The new website's about two weeks off, but why wait for a new CCNA and CCENT practice exam? You'll find the answers at the end of this post. Go get 'em!

1. You'd really like to have a look at your Cisco router's current config register settings. What's the best command to use to do so? (No choices on this one!)

2. Of the following Cisco router settings, which are defaults?

A. Password encryption: enabled

B. 0x2102 is the config register setting

C. All serial ports belong to the native VLAN

D. The physical interfaces are open


3. This time, we're talking about Cisco switches. Which of the following are defaults?

A. Physical interfaces are all open

B. All Fast Ethernet ports are in VLAN 1

C. Those same ports are all in the same collision domain

D. Port security: enabled


4. No multiple choice on this one. What are the three frame processing methods available to a Cisco switch? (Extra credit - briefly describe the operation of each.)

The answers right after this important opportunity!

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And now.... the answers!

1. This output is WAY at the bottom of the "show version" output. You usually have to hit "enter" an extra time to see all of it, as shown here:

R1#show version
ROM: System Bootstrap, Version 12.2(8r) [cmong 8r], RELEASE SOFTWARE (fc1)

R1 uptime is 2 days, 10 hours, 52 minutes
System returned to ROM by power-on
System image file is "flash:c2600-adventerprisek9_ivs-mz.124-19.bin"

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to export@cisco.com.

Cisco 2651XM (MPC860P) processor (revision 3.0) with 105472K/25600K bytes of memory.
Processor board ID JAE0816E244
M860 processor: part number 5, mask 2
2 FastEthernet interfaces
4 Low-speed serial(sync/async) interfaces
32K bytes of NVRAM.
32768K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102

Told ya!

2. Of these four, the only default setting is the config register setting of 0x2102. Password encryption is disabled by default rather than enabled, serial ports don't belong to VLANs, and the physical interfaces on Cisco routers are closed by default.


3. Now to the switches! The correct defaults is that the physical interfaces are indeed all open (a security concern, to be sure) and that all FastEthernet ports are in VLAN 1, the native VLAN.

As for the other two choices, Cisco switch ports are individual collision domains (not all in the same collision domain), and port security is disabled by default.


4. Those frame forwarding methods and a brief description of each:

Store-and-forward: The entire frame is stored, then forwarded. (Makes sense!) Has the highest level of error checking of these three methods, since the entire frame is checked.

Fragment-free: Only the first 64 bytes of the frame are checked for errors. That's where most frame errors pop up, so it's still an effective method.

Cut-through switching: Fastest method of the three, but there's no error checking.

I'll see you Tuesday, May 17 with a new CCNA practice exam and a new 5:00 Video Boot Camp on my YouTube channel!

Enjoy your day,

Chris B.
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