS to prompt for password

Question 4

password [pass-value]

Answer 4

Console and vty config mode - lists passwords required if the login command (with no other parameters) is configured

virtual teletype

Question 5

login local

Answer 5

Console and vty config mode. Tells IOS to prompt for username and password, to be checked against locally configured username global config commands on this switch or router

Question 6

username [name] secret [pass-value]

Answer 6

Global command. Defines on of possibly multiple usernames and associated passwords. Used when the “login local” command has been used.

Question 7

crypto key generate rsa [modulus 360…2048]

Answer 7

Global command. Creates and stores (in a hidden location in flash memory) the keys required by SSH

Question 8

transport input [telnet | ssh | all | none]

Answer 8

vty line config mode. Defines whether telnet/ssh access is allowed into the switch. Both can be configured on one line

Question 9

interface vlan [number]

Answer 9

Changes the context to VLAN interface mode.

Question 10

ip address [ip-address subnet-mask]

Answer 10

VLAN interface mode. Statically configures the switches IP address and mask.

Question 11

ip address dhcp

Answer 11

VLAN interface mode. Configures the switch as a DHCP client to discover its IPv4 address, mask, and default gateway.

Question 12

ip default gateway [address]

Answer 12

Global command. Configures the switch’s default gateway IPv4 address. Not required if the switch uses DHCP

Question 13

ip name-server [server 1] [server 2]

Answer 13

Global command. Configures the IPv4 address of DNS servers, so any commands when logged in to the switch will use the DNS for name resolution.

Question 14

hostname [name]

Answer 14

Global command. Sets the switch’s hostname.

Question 15

enable secret [pass-value]

Answer 15

Global command. Sets the switch password for access to “enable” mode

Question 16

history size [length]

Answer 16

line config mode. Defines the number of commands held in the history buffer

Question 17

logging synchronous

Answer 17

Console or vty mode. Tells IOS to send log messages to the user at natural break points between commands.

Question 18

[no] logging console

Answer 18

Global command that disables or enables the display of log messages to the console

Question 19

exec-timeout [minutes] [seconds]

Answer 19

Console or vty mode. Sets the inactivity timeout

Question 20

show running-config

Answer 20

Lists the currently used config

Question 21

show running-config | begin line vty

Answer 21

Pipes (sends) the command output to the “begin” command, which only lists output beginning with the first line that contains the text “line vty”

Question 22

show dhcp lease

Answer 22

Lists any info the switch acquires as a DHCP client.

Question 23

show crypto key mypubkey rsa

Answer 23

Lists the public and shared key created for use with SSH using the “crypto key generate rsa” global config command

Question 24

show ip ssh

Answer 24

Lists status info for the SSH server, including the SSH version

Question 25

show interfaces vlan [number]

Answer 25

Lists the interface status, the switch’s IPv4 address and mask

Question 26

show ip default-gateway

Answer 26

Lists the switch’s setting for its IPv4 default gateway

Question 27

terminal history size [x]

Answer 27

Changes the length of the history buffer for the current user only, only for the current login to the switch