NET 10-P1 Diagnostics and Troubleshooting

Question 1

The first and most important step is gathering information and symptoms from network devices, end systems, and users

Answer 1

Troubleshooting Steps: Gather information

Question 2

sexond step is based on symptoms, eliminate variables until a single problem or a set of related problems is identified as the cause

Answer 2

Troubleshooting Steps: Isolate the problem

Question 3

third step is consider the severity of the problem and the impact of the solution. Then begin planning, testing and documenting possible solutions

Answer 3

Troubleshooting Steps: Implement a solution

Question 4

fourth step is if the problem was not solved, repeat steps two and three again and deepen the research

Answer 4

Troubleshooting Steps: Problem Solved?

Question 5

final step: Document every step you took in the process for future reference

Answer 5

Troubleshooting Steps: Documentation* (most important)

Question 6

What are the data points when gathering information for Troubleshooting?

Answer 6

1. ) Question end users
2. ) Protocol analyzers (Wireshark, etc.)
3. ) Physical troubleshooting tools (cable tester, others)
4. ) Network management software
5. ) CMD network commands
6. ) show and debug commands
7. ) IP SLA: monitors network performance in real-time
8. ) Neighbor Discovery Protocols

Question 7

In this method, the starting point is at the bottom of the OSI model: the physical layer

Answer 7

Troubleshooting OSI: Bottom-Up

Question 8

IN this method, the starting point is at the top of the OSI model: The application layer

Answer 8

Troubleshooting OSI: Troubleshooting OSI:

Question 9

The starting point is not predefined as in other methods, A particular layer is selected and examined; if the layer functions, then the next layer to examine is the one above it. IF the layer is faulty, then move to the next one

Answer 9

Troubleshooting OSI: Divide and Conquer

Question 10

Provides excellent tools for troubleshooting

Answer 10

Network management Software

Question 11

This command outputs a large volume of information, including interface errors, bandwidth utilization, and interface speed

Answer 11

show interfaces

Question 12

This command verifies network reachability

Answer 12

show ip route

Question 13

This command displays all connected devices that CDP can communicate with

Answer 13

show cdp neighbors

Question 14

is a neighbot Discovery protocol similar to CDP developed by IEEE. is an industry standard protocol,

Answer 14

Link Layer Discovery Procol

Question 15

is a neighbor Discovery protocol similar to CDP developed by IEEE. is an industry standard protocol,

Answer 15

Link Layer Discovery Protocol

Question 16

is a standard for logging messages. Each device records actions and events that occur like a private diary

Answer 16

Syslog

Question 17

If a syslog server is configured on this device, the device will send all syslog messages to the server over the ___ port

Answer 17

UDP 514

Question 18

Server that connects with external source that helps keep all devices on your network synced to the accurate time and date

Answer 18

Network Time protocol

Question 19

Server that connects with external source that helps keep all devices on your network synced to the accurate time and date

Answer 19

Network Time protocol - NTP*

Question 20

Cisco routers and switches (and many other devices around the world) use NTP to deteremine the date and time, although routerts and switches can also act as NTP servers

Answer 20

NTP usage

Question 21

command setting the clock

Answer 21

clock set

Question 22

this command is ued when server is configured for the clock

Answer 22

ntp server