Term
| 1. Name two Symptoms of Data Link Layer Problems. |
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Definition
| A: No connectivity at the network layer or above, No functionality at the network layer or above, Network performance below baseline, Console error messages |
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Term
| 2. Name the issues at the Data Link layer that commonly result in network connectivity or performance problems include: |
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Definition
| A: Encapsulation errors, Addressing Mapping errors, Framing errors, STP Failures or Loops |
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Term
| 3. An encapsulation error occurs because the bits placed in a particular field by the sender are not what the receiver expects so see. Give an example when this condition occurs: |
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Definition
| A: It happens when the encapsulation at one end of a WAN link is configured differently from the encapsulation used at the other end. |
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Term
4.What are the reasons the mapping of Layer 2 and Layer 3 information can fail in a dynamic environment?
a. Devices are configured not to respond to ARP or Inverse-ARP requests
b. Layer 2 or Layer 3 information chached may have physically changed.
c. Invalid ARP replies are received because of a misconfiguration or a security attack.
d. all of the above |
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Definition
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Term
| 5. Forwarding loops occur when no port in a redundant topology is blocked and traffic is forwarded in circles indefinitely. What protocol resolves this issue? |
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Definition
| STP – Spanning Tree Protocol |
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Term
| 6. How do you troubleshoot problems with PPP involving link negotiation? Name the three steps and give the commands you would use. |
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Definition
Step1: Check encapsulation at both end; show interfaces serial
Step2: Confirm Link Control Protocol negotiation succeeded; show interfaces serial
Step3: Verify authentication on both sides of the link; debug ppp authentication |
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Term
7.What commands would you use to troubleshoot Frame Relay network issues?
a. frame-relay lmi c. show frame-relay pvc
b. show interfaces serial d. debug ppp authentication |
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Definition
a. frame-relay lmi c. show frame-relay pvc
b. show interfaces serial |
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Term
| 8.When troubleshooting Frame Relay network issues the first step is to verify the physical connection between the CSU/DSU and the router. |
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Definition
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Term
| 9.What command is issued to verify STP operation on each switch? |
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Definition
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Term
| 10. Issue the command to enable STP. |
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Definition
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Term
| 11.The “show cdp neighbor detail” command is used to obtain detailed information about directly connected Cisco neighbor devices. |
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Definition
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Term
12.The “telnet” command is used to ________________ for accessing configuration information.
a. log in locally to a device
b. log in remotely to a device
c. see the MAC address of a device
d. see the IP address of a device |
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Definition
| b. log in remotely to a device |
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Term
14.What information is typically recorded on a physical diagram (choose three)?
a. OS Version d. Device type
b. Routing protocols e. Static routes
c. Cable type f. IP address |
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Definition
a. OS Version
c. Cable type
d. Device type |
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Term
13. “show ip route” displays the ___________, __________, and ____________
a. routing protocols that have been configured
b. directly connected neighbors
c. routing table
d. interface status |
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Definition
a. routing protocols that have been configured
b. directly connected neighbors
c. routing table |
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Term
| 15. When troubleshooting your network the ping command is used to test connectivity with a neighbor device. |
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Definition
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Term
| 16. The Telnet command requires both a username and password to access device. |
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Definition
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Term
17.On a cisco router to view a quick display of up or down status; what is the command?
a. show ip interface brief c. show interfaces
b. show ip interface d. show run |
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Definition
| a. show ip interface brief |
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Term
18. When establishing a Network Baseline when is the best time to do it?
a. during a normal or average day c. A and B
b. during evenings d. during maintenance |
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Definition
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Term
19. What are the different types of troubleshooting approach (Choose 4)
a. Top down d. Theorist
b. Bottom up e. Brute force
c. Divide and Conquer f. Systematic |
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Definition
a. Top down
b. Bottom up
c. Divide and Conquer
f. Systematic |
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Term
| 20. What are the three general steps in troubleshooting process __________, _________, and __________? |
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Definition
| A: Gather Symptoms, Isolate the Problem, Correct the Problem |
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Term
| 21. CiscoView, HP Openview, Solar Winds, and What's Up Gold are examples of commonly used _____________________. |
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Definition
| A: network management tools /(NMS) |
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Term
| 22. _______________ help you with common baselining documentation tasks. |
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Definition
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Term
| 23. ________________ are test instruments that are used to directly measure electrical values of voltage, current, and resistance. |
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Definition
| A: Digital Multimeters (DMMs) |
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Term
| 24. The 2 extreme approaches to troubleshooting are the Rocket scientist approach and the Caveman approach. |
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Definition
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Term
| 25. What are the 7 layers of the OSI model? |
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Definition
A:
physical
data-link
network
transport
session
presentation
application |
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Term
| 26. A ________ approach minimizes confusion and cuts down on time otherwise wasted with trial and error. |
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Definition
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Term
| 27. WANs carry a variety of traffic types, such as data, voice, and video. |
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Definition
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Term
28. WAN data transfer speed (bandwidth) is considerably ________ than the common LAN bandwidth.
a. Slower
b. Faster
c. Higher
d. Lower |
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Definition
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Term
29.A significant proportion of the support calls received by an ISP refer to slowness of the Network. To troubleshoot this effectively, you have to isolate the individual components and test each one as follows:
a. Individual PC host
b. LAN
c. Backbone of the ISP
d. Server being accessed
e. All A, B, C & D |
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Definition
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