NETWORK TROUBLESHOOTING DECEMBER 2022 PAST PAPER

MONDAY: 5 December 2022. Morning Paper. Time Allowed: 3 hours.

Answer ALL questions. This paper has two sections. SECTION I has twenty (20) short response questions. Each question is allocated two (2) marks. SECTION II has three (3) practical questions of sixty (60) marks. Marks allocated to each question are shown at the end of the question.

Required Resources:

  • Computer
  • Simulator such as GNS3/packet tracer

SECTION I (40 MARKS)

1. IP Routing is a process that sends packets from a host on one network to another host on a different remote network. Which command utility can be used on a host to display IP Routing table? (2 marks)

2. Ayden a newly hired system administrator wanted to modify the name of a router in the network. Which network
protocol can he use to securely access the router remotely over the network? (2 marks)

3. The TCP/IP Stack works just like the OSI model by establishing a set of rules and standards for communication in and between the different layers. Which component of the computer is believed to be functioning well when a user is able to ping the ip address of the localhost successfully? (2 marks)

4. Network statistics (netstat) command is a networking tool used for troubleshooting and configuration that can also serve as a monitoring tool for connections over the network. Which command option can be used to list TCP
connections only? (2 marks)
5. Which command utility is used to test the ability of the source computer to reach a specified destination computer
until stopped? (2 marks)
6. A command utility that is mostly in Linux operating system used to trace path from source to destination in an
internetwork is called? (2 marks)
7. As a safety measure a network administrator has been mandated to ensure the guest computers for an upcoming
conference cannot ping each other. Which settings can be used to accomplish this task? (2 marks)
8. Debug ip icmp command is used to display information about Internal Control Message Protocol (ICMP)
transactions and allows you to monitor the ICMP messages sent and received by your router. What is the name of
the command that can be used to stop the debug command on a router? (2 marks)
9. A user tried to access the internet using a computer and received an IP Address of 169.254.142.5. What is the name
of the application layer protocol that failed? (2 marks)

10. Network latency is a term used to describe delays in communication over a network. What mechanism can be implemented in a small network to help minimize network latency for real-time streaming applications? (2 marks)

11. The command tool that is used to provide information about network latency and network loss at intermediate hops between a source and destination is known as? (2 marks)

12. ARP command is a TCP/IP utility used for viewing and modifying the local Address Resolution Protocol (ARP) cache that contains resolved MAC addresses of Internet Protocol (IP) hosts on the network. Which command utility is used to display computer’s ARP table? (2 marks)

13. Ms-Dos command utility that enables a user to look up the IP address of a domain or host on a Network is referred to as? (2 marks)

14. Topology defines the structure of the network of the way components are interconnected to each other. Which element of scaling a network involves identifying the physical and logical topologies? (2 marks)

15. Which layer of the Open system Interconnection (OSI) model should be considered when troubleshooting mode of communication between two routers that are geographically far apart? (2 marks)

16. A user reported that she is unable to reach the website when typing http://www.kasneb.or.ke in a web browser, but can reach the same site by typing http://209.168.4.80. What could be the probable cause of the issue? (2 marks)

17. IP stack in network setup is considered to be initialized when an individual test connectivity to which type of IP address? (2 marks)

18. Which element of network design consideration will be best suited to a large corporation as compared to small medium enterprise type of business? (2 marks)

19. The performance metrics obtained by measuring the network for a particular time period is called? (2 marks)

20. The Internet record listing command that contains the details of who owns a domain name and how to get in touch with them is referred to as? (2 marks)

SECTION II (60 MARKS)

21. Commands can be very useful when documenting a network especially when a Network administrator wants to
gather information directly from routers and switches. Below is a list of commands issued in an intermediary device,
that is a router for data collection. Give the description of the commands listed:

22. Examine the flowchart below and answer the questions based on the following scenarios:

Describe what is MOST likely to happen if the destination address in the packet:

Does not match entry in the routing table. (5 marks)

Matches a single entry in the routing table. (5 marks)

Matches more than entry in the routing table and the routing entries have the same prefix length. (5 marks)

Matches more than entry in the routing table and the routing entries have different prefix length. (5 marks)

(Total: 20 marks)

Create a word processing document named “Topology” and use it to save answers to questions 1 to 4

23. Using appropriate simulator, design the topology as shown below.

Required:

1. Capture a screenshot displaying the Internet Protocol address of the intermediary devices. (6 marks)

2. Capture a screenshot displaying connectivity between:

PC-X and PC-Y. (2 marks)

RI and PC-X. (2 marks)

SW1 and PC-Y. (2 marks)

3. Capture a screenshot showing traceability from PC-X to RI. (4 marks)

4. Capture a screenshot from RI displaying layer I and II of the OSI Model. (4 marks)

(Total: 20 marks)

Upload “Topology” document.

(Visited 102 times, 1 visits today)
Share this:

Written by