1. Match each item with its appropriate diagram type:
IP address and subnet
Operating system version
Device type and model
A. Physical diagram
B. Logical diagram
2. What is one symptom of a physical layer problem?
- High CPU utilization
- Excessive broadcasts
- Slow STP convergence
- Routing loops
3. A network administrator receives the output “Serial0 is up, line protocol is down” from the show interface s0 command. At what layer is this problem most likely being caused?
- Physical layer
- Data link layer
- Network layer
- Transport layer
4. Which statement is true about network models?
- Although it’s similar to the OSI model in construction, the TCP/IP model has more layers.
- The network access layer in the OSI model incorporates both physical and data link layers in the TCP/IP model.
- Both users and application layer processes interact with software applications that contain a communications component in the OSI model.
- TCP/IP communications relate to only the TCP/IP model.
5. Which protocols can be involved in network layer problems? (Choose three.)
6. Match the application layer protocol with the port number it is commonly associated with:
A. 20 and 21
7. A technician has been asked to troubleshoot a simple network problem that seems to be caused by software. Which troubleshooting approach would you suggest?
8. Which questions are appropriate to ask when gathering information from a user? (Choose three.)
- What does work?
- Who did you call after the problem appeared?
- When did you first notice the problem?
- When does the problem occur?
- What is your password?
- What did you do after the problem occurred?
9. Which network troubleshooting tool can you use to test the physical medium for defects, such as near-end crosstalk?
- Cable analyzer
- Cable tester
- Digital multimeter
- Baselining tool
10. Which documents are needed to efficiently diagnose and correct network problems? (Choose three.)
- Network management command reference
- Network configuration tables
- Network device installation guide
- Network topology diagrams
- End-system configuration tables
- Service provider documentation
11. What are the steps for establishing a network baseline? (Choose three.)
- Determine the type of network management traffic to be collected and evaluated.
- Determine the types of data to be collected and evaluated.
- Identify devices and ports to be monitored.
- Identify the virtual interfaces, VLANs, and virtual routing tables to be monitored.
- Determine the number of baseline tests to establish a typical picture of the network.
- Determine the duration for baseline testing to establish a typical picture of the network.
12. What is associated with the first step of correcting application layer problems?
- Analyzing existing symptoms
- Making a backup of configurations
- Making the initial hardware or software changes
- Pinging the default gateway to verify Layer 1 to Layer 3 functionality
13. Explain the function and contents of network documentation, including router, switch, and end-user documentation, as well as network topology diagrams.
14. Explain the recommended steps for planning the first network baseline.
15. Explain the three stages of the general troubleshooting process.
16. Explain the three main troubleshooting methods.
17. Explain the six steps of designing or modifying a WAN.
18. List at least three things to check when troubleshooting Layer 1 problems.