Day 2: Studying Sample Exam Questions

I'm probably not gonna be able to take the exam this weekend plus I'm booked for an Oracle course next week so I'll spend some extra time studying sample exam questions. This is gonna be an overview of interesting questions (for me) collected from various books and sites to review just before exam day.

This post will be updated till I take (and pass) the exam...

• It is not possible to obtain CDP information about a remote device. Don't answer that you can use SSH or Telnet.
• A CDP update packet has platform and device identifiers information.
• show cdp entry * produces the same result as the show cdp neighbors detail command.
• show cdp interface displays the frequency at which packets are sent, encapsulation type and holdtime for an interface where CDP is enabled. show cdp traffic displays CDP packet checksum errors. This is an example (thx to David L. from CLN):

          P1R1#show cdp interface

          FastEthernet0/0 is up, line protocol is down

          Encapsulation ARPA

          Sending CDP packets every 60 seconds

          Holdtime is 180 seconds

          FastEthernet0/1 is administratively down, line protocol is down

          Encapsulation ARPA

          Sending CDP packets every 60 seconds

          Holdtime is 180 seconds

          Serial0/0/1 is up, line protocol is up

          Encapsulation HDLC

          Sending CDP packets every 60 seconds

          Holdtime is 180 seconds

          P1R1#show cdp traffic

          CDP counters :

          Total packets output: 38, Input: 34

          Hdr syntax: 0, Chksum error: 0, Encaps failed: 0

          No memory: 0, Invalid packet: 0, Fragmented: 0

          CDP version 1 advertisements output: 0, Input: 0

          CDP version 2 advertisements output: 38, Input: 34

• ROMMON is a low-level os normally used for manufacturing testing and troubleshooting.
• If the boot field value is 0x2 then the router will check the startup-config file for boot system commands. The boot field is the low-order 4 bits of the configuration register in a Cisco router. the value in part tells the router where to look for a Cisco IOS image to load.
• On most routers, the Cisco IOS software is loaded into RAM to run, but on some routers it's run directly from flahs memory.
• show flash displays the amount of memory that's available where the IOS image is stored, don't mix this up with show run!
• service timestamps command is used to add time stamps to a debug or log message.
• The application layer is the most diverse area of the OSI model and the TCP/IP stack.