IOS Commands for (100-105) CCENT CCNA

[deanwebb]

IOS Commands for (100-105) CCENT CCNA

CDP...
Is it proprietary or open standard?
Is it datalink or network?
Which Cisco devices will it discover?

By default, is there any configuration on a Cisco device to run CDP?
What is the difference between "no cdp run" and "no cdp enable"?
What can be added to "show cdp neighbor" to include layer 3 addressing in the output of the command?

If all switches and routers in a network have CDP enabled, is it possible that a "show CDP neighbor" command typed on one of those devices will show all the devices in the network? Why or why not?

What protocol do Cisco phones use to identify themselves?

Name 6 things included in a CDP packet.

A router is having some issues and multiple network admins are connecting to it via SSH to examine the router. A sixth admin tries to connect via SSH, but is unsuccessful.
What default configuration on the router could be preventing his connection?
What could have been done on the router to permit more than 5 SSH connections?

A company has grown to the point where direct management of switches via console cables is no longer efficient. In order to enable the switches for remote management, what changes to the switch configurations are necessary?

What command can be used on a router to give its Fe0/0 interface an IP address of 10.1.1.1/24? What mode do you need to be in to issue that command?

What will be the expected results of each of the following commands:
A. router#show version
B. router#show ip interface
C. router#show protocols
D. router#show controllers
E. router#show running-config


What would be the operational reason to use each of the following commands?
A. R2(config-if)#clock rate
B. R2(config-if)#bandwidth
C. R2(config-if)#ip ospf cost
D. R2(config-if)#ip ospf priority
E. R2(config-router)#distance ospf

A technician is working on a router. He enters the command "reload in 15". Why did he do that? What command can he use to cancel the reload?

A technician is working on a router and has made some configuration changes. What command can he use to review the changes that he has made? What command can he use to commit those changes?

What is the difference between copy run start and write mem?

What information is shown in "show interfaces"?
What information is shown in "show ip interface"?
What information is shown in "show ip interface brief"?
What information is shown in "debug interface"?

An admin unboxes two brand new routers, powers them up, and connects them via a crossover cable. If he wants them to discover each other via CDP, what additional steps must he take? (one command per router)

How does the "ip helper-address" command work? Under what circumstances would it be used?

An admin wants to filter traffic on a specific host on a specific port with an ACL. Will he need a standard or extended ACL? Why?

If you wanted to be a bad admin and use an unencrypted, weak password for enable mode, what command would you use to configure that?
If you wanted to be a good admin and encrypt the enable password, what command would you use for that?
If you wanted to be the best admin and use an external TACACS server with an address of 10.1.1.1 for AAA, what commands would you use?