| To help you prepare for total success on your Cisco | | | | This may seen trivial, but when you have a long |
| certification exams, here's a new set of CCNA, | | | | command entry interrupted by a console message, |
| CCNP, Security, and CCENT practice exam questions! | | | | you'll wonder how to prevent that from happening. |
| Answers are at the bottom of the page. Enjoy! | | | | (After you stop yelling at the router, that is.) |
| CCNA Certification: | | | | By configuring the logging synchronous command on |
| What command results in the following output? | | | | the console port, you're telling the router to hold such |
| R3# | | | | messages until it detects no input from the keyboard |
| 00:11:37: RIP: received v2 update from 172.12.123.1 on | | | | and no other output from the router, such as a show |
| Serial0 | | | | command's output. |
| 00:11:37: 172.12.123.0/24 via 0.0.0.0 in 1 hops | | | | R1(config)#line console 0 |
| CCENT Certification: | | | | R1(config-line)#logging ?synchronous Synchronized |
| What's the basic purpose of the logging synchronous | | | | message output |
| command? | | | | CCNA Security / CCNP ISCW Exam: Answer: The |
| CCNA Security Certification / CCNP ISCW Exam: | | | | options are High, Medium, and Low. In the Basic |
| When configuring a basic firewall in SDM, what are | | | | Firewall Wizard, you cannot create your own custom |
| the three options for the preconfigured security | | | | security levels, but you can do so in the Advanced |
| levels? Can you create your own custom security | | | | Wizard. |
| levels? | | | | CCNP BSCI Answer: By default, EIGRP uses up to 50 |
| CCNP Certification / BSCI Exam: | | | | percent of a given interface's bandwidth. If you wish |
| In the following output, describe.... | | | | to change this default, it can be done with the |
| 1. Why we would use this command in the first place | | | | interface-level command ip bandwidth-percent eigrp. |
| 2. The meaning of "100" | | | | R1(config)#int s0 |
| 3. The meaning of "300" | | | | R1(config-if)#ip bandwidth-percent eigrp ? |
| 4. The default setting for this particular value, and | | | | Autonomous system number |
| what we're changing it to. | | | | R1(config-if)#ip bandwidth-percent eigrp 100 ? |
| R1(config-if)#ip bandwidth-percent eigrp 100 300 | | | | Maximum bandwidth percentage that EIGRP may use |
| CCNP Certification / BCMSN Exam: | | | | R1(config-if)#ip bandwidth-percent eigrp 100 300 |
| What router redundancy protocol is defined by RFC | | | | I am showing you this command's values with IOS |
| 2281? | | | | Help to remind you that you should develop the habit |
| CCNP / ONT Exam: | | | | of always taking a few extra seconds to check the |
| IntServ uses RSVP, but DiffServ does not. What | | | | values - because in this command, the values look |
| does DiffServ use in place of RSVP? | | | | really strange. How in the world can I set EIGRP 100 |
| Here are the answers! | | | | to use 300% of an interface's bandwidth? And why |
| CCNA: Answer: That's the output of debug ip rip. | | | | would I ever do that? |
| CCENT: Answer: When the router wants you to | | | | There is always the chance that the actual physical |
| know something, it wants you to know right now. If | | | | speed of the interface exceeds the logical setting. |
| the router sends a message to the console while | | | | You could take an interface with a 512 kbps interface |
| you're entering a command, by default the router will | | | | and give it a logical setting of 56 kbps. |
| interrupt your work to show you this message. | | | | If you then wanted the line to allow EIGRP to use |
| In the following example, I opened a Serial interface, | | | | 168 kbps of the physical bandwidth, you'd set the |
| which will always result in at least two messages | | | | bandwidth-percent value to 300, which allocates |
| relating to the physical and logical state of the | | | | 300% of 56kbps to EIGRP traffic - which is 3 x 56, |
| interface. I started typing a sentence immediately | | | | or 168. |
| after I opened the interface to show you what | | | | I know it sounds crazy, so here's the proof that you |
| happens. I've bolded the sentence I was entering. | | | | can actually do this: |
| R1(config)#int s0 | | | | R3(config)#interface serial0 |
| R1(config-if)#no shut | | | | R3(config-if)#bandwidth 56 |
| R1(config-if)#^Z | | | | R3(config-if)#ip bandwidth-percent eigrp ? |
| R1#so here i am | | | | Autonomous system number |
| 4d04h: %SYS-5-CONFIG_I: Configured from console | | | | R3(config-if)#ip bandwidth-percent eigrp 100 ? |
| by consoletyp | | | | Maximum bandwidth percentage that EIGRP may use |
| 4d04h: %LINK-3-UPDOWN: Interface Serial0, changed | | | | R3(config-if)#ip bandwidth-percent eigrp 100 300 |
| state to uping and | | | | BCMSN: Answer: Our old friend HSRP - the Hot |
| 4d04h: %LINEPROTO-5-UPDOWN: Line protocol on | | | | Standby Routing Protocol. |
| Interface Serial0, changed state to upi've been | | | | ONT: Answer: DiffServ uses PHB - Per-Hop Behavior. |
| interrupted quite badly! | | | | Look for more Cisco certification exam practice |
| 4d04h: %LINEPROTO-5-UPDOWN: Line protocol on | | | | question sets and fully-illustrated tutorials on my |
| Interface Serial0, changed state to down | | | | website as well as the one you're on right now! |