1) What condition is most accurate when describing the Spanning-Tree Protocol?

A. When loops occur, some switches see stations appear on more than one side of the switch. This confuses the algorithm and causes duplicate frames to be forwarded.

B. None of these

C. A failure of the Spanning-Tree Protocol causes a lock condition within the router port because of multiple paths to the destination.

D. A routing loop occurs and the switch puts that port into standby mode.

The book says the answer is A. I think this is poorly worded and leads to confusion. Where it says "confuses the algorithm" one would think, "What, it confuses itself??" Substitute here "confuses the bridging logic" and I might agree.

2) If an interface is administratively down, what is the problem?

A. The interface is bad.

B. The interface is not connected to another device.

C. There is no problem.

D. The interface is looped.

The answer is C. Seems like a trick question. Reasoning: The administrator has shut down the interface for a good reason, therefore, unless he/she is stupid, there should be no problem with this. Right?

3) Can you use store and forward with full-duplex? How about cut-through with half duplex?

4) Spanning Tree Root Bridge priorities cannot be changed from the default of 32768. True or false?

Book says false. I object to the wording on this question. There's no default priority for a root bridge. I would reword it: "Bridges in a Spanning Tree configuration cannot have their initial default priorities changed from 32768." Anyone with any comments?

5)"copy start tftp" and "copy nvram tftp" are both valid commands for copying the saved config to tftp. True or false?

6) What is encapsulation?

A) Adding a header on an incoming segment
B) Adding a header on an outgoing frame
C) Adding the header on an incoming frame
D) Removing the header on an outgoing segment
E) Adding a header on an outgoing bit
F) Removing a header on an outgoing bit

Answer is C. Yuk. The wording here jars with me: unless what is meant by outgoing is "onto the wire" (ie. frames to bits). Thoughts?

7) Term for native ISDN telephone = TE1. Term for native ISDN modem = TA. Huh?

8) Which of the following trunk modes would form a trunk if connected to another switched port with a trunk setting of auto?

A) Auto
B) Nonegotiate
C) Desirable
D) On

Book says B, C, D. I vote C and D only. My reasoning is due to this qoute from McQuerry: "Auto: Enables the port to become a trunk only if the connected device has state set to on or desirable." There is no mention of nonegotiate...

Please help me folks!!

Deets

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4) Spanning Tree Root Bridge priorities cannot be changed from the default of 32768. True or false?
False. you can change the default of 32768.
see below http://www.cisco.com/univercd/cc/td...tm#xtocid287968

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Deets,
I think the books' answer to No 6 is wrong! It shoulb be B.
No 7. TA- ISDN Modem.

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Oops, pressed tha TAB key by mistake.

No 1 is a poor question!!!! Not sure I totally agree with their answer either. I would answer B.

No 2 is a trick. You should pick out the KEYWORD 'Administratively Down', dosn't apply to any of the other answers.

No 3. I've never seen this question before. I would say the answer is True. Half Duplex is how 10 BaseT ethernet works anyway, the switch is just a component of this topology. Full Duplex is also possible, as long as you have only one node on each switch interface.
Store & F and Cut Through are Red Herrings!

No 4. Havn't a clue!!!!!

No 5. Don't think either of these are valid. Not 100% though.

No 6. See previous. Answer is not C. But B. Boson test has a very similar Q.

No 7. If I understand this correct, you are confused about the differences between the two. TA is really a term that applies to native ISDN equipment in general, not neccessarily just modems. TE1 applies to special ISDN telephones. TE2 applies to Non-native ISDN phones, ie analogue. I could be corrected on this one.

No 8 is another question that is poorly worded. I really couldn't help with that one.

Sounds to me like the questions in your book **** !!!!!

Good luck for this week. You're ready. Don't try to KNOW everything in depth, otherwise you'll be looking for a trick question where there are none. Just do it!

M

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All in one:

1) Answer B: None of these. STP is designed to stop loops from occuring and certainly won't be confused by one. Answers C and D mention routers and can be discarded.
2) Answer C: If an interface is administratively down, someone with access to the device has specifically shutdown the interface. That doesn't mean to say there is not a problem or that the interface is not connected to another device however you are not given enough information to be able to select A, B or D.
3) Yes and yes. Duplex settings have no affect on Layer 2 switching modes as duplex is a Layer 1 function.
4) False, wording seems fine to me.
5) False, kind of. Copy start tftp is a valid command, however copy nvram tftp is incomplete and should read: 'copy nvram:startup-config tftp'
6) Answer:B Encapsulation will only take place outbound as it may not be required for all potential interfaces etc.
7) Refer to previous answers.
8) Answer C and D. Auto to auto will not convert and nonegotiate will only convert if the other end is manually set to on. Check out: http://www.cisco.com/univercd/cc/td...htm#xtocid57313 for more info.

Cheers, Steve

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5) TRUE
copy start tftp
copy nvram tftp
are both valid commands
(although you have to add host and filename on a further dialogue)

siegi

[This message has been edited by edlinger (edited 11-06-2000).]

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quote:

---

Originally posted by edlinger:
5) TRUE
copy start tftp
copy nvram tftp
are both valid commands
(although you have to add host and filename on a further dialogue)

siegi

[This message has been edited by edlinger (edited 11-06-2000).]

---

Can you submit an example for the second one?

I just went to r1r2.com free router lab and couldn't find 'copy nvram ...' command

I don't think there's such command exists.

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The copy nvram command was only introduced with v12 of the IOS

Cheers, Steve

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The new command is:
copy nvram:startup-config tftp:

But I'm not sure you can use:
copy nvram tftp
(According to cisco, 'startup-config' is the short cut keyword for 'nvram:start-config')


Can anyone try this command and post a hard copy? Thanks!

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no. 4 ist false

You can^t change the default to 32768,
32768 is the default.

FvD

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