CCNA 2 MODULE 3 Flashcards
What is the preferred command for password configuration on a router?
enable secret command
The enable secret command is encrypted and overrides the enable password.
What are the two status indications for router interfaces?
- interface (up/down)
- line protocol (up/down)
Both must be up for the links to work.
What command is used to configure a clock rate on a DCE device?
Router(config-if)#clock rate <link_speed(bps)>
One side of a serial link must be considered a DCE to provide a clocking signal.
What is the default encapsulation type on a Cisco router for serial links?
HDLC
High-Level Data Link Control is the default encapsulation used.
What command shows the configuration currently running in RAM?
Router#show running-config
It displays the active configuration of the router.
What does the command ‘show interfaces’ display?
Statistics for all the interfaces on the router
It can also be used with specific interfaces, e.g., show interfaces serial 0/1.
What is the command to display the saved configuration located in NVRAM?
Router#show startup-config
This command shows the configuration that the router will use on the next reboot.
True or False: The running configuration file can be erased.
False
The running configuration file can never be erased but can be reset to default by erasing the startup-config.
What is an interface description used for?
To notify important information such as a distant router, a circuit number, or a specific network segment.
Define host name resolution.
The process that a computer system uses to associate a host name with an IP address.
What command defines a static hostname-IP mapping?
ip host hostname [tcp-port number] address1 [address2…address8]
This command allows the configuration of a hostname to an IP address on the router.
What does the command ‘ip name-server’ do?
Defines one or more DNS servers.
What is the purpose of the loopback interface?
A virtual interface that is always up and allows sessions to stay active even if the outbound interface is down.
Fill in the blank: The command to enable the use of DNS is _______.
ip domain-lookup
What does the command ‘show hosts’ display?
A cached list of host names and addresses.
What are the two types of entries in the HOST table?
- Permanent (perm)
- Temporary (temp)
What command is used to erase the startup configuration?
erase startup-config
What is the function of the ‘show version’ command?
Displays information about the router and the IOS that is running in RAM.
What is the importance of configuration standards in networking?
Helps reduce network complexity, unplanned downtime, and exposure to performance-impacting events.
What does the ‘show memory’ command display?
Information about the memory usage on the router.
What should be done to back up router configurations?
List and compare configuration files, store them on network servers, and perform software installations and upgrades.
