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Second Line Troubleshooting Training

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Second Line Troubleshooting Training

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1. 1. What is an IP address?
A type of router A wireless signal A unique identifier assigned to a device on a network A physical cable connection
2. 2. Which of the following is a private IP address?
1.1.1.1 192.168.1.1 8.8.8.8 41.220.0.1
3. 3. What is a public IP address?
Used only inside local networks Used only by routers internally Accessible over the internet and assigned by an ISP Not routable on the internet
4. 4. Why are private IP addresses used in networks?
To replace routers To connect directly to the internet To increase signal strength To save public IP space and allow internal communication
5. 5. What is the main purpose of using the OSI model in troubleshooting?
To increase internet speed To configure routers To replace monitoring tools To structure and isolate network faults
6. 6. Which OSI layer is responsible for physical connectivity such as cables and signal transmission?
Layer 4 Layer 2 Layer 1 Layer 3
7. 7. A client device is offline due to a power failure. This issue belongs to which OSI layer?
Layer 2 Layer 7 Layer 3 Layer 1
8. 8. Which of the following tools is used to test reachability of a device on the network?
VLAN ARP NAT PING
9. 9. Which of the following indicates a Layer 2 issue?
DNS failure Incorrect IP address VLAN misconfiguration D. Faulty fibre cable
10. 10. What is the primary function of a MAC address?
Encrypt data Identify a device on a local network Assign IP addresses Identify a device on a global network
11. 11. In a fibre network, what does OLT stand for?
Optical Load Tool Optical Link Terminal Optical Line Terminal Online Line Transfer
12. 12. Which device is responsible for terminating fibre connections and connecting multiple ONUs?
BTS Router Switch OLT
13. 13. What is the main function of an ONU?
Converts optical signals to electrical signals for customer use Connects the core network to the internet Distributes WiMAX signals Manages bandwidth at the POP
14. 14. What is the role of a POP (Point of Presence) in a network?
Installs fibre cables Replaces routers Connects customer networks to the core network Provides power to routers
15. 15. What connects the access network to the core network?
ONU CPE POP Router
16. 16. In WiMAX installations, what does CPE stand for?
Core Protocol Engine Central Processing Equipment Communication Port Extension Customer Premises Equipment
17. 17. What is the main function of a BTS in a WiMAX network?
Converts fibre signals Provides wireless communication between users and the network Acts as a router Stores customer data
18. 18. In WiMAX setups, what is the purpose of signal alignment?
To configure routers automatically To reduce cable usage To improve connection quality and signal strength To increase fibre speed
19. 19. What is checked during signal validation in both fibre and WiMAX installations?
Router brand Internet pricing Cable color Signal strength and quality
20. 20. What is the main purpose of PPPoE in router configuration?
Connecting fibre cables Increasing signal strength Establishing a secure connection over Ethernet Assigning IP addresses manually
21. 21. During fibre installation, what is the key difference between indoor and outdoor fibre?
Indoor fibre uses wireless signals Outdoor fibre is designed to withstand environmental conditions Outdoor fibre does not require protection Indoor fibre is faster than outdoor fibre
22. 22. What is the first step when troubleshooting a Core Link on a Core Switch
Restart the POP Change IP address Replace the router Check if the SFP interface is up (link status)
23. 23. If an SFP link is down, which of the following should be checked?
Router brand Fibre connection and SFP module status Customer password Wi-Fi signal strength
24. 24. What is the purpose of a Telco topology diagram?
To configure routers To show customer billing To test signal strength To display how network devices and POPs are interconnected
25. 25. Why do POPs have redundant links?
To reduce speed To avoid troubleshooting To provide backup paths in case of link failure To increase installation cost
26. 26. During troubleshooting, an ONU is offline on the OLT. What should be checked first?
Firewall rules Application settings Physical connectivity and power None of the above
27. 27. Which of the following tools helps determine the path packets take to a destination?
ARP DHCP Ping Traceroute
28. 28. A customer reports slow internet speeds. What is the MOST relevant first check?
DNS records IP subnet mask Signal levels and bandwidth allocation MAC address
29. 29. Which of the following scenarios requires escalation to 3rd Line Support?
Disabled account Complex routing or core network fault Loose Ethernet cable ONU power issue
30. 30. When handling a “Host Down” ticket, what is the correct troubleshooting approach?
Replace equipment without testing Escalate immediately Only check application settings Start from Layer 1 and move upward systematically